diff options
author | RajithaY <rajithax.yerrumsetty@intel.com> | 2017-04-25 03:31:15 -0700 |
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committer | Rajitha Yerrumchetty <rajithax.yerrumsetty@intel.com> | 2017-05-22 06:48:08 +0000 |
commit | bb756eebdac6fd24e8919e2c43f7d2c8c4091f59 (patch) | |
tree | ca11e03542edf2d8f631efeca5e1626d211107e3 /qemu/exec.c | |
parent | a14b48d18a9ed03ec191cf16b162206998a895ce (diff) |
Adding qemu as a submodule of KVMFORNFV
This Patch includes the changes to add qemu as a submodule to
kvmfornfv repo and make use of the updated latest qemu for the
execution of all testcase
Change-Id: I1280af507a857675c7f81d30c95255635667bdd7
Signed-off-by:RajithaY<rajithax.yerrumsetty@intel.com>
Diffstat (limited to 'qemu/exec.c')
-rw-r--r-- | qemu/exec.c | 3766 |
1 files changed, 0 insertions, 3766 deletions
diff --git a/qemu/exec.c b/qemu/exec.c deleted file mode 100644 index c4f903618..000000000 --- a/qemu/exec.c +++ /dev/null @@ -1,3766 +0,0 @@ -/* - * Virtual page mapping - * - * Copyright (c) 2003 Fabrice Bellard - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see <http://www.gnu.org/licenses/>. - */ -#include "qemu/osdep.h" -#include "qapi/error.h" -#ifndef _WIN32 -#include <sys/mman.h> -#endif - -#include "qemu/cutils.h" -#include "cpu.h" -#include "tcg.h" -#include "hw/hw.h" -#if !defined(CONFIG_USER_ONLY) -#include "hw/boards.h" -#endif -#include "hw/qdev.h" -#include "sysemu/kvm.h" -#include "sysemu/sysemu.h" -#include "hw/xen/xen.h" -#include "qemu/timer.h" -#include "qemu/config-file.h" -#include "qemu/error-report.h" -#include "exec/memory.h" -#include "sysemu/dma.h" -#include "exec/address-spaces.h" -#if defined(CONFIG_USER_ONLY) -#include <qemu.h> -#else /* !CONFIG_USER_ONLY */ -#include "sysemu/xen-mapcache.h" -#include "trace.h" -#endif -#include "exec/cpu-all.h" -#include "qemu/rcu_queue.h" -#include "qemu/main-loop.h" -#include "translate-all.h" -#include "sysemu/replay.h" - -#include "exec/memory-internal.h" -#include "exec/ram_addr.h" -#include "exec/log.h" - -#include "qemu/range.h" -#ifndef _WIN32 -#include "qemu/mmap-alloc.h" -#endif - -//#define DEBUG_SUBPAGE - -#if !defined(CONFIG_USER_ONLY) -/* ram_list is read under rcu_read_lock()/rcu_read_unlock(). Writes - * are protected by the ramlist lock. - */ -RAMList ram_list = { .blocks = QLIST_HEAD_INITIALIZER(ram_list.blocks) }; - -static MemoryRegion *system_memory; -static MemoryRegion *system_io; - -AddressSpace address_space_io; -AddressSpace address_space_memory; - -MemoryRegion io_mem_rom, io_mem_notdirty; -static MemoryRegion io_mem_unassigned; - -/* RAM is pre-allocated and passed into qemu_ram_alloc_from_ptr */ -#define RAM_PREALLOC (1 << 0) - -/* RAM is mmap-ed with MAP_SHARED */ -#define RAM_SHARED (1 << 1) - -/* Only a portion of RAM (used_length) is actually used, and migrated. - * This used_length size can change across reboots. - */ -#define RAM_RESIZEABLE (1 << 2) - -#endif - -struct CPUTailQ cpus = QTAILQ_HEAD_INITIALIZER(cpus); -/* current CPU in the current thread. It is only valid inside - cpu_exec() */ -__thread CPUState *current_cpu; -/* 0 = Do not count executed instructions. - 1 = Precise instruction counting. - 2 = Adaptive rate instruction counting. */ -int use_icount; - -#if !defined(CONFIG_USER_ONLY) - -typedef struct PhysPageEntry PhysPageEntry; - -struct PhysPageEntry { - /* How many bits skip to next level (in units of L2_SIZE). 0 for a leaf. */ - uint32_t skip : 6; - /* index into phys_sections (!skip) or phys_map_nodes (skip) */ - uint32_t ptr : 26; -}; - -#define PHYS_MAP_NODE_NIL (((uint32_t)~0) >> 6) - -/* Size of the L2 (and L3, etc) page tables. */ -#define ADDR_SPACE_BITS 64 - -#define P_L2_BITS 9 -#define P_L2_SIZE (1 << P_L2_BITS) - -#define P_L2_LEVELS (((ADDR_SPACE_BITS - TARGET_PAGE_BITS - 1) / P_L2_BITS) + 1) - -typedef PhysPageEntry Node[P_L2_SIZE]; - -typedef struct PhysPageMap { - struct rcu_head rcu; - - unsigned sections_nb; - unsigned sections_nb_alloc; - unsigned nodes_nb; - unsigned nodes_nb_alloc; - Node *nodes; - MemoryRegionSection *sections; -} PhysPageMap; - -struct AddressSpaceDispatch { - struct rcu_head rcu; - - MemoryRegionSection *mru_section; - /* This is a multi-level map on the physical address space. - * The bottom level has pointers to MemoryRegionSections. - */ - PhysPageEntry phys_map; - PhysPageMap map; - AddressSpace *as; -}; - -#define SUBPAGE_IDX(addr) ((addr) & ~TARGET_PAGE_MASK) -typedef struct subpage_t { - MemoryRegion iomem; - AddressSpace *as; - hwaddr base; - uint16_t sub_section[TARGET_PAGE_SIZE]; -} subpage_t; - -#define PHYS_SECTION_UNASSIGNED 0 -#define PHYS_SECTION_NOTDIRTY 1 -#define PHYS_SECTION_ROM 2 -#define PHYS_SECTION_WATCH 3 - -static void io_mem_init(void); -static void memory_map_init(void); -static void tcg_commit(MemoryListener *listener); - -static MemoryRegion io_mem_watch; - -/** - * CPUAddressSpace: all the information a CPU needs about an AddressSpace - * @cpu: the CPU whose AddressSpace this is - * @as: the AddressSpace itself - * @memory_dispatch: its dispatch pointer (cached, RCU protected) - * @tcg_as_listener: listener for tracking changes to the AddressSpace - */ -struct CPUAddressSpace { - CPUState *cpu; - AddressSpace *as; - struct AddressSpaceDispatch *memory_dispatch; - MemoryListener tcg_as_listener; -}; - -#endif - -#if !defined(CONFIG_USER_ONLY) - -static void phys_map_node_reserve(PhysPageMap *map, unsigned nodes) -{ - if (map->nodes_nb + nodes > map->nodes_nb_alloc) { - map->nodes_nb_alloc = MAX(map->nodes_nb_alloc * 2, 16); - map->nodes_nb_alloc = MAX(map->nodes_nb_alloc, map->nodes_nb + nodes); - map->nodes = g_renew(Node, map->nodes, map->nodes_nb_alloc); - } -} - -static uint32_t phys_map_node_alloc(PhysPageMap *map, bool leaf) -{ - unsigned i; - uint32_t ret; - PhysPageEntry e; - PhysPageEntry *p; - - ret = map->nodes_nb++; - p = map->nodes[ret]; - assert(ret != PHYS_MAP_NODE_NIL); - assert(ret != map->nodes_nb_alloc); - - e.skip = leaf ? 0 : 1; - e.ptr = leaf ? PHYS_SECTION_UNASSIGNED : PHYS_MAP_NODE_NIL; - for (i = 0; i < P_L2_SIZE; ++i) { - memcpy(&p[i], &e, sizeof(e)); - } - return ret; -} - -static void phys_page_set_level(PhysPageMap *map, PhysPageEntry *lp, - hwaddr *index, hwaddr *nb, uint16_t leaf, - int level) -{ - PhysPageEntry *p; - hwaddr step = (hwaddr)1 << (level * P_L2_BITS); - - if (lp->skip && lp->ptr == PHYS_MAP_NODE_NIL) { - lp->ptr = phys_map_node_alloc(map, level == 0); - } - p = map->nodes[lp->ptr]; - lp = &p[(*index >> (level * P_L2_BITS)) & (P_L2_SIZE - 1)]; - - while (*nb && lp < &p[P_L2_SIZE]) { - if ((*index & (step - 1)) == 0 && *nb >= step) { - lp->skip = 0; - lp->ptr = leaf; - *index += step; - *nb -= step; - } else { - phys_page_set_level(map, lp, index, nb, leaf, level - 1); - } - ++lp; - } -} - -static void phys_page_set(AddressSpaceDispatch *d, - hwaddr index, hwaddr nb, - uint16_t leaf) -{ - /* Wildly overreserve - it doesn't matter much. */ - phys_map_node_reserve(&d->map, 3 * P_L2_LEVELS); - - phys_page_set_level(&d->map, &d->phys_map, &index, &nb, leaf, P_L2_LEVELS - 1); -} - -/* Compact a non leaf page entry. Simply detect that the entry has a single child, - * and update our entry so we can skip it and go directly to the destination. - */ -static void phys_page_compact(PhysPageEntry *lp, Node *nodes, unsigned long *compacted) -{ - unsigned valid_ptr = P_L2_SIZE; - int valid = 0; - PhysPageEntry *p; - int i; - - if (lp->ptr == PHYS_MAP_NODE_NIL) { - return; - } - - p = nodes[lp->ptr]; - for (i = 0; i < P_L2_SIZE; i++) { - if (p[i].ptr == PHYS_MAP_NODE_NIL) { - continue; - } - - valid_ptr = i; - valid++; - if (p[i].skip) { - phys_page_compact(&p[i], nodes, compacted); - } - } - - /* We can only compress if there's only one child. */ - if (valid != 1) { - return; - } - - assert(valid_ptr < P_L2_SIZE); - - /* Don't compress if it won't fit in the # of bits we have. */ - if (lp->skip + p[valid_ptr].skip >= (1 << 3)) { - return; - } - - lp->ptr = p[valid_ptr].ptr; - if (!p[valid_ptr].skip) { - /* If our only child is a leaf, make this a leaf. */ - /* By design, we should have made this node a leaf to begin with so we - * should never reach here. - * But since it's so simple to handle this, let's do it just in case we - * change this rule. - */ - lp->skip = 0; - } else { - lp->skip += p[valid_ptr].skip; - } -} - -static void phys_page_compact_all(AddressSpaceDispatch *d, int nodes_nb) -{ - DECLARE_BITMAP(compacted, nodes_nb); - - if (d->phys_map.skip) { - phys_page_compact(&d->phys_map, d->map.nodes, compacted); - } -} - -static inline bool section_covers_addr(const MemoryRegionSection *section, - hwaddr addr) -{ - /* Memory topology clips a memory region to [0, 2^64); size.hi > 0 means - * the section must cover the entire address space. - */ - return section->size.hi || - range_covers_byte(section->offset_within_address_space, - section->size.lo, addr); -} - -static MemoryRegionSection *phys_page_find(PhysPageEntry lp, hwaddr addr, - Node *nodes, MemoryRegionSection *sections) -{ - PhysPageEntry *p; - hwaddr index = addr >> TARGET_PAGE_BITS; - int i; - - for (i = P_L2_LEVELS; lp.skip && (i -= lp.skip) >= 0;) { - if (lp.ptr == PHYS_MAP_NODE_NIL) { - return §ions[PHYS_SECTION_UNASSIGNED]; - } - p = nodes[lp.ptr]; - lp = p[(index >> (i * P_L2_BITS)) & (P_L2_SIZE - 1)]; - } - - if (section_covers_addr(§ions[lp.ptr], addr)) { - return §ions[lp.ptr]; - } else { - return §ions[PHYS_SECTION_UNASSIGNED]; - } -} - -bool memory_region_is_unassigned(MemoryRegion *mr) -{ - return mr != &io_mem_rom && mr != &io_mem_notdirty && !mr->rom_device - && mr != &io_mem_watch; -} - -/* Called from RCU critical section */ -static MemoryRegionSection *address_space_lookup_region(AddressSpaceDispatch *d, - hwaddr addr, - bool resolve_subpage) -{ - MemoryRegionSection *section = atomic_read(&d->mru_section); - subpage_t *subpage; - bool update; - - if (section && section != &d->map.sections[PHYS_SECTION_UNASSIGNED] && - section_covers_addr(section, addr)) { - update = false; - } else { - section = phys_page_find(d->phys_map, addr, d->map.nodes, - d->map.sections); - update = true; - } - if (resolve_subpage && section->mr->subpage) { - subpage = container_of(section->mr, subpage_t, iomem); - section = &d->map.sections[subpage->sub_section[SUBPAGE_IDX(addr)]]; - } - if (update) { - atomic_set(&d->mru_section, section); - } - return section; -} - -/* Called from RCU critical section */ -static MemoryRegionSection * -address_space_translate_internal(AddressSpaceDispatch *d, hwaddr addr, hwaddr *xlat, - hwaddr *plen, bool resolve_subpage) -{ - MemoryRegionSection *section; - MemoryRegion *mr; - Int128 diff; - - section = address_space_lookup_region(d, addr, resolve_subpage); - /* Compute offset within MemoryRegionSection */ - addr -= section->offset_within_address_space; - - /* Compute offset within MemoryRegion */ - *xlat = addr + section->offset_within_region; - - mr = section->mr; - - /* MMIO registers can be expected to perform full-width accesses based only - * on their address, without considering adjacent registers that could - * decode to completely different MemoryRegions. When such registers - * exist (e.g. I/O ports 0xcf8 and 0xcf9 on most PC chipsets), MMIO - * regions overlap wildly. For this reason we cannot clamp the accesses - * here. - * - * If the length is small (as is the case for address_space_ldl/stl), - * everything works fine. If the incoming length is large, however, - * the caller really has to do the clamping through memory_access_size. - */ - if (memory_region_is_ram(mr)) { - diff = int128_sub(section->size, int128_make64(addr)); - *plen = int128_get64(int128_min(diff, int128_make64(*plen))); - } - return section; -} - -/* Called from RCU critical section */ -MemoryRegion *address_space_translate(AddressSpace *as, hwaddr addr, - hwaddr *xlat, hwaddr *plen, - bool is_write) -{ - IOMMUTLBEntry iotlb; - MemoryRegionSection *section; - MemoryRegion *mr; - - for (;;) { - AddressSpaceDispatch *d = atomic_rcu_read(&as->dispatch); - section = address_space_translate_internal(d, addr, &addr, plen, true); - mr = section->mr; - - if (!mr->iommu_ops) { - break; - } - - iotlb = mr->iommu_ops->translate(mr, addr, is_write); - addr = ((iotlb.translated_addr & ~iotlb.addr_mask) - | (addr & iotlb.addr_mask)); - *plen = MIN(*plen, (addr | iotlb.addr_mask) - addr + 1); - if (!(iotlb.perm & (1 << is_write))) { - mr = &io_mem_unassigned; - break; - } - - as = iotlb.target_as; - } - - if (xen_enabled() && memory_access_is_direct(mr, is_write)) { - hwaddr page = ((addr & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE) - addr; - *plen = MIN(page, *plen); - } - - *xlat = addr; - return mr; -} - -/* Called from RCU critical section */ -MemoryRegionSection * -address_space_translate_for_iotlb(CPUState *cpu, int asidx, hwaddr addr, - hwaddr *xlat, hwaddr *plen) -{ - MemoryRegionSection *section; - AddressSpaceDispatch *d = cpu->cpu_ases[asidx].memory_dispatch; - - section = address_space_translate_internal(d, addr, xlat, plen, false); - - assert(!section->mr->iommu_ops); - return section; -} -#endif - -#if !defined(CONFIG_USER_ONLY) - -static int cpu_common_post_load(void *opaque, int version_id) -{ - CPUState *cpu = opaque; - - /* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the - version_id is increased. */ - cpu->interrupt_request &= ~0x01; - tlb_flush(cpu, 1); - - return 0; -} - -static int cpu_common_pre_load(void *opaque) -{ - CPUState *cpu = opaque; - - cpu->exception_index = -1; - - return 0; -} - -static bool cpu_common_exception_index_needed(void *opaque) -{ - CPUState *cpu = opaque; - - return tcg_enabled() && cpu->exception_index != -1; -} - -static const VMStateDescription vmstate_cpu_common_exception_index = { - .name = "cpu_common/exception_index", - .version_id = 1, - .minimum_version_id = 1, - .needed = cpu_common_exception_index_needed, - .fields = (VMStateField[]) { - VMSTATE_INT32(exception_index, CPUState), - VMSTATE_END_OF_LIST() - } -}; - -static bool cpu_common_crash_occurred_needed(void *opaque) -{ - CPUState *cpu = opaque; - - return cpu->crash_occurred; -} - -static const VMStateDescription vmstate_cpu_common_crash_occurred = { - .name = "cpu_common/crash_occurred", - .version_id = 1, - .minimum_version_id = 1, - .needed = cpu_common_crash_occurred_needed, - .fields = (VMStateField[]) { - VMSTATE_BOOL(crash_occurred, CPUState), - VMSTATE_END_OF_LIST() - } -}; - -const VMStateDescription vmstate_cpu_common = { - .name = "cpu_common", - .version_id = 1, - .minimum_version_id = 1, - .pre_load = cpu_common_pre_load, - .post_load = cpu_common_post_load, - .fields = (VMStateField[]) { - VMSTATE_UINT32(halted, CPUState), - VMSTATE_UINT32(interrupt_request, CPUState), - VMSTATE_END_OF_LIST() - }, - .subsections = (const VMStateDescription*[]) { - &vmstate_cpu_common_exception_index, - &vmstate_cpu_common_crash_occurred, - NULL - } -}; - -#endif - -CPUState *qemu_get_cpu(int index) -{ - CPUState *cpu; - - CPU_FOREACH(cpu) { - if (cpu->cpu_index == index) { - return cpu; - } - } - - return NULL; -} - -#if !defined(CONFIG_USER_ONLY) -void cpu_address_space_init(CPUState *cpu, AddressSpace *as, int asidx) -{ - CPUAddressSpace *newas; - - /* Target code should have set num_ases before calling us */ - assert(asidx < cpu->num_ases); - - if (asidx == 0) { - /* address space 0 gets the convenience alias */ - cpu->as = as; - } - - /* KVM cannot currently support multiple address spaces. */ - assert(asidx == 0 || !kvm_enabled()); - - if (!cpu->cpu_ases) { - cpu->cpu_ases = g_new0(CPUAddressSpace, cpu->num_ases); - } - - newas = &cpu->cpu_ases[asidx]; - newas->cpu = cpu; - newas->as = as; - if (tcg_enabled()) { - newas->tcg_as_listener.commit = tcg_commit; - memory_listener_register(&newas->tcg_as_listener, as); - } -} - -AddressSpace *cpu_get_address_space(CPUState *cpu, int asidx) -{ - /* Return the AddressSpace corresponding to the specified index */ - return cpu->cpu_ases[asidx].as; -} -#endif - -#ifndef CONFIG_USER_ONLY -static DECLARE_BITMAP(cpu_index_map, MAX_CPUMASK_BITS); - -static int cpu_get_free_index(Error **errp) -{ - int cpu = find_first_zero_bit(cpu_index_map, MAX_CPUMASK_BITS); - - if (cpu >= MAX_CPUMASK_BITS) { - error_setg(errp, "Trying to use more CPUs than max of %d", - MAX_CPUMASK_BITS); - return -1; - } - - bitmap_set(cpu_index_map, cpu, 1); - return cpu; -} - -void cpu_exec_exit(CPUState *cpu) -{ - if (cpu->cpu_index == -1) { - /* cpu_index was never allocated by this @cpu or was already freed. */ - return; - } - - bitmap_clear(cpu_index_map, cpu->cpu_index, 1); - cpu->cpu_index = -1; -} -#else - -static int cpu_get_free_index(Error **errp) -{ - CPUState *some_cpu; - int cpu_index = 0; - - CPU_FOREACH(some_cpu) { - cpu_index++; - } - return cpu_index; -} - -void cpu_exec_exit(CPUState *cpu) -{ -} -#endif - -void cpu_exec_init(CPUState *cpu, Error **errp) -{ - CPUClass *cc = CPU_GET_CLASS(cpu); - int cpu_index; - Error *local_err = NULL; - - cpu->as = NULL; - cpu->num_ases = 0; - -#ifndef CONFIG_USER_ONLY - cpu->thread_id = qemu_get_thread_id(); - - /* This is a softmmu CPU object, so create a property for it - * so users can wire up its memory. (This can't go in qom/cpu.c - * because that file is compiled only once for both user-mode - * and system builds.) The default if no link is set up is to use - * the system address space. - */ - object_property_add_link(OBJECT(cpu), "memory", TYPE_MEMORY_REGION, - (Object **)&cpu->memory, - qdev_prop_allow_set_link_before_realize, - OBJ_PROP_LINK_UNREF_ON_RELEASE, - &error_abort); - cpu->memory = system_memory; - object_ref(OBJECT(cpu->memory)); -#endif - -#if defined(CONFIG_USER_ONLY) - cpu_list_lock(); -#endif - cpu_index = cpu->cpu_index = cpu_get_free_index(&local_err); - if (local_err) { - error_propagate(errp, local_err); -#if defined(CONFIG_USER_ONLY) - cpu_list_unlock(); -#endif - return; - } - QTAILQ_INSERT_TAIL(&cpus, cpu, node); -#if defined(CONFIG_USER_ONLY) - cpu_list_unlock(); -#endif - if (qdev_get_vmsd(DEVICE(cpu)) == NULL) { - vmstate_register(NULL, cpu_index, &vmstate_cpu_common, cpu); - } - if (cc->vmsd != NULL) { - vmstate_register(NULL, cpu_index, cc->vmsd, cpu); - } -} - -#if defined(CONFIG_USER_ONLY) -static void breakpoint_invalidate(CPUState *cpu, target_ulong pc) -{ - tb_invalidate_phys_page_range(pc, pc + 1, 0); -} -#else -static void breakpoint_invalidate(CPUState *cpu, target_ulong pc) -{ - MemTxAttrs attrs; - hwaddr phys = cpu_get_phys_page_attrs_debug(cpu, pc, &attrs); - int asidx = cpu_asidx_from_attrs(cpu, attrs); - if (phys != -1) { - tb_invalidate_phys_addr(cpu->cpu_ases[asidx].as, - phys | (pc & ~TARGET_PAGE_MASK)); - } -} -#endif - -#if defined(CONFIG_USER_ONLY) -void cpu_watchpoint_remove_all(CPUState *cpu, int mask) - -{ -} - -int cpu_watchpoint_remove(CPUState *cpu, vaddr addr, vaddr len, - int flags) -{ - return -ENOSYS; -} - -void cpu_watchpoint_remove_by_ref(CPUState *cpu, CPUWatchpoint *watchpoint) -{ -} - -int cpu_watchpoint_insert(CPUState *cpu, vaddr addr, vaddr len, - int flags, CPUWatchpoint **watchpoint) -{ - return -ENOSYS; -} -#else -/* Add a watchpoint. */ -int cpu_watchpoint_insert(CPUState *cpu, vaddr addr, vaddr len, - int flags, CPUWatchpoint **watchpoint) -{ - CPUWatchpoint *wp; - - /* forbid ranges which are empty or run off the end of the address space */ - if (len == 0 || (addr + len - 1) < addr) { - error_report("tried to set invalid watchpoint at %" - VADDR_PRIx ", len=%" VADDR_PRIu, addr, len); - return -EINVAL; - } - wp = g_malloc(sizeof(*wp)); - - wp->vaddr = addr; - wp->len = len; - wp->flags = flags; - - /* keep all GDB-injected watchpoints in front */ - if (flags & BP_GDB) { - QTAILQ_INSERT_HEAD(&cpu->watchpoints, wp, entry); - } else { - QTAILQ_INSERT_TAIL(&cpu->watchpoints, wp, entry); - } - - tlb_flush_page(cpu, addr); - - if (watchpoint) - *watchpoint = wp; - return 0; -} - -/* Remove a specific watchpoint. */ -int cpu_watchpoint_remove(CPUState *cpu, vaddr addr, vaddr len, - int flags) -{ - CPUWatchpoint *wp; - - QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) { - if (addr == wp->vaddr && len == wp->len - && flags == (wp->flags & ~BP_WATCHPOINT_HIT)) { - cpu_watchpoint_remove_by_ref(cpu, wp); - return 0; - } - } - return -ENOENT; -} - -/* Remove a specific watchpoint by reference. */ -void cpu_watchpoint_remove_by_ref(CPUState *cpu, CPUWatchpoint *watchpoint) -{ - QTAILQ_REMOVE(&cpu->watchpoints, watchpoint, entry); - - tlb_flush_page(cpu, watchpoint->vaddr); - - g_free(watchpoint); -} - -/* Remove all matching watchpoints. */ -void cpu_watchpoint_remove_all(CPUState *cpu, int mask) -{ - CPUWatchpoint *wp, *next; - - QTAILQ_FOREACH_SAFE(wp, &cpu->watchpoints, entry, next) { - if (wp->flags & mask) { - cpu_watchpoint_remove_by_ref(cpu, wp); - } - } -} - -/* Return true if this watchpoint address matches the specified - * access (ie the address range covered by the watchpoint overlaps - * partially or completely with the address range covered by the - * access). - */ -static inline bool cpu_watchpoint_address_matches(CPUWatchpoint *wp, - vaddr addr, - vaddr len) -{ - /* We know the lengths are non-zero, but a little caution is - * required to avoid errors in the case where the range ends - * exactly at the top of the address space and so addr + len - * wraps round to zero. - */ - vaddr wpend = wp->vaddr + wp->len - 1; - vaddr addrend = addr + len - 1; - - return !(addr > wpend || wp->vaddr > addrend); -} - -#endif - -/* Add a breakpoint. */ -int cpu_breakpoint_insert(CPUState *cpu, vaddr pc, int flags, - CPUBreakpoint **breakpoint) -{ - CPUBreakpoint *bp; - - bp = g_malloc(sizeof(*bp)); - - bp->pc = pc; - bp->flags = flags; - - /* keep all GDB-injected breakpoints in front */ - if (flags & BP_GDB) { - QTAILQ_INSERT_HEAD(&cpu->breakpoints, bp, entry); - } else { - QTAILQ_INSERT_TAIL(&cpu->breakpoints, bp, entry); - } - - breakpoint_invalidate(cpu, pc); - - if (breakpoint) { - *breakpoint = bp; - } - return 0; -} - -/* Remove a specific breakpoint. */ -int cpu_breakpoint_remove(CPUState *cpu, vaddr pc, int flags) -{ - CPUBreakpoint *bp; - - QTAILQ_FOREACH(bp, &cpu->breakpoints, entry) { - if (bp->pc == pc && bp->flags == flags) { - cpu_breakpoint_remove_by_ref(cpu, bp); - return 0; - } - } - return -ENOENT; -} - -/* Remove a specific breakpoint by reference. */ -void cpu_breakpoint_remove_by_ref(CPUState *cpu, CPUBreakpoint *breakpoint) -{ - QTAILQ_REMOVE(&cpu->breakpoints, breakpoint, entry); - - breakpoint_invalidate(cpu, breakpoint->pc); - - g_free(breakpoint); -} - -/* Remove all matching breakpoints. */ -void cpu_breakpoint_remove_all(CPUState *cpu, int mask) -{ - CPUBreakpoint *bp, *next; - - QTAILQ_FOREACH_SAFE(bp, &cpu->breakpoints, entry, next) { - if (bp->flags & mask) { - cpu_breakpoint_remove_by_ref(cpu, bp); - } - } -} - -/* enable or disable single step mode. EXCP_DEBUG is returned by the - CPU loop after each instruction */ -void cpu_single_step(CPUState *cpu, int enabled) -{ - if (cpu->singlestep_enabled != enabled) { - cpu->singlestep_enabled = enabled; - if (kvm_enabled()) { - kvm_update_guest_debug(cpu, 0); - } else { - /* must flush all the translated code to avoid inconsistencies */ - /* XXX: only flush what is necessary */ - tb_flush(cpu); - } - } -} - -void cpu_abort(CPUState *cpu, const char *fmt, ...) -{ - va_list ap; - va_list ap2; - - va_start(ap, fmt); - va_copy(ap2, ap); - fprintf(stderr, "qemu: fatal: "); - vfprintf(stderr, fmt, ap); - fprintf(stderr, "\n"); - cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_FPU | CPU_DUMP_CCOP); - if (qemu_log_separate()) { - qemu_log("qemu: fatal: "); - qemu_log_vprintf(fmt, ap2); - qemu_log("\n"); - log_cpu_state(cpu, CPU_DUMP_FPU | CPU_DUMP_CCOP); - qemu_log_flush(); - qemu_log_close(); - } - va_end(ap2); - va_end(ap); - replay_finish(); -#if defined(CONFIG_USER_ONLY) - { - struct sigaction act; - sigfillset(&act.sa_mask); - act.sa_handler = SIG_DFL; - sigaction(SIGABRT, &act, NULL); - } -#endif - abort(); -} - -#if !defined(CONFIG_USER_ONLY) -/* Called from RCU critical section */ -static RAMBlock *qemu_get_ram_block(ram_addr_t addr) -{ - RAMBlock *block; - - block = atomic_rcu_read(&ram_list.mru_block); - if (block && addr - block->offset < block->max_length) { - return block; - } - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { - if (addr - block->offset < block->max_length) { - goto found; - } - } - - fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr); - abort(); - -found: - /* It is safe to write mru_block outside the iothread lock. This - * is what happens: - * - * mru_block = xxx - * rcu_read_unlock() - * xxx removed from list - * rcu_read_lock() - * read mru_block - * mru_block = NULL; - * call_rcu(reclaim_ramblock, xxx); - * rcu_read_unlock() - * - * atomic_rcu_set is not needed here. The block was already published - * when it was placed into the list. Here we're just making an extra - * copy of the pointer. - */ - ram_list.mru_block = block; - return block; -} - -static void tlb_reset_dirty_range_all(ram_addr_t start, ram_addr_t length) -{ - CPUState *cpu; - ram_addr_t start1; - RAMBlock *block; - ram_addr_t end; - - end = TARGET_PAGE_ALIGN(start + length); - start &= TARGET_PAGE_MASK; - - rcu_read_lock(); - block = qemu_get_ram_block(start); - assert(block == qemu_get_ram_block(end - 1)); - start1 = (uintptr_t)ramblock_ptr(block, start - block->offset); - CPU_FOREACH(cpu) { - tlb_reset_dirty(cpu, start1, length); - } - rcu_read_unlock(); -} - -/* Note: start and end must be within the same ram block. */ -bool cpu_physical_memory_test_and_clear_dirty(ram_addr_t start, - ram_addr_t length, - unsigned client) -{ - DirtyMemoryBlocks *blocks; - unsigned long end, page; - bool dirty = false; - - if (length == 0) { - return false; - } - - end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS; - page = start >> TARGET_PAGE_BITS; - - rcu_read_lock(); - - blocks = atomic_rcu_read(&ram_list.dirty_memory[client]); - - while (page < end) { - unsigned long idx = page / DIRTY_MEMORY_BLOCK_SIZE; - unsigned long offset = page % DIRTY_MEMORY_BLOCK_SIZE; - unsigned long num = MIN(end - page, DIRTY_MEMORY_BLOCK_SIZE - offset); - - dirty |= bitmap_test_and_clear_atomic(blocks->blocks[idx], - offset, num); - page += num; - } - - rcu_read_unlock(); - - if (dirty && tcg_enabled()) { - tlb_reset_dirty_range_all(start, length); - } - - return dirty; -} - -/* Called from RCU critical section */ -hwaddr memory_region_section_get_iotlb(CPUState *cpu, - MemoryRegionSection *section, - target_ulong vaddr, - hwaddr paddr, hwaddr xlat, - int prot, - target_ulong *address) -{ - hwaddr iotlb; - CPUWatchpoint *wp; - - if (memory_region_is_ram(section->mr)) { - /* Normal RAM. */ - iotlb = (memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK) - + xlat; - if (!section->readonly) { - iotlb |= PHYS_SECTION_NOTDIRTY; - } else { - iotlb |= PHYS_SECTION_ROM; - } - } else { - AddressSpaceDispatch *d; - - d = atomic_rcu_read(§ion->address_space->dispatch); - iotlb = section - d->map.sections; - iotlb += xlat; - } - - /* Make accesses to pages with watchpoints go via the - watchpoint trap routines. */ - QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) { - if (cpu_watchpoint_address_matches(wp, vaddr, TARGET_PAGE_SIZE)) { - /* Avoid trapping reads of pages with a write breakpoint. */ - if ((prot & PAGE_WRITE) || (wp->flags & BP_MEM_READ)) { - iotlb = PHYS_SECTION_WATCH + paddr; - *address |= TLB_MMIO; - break; - } - } - } - - return iotlb; -} -#endif /* defined(CONFIG_USER_ONLY) */ - -#if !defined(CONFIG_USER_ONLY) - -static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, - uint16_t section); -static subpage_t *subpage_init(AddressSpace *as, hwaddr base); - -static void *(*phys_mem_alloc)(size_t size, uint64_t *align) = - qemu_anon_ram_alloc; - -/* - * Set a custom physical guest memory alloator. - * Accelerators with unusual needs may need this. Hopefully, we can - * get rid of it eventually. - */ -void phys_mem_set_alloc(void *(*alloc)(size_t, uint64_t *align)) -{ - phys_mem_alloc = alloc; -} - -static uint16_t phys_section_add(PhysPageMap *map, - MemoryRegionSection *section) -{ - /* The physical section number is ORed with a page-aligned - * pointer to produce the iotlb entries. Thus it should - * never overflow into the page-aligned value. - */ - assert(map->sections_nb < TARGET_PAGE_SIZE); - - if (map->sections_nb == map->sections_nb_alloc) { - map->sections_nb_alloc = MAX(map->sections_nb_alloc * 2, 16); - map->sections = g_renew(MemoryRegionSection, map->sections, - map->sections_nb_alloc); - } - map->sections[map->sections_nb] = *section; - memory_region_ref(section->mr); - return map->sections_nb++; -} - -static void phys_section_destroy(MemoryRegion *mr) -{ - bool have_sub_page = mr->subpage; - - memory_region_unref(mr); - - if (have_sub_page) { - subpage_t *subpage = container_of(mr, subpage_t, iomem); - object_unref(OBJECT(&subpage->iomem)); - g_free(subpage); - } -} - -static void phys_sections_free(PhysPageMap *map) -{ - while (map->sections_nb > 0) { - MemoryRegionSection *section = &map->sections[--map->sections_nb]; - phys_section_destroy(section->mr); - } - g_free(map->sections); - g_free(map->nodes); -} - -static void register_subpage(AddressSpaceDispatch *d, MemoryRegionSection *section) -{ - subpage_t *subpage; - hwaddr base = section->offset_within_address_space - & TARGET_PAGE_MASK; - MemoryRegionSection *existing = phys_page_find(d->phys_map, base, - d->map.nodes, d->map.sections); - MemoryRegionSection subsection = { - .offset_within_address_space = base, - .size = int128_make64(TARGET_PAGE_SIZE), - }; - hwaddr start, end; - - assert(existing->mr->subpage || existing->mr == &io_mem_unassigned); - - if (!(existing->mr->subpage)) { - subpage = subpage_init(d->as, base); - subsection.address_space = d->as; - subsection.mr = &subpage->iomem; - phys_page_set(d, base >> TARGET_PAGE_BITS, 1, - phys_section_add(&d->map, &subsection)); - } else { - subpage = container_of(existing->mr, subpage_t, iomem); - } - start = section->offset_within_address_space & ~TARGET_PAGE_MASK; - end = start + int128_get64(section->size) - 1; - subpage_register(subpage, start, end, - phys_section_add(&d->map, section)); -} - - -static void register_multipage(AddressSpaceDispatch *d, - MemoryRegionSection *section) -{ - hwaddr start_addr = section->offset_within_address_space; - uint16_t section_index = phys_section_add(&d->map, section); - uint64_t num_pages = int128_get64(int128_rshift(section->size, - TARGET_PAGE_BITS)); - - assert(num_pages); - phys_page_set(d, start_addr >> TARGET_PAGE_BITS, num_pages, section_index); -} - -static void mem_add(MemoryListener *listener, MemoryRegionSection *section) -{ - AddressSpace *as = container_of(listener, AddressSpace, dispatch_listener); - AddressSpaceDispatch *d = as->next_dispatch; - MemoryRegionSection now = *section, remain = *section; - Int128 page_size = int128_make64(TARGET_PAGE_SIZE); - - if (now.offset_within_address_space & ~TARGET_PAGE_MASK) { - uint64_t left = TARGET_PAGE_ALIGN(now.offset_within_address_space) - - now.offset_within_address_space; - - now.size = int128_min(int128_make64(left), now.size); - register_subpage(d, &now); - } else { - now.size = int128_zero(); - } - while (int128_ne(remain.size, now.size)) { - remain.size = int128_sub(remain.size, now.size); - remain.offset_within_address_space += int128_get64(now.size); - remain.offset_within_region += int128_get64(now.size); - now = remain; - if (int128_lt(remain.size, page_size)) { - register_subpage(d, &now); - } else if (remain.offset_within_address_space & ~TARGET_PAGE_MASK) { - now.size = page_size; - register_subpage(d, &now); - } else { - now.size = int128_and(now.size, int128_neg(page_size)); - register_multipage(d, &now); - } - } -} - -void qemu_flush_coalesced_mmio_buffer(void) -{ - if (kvm_enabled()) - kvm_flush_coalesced_mmio_buffer(); -} - -void qemu_mutex_lock_ramlist(void) -{ - qemu_mutex_lock(&ram_list.mutex); -} - -void qemu_mutex_unlock_ramlist(void) -{ - qemu_mutex_unlock(&ram_list.mutex); -} - -#ifdef __linux__ -static void *file_ram_alloc(RAMBlock *block, - ram_addr_t memory, - const char *path, - Error **errp) -{ - bool unlink_on_error = false; - char *filename; - char *sanitized_name; - char *c; - void *area; - int fd = -1; - int64_t page_size; - - if (kvm_enabled() && !kvm_has_sync_mmu()) { - error_setg(errp, - "host lacks kvm mmu notifiers, -mem-path unsupported"); - return NULL; - } - - for (;;) { - fd = open(path, O_RDWR); - if (fd >= 0) { - /* @path names an existing file, use it */ - break; - } - if (errno == ENOENT) { - /* @path names a file that doesn't exist, create it */ - fd = open(path, O_RDWR | O_CREAT | O_EXCL, 0644); - if (fd >= 0) { - unlink_on_error = true; - break; - } - } else if (errno == EISDIR) { - /* @path names a directory, create a file there */ - /* Make name safe to use with mkstemp by replacing '/' with '_'. */ - sanitized_name = g_strdup(memory_region_name(block->mr)); - for (c = sanitized_name; *c != '\0'; c++) { - if (*c == '/') { - *c = '_'; - } - } - - filename = g_strdup_printf("%s/qemu_back_mem.%s.XXXXXX", path, - sanitized_name); - g_free(sanitized_name); - - fd = mkstemp(filename); - if (fd >= 0) { - unlink(filename); - g_free(filename); - break; - } - g_free(filename); - } - if (errno != EEXIST && errno != EINTR) { - error_setg_errno(errp, errno, - "can't open backing store %s for guest RAM", - path); - goto error; - } - /* - * Try again on EINTR and EEXIST. The latter happens when - * something else creates the file between our two open(). - */ - } - - page_size = qemu_fd_getpagesize(fd); - block->mr->align = page_size; - - if (memory < page_size) { - error_setg(errp, "memory size 0x" RAM_ADDR_FMT " must be equal to " - "or larger than page size 0x%" PRIx64, - memory, page_size); - goto error; - } - - memory = ROUND_UP(memory, page_size); - - /* - * ftruncate is not supported by hugetlbfs in older - * hosts, so don't bother bailing out on errors. - * If anything goes wrong with it under other filesystems, - * mmap will fail. - */ - if (ftruncate(fd, memory)) { - perror("ftruncate"); - } - - area = qemu_ram_mmap(fd, memory, page_size, block->flags & RAM_SHARED); - if (area == MAP_FAILED) { - error_setg_errno(errp, errno, - "unable to map backing store for guest RAM"); - goto error; - } - - if (mem_prealloc) { - os_mem_prealloc(fd, area, memory); - } - - block->fd = fd; - return area; - -error: - if (unlink_on_error) { - unlink(path); - } - if (fd != -1) { - close(fd); - } - return NULL; -} -#endif - -/* Called with the ramlist lock held. */ -static ram_addr_t find_ram_offset(ram_addr_t size) -{ - RAMBlock *block, *next_block; - ram_addr_t offset = RAM_ADDR_MAX, mingap = RAM_ADDR_MAX; - - assert(size != 0); /* it would hand out same offset multiple times */ - - if (QLIST_EMPTY_RCU(&ram_list.blocks)) { - return 0; - } - - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { - ram_addr_t end, next = RAM_ADDR_MAX; - - end = block->offset + block->max_length; - - QLIST_FOREACH_RCU(next_block, &ram_list.blocks, next) { - if (next_block->offset >= end) { - next = MIN(next, next_block->offset); - } - } - if (next - end >= size && next - end < mingap) { - offset = end; - mingap = next - end; - } - } - - if (offset == RAM_ADDR_MAX) { - fprintf(stderr, "Failed to find gap of requested size: %" PRIu64 "\n", - (uint64_t)size); - abort(); - } - - return offset; -} - -ram_addr_t last_ram_offset(void) -{ - RAMBlock *block; - ram_addr_t last = 0; - - rcu_read_lock(); - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { - last = MAX(last, block->offset + block->max_length); - } - rcu_read_unlock(); - return last; -} - -static void qemu_ram_setup_dump(void *addr, ram_addr_t size) -{ - int ret; - - /* Use MADV_DONTDUMP, if user doesn't want the guest memory in the core */ - if (!machine_dump_guest_core(current_machine)) { - ret = qemu_madvise(addr, size, QEMU_MADV_DONTDUMP); - if (ret) { - perror("qemu_madvise"); - fprintf(stderr, "madvise doesn't support MADV_DONTDUMP, " - "but dump_guest_core=off specified\n"); - } - } -} - -/* Called within an RCU critical section, or while the ramlist lock - * is held. - */ -static RAMBlock *find_ram_block(ram_addr_t addr) -{ - RAMBlock *block; - - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { - if (block->offset == addr) { - return block; - } - } - - return NULL; -} - -const char *qemu_ram_get_idstr(RAMBlock *rb) -{ - return rb->idstr; -} - -/* Called with iothread lock held. */ -void qemu_ram_set_idstr(ram_addr_t addr, const char *name, DeviceState *dev) -{ - RAMBlock *new_block, *block; - - rcu_read_lock(); - new_block = find_ram_block(addr); - assert(new_block); - assert(!new_block->idstr[0]); - - if (dev) { - char *id = qdev_get_dev_path(dev); - if (id) { - snprintf(new_block->idstr, sizeof(new_block->idstr), "%s/", id); - g_free(id); - } - } - pstrcat(new_block->idstr, sizeof(new_block->idstr), name); - - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { - if (block != new_block && !strcmp(block->idstr, new_block->idstr)) { - fprintf(stderr, "RAMBlock \"%s\" already registered, abort!\n", - new_block->idstr); - abort(); - } - } - rcu_read_unlock(); -} - -/* Called with iothread lock held. */ -void qemu_ram_unset_idstr(ram_addr_t addr) -{ - RAMBlock *block; - - /* FIXME: arch_init.c assumes that this is not called throughout - * migration. Ignore the problem since hot-unplug during migration - * does not work anyway. - */ - - rcu_read_lock(); - block = find_ram_block(addr); - if (block) { - memset(block->idstr, 0, sizeof(block->idstr)); - } - rcu_read_unlock(); -} - -static int memory_try_enable_merging(void *addr, size_t len) -{ - if (!machine_mem_merge(current_machine)) { - /* disabled by the user */ - return 0; - } - - return qemu_madvise(addr, len, QEMU_MADV_MERGEABLE); -} - -/* Only legal before guest might have detected the memory size: e.g. on - * incoming migration, or right after reset. - * - * As memory core doesn't know how is memory accessed, it is up to - * resize callback to update device state and/or add assertions to detect - * misuse, if necessary. - */ -int qemu_ram_resize(ram_addr_t base, ram_addr_t newsize, Error **errp) -{ - RAMBlock *block = find_ram_block(base); - - assert(block); - - newsize = HOST_PAGE_ALIGN(newsize); - - if (block->used_length == newsize) { - return 0; - } - - if (!(block->flags & RAM_RESIZEABLE)) { - error_setg_errno(errp, EINVAL, - "Length mismatch: %s: 0x" RAM_ADDR_FMT - " in != 0x" RAM_ADDR_FMT, block->idstr, - newsize, block->used_length); - return -EINVAL; - } - - if (block->max_length < newsize) { - error_setg_errno(errp, EINVAL, - "Length too large: %s: 0x" RAM_ADDR_FMT - " > 0x" RAM_ADDR_FMT, block->idstr, - newsize, block->max_length); - return -EINVAL; - } - - cpu_physical_memory_clear_dirty_range(block->offset, block->used_length); - block->used_length = newsize; - cpu_physical_memory_set_dirty_range(block->offset, block->used_length, - DIRTY_CLIENTS_ALL); - memory_region_set_size(block->mr, newsize); - if (block->resized) { - block->resized(block->idstr, newsize, block->host); - } - return 0; -} - -/* Called with ram_list.mutex held */ -static void dirty_memory_extend(ram_addr_t old_ram_size, - ram_addr_t new_ram_size) -{ - ram_addr_t old_num_blocks = DIV_ROUND_UP(old_ram_size, - DIRTY_MEMORY_BLOCK_SIZE); - ram_addr_t new_num_blocks = DIV_ROUND_UP(new_ram_size, - DIRTY_MEMORY_BLOCK_SIZE); - int i; - - /* Only need to extend if block count increased */ - if (new_num_blocks <= old_num_blocks) { - return; - } - - for (i = 0; i < DIRTY_MEMORY_NUM; i++) { - DirtyMemoryBlocks *old_blocks; - DirtyMemoryBlocks *new_blocks; - int j; - - old_blocks = atomic_rcu_read(&ram_list.dirty_memory[i]); - new_blocks = g_malloc(sizeof(*new_blocks) + - sizeof(new_blocks->blocks[0]) * new_num_blocks); - - if (old_num_blocks) { - memcpy(new_blocks->blocks, old_blocks->blocks, - old_num_blocks * sizeof(old_blocks->blocks[0])); - } - - for (j = old_num_blocks; j < new_num_blocks; j++) { - new_blocks->blocks[j] = bitmap_new(DIRTY_MEMORY_BLOCK_SIZE); - } - - atomic_rcu_set(&ram_list.dirty_memory[i], new_blocks); - - if (old_blocks) { - g_free_rcu(old_blocks, rcu); - } - } -} - -static void ram_block_add(RAMBlock *new_block, Error **errp) -{ - RAMBlock *block; - RAMBlock *last_block = NULL; - ram_addr_t old_ram_size, new_ram_size; - Error *err = NULL; - - old_ram_size = last_ram_offset() >> TARGET_PAGE_BITS; - - qemu_mutex_lock_ramlist(); - new_block->offset = find_ram_offset(new_block->max_length); - - if (!new_block->host) { - if (xen_enabled()) { - xen_ram_alloc(new_block->offset, new_block->max_length, - new_block->mr, &err); - if (err) { - error_propagate(errp, err); - qemu_mutex_unlock_ramlist(); - return; - } - } else { - new_block->host = phys_mem_alloc(new_block->max_length, - &new_block->mr->align); - if (!new_block->host) { - error_setg_errno(errp, errno, - "cannot set up guest memory '%s'", - memory_region_name(new_block->mr)); - qemu_mutex_unlock_ramlist(); - return; - } - memory_try_enable_merging(new_block->host, new_block->max_length); - } - } - - new_ram_size = MAX(old_ram_size, - (new_block->offset + new_block->max_length) >> TARGET_PAGE_BITS); - if (new_ram_size > old_ram_size) { - migration_bitmap_extend(old_ram_size, new_ram_size); - dirty_memory_extend(old_ram_size, new_ram_size); - } - /* Keep the list sorted from biggest to smallest block. Unlike QTAILQ, - * QLIST (which has an RCU-friendly variant) does not have insertion at - * tail, so save the last element in last_block. - */ - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { - last_block = block; - if (block->max_length < new_block->max_length) { - break; - } - } - if (block) { - QLIST_INSERT_BEFORE_RCU(block, new_block, next); - } else if (last_block) { - QLIST_INSERT_AFTER_RCU(last_block, new_block, next); - } else { /* list is empty */ - QLIST_INSERT_HEAD_RCU(&ram_list.blocks, new_block, next); - } - ram_list.mru_block = NULL; - - /* Write list before version */ - smp_wmb(); - ram_list.version++; - qemu_mutex_unlock_ramlist(); - - cpu_physical_memory_set_dirty_range(new_block->offset, - new_block->used_length, - DIRTY_CLIENTS_ALL); - - if (new_block->host) { - qemu_ram_setup_dump(new_block->host, new_block->max_length); - qemu_madvise(new_block->host, new_block->max_length, QEMU_MADV_HUGEPAGE); - qemu_madvise(new_block->host, new_block->max_length, QEMU_MADV_DONTFORK); - if (kvm_enabled()) { - kvm_setup_guest_memory(new_block->host, new_block->max_length); - } - } -} - -#ifdef __linux__ -RAMBlock *qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr, - bool share, const char *mem_path, - Error **errp) -{ - RAMBlock *new_block; - Error *local_err = NULL; - - if (xen_enabled()) { - error_setg(errp, "-mem-path not supported with Xen"); - return NULL; - } - - if (phys_mem_alloc != qemu_anon_ram_alloc) { - /* - * file_ram_alloc() needs to allocate just like - * phys_mem_alloc, but we haven't bothered to provide - * a hook there. - */ - error_setg(errp, - "-mem-path not supported with this accelerator"); - return NULL; - } - - size = HOST_PAGE_ALIGN(size); - new_block = g_malloc0(sizeof(*new_block)); - new_block->mr = mr; - new_block->used_length = size; - new_block->max_length = size; - new_block->flags = share ? RAM_SHARED : 0; - new_block->host = file_ram_alloc(new_block, size, - mem_path, errp); - if (!new_block->host) { - g_free(new_block); - return NULL; - } - - ram_block_add(new_block, &local_err); - if (local_err) { - g_free(new_block); - error_propagate(errp, local_err); - return NULL; - } - return new_block; -} -#endif - -static -RAMBlock *qemu_ram_alloc_internal(ram_addr_t size, ram_addr_t max_size, - void (*resized)(const char*, - uint64_t length, - void *host), - void *host, bool resizeable, - MemoryRegion *mr, Error **errp) -{ - RAMBlock *new_block; - Error *local_err = NULL; - - size = HOST_PAGE_ALIGN(size); - max_size = HOST_PAGE_ALIGN(max_size); - new_block = g_malloc0(sizeof(*new_block)); - new_block->mr = mr; - new_block->resized = resized; - new_block->used_length = size; - new_block->max_length = max_size; - assert(max_size >= size); - new_block->fd = -1; - new_block->host = host; - if (host) { - new_block->flags |= RAM_PREALLOC; - } - if (resizeable) { - new_block->flags |= RAM_RESIZEABLE; - } - ram_block_add(new_block, &local_err); - if (local_err) { - g_free(new_block); - error_propagate(errp, local_err); - return NULL; - } - return new_block; -} - -RAMBlock *qemu_ram_alloc_from_ptr(ram_addr_t size, void *host, - MemoryRegion *mr, Error **errp) -{ - return qemu_ram_alloc_internal(size, size, NULL, host, false, mr, errp); -} - -RAMBlock *qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr, Error **errp) -{ - return qemu_ram_alloc_internal(size, size, NULL, NULL, false, mr, errp); -} - -RAMBlock *qemu_ram_alloc_resizeable(ram_addr_t size, ram_addr_t maxsz, - void (*resized)(const char*, - uint64_t length, - void *host), - MemoryRegion *mr, Error **errp) -{ - return qemu_ram_alloc_internal(size, maxsz, resized, NULL, true, mr, errp); -} - -static void reclaim_ramblock(RAMBlock *block) -{ - if (block->flags & RAM_PREALLOC) { - ; - } else if (xen_enabled()) { - xen_invalidate_map_cache_entry(block->host); -#ifndef _WIN32 - } else if (block->fd >= 0) { - qemu_ram_munmap(block->host, block->max_length); - close(block->fd); -#endif - } else { - qemu_anon_ram_free(block->host, block->max_length); - } - g_free(block); -} - -void qemu_ram_free(RAMBlock *block) -{ - if (!block) { - return; - } - - qemu_mutex_lock_ramlist(); - QLIST_REMOVE_RCU(block, next); - ram_list.mru_block = NULL; - /* Write list before version */ - smp_wmb(); - ram_list.version++; - call_rcu(block, reclaim_ramblock, rcu); - qemu_mutex_unlock_ramlist(); -} - -#ifndef _WIN32 -void qemu_ram_remap(ram_addr_t addr, ram_addr_t length) -{ - RAMBlock *block; - ram_addr_t offset; - int flags; - void *area, *vaddr; - - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { - offset = addr - block->offset; - if (offset < block->max_length) { - vaddr = ramblock_ptr(block, offset); - if (block->flags & RAM_PREALLOC) { - ; - } else if (xen_enabled()) { - abort(); - } else { - flags = MAP_FIXED; - if (block->fd >= 0) { - flags |= (block->flags & RAM_SHARED ? - MAP_SHARED : MAP_PRIVATE); - area = mmap(vaddr, length, PROT_READ | PROT_WRITE, - flags, block->fd, offset); - } else { - /* - * Remap needs to match alloc. Accelerators that - * set phys_mem_alloc never remap. If they did, - * we'd need a remap hook here. - */ - assert(phys_mem_alloc == qemu_anon_ram_alloc); - - flags |= MAP_PRIVATE | MAP_ANONYMOUS; - area = mmap(vaddr, length, PROT_READ | PROT_WRITE, - flags, -1, 0); - } - if (area != vaddr) { - fprintf(stderr, "Could not remap addr: " - RAM_ADDR_FMT "@" RAM_ADDR_FMT "\n", - length, addr); - exit(1); - } - memory_try_enable_merging(vaddr, length); - qemu_ram_setup_dump(vaddr, length); - } - } - } -} -#endif /* !_WIN32 */ - -int qemu_get_ram_fd(ram_addr_t addr) -{ - RAMBlock *block; - int fd; - - rcu_read_lock(); - block = qemu_get_ram_block(addr); - fd = block->fd; - rcu_read_unlock(); - return fd; -} - -void qemu_set_ram_fd(ram_addr_t addr, int fd) -{ - RAMBlock *block; - - rcu_read_lock(); - block = qemu_get_ram_block(addr); - block->fd = fd; - rcu_read_unlock(); -} - -void *qemu_get_ram_block_host_ptr(ram_addr_t addr) -{ - RAMBlock *block; - void *ptr; - - rcu_read_lock(); - block = qemu_get_ram_block(addr); - ptr = ramblock_ptr(block, 0); - rcu_read_unlock(); - return ptr; -} - -/* Return a host pointer to ram allocated with qemu_ram_alloc. - * This should not be used for general purpose DMA. Use address_space_map - * or address_space_rw instead. For local memory (e.g. video ram) that the - * device owns, use memory_region_get_ram_ptr. - * - * Called within RCU critical section. - */ -void *qemu_get_ram_ptr(RAMBlock *ram_block, ram_addr_t addr) -{ - RAMBlock *block = ram_block; - - if (block == NULL) { - block = qemu_get_ram_block(addr); - } - - if (xen_enabled() && block->host == NULL) { - /* We need to check if the requested address is in the RAM - * because we don't want to map the entire memory in QEMU. - * In that case just map until the end of the page. - */ - if (block->offset == 0) { - return xen_map_cache(addr, 0, 0); - } - - block->host = xen_map_cache(block->offset, block->max_length, 1); - } - return ramblock_ptr(block, addr - block->offset); -} - -/* Return a host pointer to guest's ram. Similar to qemu_get_ram_ptr - * but takes a size argument. - * - * Called within RCU critical section. - */ -static void *qemu_ram_ptr_length(RAMBlock *ram_block, ram_addr_t addr, - hwaddr *size) -{ - RAMBlock *block = ram_block; - ram_addr_t offset_inside_block; - if (*size == 0) { - return NULL; - } - - if (block == NULL) { - block = qemu_get_ram_block(addr); - } - offset_inside_block = addr - block->offset; - *size = MIN(*size, block->max_length - offset_inside_block); - - if (xen_enabled() && block->host == NULL) { - /* We need to check if the requested address is in the RAM - * because we don't want to map the entire memory in QEMU. - * In that case just map the requested area. - */ - if (block->offset == 0) { - return xen_map_cache(addr, *size, 1); - } - - block->host = xen_map_cache(block->offset, block->max_length, 1); - } - - return ramblock_ptr(block, offset_inside_block); -} - -/* - * Translates a host ptr back to a RAMBlock, a ram_addr and an offset - * in that RAMBlock. - * - * ptr: Host pointer to look up - * round_offset: If true round the result offset down to a page boundary - * *ram_addr: set to result ram_addr - * *offset: set to result offset within the RAMBlock - * - * Returns: RAMBlock (or NULL if not found) - * - * By the time this function returns, the returned pointer is not protected - * by RCU anymore. If the caller is not within an RCU critical section and - * does not hold the iothread lock, it must have other means of protecting the - * pointer, such as a reference to the region that includes the incoming - * ram_addr_t. - */ -RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset, - ram_addr_t *ram_addr, - ram_addr_t *offset) -{ - RAMBlock *block; - uint8_t *host = ptr; - - if (xen_enabled()) { - rcu_read_lock(); - *ram_addr = xen_ram_addr_from_mapcache(ptr); - block = qemu_get_ram_block(*ram_addr); - if (block) { - *offset = (host - block->host); - } - rcu_read_unlock(); - return block; - } - - rcu_read_lock(); - block = atomic_rcu_read(&ram_list.mru_block); - if (block && block->host && host - block->host < block->max_length) { - goto found; - } - - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { - /* This case append when the block is not mapped. */ - if (block->host == NULL) { - continue; - } - if (host - block->host < block->max_length) { - goto found; - } - } - - rcu_read_unlock(); - return NULL; - -found: - *offset = (host - block->host); - if (round_offset) { - *offset &= TARGET_PAGE_MASK; - } - *ram_addr = block->offset + *offset; - rcu_read_unlock(); - return block; -} - -/* - * Finds the named RAMBlock - * - * name: The name of RAMBlock to find - * - * Returns: RAMBlock (or NULL if not found) - */ -RAMBlock *qemu_ram_block_by_name(const char *name) -{ - RAMBlock *block; - - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { - if (!strcmp(name, block->idstr)) { - return block; - } - } - - return NULL; -} - -/* Some of the softmmu routines need to translate from a host pointer - (typically a TLB entry) back to a ram offset. */ -MemoryRegion *qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr) -{ - RAMBlock *block; - ram_addr_t offset; /* Not used */ - - block = qemu_ram_block_from_host(ptr, false, ram_addr, &offset); - - if (!block) { - return NULL; - } - - return block->mr; -} - -/* Called within RCU critical section. */ -static void notdirty_mem_write(void *opaque, hwaddr ram_addr, - uint64_t val, unsigned size) -{ - if (!cpu_physical_memory_get_dirty_flag(ram_addr, DIRTY_MEMORY_CODE)) { - tb_invalidate_phys_page_fast(ram_addr, size); - } - switch (size) { - case 1: - stb_p(qemu_get_ram_ptr(NULL, ram_addr), val); - break; - case 2: - stw_p(qemu_get_ram_ptr(NULL, ram_addr), val); - break; - case 4: - stl_p(qemu_get_ram_ptr(NULL, ram_addr), val); - break; - default: - abort(); - } - /* Set both VGA and migration bits for simplicity and to remove - * the notdirty callback faster. - */ - cpu_physical_memory_set_dirty_range(ram_addr, size, - DIRTY_CLIENTS_NOCODE); - /* we remove the notdirty callback only if the code has been - flushed */ - if (!cpu_physical_memory_is_clean(ram_addr)) { - tlb_set_dirty(current_cpu, current_cpu->mem_io_vaddr); - } -} - -static bool notdirty_mem_accepts(void *opaque, hwaddr addr, - unsigned size, bool is_write) -{ - return is_write; -} - -static const MemoryRegionOps notdirty_mem_ops = { - .write = notdirty_mem_write, - .valid.accepts = notdirty_mem_accepts, - .endianness = DEVICE_NATIVE_ENDIAN, -}; - -/* Generate a debug exception if a watchpoint has been hit. */ -static void check_watchpoint(int offset, int len, MemTxAttrs attrs, int flags) -{ - CPUState *cpu = current_cpu; - CPUClass *cc = CPU_GET_CLASS(cpu); - CPUArchState *env = cpu->env_ptr; - target_ulong pc, cs_base; - target_ulong vaddr; - CPUWatchpoint *wp; - int cpu_flags; - - if (cpu->watchpoint_hit) { - /* We re-entered the check after replacing the TB. Now raise - * the debug interrupt so that is will trigger after the - * current instruction. */ - cpu_interrupt(cpu, CPU_INTERRUPT_DEBUG); - return; - } - vaddr = (cpu->mem_io_vaddr & TARGET_PAGE_MASK) + offset; - QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) { - if (cpu_watchpoint_address_matches(wp, vaddr, len) - && (wp->flags & flags)) { - if (flags == BP_MEM_READ) { - wp->flags |= BP_WATCHPOINT_HIT_READ; - } else { - wp->flags |= BP_WATCHPOINT_HIT_WRITE; - } - wp->hitaddr = vaddr; - wp->hitattrs = attrs; - if (!cpu->watchpoint_hit) { - if (wp->flags & BP_CPU && - !cc->debug_check_watchpoint(cpu, wp)) { - wp->flags &= ~BP_WATCHPOINT_HIT; - continue; - } - cpu->watchpoint_hit = wp; - tb_check_watchpoint(cpu); - if (wp->flags & BP_STOP_BEFORE_ACCESS) { - cpu->exception_index = EXCP_DEBUG; - cpu_loop_exit(cpu); - } else { - cpu_get_tb_cpu_state(env, &pc, &cs_base, &cpu_flags); - tb_gen_code(cpu, pc, cs_base, cpu_flags, 1); - cpu_resume_from_signal(cpu, NULL); - } - } - } else { - wp->flags &= ~BP_WATCHPOINT_HIT; - } - } -} - -/* Watchpoint access routines. Watchpoints are inserted using TLB tricks, - so these check for a hit then pass through to the normal out-of-line - phys routines. */ -static MemTxResult watch_mem_read(void *opaque, hwaddr addr, uint64_t *pdata, - unsigned size, MemTxAttrs attrs) -{ - MemTxResult res; - uint64_t data; - int asidx = cpu_asidx_from_attrs(current_cpu, attrs); - AddressSpace *as = current_cpu->cpu_ases[asidx].as; - - check_watchpoint(addr & ~TARGET_PAGE_MASK, size, attrs, BP_MEM_READ); - switch (size) { - case 1: - data = address_space_ldub(as, addr, attrs, &res); - break; - case 2: - data = address_space_lduw(as, addr, attrs, &res); - break; - case 4: - data = address_space_ldl(as, addr, attrs, &res); - break; - default: abort(); - } - *pdata = data; - return res; -} - -static MemTxResult watch_mem_write(void *opaque, hwaddr addr, - uint64_t val, unsigned size, - MemTxAttrs attrs) -{ - MemTxResult res; - int asidx = cpu_asidx_from_attrs(current_cpu, attrs); - AddressSpace *as = current_cpu->cpu_ases[asidx].as; - - check_watchpoint(addr & ~TARGET_PAGE_MASK, size, attrs, BP_MEM_WRITE); - switch (size) { - case 1: - address_space_stb(as, addr, val, attrs, &res); - break; - case 2: - address_space_stw(as, addr, val, attrs, &res); - break; - case 4: - address_space_stl(as, addr, val, attrs, &res); - break; - default: abort(); - } - return res; -} - -static const MemoryRegionOps watch_mem_ops = { - .read_with_attrs = watch_mem_read, - .write_with_attrs = watch_mem_write, - .endianness = DEVICE_NATIVE_ENDIAN, -}; - -static MemTxResult subpage_read(void *opaque, hwaddr addr, uint64_t *data, - unsigned len, MemTxAttrs attrs) -{ - subpage_t *subpage = opaque; - uint8_t buf[8]; - MemTxResult res; - -#if defined(DEBUG_SUBPAGE) - printf("%s: subpage %p len %u addr " TARGET_FMT_plx "\n", __func__, - subpage, len, addr); -#endif - res = address_space_read(subpage->as, addr + subpage->base, - attrs, buf, len); - if (res) { - return res; - } - switch (len) { - case 1: - *data = ldub_p(buf); - return MEMTX_OK; - case 2: - *data = lduw_p(buf); - return MEMTX_OK; - case 4: - *data = ldl_p(buf); - return MEMTX_OK; - case 8: - *data = ldq_p(buf); - return MEMTX_OK; - default: - abort(); - } -} - -static MemTxResult subpage_write(void *opaque, hwaddr addr, - uint64_t value, unsigned len, MemTxAttrs attrs) -{ - subpage_t *subpage = opaque; - uint8_t buf[8]; - -#if defined(DEBUG_SUBPAGE) - printf("%s: subpage %p len %u addr " TARGET_FMT_plx - " value %"PRIx64"\n", - __func__, subpage, len, addr, value); -#endif - switch (len) { - case 1: - stb_p(buf, value); - break; - case 2: - stw_p(buf, value); - break; - case 4: - stl_p(buf, value); - break; - case 8: - stq_p(buf, value); - break; - default: - abort(); - } - return address_space_write(subpage->as, addr + subpage->base, - attrs, buf, len); -} - -static bool subpage_accepts(void *opaque, hwaddr addr, - unsigned len, bool is_write) -{ - subpage_t *subpage = opaque; -#if defined(DEBUG_SUBPAGE) - printf("%s: subpage %p %c len %u addr " TARGET_FMT_plx "\n", - __func__, subpage, is_write ? 'w' : 'r', len, addr); -#endif - - return address_space_access_valid(subpage->as, addr + subpage->base, - len, is_write); -} - -static const MemoryRegionOps subpage_ops = { - .read_with_attrs = subpage_read, - .write_with_attrs = subpage_write, - .impl.min_access_size = 1, - .impl.max_access_size = 8, - .valid.min_access_size = 1, - .valid.max_access_size = 8, - .valid.accepts = subpage_accepts, - .endianness = DEVICE_NATIVE_ENDIAN, -}; - -static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, - uint16_t section) -{ - int idx, eidx; - - if (start >= TARGET_PAGE_SIZE || end >= TARGET_PAGE_SIZE) - return -1; - idx = SUBPAGE_IDX(start); - eidx = SUBPAGE_IDX(end); -#if defined(DEBUG_SUBPAGE) - printf("%s: %p start %08x end %08x idx %08x eidx %08x section %d\n", - __func__, mmio, start, end, idx, eidx, section); -#endif - for (; idx <= eidx; idx++) { - mmio->sub_section[idx] = section; - } - - return 0; -} - -static subpage_t *subpage_init(AddressSpace *as, hwaddr base) -{ - subpage_t *mmio; - - mmio = g_malloc0(sizeof(subpage_t)); - - mmio->as = as; - mmio->base = base; - memory_region_init_io(&mmio->iomem, NULL, &subpage_ops, mmio, - NULL, TARGET_PAGE_SIZE); - mmio->iomem.subpage = true; -#if defined(DEBUG_SUBPAGE) - printf("%s: %p base " TARGET_FMT_plx " len %08x\n", __func__, - mmio, base, TARGET_PAGE_SIZE); -#endif - subpage_register(mmio, 0, TARGET_PAGE_SIZE-1, PHYS_SECTION_UNASSIGNED); - - return mmio; -} - -static uint16_t dummy_section(PhysPageMap *map, AddressSpace *as, - MemoryRegion *mr) -{ - assert(as); - MemoryRegionSection section = { - .address_space = as, - .mr = mr, - .offset_within_address_space = 0, - .offset_within_region = 0, - .size = int128_2_64(), - }; - - return phys_section_add(map, §ion); -} - -MemoryRegion *iotlb_to_region(CPUState *cpu, hwaddr index, MemTxAttrs attrs) -{ - int asidx = cpu_asidx_from_attrs(cpu, attrs); - CPUAddressSpace *cpuas = &cpu->cpu_ases[asidx]; - AddressSpaceDispatch *d = atomic_rcu_read(&cpuas->memory_dispatch); - MemoryRegionSection *sections = d->map.sections; - - return sections[index & ~TARGET_PAGE_MASK].mr; -} - -static void io_mem_init(void) -{ - memory_region_init_io(&io_mem_rom, NULL, &unassigned_mem_ops, NULL, NULL, UINT64_MAX); - memory_region_init_io(&io_mem_unassigned, NULL, &unassigned_mem_ops, NULL, - NULL, UINT64_MAX); - memory_region_init_io(&io_mem_notdirty, NULL, ¬dirty_mem_ops, NULL, - NULL, UINT64_MAX); - memory_region_init_io(&io_mem_watch, NULL, &watch_mem_ops, NULL, - NULL, UINT64_MAX); -} - -static void mem_begin(MemoryListener *listener) -{ - AddressSpace *as = container_of(listener, AddressSpace, dispatch_listener); - AddressSpaceDispatch *d = g_new0(AddressSpaceDispatch, 1); - uint16_t n; - - n = dummy_section(&d->map, as, &io_mem_unassigned); - assert(n == PHYS_SECTION_UNASSIGNED); - n = dummy_section(&d->map, as, &io_mem_notdirty); - assert(n == PHYS_SECTION_NOTDIRTY); - n = dummy_section(&d->map, as, &io_mem_rom); - assert(n == PHYS_SECTION_ROM); - n = dummy_section(&d->map, as, &io_mem_watch); - assert(n == PHYS_SECTION_WATCH); - - d->phys_map = (PhysPageEntry) { .ptr = PHYS_MAP_NODE_NIL, .skip = 1 }; - d->as = as; - as->next_dispatch = d; -} - -static void address_space_dispatch_free(AddressSpaceDispatch *d) -{ - phys_sections_free(&d->map); - g_free(d); -} - -static void mem_commit(MemoryListener *listener) -{ - AddressSpace *as = container_of(listener, AddressSpace, dispatch_listener); - AddressSpaceDispatch *cur = as->dispatch; - AddressSpaceDispatch *next = as->next_dispatch; - - phys_page_compact_all(next, next->map.nodes_nb); - - atomic_rcu_set(&as->dispatch, next); - if (cur) { - call_rcu(cur, address_space_dispatch_free, rcu); - } -} - -static void tcg_commit(MemoryListener *listener) -{ - CPUAddressSpace *cpuas; - AddressSpaceDispatch *d; - - /* since each CPU stores ram addresses in its TLB cache, we must - reset the modified entries */ - cpuas = container_of(listener, CPUAddressSpace, tcg_as_listener); - cpu_reloading_memory_map(); - /* The CPU and TLB are protected by the iothread lock. - * We reload the dispatch pointer now because cpu_reloading_memory_map() - * may have split the RCU critical section. - */ - d = atomic_rcu_read(&cpuas->as->dispatch); - cpuas->memory_dispatch = d; - tlb_flush(cpuas->cpu, 1); -} - -void address_space_init_dispatch(AddressSpace *as) -{ - as->dispatch = NULL; - as->dispatch_listener = (MemoryListener) { - .begin = mem_begin, - .commit = mem_commit, - .region_add = mem_add, - .region_nop = mem_add, - .priority = 0, - }; - memory_listener_register(&as->dispatch_listener, as); -} - -void address_space_unregister(AddressSpace *as) -{ - memory_listener_unregister(&as->dispatch_listener); -} - -void address_space_destroy_dispatch(AddressSpace *as) -{ - AddressSpaceDispatch *d = as->dispatch; - - atomic_rcu_set(&as->dispatch, NULL); - if (d) { - call_rcu(d, address_space_dispatch_free, rcu); - } -} - -static void memory_map_init(void) -{ - system_memory = g_malloc(sizeof(*system_memory)); - - memory_region_init(system_memory, NULL, "system", UINT64_MAX); - address_space_init(&address_space_memory, system_memory, "memory"); - - system_io = g_malloc(sizeof(*system_io)); - memory_region_init_io(system_io, NULL, &unassigned_io_ops, NULL, "io", - 65536); - address_space_init(&address_space_io, system_io, "I/O"); -} - -MemoryRegion *get_system_memory(void) -{ - return system_memory; -} - -MemoryRegion *get_system_io(void) -{ - return system_io; -} - -#endif /* !defined(CONFIG_USER_ONLY) */ - -/* physical memory access (slow version, mainly for debug) */ -#if defined(CONFIG_USER_ONLY) -int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr, - uint8_t *buf, int len, int is_write) -{ - int l, flags; - target_ulong page; - void * p; - - while (len > 0) { - page = addr & TARGET_PAGE_MASK; - l = (page + TARGET_PAGE_SIZE) - addr; - if (l > len) - l = len; - flags = page_get_flags(page); - if (!(flags & PAGE_VALID)) - return -1; - if (is_write) { - if (!(flags & PAGE_WRITE)) - return -1; - /* XXX: this code should not depend on lock_user */ - if (!(p = lock_user(VERIFY_WRITE, addr, l, 0))) - return -1; - memcpy(p, buf, l); - unlock_user(p, addr, l); - } else { - if (!(flags & PAGE_READ)) - return -1; - /* XXX: this code should not depend on lock_user */ - if (!(p = lock_user(VERIFY_READ, addr, l, 1))) - return -1; - memcpy(buf, p, l); - unlock_user(p, addr, 0); - } - len -= l; - buf += l; - addr += l; - } - return 0; -} - -#else - -static void invalidate_and_set_dirty(MemoryRegion *mr, hwaddr addr, - hwaddr length) -{ - uint8_t dirty_log_mask = memory_region_get_dirty_log_mask(mr); - /* No early return if dirty_log_mask is or becomes 0, because - * cpu_physical_memory_set_dirty_range will still call - * xen_modified_memory. - */ - if (dirty_log_mask) { - dirty_log_mask = - cpu_physical_memory_range_includes_clean(addr, length, dirty_log_mask); - } - if (dirty_log_mask & (1 << DIRTY_MEMORY_CODE)) { - tb_invalidate_phys_range(addr, addr + length); - dirty_log_mask &= ~(1 << DIRTY_MEMORY_CODE); - } - cpu_physical_memory_set_dirty_range(addr, length, dirty_log_mask); -} - -static int memory_access_size(MemoryRegion *mr, unsigned l, hwaddr addr) -{ - unsigned access_size_max = mr->ops->valid.max_access_size; - - /* Regions are assumed to support 1-4 byte accesses unless - otherwise specified. */ - if (access_size_max == 0) { - access_size_max = 4; - } - - /* Bound the maximum access by the alignment of the address. */ - if (!mr->ops->impl.unaligned) { - unsigned align_size_max = addr & -addr; - if (align_size_max != 0 && align_size_max < access_size_max) { - access_size_max = align_size_max; - } - } - - /* Don't attempt accesses larger than the maximum. */ - if (l > access_size_max) { - l = access_size_max; - } - l = pow2floor(l); - - return l; -} - -static bool prepare_mmio_access(MemoryRegion *mr) -{ - bool unlocked = !qemu_mutex_iothread_locked(); - bool release_lock = false; - - if (unlocked && mr->global_locking) { - qemu_mutex_lock_iothread(); - unlocked = false; - release_lock = true; - } - if (mr->flush_coalesced_mmio) { - if (unlocked) { - qemu_mutex_lock_iothread(); - } - qemu_flush_coalesced_mmio_buffer(); - if (unlocked) { - qemu_mutex_unlock_iothread(); - } - } - - return release_lock; -} - -/* Called within RCU critical section. */ -static MemTxResult address_space_write_continue(AddressSpace *as, hwaddr addr, - MemTxAttrs attrs, - const uint8_t *buf, - int len, hwaddr addr1, - hwaddr l, MemoryRegion *mr) -{ - uint8_t *ptr; - uint64_t val; - MemTxResult result = MEMTX_OK; - bool release_lock = false; - - for (;;) { - if (!memory_access_is_direct(mr, true)) { - release_lock |= prepare_mmio_access(mr); - l = memory_access_size(mr, l, addr1); - /* XXX: could force current_cpu to NULL to avoid - potential bugs */ - switch (l) { - case 8: - /* 64 bit write access */ - val = ldq_p(buf); - result |= memory_region_dispatch_write(mr, addr1, val, 8, - attrs); - break; - case 4: - /* 32 bit write access */ - val = ldl_p(buf); - result |= memory_region_dispatch_write(mr, addr1, val, 4, - attrs); - break; - case 2: - /* 16 bit write access */ - val = lduw_p(buf); - result |= memory_region_dispatch_write(mr, addr1, val, 2, - attrs); - break; - case 1: - /* 8 bit write access */ - val = ldub_p(buf); - result |= memory_region_dispatch_write(mr, addr1, val, 1, - attrs); - break; - default: - abort(); - } - } else { - addr1 += memory_region_get_ram_addr(mr); - /* RAM case */ - ptr = qemu_get_ram_ptr(mr->ram_block, addr1); - memcpy(ptr, buf, l); - invalidate_and_set_dirty(mr, addr1, l); - } - - if (release_lock) { - qemu_mutex_unlock_iothread(); - release_lock = false; - } - - len -= l; - buf += l; - addr += l; - - if (!len) { - break; - } - - l = len; - mr = address_space_translate(as, addr, &addr1, &l, true); - } - - return result; -} - -MemTxResult address_space_write(AddressSpace *as, hwaddr addr, MemTxAttrs attrs, - const uint8_t *buf, int len) -{ - hwaddr l; - hwaddr addr1; - MemoryRegion *mr; - MemTxResult result = MEMTX_OK; - - if (len > 0) { - rcu_read_lock(); - l = len; - mr = address_space_translate(as, addr, &addr1, &l, true); - result = address_space_write_continue(as, addr, attrs, buf, len, - addr1, l, mr); - rcu_read_unlock(); - } - - return result; -} - -/* Called within RCU critical section. */ -MemTxResult address_space_read_continue(AddressSpace *as, hwaddr addr, - MemTxAttrs attrs, uint8_t *buf, - int len, hwaddr addr1, hwaddr l, - MemoryRegion *mr) -{ - uint8_t *ptr; - uint64_t val; - MemTxResult result = MEMTX_OK; - bool release_lock = false; - - for (;;) { - if (!memory_access_is_direct(mr, false)) { - /* I/O case */ - release_lock |= prepare_mmio_access(mr); - l = memory_access_size(mr, l, addr1); - switch (l) { - case 8: - /* 64 bit read access */ - result |= memory_region_dispatch_read(mr, addr1, &val, 8, - attrs); - stq_p(buf, val); - break; - case 4: - /* 32 bit read access */ - result |= memory_region_dispatch_read(mr, addr1, &val, 4, - attrs); - stl_p(buf, val); - break; - case 2: - /* 16 bit read access */ - result |= memory_region_dispatch_read(mr, addr1, &val, 2, - attrs); - stw_p(buf, val); - break; - case 1: - /* 8 bit read access */ - result |= memory_region_dispatch_read(mr, addr1, &val, 1, - attrs); - stb_p(buf, val); - break; - default: - abort(); - } - } else { - /* RAM case */ - ptr = qemu_get_ram_ptr(mr->ram_block, - memory_region_get_ram_addr(mr) + addr1); - memcpy(buf, ptr, l); - } - - if (release_lock) { - qemu_mutex_unlock_iothread(); - release_lock = false; - } - - len -= l; - buf += l; - addr += l; - - if (!len) { - break; - } - - l = len; - mr = address_space_translate(as, addr, &addr1, &l, false); - } - - return result; -} - -MemTxResult address_space_read_full(AddressSpace *as, hwaddr addr, - MemTxAttrs attrs, uint8_t *buf, int len) -{ - hwaddr l; - hwaddr addr1; - MemoryRegion *mr; - MemTxResult result = MEMTX_OK; - - if (len > 0) { - rcu_read_lock(); - l = len; - mr = address_space_translate(as, addr, &addr1, &l, false); - result = address_space_read_continue(as, addr, attrs, buf, len, - addr1, l, mr); - rcu_read_unlock(); - } - - return result; -} - -MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, MemTxAttrs attrs, - uint8_t *buf, int len, bool is_write) -{ - if (is_write) { - return address_space_write(as, addr, attrs, (uint8_t *)buf, len); - } else { - return address_space_read(as, addr, attrs, (uint8_t *)buf, len); - } -} - -void cpu_physical_memory_rw(hwaddr addr, uint8_t *buf, - int len, int is_write) -{ - address_space_rw(&address_space_memory, addr, MEMTXATTRS_UNSPECIFIED, - buf, len, is_write); -} - -enum write_rom_type { - WRITE_DATA, - FLUSH_CACHE, -}; - -static inline void cpu_physical_memory_write_rom_internal(AddressSpace *as, - hwaddr addr, const uint8_t *buf, int len, enum write_rom_type type) -{ - hwaddr l; - uint8_t *ptr; - hwaddr addr1; - MemoryRegion *mr; - - rcu_read_lock(); - while (len > 0) { - l = len; - mr = address_space_translate(as, addr, &addr1, &l, true); - - if (!(memory_region_is_ram(mr) || - memory_region_is_romd(mr))) { - l = memory_access_size(mr, l, addr1); - } else { - addr1 += memory_region_get_ram_addr(mr); - /* ROM/RAM case */ - ptr = qemu_get_ram_ptr(mr->ram_block, addr1); - switch (type) { - case WRITE_DATA: - memcpy(ptr, buf, l); - invalidate_and_set_dirty(mr, addr1, l); - break; - case FLUSH_CACHE: - flush_icache_range((uintptr_t)ptr, (uintptr_t)ptr + l); - break; - } - } - len -= l; - buf += l; - addr += l; - } - rcu_read_unlock(); -} - -/* used for ROM loading : can write in RAM and ROM */ -void cpu_physical_memory_write_rom(AddressSpace *as, hwaddr addr, - const uint8_t *buf, int len) -{ - cpu_physical_memory_write_rom_internal(as, addr, buf, len, WRITE_DATA); -} - -void cpu_flush_icache_range(hwaddr start, int len) -{ - /* - * This function should do the same thing as an icache flush that was - * triggered from within the guest. For TCG we are always cache coherent, - * so there is no need to flush anything. For KVM / Xen we need to flush - * the host's instruction cache at least. - */ - if (tcg_enabled()) { - return; - } - - cpu_physical_memory_write_rom_internal(&address_space_memory, - start, NULL, len, FLUSH_CACHE); -} - -typedef struct { - MemoryRegion *mr; - void *buffer; - hwaddr addr; - hwaddr len; - bool in_use; -} BounceBuffer; - -static BounceBuffer bounce; - -typedef struct MapClient { - QEMUBH *bh; - QLIST_ENTRY(MapClient) link; -} MapClient; - -QemuMutex map_client_list_lock; -static QLIST_HEAD(map_client_list, MapClient) map_client_list - = QLIST_HEAD_INITIALIZER(map_client_list); - -static void cpu_unregister_map_client_do(MapClient *client) -{ - QLIST_REMOVE(client, link); - g_free(client); -} - -static void cpu_notify_map_clients_locked(void) -{ - MapClient *client; - - while (!QLIST_EMPTY(&map_client_list)) { - client = QLIST_FIRST(&map_client_list); - qemu_bh_schedule(client->bh); - cpu_unregister_map_client_do(client); - } -} - -void cpu_register_map_client(QEMUBH *bh) -{ - MapClient *client = g_malloc(sizeof(*client)); - - qemu_mutex_lock(&map_client_list_lock); - client->bh = bh; - QLIST_INSERT_HEAD(&map_client_list, client, link); - if (!atomic_read(&bounce.in_use)) { - cpu_notify_map_clients_locked(); - } - qemu_mutex_unlock(&map_client_list_lock); -} - -void cpu_exec_init_all(void) -{ - qemu_mutex_init(&ram_list.mutex); - io_mem_init(); - memory_map_init(); - qemu_mutex_init(&map_client_list_lock); -} - -void cpu_unregister_map_client(QEMUBH *bh) -{ - MapClient *client; - - qemu_mutex_lock(&map_client_list_lock); - QLIST_FOREACH(client, &map_client_list, link) { - if (client->bh == bh) { - cpu_unregister_map_client_do(client); - break; - } - } - qemu_mutex_unlock(&map_client_list_lock); -} - -static void cpu_notify_map_clients(void) -{ - qemu_mutex_lock(&map_client_list_lock); - cpu_notify_map_clients_locked(); - qemu_mutex_unlock(&map_client_list_lock); -} - -bool address_space_access_valid(AddressSpace *as, hwaddr addr, int len, bool is_write) -{ - MemoryRegion *mr; - hwaddr l, xlat; - - rcu_read_lock(); - while (len > 0) { - l = len; - mr = address_space_translate(as, addr, &xlat, &l, is_write); - if (!memory_access_is_direct(mr, is_write)) { - l = memory_access_size(mr, l, addr); - if (!memory_region_access_valid(mr, xlat, l, is_write)) { - return false; - } - } - - len -= l; - addr += l; - } - rcu_read_unlock(); - return true; -} - -/* Map a physical memory region into a host virtual address. - * May map a subset of the requested range, given by and returned in *plen. - * May return NULL if resources needed to perform the mapping are exhausted. - * Use only for reads OR writes - not for read-modify-write operations. - * Use cpu_register_map_client() to know when retrying the map operation is - * likely to succeed. - */ -void *address_space_map(AddressSpace *as, - hwaddr addr, - hwaddr *plen, - bool is_write) -{ - hwaddr len = *plen; - hwaddr done = 0; - hwaddr l, xlat, base; - MemoryRegion *mr, *this_mr; - ram_addr_t raddr; - void *ptr; - - if (len == 0) { - return NULL; - } - - l = len; - rcu_read_lock(); - mr = address_space_translate(as, addr, &xlat, &l, is_write); - - if (!memory_access_is_direct(mr, is_write)) { - if (atomic_xchg(&bounce.in_use, true)) { - rcu_read_unlock(); - return NULL; - } - /* Avoid unbounded allocations */ - l = MIN(l, TARGET_PAGE_SIZE); - bounce.buffer = qemu_memalign(TARGET_PAGE_SIZE, l); - bounce.addr = addr; - bounce.len = l; - - memory_region_ref(mr); - bounce.mr = mr; - if (!is_write) { - address_space_read(as, addr, MEMTXATTRS_UNSPECIFIED, - bounce.buffer, l); - } - - rcu_read_unlock(); - *plen = l; - return bounce.buffer; - } - - base = xlat; - raddr = memory_region_get_ram_addr(mr); - - for (;;) { - len -= l; - addr += l; - done += l; - if (len == 0) { - break; - } - - l = len; - this_mr = address_space_translate(as, addr, &xlat, &l, is_write); - if (this_mr != mr || xlat != base + done) { - break; - } - } - - memory_region_ref(mr); - *plen = done; - ptr = qemu_ram_ptr_length(mr->ram_block, raddr + base, plen); - rcu_read_unlock(); - - return ptr; -} - -/* Unmaps a memory region previously mapped by address_space_map(). - * Will also mark the memory as dirty if is_write == 1. access_len gives - * the amount of memory that was actually read or written by the caller. - */ -void address_space_unmap(AddressSpace *as, void *buffer, hwaddr len, - int is_write, hwaddr access_len) -{ - if (buffer != bounce.buffer) { - MemoryRegion *mr; - ram_addr_t addr1; - - mr = qemu_ram_addr_from_host(buffer, &addr1); - assert(mr != NULL); - if (is_write) { - invalidate_and_set_dirty(mr, addr1, access_len); - } - if (xen_enabled()) { - xen_invalidate_map_cache_entry(buffer); - } - memory_region_unref(mr); - return; - } - if (is_write) { - address_space_write(as, bounce.addr, MEMTXATTRS_UNSPECIFIED, - bounce.buffer, access_len); - } - qemu_vfree(bounce.buffer); - bounce.buffer = NULL; - memory_region_unref(bounce.mr); - atomic_mb_set(&bounce.in_use, false); - cpu_notify_map_clients(); -} - -void *cpu_physical_memory_map(hwaddr addr, - hwaddr *plen, - int is_write) -{ - return address_space_map(&address_space_memory, addr, plen, is_write); -} - -void cpu_physical_memory_unmap(void *buffer, hwaddr len, - int is_write, hwaddr access_len) -{ - return address_space_unmap(&address_space_memory, buffer, len, is_write, access_len); -} - -/* warning: addr must be aligned */ -static inline uint32_t address_space_ldl_internal(AddressSpace *as, hwaddr addr, - MemTxAttrs attrs, - MemTxResult *result, - enum device_endian endian) -{ - uint8_t *ptr; - uint64_t val; - MemoryRegion *mr; - hwaddr l = 4; - hwaddr addr1; - MemTxResult r; - bool release_lock = false; - - rcu_read_lock(); - mr = address_space_translate(as, addr, &addr1, &l, false); - if (l < 4 || !memory_access_is_direct(mr, false)) { - release_lock |= prepare_mmio_access(mr); - - /* I/O case */ - r = memory_region_dispatch_read(mr, addr1, &val, 4, attrs); -#if defined(TARGET_WORDS_BIGENDIAN) - if (endian == DEVICE_LITTLE_ENDIAN) { - val = bswap32(val); - } -#else - if (endian == DEVICE_BIG_ENDIAN) { - val = bswap32(val); - } -#endif - } else { - /* RAM case */ - ptr = qemu_get_ram_ptr(mr->ram_block, - (memory_region_get_ram_addr(mr) - & TARGET_PAGE_MASK) - + addr1); - switch (endian) { - case DEVICE_LITTLE_ENDIAN: - val = ldl_le_p(ptr); - break; - case DEVICE_BIG_ENDIAN: - val = ldl_be_p(ptr); - break; - default: - val = ldl_p(ptr); - break; - } - r = MEMTX_OK; - } - if (result) { - *result = r; - } - if (release_lock) { - qemu_mutex_unlock_iothread(); - } - rcu_read_unlock(); - return val; -} - -uint32_t address_space_ldl(AddressSpace *as, hwaddr addr, - MemTxAttrs attrs, MemTxResult *result) -{ - return address_space_ldl_internal(as, addr, attrs, result, - DEVICE_NATIVE_ENDIAN); -} - -uint32_t address_space_ldl_le(AddressSpace *as, hwaddr addr, - MemTxAttrs attrs, MemTxResult *result) -{ - return address_space_ldl_internal(as, addr, attrs, result, - DEVICE_LITTLE_ENDIAN); -} - -uint32_t address_space_ldl_be(AddressSpace *as, hwaddr addr, - MemTxAttrs attrs, MemTxResult *result) -{ - return address_space_ldl_internal(as, addr, attrs, result, - DEVICE_BIG_ENDIAN); -} - -uint32_t ldl_phys(AddressSpace *as, hwaddr addr) -{ - return address_space_ldl(as, addr, MEMTXATTRS_UNSPECIFIED, NULL); -} - -uint32_t ldl_le_phys(AddressSpace *as, hwaddr addr) -{ - return address_space_ldl_le(as, addr, MEMTXATTRS_UNSPECIFIED, NULL); -} - -uint32_t ldl_be_phys(AddressSpace *as, hwaddr addr) -{ - return address_space_ldl_be(as, addr, MEMTXATTRS_UNSPECIFIED, NULL); -} - -/* warning: addr must be aligned */ -static inline uint64_t address_space_ldq_internal(AddressSpace *as, hwaddr addr, - MemTxAttrs attrs, - MemTxResult *result, - enum device_endian endian) -{ - uint8_t *ptr; - uint64_t val; - MemoryRegion *mr; - hwaddr l = 8; - hwaddr addr1; - MemTxResult r; - bool release_lock = false; - - rcu_read_lock(); - mr = address_space_translate(as, addr, &addr1, &l, - false); - if (l < 8 || !memory_access_is_direct(mr, false)) { - release_lock |= prepare_mmio_access(mr); - - /* I/O case */ - r = memory_region_dispatch_read(mr, addr1, &val, 8, attrs); -#if defined(TARGET_WORDS_BIGENDIAN) - if (endian == DEVICE_LITTLE_ENDIAN) { - val = bswap64(val); - } -#else - if (endian == DEVICE_BIG_ENDIAN) { - val = bswap64(val); - } -#endif - } else { - /* RAM case */ - ptr = qemu_get_ram_ptr(mr->ram_block, - (memory_region_get_ram_addr(mr) - & TARGET_PAGE_MASK) - + addr1); - switch (endian) { - case DEVICE_LITTLE_ENDIAN: - val = ldq_le_p(ptr); - break; - case DEVICE_BIG_ENDIAN: - val = ldq_be_p(ptr); - break; - default: - val = ldq_p(ptr); - break; - } - r = MEMTX_OK; - } - if (result) { - *result = r; - } - if (release_lock) { - qemu_mutex_unlock_iothread(); - } - rcu_read_unlock(); - return val; -} - -uint64_t address_space_ldq(AddressSpace *as, hwaddr addr, - MemTxAttrs attrs, MemTxResult *result) -{ - return address_space_ldq_internal(as, addr, attrs, result, - DEVICE_NATIVE_ENDIAN); -} - -uint64_t address_space_ldq_le(AddressSpace *as, hwaddr addr, - MemTxAttrs attrs, MemTxResult *result) -{ - return address_space_ldq_internal(as, addr, attrs, result, - DEVICE_LITTLE_ENDIAN); -} - -uint64_t address_space_ldq_be(AddressSpace *as, hwaddr addr, - MemTxAttrs attrs, MemTxResult *result) -{ - return address_space_ldq_internal(as, addr, attrs, result, - DEVICE_BIG_ENDIAN); -} - -uint64_t ldq_phys(AddressSpace *as, hwaddr addr) -{ - return address_space_ldq(as, addr, MEMTXATTRS_UNSPECIFIED, NULL); -} - -uint64_t ldq_le_phys(AddressSpace *as, hwaddr addr) -{ - return address_space_ldq_le(as, addr, MEMTXATTRS_UNSPECIFIED, NULL); -} - -uint64_t ldq_be_phys(AddressSpace *as, hwaddr addr) -{ - return address_space_ldq_be(as, addr, MEMTXATTRS_UNSPECIFIED, NULL); -} - -/* XXX: optimize */ -uint32_t address_space_ldub(AddressSpace *as, hwaddr addr, - MemTxAttrs attrs, MemTxResult *result) -{ - uint8_t val; - MemTxResult r; - - r = address_space_rw(as, addr, attrs, &val, 1, 0); - if (result) { - *result = r; - } - return val; -} - -uint32_t ldub_phys(AddressSpace *as, hwaddr addr) -{ - return address_space_ldub(as, addr, MEMTXATTRS_UNSPECIFIED, NULL); -} - -/* warning: addr must be aligned */ -static inline uint32_t address_space_lduw_internal(AddressSpace *as, - hwaddr addr, - MemTxAttrs attrs, - MemTxResult *result, - enum device_endian endian) -{ - uint8_t *ptr; - uint64_t val; - MemoryRegion *mr; - hwaddr l = 2; - hwaddr addr1; - MemTxResult r; - bool release_lock = false; - - rcu_read_lock(); - mr = address_space_translate(as, addr, &addr1, &l, - false); - if (l < 2 || !memory_access_is_direct(mr, false)) { - release_lock |= prepare_mmio_access(mr); - - /* I/O case */ - r = memory_region_dispatch_read(mr, addr1, &val, 2, attrs); -#if defined(TARGET_WORDS_BIGENDIAN) - if (endian == DEVICE_LITTLE_ENDIAN) { - val = bswap16(val); - } -#else - if (endian == DEVICE_BIG_ENDIAN) { - val = bswap16(val); - } -#endif - } else { - /* RAM case */ - ptr = qemu_get_ram_ptr(mr->ram_block, - (memory_region_get_ram_addr(mr) - & TARGET_PAGE_MASK) - + addr1); - switch (endian) { - case DEVICE_LITTLE_ENDIAN: - val = lduw_le_p(ptr); - break; - case DEVICE_BIG_ENDIAN: - val = lduw_be_p(ptr); - break; - default: - val = lduw_p(ptr); - break; - } - r = MEMTX_OK; - } - if (result) { - *result = r; - } - if (release_lock) { - qemu_mutex_unlock_iothread(); - } - rcu_read_unlock(); - return val; -} - -uint32_t address_space_lduw(AddressSpace *as, hwaddr addr, - MemTxAttrs attrs, MemTxResult *result) -{ - return address_space_lduw_internal(as, addr, attrs, result, - DEVICE_NATIVE_ENDIAN); -} - -uint32_t address_space_lduw_le(AddressSpace *as, hwaddr addr, - MemTxAttrs attrs, MemTxResult *result) -{ - return address_space_lduw_internal(as, addr, attrs, result, - DEVICE_LITTLE_ENDIAN); -} - -uint32_t address_space_lduw_be(AddressSpace *as, hwaddr addr, - MemTxAttrs attrs, MemTxResult *result) -{ - return address_space_lduw_internal(as, addr, attrs, result, - DEVICE_BIG_ENDIAN); -} - -uint32_t lduw_phys(AddressSpace *as, hwaddr addr) -{ - return address_space_lduw(as, addr, MEMTXATTRS_UNSPECIFIED, NULL); -} - -uint32_t lduw_le_phys(AddressSpace *as, hwaddr addr) -{ - return address_space_lduw_le(as, addr, MEMTXATTRS_UNSPECIFIED, NULL); -} - -uint32_t lduw_be_phys(AddressSpace *as, hwaddr addr) -{ - return address_space_lduw_be(as, addr, MEMTXATTRS_UNSPECIFIED, NULL); -} - -/* warning: addr must be aligned. The ram page is not masked as dirty - and the code inside is not invalidated. It is useful if the dirty - bits are used to track modified PTEs */ -void address_space_stl_notdirty(AddressSpace *as, hwaddr addr, uint32_t val, - MemTxAttrs attrs, MemTxResult *result) -{ - uint8_t *ptr; - MemoryRegion *mr; - hwaddr l = 4; - hwaddr addr1; - MemTxResult r; - uint8_t dirty_log_mask; - bool release_lock = false; - - rcu_read_lock(); - mr = address_space_translate(as, addr, &addr1, &l, - true); - if (l < 4 || !memory_access_is_direct(mr, true)) { - release_lock |= prepare_mmio_access(mr); - - r = memory_region_dispatch_write(mr, addr1, val, 4, attrs); - } else { - addr1 += memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK; - ptr = qemu_get_ram_ptr(mr->ram_block, addr1); - stl_p(ptr, val); - - dirty_log_mask = memory_region_get_dirty_log_mask(mr); - dirty_log_mask &= ~(1 << DIRTY_MEMORY_CODE); - cpu_physical_memory_set_dirty_range(addr1, 4, dirty_log_mask); - r = MEMTX_OK; - } - if (result) { - *result = r; - } - if (release_lock) { - qemu_mutex_unlock_iothread(); - } - rcu_read_unlock(); -} - -void stl_phys_notdirty(AddressSpace *as, hwaddr addr, uint32_t val) -{ - address_space_stl_notdirty(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL); -} - -/* warning: addr must be aligned */ -static inline void address_space_stl_internal(AddressSpace *as, - hwaddr addr, uint32_t val, - MemTxAttrs attrs, - MemTxResult *result, - enum device_endian endian) -{ - uint8_t *ptr; - MemoryRegion *mr; - hwaddr l = 4; - hwaddr addr1; - MemTxResult r; - bool release_lock = false; - - rcu_read_lock(); - mr = address_space_translate(as, addr, &addr1, &l, - true); - if (l < 4 || !memory_access_is_direct(mr, true)) { - release_lock |= prepare_mmio_access(mr); - -#if defined(TARGET_WORDS_BIGENDIAN) - if (endian == DEVICE_LITTLE_ENDIAN) { - val = bswap32(val); - } -#else - if (endian == DEVICE_BIG_ENDIAN) { - val = bswap32(val); - } -#endif - r = memory_region_dispatch_write(mr, addr1, val, 4, attrs); - } else { - /* RAM case */ - addr1 += memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK; - ptr = qemu_get_ram_ptr(mr->ram_block, addr1); - switch (endian) { - case DEVICE_LITTLE_ENDIAN: - stl_le_p(ptr, val); - break; - case DEVICE_BIG_ENDIAN: - stl_be_p(ptr, val); - break; - default: - stl_p(ptr, val); - break; - } - invalidate_and_set_dirty(mr, addr1, 4); - r = MEMTX_OK; - } - if (result) { - *result = r; - } - if (release_lock) { - qemu_mutex_unlock_iothread(); - } - rcu_read_unlock(); -} - -void address_space_stl(AddressSpace *as, hwaddr addr, uint32_t val, - MemTxAttrs attrs, MemTxResult *result) -{ - address_space_stl_internal(as, addr, val, attrs, result, - DEVICE_NATIVE_ENDIAN); -} - -void address_space_stl_le(AddressSpace *as, hwaddr addr, uint32_t val, - MemTxAttrs attrs, MemTxResult *result) -{ - address_space_stl_internal(as, addr, val, attrs, result, - DEVICE_LITTLE_ENDIAN); -} - -void address_space_stl_be(AddressSpace *as, hwaddr addr, uint32_t val, - MemTxAttrs attrs, MemTxResult *result) -{ - address_space_stl_internal(as, addr, val, attrs, result, - DEVICE_BIG_ENDIAN); -} - -void stl_phys(AddressSpace *as, hwaddr addr, uint32_t val) -{ - address_space_stl(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL); -} - -void stl_le_phys(AddressSpace *as, hwaddr addr, uint32_t val) -{ - address_space_stl_le(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL); -} - -void stl_be_phys(AddressSpace *as, hwaddr addr, uint32_t val) -{ - address_space_stl_be(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL); -} - -/* XXX: optimize */ -void address_space_stb(AddressSpace *as, hwaddr addr, uint32_t val, - MemTxAttrs attrs, MemTxResult *result) -{ - uint8_t v = val; - MemTxResult r; - - r = address_space_rw(as, addr, attrs, &v, 1, 1); - if (result) { - *result = r; - } -} - -void stb_phys(AddressSpace *as, hwaddr addr, uint32_t val) -{ - address_space_stb(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL); -} - -/* warning: addr must be aligned */ -static inline void address_space_stw_internal(AddressSpace *as, - hwaddr addr, uint32_t val, - MemTxAttrs attrs, - MemTxResult *result, - enum device_endian endian) -{ - uint8_t *ptr; - MemoryRegion *mr; - hwaddr l = 2; - hwaddr addr1; - MemTxResult r; - bool release_lock = false; - - rcu_read_lock(); - mr = address_space_translate(as, addr, &addr1, &l, true); - if (l < 2 || !memory_access_is_direct(mr, true)) { - release_lock |= prepare_mmio_access(mr); - -#if defined(TARGET_WORDS_BIGENDIAN) - if (endian == DEVICE_LITTLE_ENDIAN) { - val = bswap16(val); - } -#else - if (endian == DEVICE_BIG_ENDIAN) { - val = bswap16(val); - } -#endif - r = memory_region_dispatch_write(mr, addr1, val, 2, attrs); - } else { - /* RAM case */ - addr1 += memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK; - ptr = qemu_get_ram_ptr(mr->ram_block, addr1); - switch (endian) { - case DEVICE_LITTLE_ENDIAN: - stw_le_p(ptr, val); - break; - case DEVICE_BIG_ENDIAN: - stw_be_p(ptr, val); - break; - default: - stw_p(ptr, val); - break; - } - invalidate_and_set_dirty(mr, addr1, 2); - r = MEMTX_OK; - } - if (result) { - *result = r; - } - if (release_lock) { - qemu_mutex_unlock_iothread(); - } - rcu_read_unlock(); -} - -void address_space_stw(AddressSpace *as, hwaddr addr, uint32_t val, - MemTxAttrs attrs, MemTxResult *result) -{ - address_space_stw_internal(as, addr, val, attrs, result, - DEVICE_NATIVE_ENDIAN); -} - -void address_space_stw_le(AddressSpace *as, hwaddr addr, uint32_t val, - MemTxAttrs attrs, MemTxResult *result) -{ - address_space_stw_internal(as, addr, val, attrs, result, - DEVICE_LITTLE_ENDIAN); -} - -void address_space_stw_be(AddressSpace *as, hwaddr addr, uint32_t val, - MemTxAttrs attrs, MemTxResult *result) -{ - address_space_stw_internal(as, addr, val, attrs, result, - DEVICE_BIG_ENDIAN); -} - -void stw_phys(AddressSpace *as, hwaddr addr, uint32_t val) -{ - address_space_stw(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL); -} - -void stw_le_phys(AddressSpace *as, hwaddr addr, uint32_t val) -{ - address_space_stw_le(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL); -} - -void stw_be_phys(AddressSpace *as, hwaddr addr, uint32_t val) -{ - address_space_stw_be(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL); -} - -/* XXX: optimize */ -void address_space_stq(AddressSpace *as, hwaddr addr, uint64_t val, - MemTxAttrs attrs, MemTxResult *result) -{ - MemTxResult r; - val = tswap64(val); - r = address_space_rw(as, addr, attrs, (void *) &val, 8, 1); - if (result) { - *result = r; - } -} - -void address_space_stq_le(AddressSpace *as, hwaddr addr, uint64_t val, - MemTxAttrs attrs, MemTxResult *result) -{ - MemTxResult r; - val = cpu_to_le64(val); - r = address_space_rw(as, addr, attrs, (void *) &val, 8, 1); - if (result) { - *result = r; - } -} -void address_space_stq_be(AddressSpace *as, hwaddr addr, uint64_t val, - MemTxAttrs attrs, MemTxResult *result) -{ - MemTxResult r; - val = cpu_to_be64(val); - r = address_space_rw(as, addr, attrs, (void *) &val, 8, 1); - if (result) { - *result = r; - } -} - -void stq_phys(AddressSpace *as, hwaddr addr, uint64_t val) -{ - address_space_stq(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL); -} - -void stq_le_phys(AddressSpace *as, hwaddr addr, uint64_t val) -{ - address_space_stq_le(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL); -} - -void stq_be_phys(AddressSpace *as, hwaddr addr, uint64_t val) -{ - address_space_stq_be(as, addr, val, MEMTXATTRS_UNSPECIFIED, NULL); -} - -/* virtual memory access for debug (includes writing to ROM) */ -int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr, - uint8_t *buf, int len, int is_write) -{ - int l; - hwaddr phys_addr; - target_ulong page; - - while (len > 0) { - int asidx; - MemTxAttrs attrs; - - page = addr & TARGET_PAGE_MASK; - phys_addr = cpu_get_phys_page_attrs_debug(cpu, page, &attrs); - asidx = cpu_asidx_from_attrs(cpu, attrs); - /* if no physical page mapped, return an error */ - if (phys_addr == -1) - return -1; - l = (page + TARGET_PAGE_SIZE) - addr; - if (l > len) - l = len; - phys_addr += (addr & ~TARGET_PAGE_MASK); - if (is_write) { - cpu_physical_memory_write_rom(cpu->cpu_ases[asidx].as, - phys_addr, buf, l); - } else { - address_space_rw(cpu->cpu_ases[asidx].as, phys_addr, - MEMTXATTRS_UNSPECIFIED, - buf, l, 0); - } - len -= l; - buf += l; - addr += l; - } - return 0; -} - -/* - * Allows code that needs to deal with migration bitmaps etc to still be built - * target independent. - */ -size_t qemu_target_page_bits(void) -{ - return TARGET_PAGE_BITS; -} - -#endif - -/* - * A helper function for the _utterly broken_ virtio device model to find out if - * it's running on a big endian machine. Don't do this at home kids! - */ -bool target_words_bigendian(void); -bool target_words_bigendian(void) -{ -#if defined(TARGET_WORDS_BIGENDIAN) - return true; -#else - return false; -#endif -} - -#ifndef CONFIG_USER_ONLY -bool cpu_physical_memory_is_io(hwaddr phys_addr) -{ - MemoryRegion*mr; - hwaddr l = 1; - bool res; - - rcu_read_lock(); - mr = address_space_translate(&address_space_memory, - phys_addr, &phys_addr, &l, false); - - res = !(memory_region_is_ram(mr) || memory_region_is_romd(mr)); - rcu_read_unlock(); - return res; -} - -int qemu_ram_foreach_block(RAMBlockIterFunc func, void *opaque) -{ - RAMBlock *block; - int ret = 0; - - rcu_read_lock(); - QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { - ret = func(block->idstr, block->host, block->offset, - block->used_length, opaque); - if (ret) { - break; - } - } - rcu_read_unlock(); - return ret; -} -#endif |