linux-kernel - [PATCH 1/1 fyi] tools headers x86 svm: Sync svm headers with the kernel sources

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Message-ID: <aErcjuTTCVEZ-8Nb@x1>
Date: Thu, 12 Jun 2025 10:56:30 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Adrian Hunter <adrian.hunter@...el.com>,
	Ian Rogers <irogers@...gle.com>,
	James Clark <james.clark@...aro.org>, Jiri Olsa <jolsa@...nel.org>,
	Kan Liang <kan.liang@...ux.intel.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Nikunj A Dadhania <nikunj@....com>,
	Sean Christopherson <seanjc@...gle.com>
Subject: [PATCH 1/1 fyi] tools headers x86 svm: Sync svm headers with the
 kernel sources

tldr; Just FYI, I'm carrying this on the perf tools tree.

Full explanation:

There used to be no copies, with tools/ code using kernel headers
directly. From time to time tools/perf/ broke due to legitimate kernel
hacking. At some point Linus complained about such direct usage. Then we
adopted the current model.

See further details at:

 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/tools/include/uapi/README

To pick the changes in:

  827547bc3a2a2af6 ("KVM: SVM: Add architectural definitions/assets for Bus Lock Threshold")

That triggers:

  CC      /tmp/build/perf-tools/arch/x86/util/kvm-stat.o
  LD      /tmp/build/perf-tools/arch/x86/util/perf-util-in.o
  LD      /tmp/build/perf-tools/arch/x86/perf-util-in.o
  LD      /tmp/build/perf-tools/arch/perf-util-in.o
  LD      /tmp/build/perf-tools/perf-util-in.o
  AR      /tmp/build/perf-tools/libperf-util.a
  LINK    /tmp/build/perf-tools/perf

The SVM_EXIT_BUS_LOCK exit reason was added to SVM_EXIT_REASONS, used in
kvm-stat.c.

This addresses this perf build warning:

 Warning: Kernel ABI header differences:
  diff -u tools/arch/x86/include/uapi/asm/svm.h arch/x86/include/uapi/asm/svm.h

Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Ian Rogers <irogers@...gle.com>
Cc: James Clark <james.clark@...aro.org>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Kan Liang <kan.liang@...ux.intel.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Nikunj A Dadhania <nikunj@....com>
Cc: Sean Christopherson <seanjc@...gle.com>
Link: https://lore.kernel.org/r/
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/arch/x86/include/uapi/asm/svm.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/arch/x86/include/uapi/asm/svm.h b/tools/arch/x86/include/uapi/asm/svm.h
index ec1321248dac2ab5..9c640a521a67006d 100644
--- a/tools/arch/x86/include/uapi/asm/svm.h
+++ b/tools/arch/x86/include/uapi/asm/svm.h
@@ -95,6 +95,7 @@
 #define SVM_EXIT_CR14_WRITE_TRAP		0x09e
 #define SVM_EXIT_CR15_WRITE_TRAP		0x09f
 #define SVM_EXIT_INVPCID       0x0a2
+#define SVM_EXIT_BUS_LOCK			0x0a5
 #define SVM_EXIT_IDLE_HLT      0x0a6
 #define SVM_EXIT_NPF           0x400
 #define SVM_EXIT_AVIC_INCOMPLETE_IPI		0x401
@@ -225,6 +226,7 @@
 	{ SVM_EXIT_CR4_WRITE_TRAP,	"write_cr4_trap" }, \
 	{ SVM_EXIT_CR8_WRITE_TRAP,	"write_cr8_trap" }, \
 	{ SVM_EXIT_INVPCID,     "invpcid" }, \
+	{ SVM_EXIT_BUS_LOCK,     "buslock" }, \
 	{ SVM_EXIT_IDLE_HLT,     "idle-halt" }, \
 	{ SVM_EXIT_NPF,         "npf" }, \
 	{ SVM_EXIT_AVIC_INCOMPLETE_IPI,		"avic_incomplete_ipi" }, \
-- 
2.49.0