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-rw-r--r--kernel/arch/s390/crypto/prng.c8
-rw-r--r--kernel/arch/s390/hypfs/hypfs_diag.c6
-rw-r--r--kernel/arch/s390/include/asm/fpu/api.h2
-rw-r--r--kernel/arch/s390/include/asm/mmu.h2
-rw-r--r--kernel/arch/s390/include/asm/mmu_context.h28
-rw-r--r--kernel/arch/s390/include/asm/pci.h3
-rw-r--r--kernel/arch/s390/include/asm/pci_dma.h2
-rw-r--r--kernel/arch/s390/include/asm/pgalloc.h4
-rw-r--r--kernel/arch/s390/include/asm/processor.h2
-rw-r--r--kernel/arch/s390/include/asm/tlbflush.h12
-rw-r--r--kernel/arch/s390/include/asm/uaccess.h8
-rw-r--r--kernel/arch/s390/kernel/entry.S106
-rw-r--r--kernel/arch/s390/kernel/head64.S2
-rw-r--r--kernel/arch/s390/kernel/ipl.c7
-rw-r--r--kernel/arch/s390/kernel/ptrace.c8
-rw-r--r--kernel/arch/s390/kernel/setup.c1
-rw-r--r--kernel/arch/s390/mm/init.c3
-rw-r--r--kernel/arch/s390/mm/mmap.c6
-rw-r--r--kernel/arch/s390/mm/pgtable.c89
-rw-r--r--kernel/arch/s390/net/bpf_jit.h4
-rw-r--r--kernel/arch/s390/net/bpf_jit_comp.c4
-rw-r--r--kernel/arch/s390/pci/pci.c8
-rw-r--r--kernel/arch/s390/pci/pci_dma.c19
23 files changed, 119 insertions, 215 deletions
diff --git a/kernel/arch/s390/crypto/prng.c b/kernel/arch/s390/crypto/prng.c
index b8045b97f..683a966b5 100644
--- a/kernel/arch/s390/crypto/prng.c
+++ b/kernel/arch/s390/crypto/prng.c
@@ -565,8 +565,10 @@ static ssize_t prng_tdes_read(struct file *file, char __user *ubuf,
prng_data->prngws.byte_counter += n;
prng_data->prngws.reseed_counter += n;
- if (copy_to_user(ubuf, prng_data->buf, chunk))
- return -EFAULT;
+ if (copy_to_user(ubuf, prng_data->buf, chunk)) {
+ ret = -EFAULT;
+ break;
+ }
nbytes -= chunk;
ret += chunk;
@@ -669,11 +671,13 @@ static const struct file_operations prng_tdes_fops = {
static struct miscdevice prng_sha512_dev = {
.name = "prandom",
.minor = MISC_DYNAMIC_MINOR,
+ .mode = 0644,
.fops = &prng_sha512_fops,
};
static struct miscdevice prng_tdes_dev = {
.name = "prandom",
.minor = MISC_DYNAMIC_MINOR,
+ .mode = 0644,
.fops = &prng_tdes_fops,
};
diff --git a/kernel/arch/s390/hypfs/hypfs_diag.c b/kernel/arch/s390/hypfs/hypfs_diag.c
index 045035796..b63b9a42a 100644
--- a/kernel/arch/s390/hypfs/hypfs_diag.c
+++ b/kernel/arch/s390/hypfs/hypfs_diag.c
@@ -525,11 +525,11 @@ static int diag224(void *ptr)
static int diag224_get_name_table(void)
{
/* memory must be below 2GB */
- diag224_cpu_names = kmalloc(PAGE_SIZE, GFP_KERNEL | GFP_DMA);
+ diag224_cpu_names = (char *) __get_free_page(GFP_KERNEL | GFP_DMA);
if (!diag224_cpu_names)
return -ENOMEM;
if (diag224(diag224_cpu_names)) {
- kfree(diag224_cpu_names);
+ free_page((unsigned long) diag224_cpu_names);
return -EOPNOTSUPP;
}
EBCASC(diag224_cpu_names + 16, (*diag224_cpu_names + 1) * 16);
@@ -538,7 +538,7 @@ static int diag224_get_name_table(void)
static void diag224_delete_name_table(void)
{
- kfree(diag224_cpu_names);
+ free_page((unsigned long) diag224_cpu_names);
}
static int diag224_idx2name(int index, char *name)
diff --git a/kernel/arch/s390/include/asm/fpu/api.h b/kernel/arch/s390/include/asm/fpu/api.h
index 5e04f3cbd..8ae236b0f 100644
--- a/kernel/arch/s390/include/asm/fpu/api.h
+++ b/kernel/arch/s390/include/asm/fpu/api.h
@@ -22,7 +22,7 @@ static inline int test_fp_ctl(u32 fpc)
" la %0,0\n"
"1:\n"
EX_TABLE(0b,1b)
- : "=d" (rc), "=d" (orig_fpc)
+ : "=d" (rc), "=&d" (orig_fpc)
: "d" (fpc), "0" (-EINVAL));
return rc;
}
diff --git a/kernel/arch/s390/include/asm/mmu.h b/kernel/arch/s390/include/asm/mmu.h
index d29ad9545..081b2ad99 100644
--- a/kernel/arch/s390/include/asm/mmu.h
+++ b/kernel/arch/s390/include/asm/mmu.h
@@ -11,7 +11,7 @@ typedef struct {
spinlock_t list_lock;
struct list_head pgtable_list;
struct list_head gmap_list;
- unsigned long asce_bits;
+ unsigned long asce;
unsigned long asce_limit;
unsigned long vdso_base;
/* The mmu context allocates 4K page tables. */
diff --git a/kernel/arch/s390/include/asm/mmu_context.h b/kernel/arch/s390/include/asm/mmu_context.h
index e485817f7..22877c944 100644
--- a/kernel/arch/s390/include/asm/mmu_context.h
+++ b/kernel/arch/s390/include/asm/mmu_context.h
@@ -26,12 +26,28 @@ static inline int init_new_context(struct task_struct *tsk,
mm->context.has_pgste = 0;
mm->context.use_skey = 0;
#endif
- if (mm->context.asce_limit == 0) {
+ switch (mm->context.asce_limit) {
+ case 1UL << 42:
+ /*
+ * forked 3-level task, fall through to set new asce with new
+ * mm->pgd
+ */
+ case 0:
/* context created by exec, set asce limit to 4TB */
- mm->context.asce_bits = _ASCE_TABLE_LENGTH |
- _ASCE_USER_BITS | _ASCE_TYPE_REGION3;
mm->context.asce_limit = STACK_TOP_MAX;
- } else if (mm->context.asce_limit == (1UL << 31)) {
+ mm->context.asce = __pa(mm->pgd) | _ASCE_TABLE_LENGTH |
+ _ASCE_USER_BITS | _ASCE_TYPE_REGION3;
+ break;
+ case 1UL << 53:
+ /* forked 4-level task, set new asce with new mm->pgd */
+ mm->context.asce = __pa(mm->pgd) | _ASCE_TABLE_LENGTH |
+ _ASCE_USER_BITS | _ASCE_TYPE_REGION2;
+ break;
+ case 1UL << 31:
+ /* forked 2-level compat task, set new asce with new mm->pgd */
+ mm->context.asce = __pa(mm->pgd) | _ASCE_TABLE_LENGTH |
+ _ASCE_USER_BITS | _ASCE_TYPE_SEGMENT;
+ /* pgd_alloc() did not increase mm->nr_pmds */
mm_inc_nr_pmds(mm);
}
crst_table_init((unsigned long *) mm->pgd, pgd_entry_type(mm));
@@ -42,7 +58,7 @@ static inline int init_new_context(struct task_struct *tsk,
static inline void set_user_asce(struct mm_struct *mm)
{
- S390_lowcore.user_asce = mm->context.asce_bits | __pa(mm->pgd);
+ S390_lowcore.user_asce = mm->context.asce;
if (current->thread.mm_segment.ar4)
__ctl_load(S390_lowcore.user_asce, 7, 7);
set_cpu_flag(CIF_ASCE);
@@ -71,7 +87,7 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
{
int cpu = smp_processor_id();
- S390_lowcore.user_asce = next->context.asce_bits | __pa(next->pgd);
+ S390_lowcore.user_asce = next->context.asce;
if (prev == next)
return;
if (MACHINE_HAS_TLB_LC)
diff --git a/kernel/arch/s390/include/asm/pci.h b/kernel/arch/s390/include/asm/pci.h
index c873e682b..6dafabb6a 100644
--- a/kernel/arch/s390/include/asm/pci.h
+++ b/kernel/arch/s390/include/asm/pci.h
@@ -45,7 +45,8 @@ struct zpci_fmb {
u64 rpcit_ops;
u64 dma_rbytes;
u64 dma_wbytes;
-} __packed __aligned(16);
+ u64 pad[2];
+} __packed __aligned(128);
enum zpci_state {
ZPCI_FN_STATE_RESERVED,
diff --git a/kernel/arch/s390/include/asm/pci_dma.h b/kernel/arch/s390/include/asm/pci_dma.h
index 1aac41e83..92df3eb8d 100644
--- a/kernel/arch/s390/include/asm/pci_dma.h
+++ b/kernel/arch/s390/include/asm/pci_dma.h
@@ -23,6 +23,8 @@ enum zpci_ioat_dtype {
#define ZPCI_IOTA_FS_2G 2
#define ZPCI_KEY (PAGE_DEFAULT_KEY << 5)
+#define ZPCI_TABLE_SIZE_RT (1UL << 42)
+
#define ZPCI_IOTA_STO_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_ST)
#define ZPCI_IOTA_RTTO_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_RT)
#define ZPCI_IOTA_RSTO_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_RS)
diff --git a/kernel/arch/s390/include/asm/pgalloc.h b/kernel/arch/s390/include/asm/pgalloc.h
index d7cc79fb6..5991cdcb5 100644
--- a/kernel/arch/s390/include/asm/pgalloc.h
+++ b/kernel/arch/s390/include/asm/pgalloc.h
@@ -56,8 +56,8 @@ static inline unsigned long pgd_entry_type(struct mm_struct *mm)
return _REGION2_ENTRY_EMPTY;
}
-int crst_table_upgrade(struct mm_struct *, unsigned long limit);
-void crst_table_downgrade(struct mm_struct *, unsigned long limit);
+int crst_table_upgrade(struct mm_struct *);
+void crst_table_downgrade(struct mm_struct *);
static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
{
diff --git a/kernel/arch/s390/include/asm/processor.h b/kernel/arch/s390/include/asm/processor.h
index b16c3d0a1..c1ea67db8 100644
--- a/kernel/arch/s390/include/asm/processor.h
+++ b/kernel/arch/s390/include/asm/processor.h
@@ -163,7 +163,7 @@ extern __vector128 init_task_fpu_regs[__NUM_VXRS];
regs->psw.mask = PSW_USER_BITS | PSW_MASK_BA; \
regs->psw.addr = new_psw | PSW_ADDR_AMODE; \
regs->gprs[15] = new_stackp; \
- crst_table_downgrade(current->mm, 1UL << 31); \
+ crst_table_downgrade(current->mm); \
execve_tail(); \
} while (0)
diff --git a/kernel/arch/s390/include/asm/tlbflush.h b/kernel/arch/s390/include/asm/tlbflush.h
index ca148f7c3..0a2031618 100644
--- a/kernel/arch/s390/include/asm/tlbflush.h
+++ b/kernel/arch/s390/include/asm/tlbflush.h
@@ -81,7 +81,8 @@ static inline void __tlb_flush_full(struct mm_struct *mm)
}
/*
- * Flush TLB entries for a specific ASCE on all CPUs.
+ * Flush TLB entries for a specific ASCE on all CPUs. Should never be used
+ * when more than one asce (e.g. gmap) ran on this mm.
*/
static inline void __tlb_flush_asce(struct mm_struct *mm, unsigned long asce)
{
@@ -110,8 +111,7 @@ static inline void __tlb_flush_asce(struct mm_struct *mm, unsigned long asce)
static inline void __tlb_flush_kernel(void)
{
if (MACHINE_HAS_IDTE)
- __tlb_flush_idte((unsigned long) init_mm.pgd |
- init_mm.context.asce_bits);
+ __tlb_flush_idte(init_mm.context.asce);
else
__tlb_flush_global();
}
@@ -133,8 +133,7 @@ static inline void __tlb_flush_asce(struct mm_struct *mm, unsigned long asce)
static inline void __tlb_flush_kernel(void)
{
if (MACHINE_HAS_TLB_LC)
- __tlb_flush_idte_local((unsigned long) init_mm.pgd |
- init_mm.context.asce_bits);
+ __tlb_flush_idte_local(init_mm.context.asce);
else
__tlb_flush_local();
}
@@ -148,8 +147,7 @@ static inline void __tlb_flush_mm(struct mm_struct * mm)
* only ran on the local cpu.
*/
if (MACHINE_HAS_IDTE && list_empty(&mm->context.gmap_list))
- __tlb_flush_asce(mm, (unsigned long) mm->pgd |
- mm->context.asce_bits);
+ __tlb_flush_asce(mm, mm->context.asce);
else
__tlb_flush_full(mm);
}
diff --git a/kernel/arch/s390/include/asm/uaccess.h b/kernel/arch/s390/include/asm/uaccess.h
index 9dd4cc47d..5c7381c5a 100644
--- a/kernel/arch/s390/include/asm/uaccess.h
+++ b/kernel/arch/s390/include/asm/uaccess.h
@@ -215,28 +215,28 @@ int __put_user_bad(void) __attribute__((noreturn));
__chk_user_ptr(ptr); \
switch (sizeof(*(ptr))) { \
case 1: { \
- unsigned char __x; \
+ unsigned char __x = 0; \
__gu_err = __get_user_fn(&__x, ptr, \
sizeof(*(ptr))); \
(x) = *(__force __typeof__(*(ptr)) *) &__x; \
break; \
}; \
case 2: { \
- unsigned short __x; \
+ unsigned short __x = 0; \
__gu_err = __get_user_fn(&__x, ptr, \
sizeof(*(ptr))); \
(x) = *(__force __typeof__(*(ptr)) *) &__x; \
break; \
}; \
case 4: { \
- unsigned int __x; \
+ unsigned int __x = 0; \
__gu_err = __get_user_fn(&__x, ptr, \
sizeof(*(ptr))); \
(x) = *(__force __typeof__(*(ptr)) *) &__x; \
break; \
}; \
case 8: { \
- unsigned long long __x; \
+ unsigned long long __x = 0; \
__gu_err = __get_user_fn(&__x, ptr, \
sizeof(*(ptr))); \
(x) = *(__force __typeof__(*(ptr)) *) &__x; \
diff --git a/kernel/arch/s390/kernel/entry.S b/kernel/arch/s390/kernel/entry.S
index 857b6526d..424e6809a 100644
--- a/kernel/arch/s390/kernel/entry.S
+++ b/kernel/arch/s390/kernel/entry.S
@@ -1197,114 +1197,12 @@ cleanup_critical:
.quad .Lpsw_idle_lpsw
.Lcleanup_save_fpu_regs:
- TSTMSK __LC_CPU_FLAGS,_CIF_FPU
- bor %r14
- clg %r9,BASED(.Lcleanup_save_fpu_regs_done)
- jhe 5f
- clg %r9,BASED(.Lcleanup_save_fpu_regs_fp)
- jhe 4f
- clg %r9,BASED(.Lcleanup_save_fpu_regs_vx_high)
- jhe 3f
- clg %r9,BASED(.Lcleanup_save_fpu_regs_vx_low)
- jhe 2f
- clg %r9,BASED(.Lcleanup_save_fpu_fpc_end)
- jhe 1f
- lg %r2,__LC_CURRENT
- aghi %r2,__TASK_thread
-0: # Store floating-point controls
- stfpc __THREAD_FPU_fpc(%r2)
-1: # Load register save area and check if VX is active
- lg %r3,__THREAD_FPU_regs(%r2)
- TSTMSK __LC_MACHINE_FLAGS,MACHINE_FLAG_VX
- jz 4f # no VX -> store FP regs
-2: # Store vector registers (V0-V15)
- VSTM %v0,%v15,0,%r3 # vstm 0,15,0(3)
-3: # Store vector registers (V16-V31)
- VSTM %v16,%v31,256,%r3 # vstm 16,31,256(3)
- j 5f # -> done, set CIF_FPU flag
-4: # Store floating-point registers
- std 0,0(%r3)
- std 1,8(%r3)
- std 2,16(%r3)
- std 3,24(%r3)
- std 4,32(%r3)
- std 5,40(%r3)
- std 6,48(%r3)
- std 7,56(%r3)
- std 8,64(%r3)
- std 9,72(%r3)
- std 10,80(%r3)
- std 11,88(%r3)
- std 12,96(%r3)
- std 13,104(%r3)
- std 14,112(%r3)
- std 15,120(%r3)
-5: # Set CIF_FPU flag
- oi __LC_CPU_FLAGS+7,_CIF_FPU
- lg %r9,48(%r11) # return from save_fpu_regs
+ larl %r9,save_fpu_regs
br %r14
-.Lcleanup_save_fpu_fpc_end:
- .quad .Lsave_fpu_regs_fpc_end
-.Lcleanup_save_fpu_regs_vx_low:
- .quad .Lsave_fpu_regs_vx_low
-.Lcleanup_save_fpu_regs_vx_high:
- .quad .Lsave_fpu_regs_vx_high
-.Lcleanup_save_fpu_regs_fp:
- .quad .Lsave_fpu_regs_fp
-.Lcleanup_save_fpu_regs_done:
- .quad .Lsave_fpu_regs_done
.Lcleanup_load_fpu_regs:
- TSTMSK __LC_CPU_FLAGS,_CIF_FPU
- bnor %r14
- clg %r9,BASED(.Lcleanup_load_fpu_regs_done)
- jhe 1f
- clg %r9,BASED(.Lcleanup_load_fpu_regs_fp)
- jhe 2f
- clg %r9,BASED(.Lcleanup_load_fpu_regs_vx_high)
- jhe 3f
- clg %r9,BASED(.Lcleanup_load_fpu_regs_vx)
- jhe 4f
- lg %r4,__LC_CURRENT
- aghi %r4,__TASK_thread
- lfpc __THREAD_FPU_fpc(%r4)
- TSTMSK __LC_MACHINE_FLAGS,MACHINE_FLAG_VX
- lg %r4,__THREAD_FPU_regs(%r4) # %r4 <- reg save area
- jz 2f # -> no VX, load FP regs
-4: # Load V0 ..V15 registers
- VLM %v0,%v15,0,%r4
-3: # Load V16..V31 registers
- VLM %v16,%v31,256,%r4
- j 1f
-2: # Load floating-point registers
- ld 0,0(%r4)
- ld 1,8(%r4)
- ld 2,16(%r4)
- ld 3,24(%r4)
- ld 4,32(%r4)
- ld 5,40(%r4)
- ld 6,48(%r4)
- ld 7,56(%r4)
- ld 8,64(%r4)
- ld 9,72(%r4)
- ld 10,80(%r4)
- ld 11,88(%r4)
- ld 12,96(%r4)
- ld 13,104(%r4)
- ld 14,112(%r4)
- ld 15,120(%r4)
-1: # Clear CIF_FPU bit
- ni __LC_CPU_FLAGS+7,255-_CIF_FPU
- lg %r9,48(%r11) # return from load_fpu_regs
+ larl %r9,load_fpu_regs
br %r14
-.Lcleanup_load_fpu_regs_vx:
- .quad .Lload_fpu_regs_vx
-.Lcleanup_load_fpu_regs_vx_high:
- .quad .Lload_fpu_regs_vx_high
-.Lcleanup_load_fpu_regs_fp:
- .quad .Lload_fpu_regs_fp
-.Lcleanup_load_fpu_regs_done:
- .quad .Lload_fpu_regs_done
/*
* Integer constants
diff --git a/kernel/arch/s390/kernel/head64.S b/kernel/arch/s390/kernel/head64.S
index 58b719fa8..1ad2407c7 100644
--- a/kernel/arch/s390/kernel/head64.S
+++ b/kernel/arch/s390/kernel/head64.S
@@ -16,7 +16,7 @@
__HEAD
ENTRY(startup_continue)
- tm __LC_STFL_FAC_LIST+6,0x80 # LPP available ?
+ tm __LC_STFL_FAC_LIST+5,0x80 # LPP available ?
jz 0f
xc __LC_LPP+1(7,0),__LC_LPP+1 # clear lpp and current_pid
mvi __LC_LPP,0x80 # and set LPP_MAGIC
diff --git a/kernel/arch/s390/kernel/ipl.c b/kernel/arch/s390/kernel/ipl.c
index b1f0a90f9..42570d8fb 100644
--- a/kernel/arch/s390/kernel/ipl.c
+++ b/kernel/arch/s390/kernel/ipl.c
@@ -2070,13 +2070,6 @@ void s390_reset_system(void (*fn_pre)(void),
S390_lowcore.program_new_psw.addr =
PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
- /*
- * Clear subchannel ID and number to signal new kernel that no CCW or
- * SCSI IPL has been done (for kexec and kdump)
- */
- S390_lowcore.subchannel_id = 0;
- S390_lowcore.subchannel_nr = 0;
-
/* Store status at absolute zero */
store_status();
diff --git a/kernel/arch/s390/kernel/ptrace.c b/kernel/arch/s390/kernel/ptrace.c
index 01c37b36c..02bd587b6 100644
--- a/kernel/arch/s390/kernel/ptrace.c
+++ b/kernel/arch/s390/kernel/ptrace.c
@@ -963,6 +963,11 @@ static int s390_fpregs_set(struct task_struct *target,
if (target == current)
save_fpu_regs();
+ if (MACHINE_HAS_VX)
+ convert_vx_to_fp(fprs, target->thread.fpu.vxrs);
+ else
+ memcpy(&fprs, target->thread.fpu.fprs, sizeof(fprs));
+
/* If setting FPC, must validate it first. */
if (count > 0 && pos < offsetof(s390_fp_regs, fprs)) {
u32 ufpc[2] = { target->thread.fpu.fpc, 0 };
@@ -1067,6 +1072,9 @@ static int s390_vxrs_low_set(struct task_struct *target,
if (target == current)
save_fpu_regs();
+ for (i = 0; i < __NUM_VXRS_LOW; i++)
+ vxrs[i] = *((__u64 *)(target->thread.fpu.vxrs + i) + 1);
+
rc = user_regset_copyin(&pos, &count, &kbuf, &ubuf, vxrs, 0, -1);
if (rc == 0)
for (i = 0; i < __NUM_VXRS_LOW; i++)
diff --git a/kernel/arch/s390/kernel/setup.c b/kernel/arch/s390/kernel/setup.c
index c837bcacf..1f581eb61 100644
--- a/kernel/arch/s390/kernel/setup.c
+++ b/kernel/arch/s390/kernel/setup.c
@@ -329,6 +329,7 @@ static void __init setup_lowcore(void)
+ PAGE_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs);
lc->current_task = (unsigned long) init_thread_union.thread_info.task;
lc->thread_info = (unsigned long) &init_thread_union;
+ lc->lpp = LPP_MAGIC;
lc->machine_flags = S390_lowcore.machine_flags;
lc->stfl_fac_list = S390_lowcore.stfl_fac_list;
memcpy(lc->stfle_fac_list, S390_lowcore.stfle_fac_list,
diff --git a/kernel/arch/s390/mm/init.c b/kernel/arch/s390/mm/init.c
index c722400c7..feff9caf8 100644
--- a/kernel/arch/s390/mm/init.c
+++ b/kernel/arch/s390/mm/init.c
@@ -89,7 +89,8 @@ void __init paging_init(void)
asce_bits = _ASCE_TYPE_REGION3 | _ASCE_TABLE_LENGTH;
pgd_type = _REGION3_ENTRY_EMPTY;
}
- S390_lowcore.kernel_asce = (__pa(init_mm.pgd) & PAGE_MASK) | asce_bits;
+ init_mm.context.asce = (__pa(init_mm.pgd) & PAGE_MASK) | asce_bits;
+ S390_lowcore.kernel_asce = init_mm.context.asce;
clear_table((unsigned long *) init_mm.pgd, pgd_type,
sizeof(unsigned long)*2048);
vmem_map_init();
diff --git a/kernel/arch/s390/mm/mmap.c b/kernel/arch/s390/mm/mmap.c
index ea01477b4..f2b6b1d9c 100644
--- a/kernel/arch/s390/mm/mmap.c
+++ b/kernel/arch/s390/mm/mmap.c
@@ -174,7 +174,7 @@ int s390_mmap_check(unsigned long addr, unsigned long len, unsigned long flags)
if (!(flags & MAP_FIXED))
addr = 0;
if ((addr + len) >= TASK_SIZE)
- return crst_table_upgrade(current->mm, 1UL << 53);
+ return crst_table_upgrade(current->mm);
return 0;
}
@@ -191,7 +191,7 @@ s390_get_unmapped_area(struct file *filp, unsigned long addr,
return area;
if (area == -ENOMEM && !is_compat_task() && TASK_SIZE < (1UL << 53)) {
/* Upgrade the page table to 4 levels and retry. */
- rc = crst_table_upgrade(mm, 1UL << 53);
+ rc = crst_table_upgrade(mm);
if (rc)
return (unsigned long) rc;
area = arch_get_unmapped_area(filp, addr, len, pgoff, flags);
@@ -213,7 +213,7 @@ s390_get_unmapped_area_topdown(struct file *filp, const unsigned long addr,
return area;
if (area == -ENOMEM && !is_compat_task() && TASK_SIZE < (1UL << 53)) {
/* Upgrade the page table to 4 levels and retry. */
- rc = crst_table_upgrade(mm, 1UL << 53);
+ rc = crst_table_upgrade(mm);
if (rc)
return (unsigned long) rc;
area = arch_get_unmapped_area_topdown(filp, addr, len,
diff --git a/kernel/arch/s390/mm/pgtable.c b/kernel/arch/s390/mm/pgtable.c
index 54ef3bc01..8345ae1f1 100644
--- a/kernel/arch/s390/mm/pgtable.c
+++ b/kernel/arch/s390/mm/pgtable.c
@@ -49,81 +49,52 @@ static void __crst_table_upgrade(void *arg)
__tlb_flush_local();
}
-int crst_table_upgrade(struct mm_struct *mm, unsigned long limit)
+int crst_table_upgrade(struct mm_struct *mm)
{
unsigned long *table, *pgd;
- unsigned long entry;
- int flush;
- BUG_ON(limit > (1UL << 53));
- flush = 0;
-repeat:
+ /* upgrade should only happen from 3 to 4 levels */
+ BUG_ON(mm->context.asce_limit != (1UL << 42));
+
table = crst_table_alloc(mm);
if (!table)
return -ENOMEM;
+
spin_lock_bh(&mm->page_table_lock);
- if (mm->context.asce_limit < limit) {
- pgd = (unsigned long *) mm->pgd;
- if (mm->context.asce_limit <= (1UL << 31)) {
- entry = _REGION3_ENTRY_EMPTY;
- mm->context.asce_limit = 1UL << 42;
- mm->context.asce_bits = _ASCE_TABLE_LENGTH |
- _ASCE_USER_BITS |
- _ASCE_TYPE_REGION3;
- } else {
- entry = _REGION2_ENTRY_EMPTY;
- mm->context.asce_limit = 1UL << 53;
- mm->context.asce_bits = _ASCE_TABLE_LENGTH |
- _ASCE_USER_BITS |
- _ASCE_TYPE_REGION2;
- }
- crst_table_init(table, entry);
- pgd_populate(mm, (pgd_t *) table, (pud_t *) pgd);
- mm->pgd = (pgd_t *) table;
- mm->task_size = mm->context.asce_limit;
- table = NULL;
- flush = 1;
- }
+ pgd = (unsigned long *) mm->pgd;
+ crst_table_init(table, _REGION2_ENTRY_EMPTY);
+ pgd_populate(mm, (pgd_t *) table, (pud_t *) pgd);
+ mm->pgd = (pgd_t *) table;
+ mm->context.asce_limit = 1UL << 53;
+ mm->context.asce = __pa(mm->pgd) | _ASCE_TABLE_LENGTH |
+ _ASCE_USER_BITS | _ASCE_TYPE_REGION2;
+ mm->task_size = mm->context.asce_limit;
spin_unlock_bh(&mm->page_table_lock);
- if (table)
- crst_table_free(mm, table);
- if (mm->context.asce_limit < limit)
- goto repeat;
- if (flush)
- on_each_cpu(__crst_table_upgrade, mm, 0);
+
+ on_each_cpu(__crst_table_upgrade, mm, 0);
return 0;
}
-void crst_table_downgrade(struct mm_struct *mm, unsigned long limit)
+void crst_table_downgrade(struct mm_struct *mm)
{
pgd_t *pgd;
+ /* downgrade should only happen from 3 to 2 levels (compat only) */
+ BUG_ON(mm->context.asce_limit != (1UL << 42));
+
if (current->active_mm == mm) {
clear_user_asce();
__tlb_flush_mm(mm);
}
- while (mm->context.asce_limit > limit) {
- pgd = mm->pgd;
- switch (pgd_val(*pgd) & _REGION_ENTRY_TYPE_MASK) {
- case _REGION_ENTRY_TYPE_R2:
- mm->context.asce_limit = 1UL << 42;
- mm->context.asce_bits = _ASCE_TABLE_LENGTH |
- _ASCE_USER_BITS |
- _ASCE_TYPE_REGION3;
- break;
- case _REGION_ENTRY_TYPE_R3:
- mm->context.asce_limit = 1UL << 31;
- mm->context.asce_bits = _ASCE_TABLE_LENGTH |
- _ASCE_USER_BITS |
- _ASCE_TYPE_SEGMENT;
- break;
- default:
- BUG();
- }
- mm->pgd = (pgd_t *) (pgd_val(*pgd) & _REGION_ENTRY_ORIGIN);
- mm->task_size = mm->context.asce_limit;
- crst_table_free(mm, (unsigned long *) pgd);
- }
+
+ pgd = mm->pgd;
+ mm->pgd = (pgd_t *) (pgd_val(*pgd) & _REGION_ENTRY_ORIGIN);
+ mm->context.asce_limit = 1UL << 31;
+ mm->context.asce = __pa(mm->pgd) | _ASCE_TABLE_LENGTH |
+ _ASCE_USER_BITS | _ASCE_TYPE_SEGMENT;
+ mm->task_size = mm->context.asce_limit;
+ crst_table_free(mm, (unsigned long *) pgd);
+
if (current->active_mm == mm)
set_user_asce(mm);
}
@@ -195,7 +166,7 @@ EXPORT_SYMBOL_GPL(gmap_alloc);
static void gmap_flush_tlb(struct gmap *gmap)
{
if (MACHINE_HAS_IDTE)
- __tlb_flush_asce(gmap->mm, gmap->asce);
+ __tlb_flush_idte(gmap->asce);
else
__tlb_flush_global();
}
@@ -234,7 +205,7 @@ void gmap_free(struct gmap *gmap)
/* Flush tlb. */
if (MACHINE_HAS_IDTE)
- __tlb_flush_asce(gmap->mm, gmap->asce);
+ __tlb_flush_idte(gmap->asce);
else
__tlb_flush_global();
diff --git a/kernel/arch/s390/net/bpf_jit.h b/kernel/arch/s390/net/bpf_jit.h
index f010c93a8..fda605dbc 100644
--- a/kernel/arch/s390/net/bpf_jit.h
+++ b/kernel/arch/s390/net/bpf_jit.h
@@ -37,7 +37,7 @@ extern u8 sk_load_word[], sk_load_half[], sk_load_byte[];
* | | |
* +---------------+ |
* | 8 byte skbp | |
- * R15+170 -> +---------------+ |
+ * R15+176 -> +---------------+ |
* | 8 byte hlen | |
* R15+168 -> +---------------+ |
* | 4 byte align | |
@@ -58,7 +58,7 @@ extern u8 sk_load_word[], sk_load_half[], sk_load_byte[];
#define STK_OFF (STK_SPACE - STK_160_UNUSED)
#define STK_OFF_TMP 160 /* Offset of tmp buffer on stack */
#define STK_OFF_HLEN 168 /* Offset of SKB header length on stack */
-#define STK_OFF_SKBP 170 /* Offset of SKB pointer on stack */
+#define STK_OFF_SKBP 176 /* Offset of SKB pointer on stack */
#define STK_OFF_R6 (160 - 11 * 8) /* Offset of r6 on stack */
#define STK_OFF_TCCNT (160 - 12 * 8) /* Offset of tail_call_cnt on stack */
diff --git a/kernel/arch/s390/net/bpf_jit_comp.c b/kernel/arch/s390/net/bpf_jit_comp.c
index 9a0c4c22e..0e2919dd8 100644
--- a/kernel/arch/s390/net/bpf_jit_comp.c
+++ b/kernel/arch/s390/net/bpf_jit_comp.c
@@ -45,7 +45,7 @@ struct bpf_jit {
int labels[1]; /* Labels for local jumps */
};
-#define BPF_SIZE_MAX 0x7ffff /* Max size for program (20 bit signed displ) */
+#define BPF_SIZE_MAX 0xffff /* Max size for program (16 bit branches) */
#define SEEN_SKB 1 /* skb access */
#define SEEN_MEM 2 /* use mem[] for temporary storage */
@@ -446,7 +446,7 @@ static void bpf_jit_prologue(struct bpf_jit *jit, bool is_classic)
emit_load_skb_data_hlen(jit);
if (jit->seen & SEEN_SKB_CHANGE)
/* stg %b1,ST_OFF_SKBP(%r0,%r15) */
- EMIT6_DISP_LH(0xe3000000, 0x0024, REG_W1, REG_0, REG_15,
+ EMIT6_DISP_LH(0xe3000000, 0x0024, BPF_REG_1, REG_0, REG_15,
STK_OFF_SKBP);
/* Clear A (%b0) and X (%b7) registers for converted BPF programs */
if (is_classic) {
diff --git a/kernel/arch/s390/pci/pci.c b/kernel/arch/s390/pci/pci.c
index 7ef12a3ac..f2f6720a3 100644
--- a/kernel/arch/s390/pci/pci.c
+++ b/kernel/arch/s390/pci/pci.c
@@ -701,8 +701,7 @@ static int zpci_restore(struct device *dev)
goto out;
zpci_map_resources(pdev);
- zpci_register_ioat(zdev, 0, zdev->start_dma + PAGE_OFFSET,
- zdev->start_dma + zdev->iommu_size - 1,
+ zpci_register_ioat(zdev, 0, zdev->start_dma, zdev->end_dma,
(u64) zdev->dma_table);
out:
@@ -871,8 +870,11 @@ static inline int barsize(u8 size)
static int zpci_mem_init(void)
{
+ BUILD_BUG_ON(!is_power_of_2(__alignof__(struct zpci_fmb)) ||
+ __alignof__(struct zpci_fmb) < sizeof(struct zpci_fmb));
+
zdev_fmb_cache = kmem_cache_create("PCI_FMB_cache", sizeof(struct zpci_fmb),
- 16, 0, NULL);
+ __alignof__(struct zpci_fmb), 0, NULL);
if (!zdev_fmb_cache)
goto error_zdev;
diff --git a/kernel/arch/s390/pci/pci_dma.c b/kernel/arch/s390/pci/pci_dma.c
index d348f2c09..3a40f718b 100644
--- a/kernel/arch/s390/pci/pci_dma.c
+++ b/kernel/arch/s390/pci/pci_dma.c
@@ -458,7 +458,19 @@ int zpci_dma_init_device(struct zpci_dev *zdev)
goto out_clean;
}
- zdev->iommu_size = (unsigned long) high_memory - PAGE_OFFSET;
+ /*
+ * Restrict the iommu bitmap size to the minimum of the following:
+ * - main memory size
+ * - 3-level pagetable address limit minus start_dma offset
+ * - DMA address range allowed by the hardware (clp query pci fn)
+ *
+ * Also set zdev->end_dma to the actual end address of the usable
+ * range, instead of the theoretical maximum as reported by hardware.
+ */
+ zdev->iommu_size = min3((u64) high_memory,
+ ZPCI_TABLE_SIZE_RT - zdev->start_dma,
+ zdev->end_dma - zdev->start_dma + 1);
+ zdev->end_dma = zdev->start_dma + zdev->iommu_size - 1;
zdev->iommu_pages = zdev->iommu_size >> PAGE_SHIFT;
zdev->iommu_bitmap = vzalloc(zdev->iommu_pages / 8);
if (!zdev->iommu_bitmap) {
@@ -466,10 +478,7 @@ int zpci_dma_init_device(struct zpci_dev *zdev)
goto out_reg;
}
- rc = zpci_register_ioat(zdev,
- 0,
- zdev->start_dma + PAGE_OFFSET,
- zdev->start_dma + zdev->iommu_size - 1,
+ rc = zpci_register_ioat(zdev, 0, zdev->start_dma, zdev->end_dma,
(u64) zdev->dma_table);
if (rc)
goto out_reg;