From: Sean Christopherson <seanjc@xxxxxxxxxx>
Derive the mask of RWX bits reported on EPT violations from the mask of
RWX bits that are shoved into EPT entries; the layout is the same, the
EPT violation bits are simply shifted by three. Use the new shift and a
slight copy-paste of the mask derivation instead of completely open
coding the same to convert between the EPT entry bits and the exit
qualification when synthesizing a nested EPT Violation.
No functional change intended.
Cc: SU Hang <darcy.sh@xxxxxxxxxxxx>
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
arch/x86/include/asm/vmx.h | 7 +------
arch/x86/kvm/mmu/paging_tmpl.h | 8 +++++++-
arch/x86/kvm/vmx/vmx.c | 4 +---
3 files changed, 9 insertions(+), 10 deletions(-)
diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h
index 3586d4aeaac7..46bc7072f6a2 100644
--- a/arch/x86/include/asm/vmx.h
+++ b/arch/x86/include/asm/vmx.h
@@ -543,17 +543,12 @@ enum vm_entry_failure_code {
#define EPT_VIOLATION_ACC_READ_BIT 0
#define EPT_VIOLATION_ACC_WRITE_BIT 1
#define EPT_VIOLATION_ACC_INSTR_BIT 2
-#define EPT_VIOLATION_READABLE_BIT 3
-#define EPT_VIOLATION_WRITABLE_BIT 4
-#define EPT_VIOLATION_EXECUTABLE_BIT 5
#define EPT_VIOLATION_GVA_IS_VALID_BIT 7
#define EPT_VIOLATION_GVA_TRANSLATED_BIT 8
#define EPT_VIOLATION_ACC_READ (1 << EPT_VIOLATION_ACC_READ_BIT)
#define EPT_VIOLATION_ACC_WRITE (1 << EPT_VIOLATION_ACC_WRITE_BIT)
#define EPT_VIOLATION_ACC_INSTR (1 << EPT_VIOLATION_ACC_INSTR_BIT)
-#define EPT_VIOLATION_READABLE (1 << EPT_VIOLATION_READABLE_BIT)
-#define EPT_VIOLATION_WRITABLE (1 << EPT_VIOLATION_WRITABLE_BIT)
-#define EPT_VIOLATION_EXECUTABLE (1 << EPT_VIOLATION_EXECUTABLE_BIT)
+#define EPT_VIOLATION_RWX_MASK (VMX_EPT_RWX_MASK << EPT_VIOLATION_RWX_SHIFT)
#define EPT_VIOLATION_GVA_IS_VALID (1 << EPT_VIOLATION_GVA_IS_VALID_BIT)
#define EPT_VIOLATION_GVA_TRANSLATED (1 << EPT_VIOLATION_GVA_TRANSLATED_BIT)
diff --git a/arch/x86/kvm/mmu/paging_tmpl.h b/arch/x86/kvm/mmu/paging_tmpl.h
index db594366f60c..a4a9d7f2d3bd 100644
--- a/arch/x86/kvm/mmu/paging_tmpl.h
+++ b/arch/x86/kvm/mmu/paging_tmpl.h
@@ -531,7 +531,13 @@ static int FNAME(walk_addr_generic)(struct guest_walker *walker,
vcpu->arch.exit_qualification |= EPT_VIOLATION_ACC_READ;
if (fetch_fault)
vcpu->arch.exit_qualification |= EPT_VIOLATION_ACC_INSTR;
- vcpu->arch.exit_qualification |= (pte_access & 0x7) << 3;
+
+ /*
+ * Note, pte_access holds the raw RWX bits from the EPTE, not
+ * ACC_*_MASK flags!
+ */
+ vcpu->arch.exit_qualification |= (pte_access & VMX_EPT_RWX_MASK) <<
+ EPT_VIOLATION_RWX_SHIFT;
}
#endif
walker->fault.address = addr;
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 5b629acafa69..9c1f6d3dceef 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -5410,9 +5410,7 @@ static int handle_ept_violation(struct kvm_vcpu *vcpu)
error_code |= (exit_qualification & EPT_VIOLATION_ACC_INSTR)
? PFERR_FETCH_MASK : 0;
/* ept page table entry is present? */
- error_code |= (exit_qualification &
- (EPT_VIOLATION_READABLE | EPT_VIOLATION_WRITABLE |
- EPT_VIOLATION_EXECUTABLE))
+ error_code |= (exit_qualification & EPT_VIOLATION_RWX_MASK)
? PFERR_PRESENT_MASK : 0;
error_code |= (exit_qualification & EPT_VIOLATION_GVA_TRANSLATED) != 0 ?
--
2.32.0.3.g01195cf9f
