Re: [PATCH v16 22/51] KVM: x86/mmu: Pretty print PK, SS, and SGX flags in MMU tracepoints

From: Binbin Wu

Date: Mon Sep 22 2025 - 03:18:36 EST



On 9/20/2025 6:32 AM, Sean Christopherson wrote:
Add PK (Protection Keys), SS (Shadow Stacks), and SGX (Software Guard
Extensions) to the set of #PF error flags handled via
kvm_mmu_trace_pferr_flags. While KVM doesn't expect PK or SS #PFs
Also SGX.

in
particular, pretty print their names instead of the raw hex value saves
the user from having to go spelunking in the SDM to figure out what's
going on.

Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>

Reviewed-by: Binbin Wu <binbin.wu@xxxxxxxxxxxxxxx>

---
arch/x86/kvm/mmu/mmutrace.h | 3 +++
1 file changed, 3 insertions(+)

diff --git a/arch/x86/kvm/mmu/mmutrace.h b/arch/x86/kvm/mmu/mmutrace.h
index f35a830ce469..764e3015d021 100644
--- a/arch/x86/kvm/mmu/mmutrace.h
+++ b/arch/x86/kvm/mmu/mmutrace.h
@@ -51,6 +51,9 @@
{ PFERR_PRESENT_MASK, "P" }, \
{ PFERR_WRITE_MASK, "W" }, \
{ PFERR_USER_MASK, "U" }, \
+ { PFERR_PK_MASK, "PK" }, \
+ { PFERR_SS_MASK, "SS" }, \
+ { PFERR_SGX_MASK, "SGX" }, \
{ PFERR_RSVD_MASK, "RSVD" }, \
{ PFERR_FETCH_MASK, "F" }