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

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Message-ID: <20250919223258.1604852-23-seanjc@google.com>
Date: Fri, 19 Sep 2025 15:32:29 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Paolo Bonzini <pbonzini@...hat.com>, Sean Christopherson <seanjc@...gle.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Tom Lendacky <thomas.lendacky@....com>, Mathias Krause <minipli@...ecurity.net>, 
	John Allen <john.allen@....com>, Rick Edgecombe <rick.p.edgecombe@...el.com>, 
	Chao Gao <chao.gao@...el.com>, Binbin Wu <binbin.wu@...ux.intel.com>, 
	Xiaoyao Li <xiaoyao.li@...el.com>, Maxim Levitsky <mlevitsk@...hat.com>, 
	Zhang Yi Z <yi.z.zhang@...ux.intel.com>, Xin Li <xin@...or.com>
Subject: [PATCH v16 22/51] KVM: x86/mmu: Pretty print PK, SS, and SGX flags in
 MMU tracepoints

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 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@...gle.com>
---
 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" }
 
-- 
2.51.0.470.ga7dc726c21-goog