From: Sean Christopherson <sean.j.christopherson@intel.com>
Date: Wed, 8 Jan 2020 12:24:37 -0800
Subject: KVM: Use vcpu-specific gva->hva translation when querying host page
 size
Git-commit: f9b84e19221efc5f493156ee0329df3142085f28
Patch-mainline: v5.6-rc1
References: bsc#1164337

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>
Acked-by: Joerg Roedel <jroedel@suse.de>
---
 arch/powerpc/kvm/book3s_xive_native.c | 2 +-
 arch/x86/kvm/mmu/mmu.c                | 6 +++---
 include/linux/kvm_host.h              | 2 +-
 virt/kvm/kvm_main.c                   | 4 ++--
 4 files changed, 7 insertions(+), 7 deletions(-)

--- a/arch/powerpc/kvm/book3s_xive_native.c
+++ b/arch/powerpc/kvm/book3s_xive_native.c
@@ -638,7 +638,7 @@ static int kvmppc_xive_native_set_queue_
 	srcu_idx = srcu_read_lock(&kvm->srcu);
 	gfn = gpa_to_gfn(kvm_eq.qaddr);
 
-	page_size = kvm_host_page_size(kvm, gfn);
+	page_size = kvm_host_page_size(vcpu, gfn);
 	if (1ull << kvm_eq.qshift > page_size) {
 		srcu_read_unlock(&kvm->srcu, srcu_idx);
 		pr_warn("Incompatible host page size %lx!\n", page_size);
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1251,12 +1251,12 @@ static bool mmu_gfn_lpage_is_disallowed(
 	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))
@@ -1306,7 +1306,7 @@ static int mapping_level(struct kvm_vcpu
 	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;
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -750,7 +750,7 @@ int kvm_clear_guest_page(struct kvm *kvm
 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);
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1377,14 +1377,14 @@ bool kvm_is_visible_gfn(struct kvm *kvm,
 }
 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;