When SEV-SNP is enabled globally, the hardware places restrictions on all
memory accesses based on the RMP entry, whether the hyperviso or a VM,
performs the accesses. When hardware encounters an RMP access violation
during a guest access, it will cause a #VMEXIT(NPF).
See APM2 section 16.36.10 for more details.
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: Borislav Petkov <b...@alien8.de>
Cc: Joerg Roedel <jroe...@suse.de>
Cc: "H. Peter Anvin" <h...@zytor.com>
Cc: Tony Luck <tony.l...@intel.com>
Cc: Dave Hansen <dave.han...@intel.com>
Cc: "Peter Zijlstra (Intel)" <pet...@infradead.org>
Cc: Paolo Bonzini <pbonz...@redhat.com>
Cc: Tom Lendacky <thomas.lenda...@amd.com>
Cc: David Rientjes <rient...@google.com>
Cc: Sean Christopherson <sea...@google.com>
Cc: Vitaly Kuznetsov <vkuzn...@redhat.com>
Cc: Wanpeng Li <wanpen...@tencent.com>
Cc: Jim Mattson <jmatt...@google.com>
Cc: x...@kernel.org
Cc: k...@vger.kernel.org
Signed-off-by: Brijesh Singh <brijesh.si...@amd.com>
---
arch/x86/include/asm/kvm_host.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 93dc4f232964..074605408970 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -216,8 +216,12 @@ enum x86_intercept_stage;
#define PFERR_RSVD_BIT 3
#define PFERR_FETCH_BIT 4
#define PFERR_PK_BIT 5
+#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_PRESENT_MASK (1U << PFERR_PRESENT_BIT)
#define PFERR_WRITE_MASK (1U << PFERR_WRITE_BIT)
@@ -227,6 +231,10 @@ enum x86_intercept_stage;
#define PFERR_PK_MASK (1U << PFERR_PK_BIT)
#define PFERR_GUEST_FINAL_MASK (1ULL << PFERR_GUEST_FINAL_BIT)
#define PFERR_GUEST_PAGE_MASK (1ULL << PFERR_GUEST_PAGE_BIT)
+#define PFERR_GUEST_RMP_MASK (1ULL << PFERR_GUEST_RMP_BIT)
+#define PFERR_GUEST_ENC_MASK (1ULL << PFERR_GUEST_ENC_BIT)
+#define PFERR_GUEST_SIZEM_MASK (1ULL << PFERR_GUEST_SIZEM_BIT)
+#define PFERR_GUEST_VMPL_MASK (1ULL << PFERR_GUEST_VMPL_BIT)
#define PFERR_NESTED_GUEST_PAGE (PFERR_GUEST_PAGE_MASK | \
PFERR_WRITE_MASK | \
--
2.17.1
