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Subject[PATCH 4.14 134/173] KVM: Use vcpu-specific gva->hva translation when querying host page size
Date
From: Sean Christopherson <sean.j.christopherson@intel.com>

[ Upstream commit f9b84e19221efc5f493156ee0329df3142085f28 ]

Use kvm_vcpu_gfn_to_hva() when retrieving the host page size so that the
correct set of memslots is used when handling x86 page faults in SMM.

Fixes: 54bf36aac520 ("KVM: x86: use vcpu-specific functions to read/write/translate GFNs")
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/x86/kvm/mmu.c | 6 +++---
include/linux/kvm_host.h | 2 +-
virt/kvm/kvm_main.c | 4 ++--
3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index c0b0135ef07f0..e5af08b581320 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1165,12 +1165,12 @@ static bool mmu_gfn_lpage_is_disallowed(struct kvm_vcpu *vcpu, gfn_t gfn,
return __mmu_gfn_lpage_is_disallowed(gfn, level, slot);
}

-static int host_mapping_level(struct kvm *kvm, gfn_t gfn)
+static int host_mapping_level(struct kvm_vcpu *vcpu, gfn_t gfn)
{
unsigned long page_size;
int i, ret = 0;

- page_size = kvm_host_page_size(kvm, gfn);
+ page_size = kvm_host_page_size(vcpu, gfn);

for (i = PT_PAGE_TABLE_LEVEL; i <= PT_MAX_HUGEPAGE_LEVEL; ++i) {
if (page_size >= KVM_HPAGE_SIZE(i))
@@ -1220,7 +1220,7 @@ static int mapping_level(struct kvm_vcpu *vcpu, gfn_t large_gfn,
if (unlikely(*force_pt_level))
return PT_PAGE_TABLE_LEVEL;

- host_level = host_mapping_level(vcpu->kvm, large_gfn);
+ host_level = host_mapping_level(vcpu, large_gfn);

if (host_level == PT_PAGE_TABLE_LEVEL)
return host_level;
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 7668c68ddb5b3..30376715a6070 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -695,7 +695,7 @@ int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
bool kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
-unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
+unsigned long kvm_host_page_size(struct kvm_vcpu *vcpu, gfn_t gfn);
void mark_page_dirty(struct kvm *kvm, gfn_t gfn);

struct kvm_memslots *kvm_vcpu_memslots(struct kvm_vcpu *vcpu);
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index deff4b3eb9722..609903481e39b 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1277,14 +1277,14 @@ bool kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn)
}
EXPORT_SYMBOL_GPL(kvm_is_visible_gfn);

-unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn)
+unsigned long kvm_host_page_size(struct kvm_vcpu *vcpu, gfn_t gfn)
{
struct vm_area_struct *vma;
unsigned long addr, size;

size = PAGE_SIZE;

- addr = gfn_to_hva(kvm, gfn);
+ addr = kvm_vcpu_gfn_to_hva(vcpu, gfn);
if (kvm_is_error_hva(addr))
return PAGE_SIZE;

--
2.20.1


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