github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-28 17:13:52 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

KVM: arm64: Use __kvm_faultin_pfn() to handle memory aborts

Browse Source 
Convert arm64 to use __kvm_faultin_pfn()+kvm_release_faultin_page().
Three down, six to go.

Tested-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20241010182427.1434605-57-seanjc@google.com>
This commit is contained in:
Sean Christopherson 2024-10-10 11:23:58 -07:00 committed by Paolo Bonzini
parent 28991c91d5
commit 85c7869e30
1 changed files with 6 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
arch/arm64/kvm/mmu.c
View File

@ -1440,6 +1440,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
long vma_pagesize, fault_granule;
enum kvm_pgtable_prot prot = KVM_PGTABLE_PROT_R;
struct kvm_pgtable *pgt;
struct page *page;
if (fault_is_perm)
fault_granule = kvm_vcpu_trap_get_perm_fault_granule(vcpu);
@ -1561,7 +1562,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
/*
* Read mmu_invalidate_seq so that KVM can detect if the results of
* vma_lookup() or __gfn_to_pfn_memslot() become stale prior to
* vma_lookup() or __kvm_faultin_pfn() become stale prior to
* acquiring kvm->mmu_lock.
*
* Rely on mmap_read_unlock() for an implicit smp_rmb(), which pairs
@ -1570,8 +1571,8 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
mmu_seq = vcpu->kvm->mmu_invalidate_seq;
mmap_read_unlock(current->mm);
pfn = __gfn_to_pfn_memslot(memslot, gfn, false, NULL,
write_fault, &writable);
pfn = __kvm_faultin_pfn(memslot, gfn, write_fault ? FOLL_WRITE : 0,
&writable, &page);
if (pfn == KVM_PFN_ERR_HWPOISON) {
kvm_send_hwpoison_signal(hva, vma_shift);
return 0;
@ -1584,7 +1585,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
* If the page was identified as device early by looking at
* the VMA flags, vma_pagesize is already representing the
* largest quantity we can map. If instead it was mapped
* via gfn_to_pfn_prot(), vma_pagesize is set to PAGE_SIZE
* via __kvm_faultin_pfn(), vma_pagesize is set to PAGE_SIZE
* and must not be upgraded.
*
* In both cases, we don't let transparent_hugepage_adjust()
@ -1693,11 +1694,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
}
out_unlock:
if (writable && !ret)
kvm_release_pfn_dirty(pfn);
else
kvm_release_pfn_clean(pfn);
kvm_release_faultin_page(kvm, page, !!ret, writable);
read_unlock(&kvm->mmu_lock);
/* Mark the page dirty only if the fault is handled successfully */