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Date: Fri, 01 Jul 2022 17:24:13 +0800
From: "Hou Wenlong" <houwenlong.hwl@...group.com>
To: kvm@...r.kernel.org
Cc: Paolo Bonzini <pbonzini@...hat.com>,
Sean Christopherson <seanjc@...gle.com>,
Vitaly Kuznetsov <vkuznets@...hat.com>,
Wanpeng Li <wanpengli@...cent.com>,
Jim Mattson <jmattson@...gle.com>,
Joerg Roedel <joro@...tes.org>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
"H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org
Subject: [PATCH] KVM: x86/mmu: Replace UNMAPPED_GVA with INVALID_GPA for gva_to_gpa()
The result of gva_to_gpa() is physical address not virtual address,
it is odd that UNMAPPED_GVA macro is used as the result for physical
address. Replace UNMAPPED_GVA with INVALID_GPA and drop UNMAPPED_GVA
macro.
No functional change intended.
Signed-off-by: Hou Wenlong <houwenlong.hwl@...group.com>
---
arch/x86/include/asm/kvm_host.h | 1 -
arch/x86/kvm/mmu/paging_tmpl.h | 6 +++---
arch/x86/kvm/vmx/sgx.c | 2 +-
arch/x86/kvm/x86.c | 18 +++++++++---------
4 files changed, 13 insertions(+), 14 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 665667d61caf..b438d86796ac 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -129,7 +129,6 @@
#define INVALID_PAGE (~(hpa_t)0)
#define VALID_PAGE(x) ((x) != INVALID_PAGE)
-#define UNMAPPED_GVA (~(gpa_t)0)
#define INVALID_GPA (~(gpa_t)0)
/* KVM Hugepage definitions for x86 */
diff --git a/arch/x86/kvm/mmu/paging_tmpl.h b/arch/x86/kvm/mmu/paging_tmpl.h
index fc6d8dcff019..25ad6c32700a 100644
--- a/arch/x86/kvm/mmu/paging_tmpl.h
+++ b/arch/x86/kvm/mmu/paging_tmpl.h
@@ -378,7 +378,7 @@ static int FNAME(walk_addr_generic)(struct guest_walker *walker,
* information to fix the exit_qualification or exit_info_1
* fields.
*/
- if (unlikely(real_gpa == UNMAPPED_GVA))
+ if (unlikely(real_gpa == INVALID_GPA))
return 0;
host_addr = kvm_vcpu_gfn_to_hva_prot(vcpu, gpa_to_gfn(real_gpa),
@@ -431,7 +431,7 @@ static int FNAME(walk_addr_generic)(struct guest_walker *walker,
#endif
real_gpa = kvm_translate_gpa(vcpu, mmu, gfn_to_gpa(gfn), access, &walker->fault);
- if (real_gpa == UNMAPPED_GVA)
+ if (real_gpa == INVALID_GPA)
return 0;
walker->gfn = real_gpa >> PAGE_SHIFT;
@@ -962,7 +962,7 @@ static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
struct x86_exception *exception)
{
struct guest_walker walker;
- gpa_t gpa = UNMAPPED_GVA;
+ gpa_t gpa = INVALID_GPA;
int r;
#ifndef CONFIG_X86_64
diff --git a/arch/x86/kvm/vmx/sgx.c b/arch/x86/kvm/vmx/sgx.c
index 35e7ec91ae86..7ae8aa73724c 100644
--- a/arch/x86/kvm/vmx/sgx.c
+++ b/arch/x86/kvm/vmx/sgx.c
@@ -79,7 +79,7 @@ static int sgx_gva_to_gpa(struct kvm_vcpu *vcpu, gva_t gva, bool write,
else
*gpa = kvm_mmu_gva_to_gpa_read(vcpu, gva, &ex);
- if (*gpa == UNMAPPED_GVA) {
+ if (*gpa == INVALID_GPA) {
kvm_inject_emulated_page_fault(vcpu, &ex);
return -EFAULT;
}
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 7ce0c6fe166d..fe6ae7f518d2 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -849,7 +849,7 @@ int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
*/
real_gpa = kvm_translate_gpa(vcpu, mmu, gfn_to_gpa(pdpt_gfn),
PFERR_USER_MASK | PFERR_WRITE_MASK, NULL);
- if (real_gpa == UNMAPPED_GVA)
+ if (real_gpa == INVALID_GPA)
return 0;
/* Note the offset, PDPTRs are 32 byte aligned when using PAE paging. */
@@ -6981,7 +6981,7 @@ static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes,
unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset);
int ret;
- if (gpa == UNMAPPED_GVA)
+ if (gpa == INVALID_GPA)
return X86EMUL_PROPAGATE_FAULT;
ret = kvm_vcpu_read_guest_page(vcpu, gpa >> PAGE_SHIFT, data,
offset, toread);
@@ -7012,7 +7012,7 @@ static int kvm_fetch_guest_virt(struct x86_emulate_ctxt *ctxt,
/* Inline kvm_read_guest_virt_helper for speed. */
gpa_t gpa = mmu->gva_to_gpa(vcpu, mmu, addr, access|PFERR_FETCH_MASK,
exception);
- if (unlikely(gpa == UNMAPPED_GVA))
+ if (unlikely(gpa == INVALID_GPA))
return X86EMUL_PROPAGATE_FAULT;
offset = addr & (PAGE_SIZE-1);
@@ -7082,7 +7082,7 @@ static int kvm_write_guest_virt_helper(gva_t addr, void *val, unsigned int bytes
unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset);
int ret;
- if (gpa == UNMAPPED_GVA)
+ if (gpa == INVALID_GPA)
return X86EMUL_PROPAGATE_FAULT;
ret = kvm_vcpu_write_guest(vcpu, gpa, data, towrite);
if (ret < 0) {
@@ -7193,7 +7193,7 @@ static int vcpu_mmio_gva_to_gpa(struct kvm_vcpu *vcpu, unsigned long gva,
*gpa = mmu->gva_to_gpa(vcpu, mmu, gva, access, exception);
- if (*gpa == UNMAPPED_GVA)
+ if (*gpa == INVALID_GPA)
return -1;
return vcpu_is_mmio_gpa(vcpu, gva, *gpa, write);
@@ -7430,7 +7430,7 @@ static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt,
gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL);
- if (gpa == UNMAPPED_GVA ||
+ if (gpa == INVALID_GPA ||
(gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
goto emul_write;
@@ -8253,7 +8253,7 @@ static bool reexecute_instruction(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
* If the mapping is invalid in guest, let cpu retry
* it to generate fault.
*/
- if (gpa == UNMAPPED_GVA)
+ if (gpa == INVALID_GPA)
return true;
}
@@ -11292,7 +11292,7 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL);
srcu_read_unlock(&vcpu->kvm->srcu, idx);
tr->physical_address = gpa;
- tr->valid = gpa != UNMAPPED_GVA;
+ tr->valid = gpa != INVALID_GPA;
tr->writeable = 1;
tr->usermode = 0;
@@ -12893,7 +12893,7 @@ void kvm_fixup_and_inject_pf_error(struct kvm_vcpu *vcpu, gva_t gva, u16 error_c
(PFERR_WRITE_MASK | PFERR_FETCH_MASK | PFERR_USER_MASK);
if (!(error_code & PFERR_PRESENT_MASK) ||
- mmu->gva_to_gpa(vcpu, mmu, gva, access, &fault) != UNMAPPED_GVA) {
+ mmu->gva_to_gpa(vcpu, mmu, gva, access, &fault) != INVALID_GPA) {
/*
* If vcpu->arch.walk_mmu->gva_to_gpa succeeded, the page
* tables probably do not match the TLB. Just proceed
--
2.31.1
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