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-rw-r--r--arch/powerpc/include/asm/book3s/32/pgtable.h1
-rw-r--r--arch/powerpc/include/asm/book3s/64/pgtable.h88
-rw-r--r--arch/powerpc/include/asm/nohash/32/pgtable.h1
-rw-r--r--arch/powerpc/include/asm/nohash/64/pgtable-4k.h3
-rw-r--r--arch/powerpc/include/asm/nohash/64/pgtable-64k.h1
-rw-r--r--arch/powerpc/kvm/book3s_64_mmu_hv.c2
-rw-r--r--arch/powerpc/kvm/book3s_hv_rm_mmu.c2
-rw-r--r--arch/powerpc/purgatory/trampoline.S12
-rw-r--r--arch/powerpc/sysdev/axonram.c5
9 files changed, 76 insertions, 39 deletions
diff --git a/arch/powerpc/include/asm/book3s/32/pgtable.h b/arch/powerpc/include/asm/book3s/32/pgtable.h
index 012223638815..26ed228d4dc6 100644
--- a/arch/powerpc/include/asm/book3s/32/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/32/pgtable.h
@@ -1,6 +1,7 @@
#ifndef _ASM_POWERPC_BOOK3S_32_PGTABLE_H
#define _ASM_POWERPC_BOOK3S_32_PGTABLE_H
+#define __ARCH_USE_5LEVEL_HACK
#include <asm-generic/pgtable-nopmd.h>
#include <asm/book3s/32/hash.h>
diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
index 1eeeb72c7015..8f4d41936e5a 100644
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -1,9 +1,12 @@
#ifndef _ASM_POWERPC_BOOK3S_64_PGTABLE_H_
#define _ASM_POWERPC_BOOK3S_64_PGTABLE_H_
+#include <asm-generic/5level-fixup.h>
+
#ifndef __ASSEMBLY__
#include <linux/mmdebug.h>
#endif
+
/*
* Common bits between hash and Radix page table
*/
@@ -347,23 +350,58 @@ static inline int __ptep_test_and_clear_young(struct mm_struct *mm,
__r; \
})
+static inline int __pte_write(pte_t pte)
+{
+ return !!(pte_raw(pte) & cpu_to_be64(_PAGE_WRITE));
+}
+
+#ifdef CONFIG_NUMA_BALANCING
+#define pte_savedwrite pte_savedwrite
+static inline bool pte_savedwrite(pte_t pte)
+{
+ /*
+ * Saved write ptes are prot none ptes that doesn't have
+ * privileged bit sit. We mark prot none as one which has
+ * present and pviliged bit set and RWX cleared. To mark
+ * protnone which used to have _PAGE_WRITE set we clear
+ * the privileged bit.
+ */
+ return !(pte_raw(pte) & cpu_to_be64(_PAGE_RWX | _PAGE_PRIVILEGED));
+}
+#else
+#define pte_savedwrite pte_savedwrite
+static inline bool pte_savedwrite(pte_t pte)
+{
+ return false;
+}
+#endif
+
+static inline int pte_write(pte_t pte)
+{
+ return __pte_write(pte) || pte_savedwrite(pte);
+}
+
#define __HAVE_ARCH_PTEP_SET_WRPROTECT
static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
pte_t *ptep)
{
- if ((pte_raw(*ptep) & cpu_to_be64(_PAGE_WRITE)) == 0)
- return;
-
- pte_update(mm, addr, ptep, _PAGE_WRITE, 0, 0);
+ if (__pte_write(*ptep))
+ pte_update(mm, addr, ptep, _PAGE_WRITE, 0, 0);
+ else if (unlikely(pte_savedwrite(*ptep)))
+ pte_update(mm, addr, ptep, 0, _PAGE_PRIVILEGED, 0);
}
static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
unsigned long addr, pte_t *ptep)
{
- if ((pte_raw(*ptep) & cpu_to_be64(_PAGE_WRITE)) == 0)
- return;
-
- pte_update(mm, addr, ptep, _PAGE_WRITE, 0, 1);
+ /*
+ * We should not find protnone for hugetlb, but this complete the
+ * interface.
+ */
+ if (__pte_write(*ptep))
+ pte_update(mm, addr, ptep, _PAGE_WRITE, 0, 1);
+ else if (unlikely(pte_savedwrite(*ptep)))
+ pte_update(mm, addr, ptep, 0, _PAGE_PRIVILEGED, 1);
}
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
@@ -397,11 +435,6 @@ static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
pte_update(mm, addr, ptep, ~0UL, 0, 0);
}
-static inline int pte_write(pte_t pte)
-{
- return !!(pte_raw(pte) & cpu_to_be64(_PAGE_WRITE));
-}
-
static inline int pte_dirty(pte_t pte)
{
return !!(pte_raw(pte) & cpu_to_be64(_PAGE_DIRTY));
@@ -465,19 +498,12 @@ static inline pte_t pte_clear_savedwrite(pte_t pte)
VM_BUG_ON(!pte_protnone(pte));
return __pte(pte_val(pte) | _PAGE_PRIVILEGED);
}
-
-#define pte_savedwrite pte_savedwrite
-static inline bool pte_savedwrite(pte_t pte)
+#else
+#define pte_clear_savedwrite pte_clear_savedwrite
+static inline pte_t pte_clear_savedwrite(pte_t pte)
{
- /*
- * Saved write ptes are prot none ptes that doesn't have
- * privileged bit sit. We mark prot none as one which has
- * present and pviliged bit set and RWX cleared. To mark
- * protnone which used to have _PAGE_WRITE set we clear
- * the privileged bit.
- */
- VM_BUG_ON(!pte_protnone(pte));
- return !(pte_raw(pte) & cpu_to_be64(_PAGE_RWX | _PAGE_PRIVILEGED));
+ VM_WARN_ON(1);
+ return __pte(pte_val(pte) & ~_PAGE_WRITE);
}
#endif /* CONFIG_NUMA_BALANCING */
@@ -506,6 +532,8 @@ static inline unsigned long pte_pfn(pte_t pte)
/* Generic modifiers for PTE bits */
static inline pte_t pte_wrprotect(pte_t pte)
{
+ if (unlikely(pte_savedwrite(pte)))
+ return pte_clear_savedwrite(pte);
return __pte(pte_val(pte) & ~_PAGE_WRITE);
}
@@ -926,6 +954,7 @@ static inline int pmd_protnone(pmd_t pmd)
#define __HAVE_ARCH_PMD_WRITE
#define pmd_write(pmd) pte_write(pmd_pte(pmd))
+#define __pmd_write(pmd) __pte_write(pmd_pte(pmd))
#define pmd_savedwrite(pmd) pte_savedwrite(pmd_pte(pmd))
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
@@ -982,11 +1011,10 @@ static inline int __pmdp_test_and_clear_young(struct mm_struct *mm,
static inline void pmdp_set_wrprotect(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp)
{
-
- if ((pmd_raw(*pmdp) & cpu_to_be64(_PAGE_WRITE)) == 0)
- return;
-
- pmd_hugepage_update(mm, addr, pmdp, _PAGE_WRITE, 0);
+ if (__pmd_write((*pmdp)))
+ pmd_hugepage_update(mm, addr, pmdp, _PAGE_WRITE, 0);
+ else if (unlikely(pmd_savedwrite(*pmdp)))
+ pmd_hugepage_update(mm, addr, pmdp, 0, _PAGE_PRIVILEGED);
}
static inline int pmd_trans_huge(pmd_t pmd)
diff --git a/arch/powerpc/include/asm/nohash/32/pgtable.h b/arch/powerpc/include/asm/nohash/32/pgtable.h
index ba9921bf202e..5134ade2e850 100644
--- a/arch/powerpc/include/asm/nohash/32/pgtable.h
+++ b/arch/powerpc/include/asm/nohash/32/pgtable.h
@@ -1,6 +1,7 @@
#ifndef _ASM_POWERPC_NOHASH_32_PGTABLE_H
#define _ASM_POWERPC_NOHASH_32_PGTABLE_H
+#define __ARCH_USE_5LEVEL_HACK
#include <asm-generic/pgtable-nopmd.h>
#ifndef __ASSEMBLY__
diff --git a/arch/powerpc/include/asm/nohash/64/pgtable-4k.h b/arch/powerpc/include/asm/nohash/64/pgtable-4k.h
index d0db98793dd8..9f4de0a1035e 100644
--- a/arch/powerpc/include/asm/nohash/64/pgtable-4k.h
+++ b/arch/powerpc/include/asm/nohash/64/pgtable-4k.h
@@ -1,5 +1,8 @@
#ifndef _ASM_POWERPC_NOHASH_64_PGTABLE_4K_H
#define _ASM_POWERPC_NOHASH_64_PGTABLE_4K_H
+
+#include <asm-generic/5level-fixup.h>
+
/*
* Entries per page directory level. The PTE level must use a 64b record
* for each page table entry. The PMD and PGD level use a 32b record for
diff --git a/arch/powerpc/include/asm/nohash/64/pgtable-64k.h b/arch/powerpc/include/asm/nohash/64/pgtable-64k.h
index 55b28ef3409a..1facb584dd29 100644
--- a/arch/powerpc/include/asm/nohash/64/pgtable-64k.h
+++ b/arch/powerpc/include/asm/nohash/64/pgtable-64k.h
@@ -1,6 +1,7 @@
#ifndef _ASM_POWERPC_NOHASH_64_PGTABLE_64K_H
#define _ASM_POWERPC_NOHASH_64_PGTABLE_64K_H
+#define __ARCH_USE_5LEVEL_HACK
#include <asm-generic/pgtable-nopud.h>
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index f3158fb16de3..8c68145ba1bd 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c
@@ -601,7 +601,7 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu,
hva, NULL, NULL);
if (ptep) {
pte = kvmppc_read_update_linux_pte(ptep, 1);
- if (pte_write(pte))
+ if (__pte_write(pte))
write_ok = 1;
}
local_irq_restore(flags);
diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
index 6fca970373ee..ce6f2121fffe 100644
--- a/arch/powerpc/kvm/book3s_hv_rm_mmu.c
+++ b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
@@ -256,7 +256,7 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
}
pte = kvmppc_read_update_linux_pte(ptep, writing);
if (pte_present(pte) && !pte_protnone(pte)) {
- if (writing && !pte_write(pte))
+ if (writing && !__pte_write(pte))
/* make the actual HPTE be read-only */
ptel = hpte_make_readonly(ptel);
is_ci = pte_ci(pte);
diff --git a/arch/powerpc/purgatory/trampoline.S b/arch/powerpc/purgatory/trampoline.S
index f9760ccf4032..3696ea6c4826 100644
--- a/arch/powerpc/purgatory/trampoline.S
+++ b/arch/powerpc/purgatory/trampoline.S
@@ -116,13 +116,13 @@ dt_offset:
.data
.balign 8
-.globl sha256_digest
-sha256_digest:
+.globl purgatory_sha256_digest
+purgatory_sha256_digest:
.skip 32
- .size sha256_digest, . - sha256_digest
+ .size purgatory_sha256_digest, . - purgatory_sha256_digest
.balign 8
-.globl sha_regions
-sha_regions:
+.globl purgatory_sha_regions
+purgatory_sha_regions:
.skip 8 * 2 * 16
- .size sha_regions, . - sha_regions
+ .size purgatory_sha_regions, . - purgatory_sha_regions
diff --git a/arch/powerpc/sysdev/axonram.c b/arch/powerpc/sysdev/axonram.c
index ada29eaed6e2..f523ac883150 100644
--- a/arch/powerpc/sysdev/axonram.c
+++ b/arch/powerpc/sysdev/axonram.c
@@ -274,7 +274,9 @@ failed:
if (bank->disk->major > 0)
unregister_blkdev(bank->disk->major,
bank->disk->disk_name);
- del_gendisk(bank->disk);
+ if (bank->disk->flags & GENHD_FL_UP)
+ del_gendisk(bank->disk);
+ put_disk(bank->disk);
}
device->dev.platform_data = NULL;
if (bank->io_addr != 0)
@@ -299,6 +301,7 @@ axon_ram_remove(struct platform_device *device)
device_remove_file(&device->dev, &dev_attr_ecc);
free_irq(bank->irq_id, device);
del_gendisk(bank->disk);
+ put_disk(bank->disk);
iounmap((void __iomem *) bank->io_addr);
kfree(bank);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 21:23:57 +0000