On 3/29/24 23:58, Michael Roth wrote:
From: Brijesh Singh <brijesh.singh@xxxxxxx>
When SEV-SNP is enabled globally, the hardware places restrictions on
all memory accesses based on the RMP entry, whether the hypervisor or a
VM, performs the accesses. When hardware encounters an RMP access
violation during a guest access, it will cause a #VMEXIT(NPF) with a
number of additional bits set to indicate the reasons for the #NPF.
Define those here.
See APM2 section 16.36.10 for more details.
Signed-off-by: Brijesh Singh <brijesh.singh@xxxxxxx>
Signed-off-by: Ashish Kalra <ashish.kalra@xxxxxxx>
[mdr: add some additional details to commit message]
Signed-off-by: Michael Roth <michael.roth@xxxxxxx>
Reviewed-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
One nit below.
---
arch/x86/include/asm/kvm_host.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 90dc0ae9311a..a3f8eba8d8b6 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -262,9 +262,12 @@ enum x86_intercept_stage;
#define PFERR_FETCH_BIT 4
#define PFERR_PK_BIT 5
#define PFERR_SGX_BIT 15
+#define PFERR_GUEST_RMP_BIT 31
#define PFERR_GUEST_FINAL_BIT 32
#define PFERR_GUEST_PAGE_BIT 33
#define PFERR_GUEST_ENC_BIT 34
+#define PFERR_GUEST_SIZEM_BIT 35
+#define PFERR_GUEST_VMPL_BIT 36
#define PFERR_IMPLICIT_ACCESS_BIT 48
#define PFERR_PRESENT_MASK BIT(PFERR_PRESENT_BIT)
@@ -277,7 +280,10 @@ enum x86_intercept_stage;
#define PFERR_GUEST_FINAL_MASK BIT_ULL(PFERR_GUEST_FINAL_BIT)
#define PFERR_GUEST_PAGE_MASK BIT_ULL(PFERR_GUEST_PAGE_BIT)
#define PFERR_GUEST_ENC_MASK BIT_ULL(PFERR_GUEST_ENC_BIT)
+#define PFERR_GUEST_RMP_MASK BIT_ULL(PFERR_GUEST_RMP_BIT)
+#define PFERR_GUEST_SIZEM_MASK BIT_ULL(PFERR_GUEST_SIZEM_BIT)
#define PFERR_IMPLICIT_ACCESS BIT_ULL(PFERR_IMPLICIT_ACCESS_BIT)
+#define PFERR_GUEST_VMPL_MASK BIT_ULL(PFERR_GUEST_VMPL_BIT)
Should be kept in either bit order or perhaps alphabetical order
(probably bit is better).
Paolo
#define PFERR_NESTED_GUEST_PAGE (PFERR_GUEST_PAGE_MASK | \
PFERR_WRITE_MASK | \
