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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/arm/include/asm/xen/page.h | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/arm/include/asm/xen/page.h')
-rw-r--r-- | kernel/arch/arm/include/asm/xen/page.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/kernel/arch/arm/include/asm/xen/page.h b/kernel/arch/arm/include/asm/xen/page.h new file mode 100644 index 000000000..0b579b2f4 --- /dev/null +++ b/kernel/arch/arm/include/asm/xen/page.h @@ -0,0 +1,115 @@ +#ifndef _ASM_ARM_XEN_PAGE_H +#define _ASM_ARM_XEN_PAGE_H + +#include <asm/page.h> +#include <asm/pgtable.h> + +#include <linux/pfn.h> +#include <linux/types.h> +#include <linux/dma-mapping.h> + +#include <xen/xen.h> +#include <xen/interface/grant_table.h> + +#define phys_to_machine_mapping_valid(pfn) (1) +#define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT)) + +#define pte_mfn pte_pfn +#define mfn_pte pfn_pte + +/* Xen machine address */ +typedef struct xmaddr { + phys_addr_t maddr; +} xmaddr_t; + +/* Xen pseudo-physical address */ +typedef struct xpaddr { + phys_addr_t paddr; +} xpaddr_t; + +#define XMADDR(x) ((xmaddr_t) { .maddr = (x) }) +#define XPADDR(x) ((xpaddr_t) { .paddr = (x) }) + +#define INVALID_P2M_ENTRY (~0UL) + +unsigned long __pfn_to_mfn(unsigned long pfn); +extern struct rb_root phys_to_mach; + +static inline unsigned long pfn_to_mfn(unsigned long pfn) +{ + unsigned long mfn; + + if (phys_to_mach.rb_node != NULL) { + mfn = __pfn_to_mfn(pfn); + if (mfn != INVALID_P2M_ENTRY) + return mfn; + } + + return pfn; +} + +static inline unsigned long mfn_to_pfn(unsigned long mfn) +{ + return mfn; +} + +#define mfn_to_local_pfn(mfn) mfn_to_pfn(mfn) + +static inline xmaddr_t phys_to_machine(xpaddr_t phys) +{ + unsigned offset = phys.paddr & ~PAGE_MASK; + return XMADDR(PFN_PHYS(pfn_to_mfn(PFN_DOWN(phys.paddr))) | offset); +} + +static inline xpaddr_t machine_to_phys(xmaddr_t machine) +{ + unsigned offset = machine.maddr & ~PAGE_MASK; + return XPADDR(PFN_PHYS(mfn_to_pfn(PFN_DOWN(machine.maddr))) | offset); +} +/* VIRT <-> MACHINE conversion */ +#define virt_to_machine(v) (phys_to_machine(XPADDR(__pa(v)))) +#define virt_to_mfn(v) (pfn_to_mfn(virt_to_pfn(v))) +#define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT)) + +static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr) +{ + /* TODO: assuming it is mapped in the kernel 1:1 */ + return virt_to_machine(vaddr); +} + +/* TODO: this shouldn't be here but it is because the frontend drivers + * are using it (its rolled in headers) even though we won't hit the code path. + * So for right now just punt with this. + */ +static inline pte_t *lookup_address(unsigned long address, unsigned int *level) +{ + BUG(); + return NULL; +} + +extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops, + struct gnttab_map_grant_ref *kmap_ops, + struct page **pages, unsigned int count); + +extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops, + struct gnttab_unmap_grant_ref *kunmap_ops, + struct page **pages, unsigned int count); + +bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn); +bool __set_phys_to_machine_multi(unsigned long pfn, unsigned long mfn, + unsigned long nr_pages); + +static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn) +{ + return __set_phys_to_machine(pfn, mfn); +} + +#define xen_remap(cookie, size) ioremap_cache((cookie), (size)) +#define xen_unmap(cookie) iounmap((cookie)) + +bool xen_arch_need_swiotlb(struct device *dev, + unsigned long pfn, + unsigned long mfn); +unsigned long xen_get_swiotlb_free_pages(unsigned int order); + +#endif /* _ASM_ARM_XEN_PAGE_H */ |