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| author | Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2019-03-05 15:46:26 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-05 21:07:18 -0800 |
| commit | 0cbe3e26abe0cfe7effb67f620a77d46cce628b2 (patch) | |
| tree | 66c7245bed4833b455a9763daf5f1286646bd94e /arch/x86/xen/mmu_pv.c | |
| parent | 8bb4e7a2ee26c05a94ae6cb0aec2f82a3523cf35 (diff) | |
| download | linux-0cbe3e26abe0cfe7effb67f620a77d46cce628b2.tar.bz2 | |
mm: update ptep_modify_prot_start/commit to take vm_area_struct as arg
Patch series "NestMMU pte upgrade workaround for mprotect", v5.
We can upgrade pte access (R -> RW transition) via mprotect. We need to
make sure we follow the recommended pte update sequence as outlined in
commit bd5050e38aec ("powerpc/mm/radix: Change pte relax sequence to
handle nest MMU hang") for such updates. This patch series does that.
This patch (of 5):
Some architectures may want to call flush_tlb_range from these helpers.
Link: http://lkml.kernel.org/r/20190116085035.29729-2-aneesh.kumar@linux.ibm.com
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86/xen/mmu_pv.c')
| -rw-r--r-- | arch/x86/xen/mmu_pv.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c index 0f4fe206dcc2..856a85814f00 100644 --- a/arch/x86/xen/mmu_pv.c +++ b/arch/x86/xen/mmu_pv.c @@ -306,20 +306,20 @@ static void xen_set_pte_at(struct mm_struct *mm, unsigned long addr, __xen_set_pte(ptep, pteval); } -pte_t xen_ptep_modify_prot_start(struct mm_struct *mm, +pte_t xen_ptep_modify_prot_start(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) { /* Just return the pte as-is. We preserve the bits on commit */ - trace_xen_mmu_ptep_modify_prot_start(mm, addr, ptep, *ptep); + trace_xen_mmu_ptep_modify_prot_start(vma->vm_mm, addr, ptep, *ptep); return *ptep; } -void xen_ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr, +void xen_ptep_modify_prot_commit(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep, pte_t pte) { struct mmu_update u; - trace_xen_mmu_ptep_modify_prot_commit(mm, addr, ptep, pte); + trace_xen_mmu_ptep_modify_prot_commit(vma->vm_mm, addr, ptep, pte); xen_mc_batch(); u.ptr = virt_to_machine(ptep).maddr | MMU_PT_UPDATE_PRESERVE_AD; |