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

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Message-ID: <aQjIoIDY94n336Hw@x1>
Date: Mon, 3 Nov 2025 12:22:08 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Borislav Petkov <bp@...en8.de>,
	Neeraj Upadhyay <Neeraj.Upadhyay@....com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Ian Rogers <irogers@...gle.com>,
	James Clark <james.clark@...aro.org>, Jiri Olsa <jolsa@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>
Subject: [PATCH 1/1] tools headers 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:

  b8c3c9f5d0505905 ("x86/apic: Initialize Secure AVIC APIC backing page")

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

But this time causes no changes in tooling results, as the introduced
SVM_VMGEXIT_SAVIC exit reason wasn't added to SVM_EXIT_REASONS, that is
used in kvm-stat.c.

And 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

Please see tools/include/uapi/README for further details.

Cc: Borislav Petkov (AMD) <bp@...en8.de>
Cc: Neeraj Upadhyay <Neeraj.Upadhyay@....com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/arch/x86/include/uapi/asm/svm.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/arch/x86/include/uapi/asm/svm.h b/tools/arch/x86/include/uapi/asm/svm.h
index 9c640a521a67006d..650e3256ea7d7339 100644
--- a/tools/arch/x86/include/uapi/asm/svm.h
+++ b/tools/arch/x86/include/uapi/asm/svm.h
@@ -118,6 +118,10 @@
 #define SVM_VMGEXIT_AP_CREATE			1
 #define SVM_VMGEXIT_AP_DESTROY			2
 #define SVM_VMGEXIT_SNP_RUN_VMPL		0x80000018
+#define SVM_VMGEXIT_SAVIC			0x8000001a
+#define SVM_VMGEXIT_SAVIC_REGISTER_GPA		0
+#define SVM_VMGEXIT_SAVIC_UNREGISTER_GPA	1
+#define SVM_VMGEXIT_SAVIC_SELF_GPA		~0ULL
 #define SVM_VMGEXIT_HV_FEATURES			0x8000fffd
 #define SVM_VMGEXIT_TERM_REQUEST		0x8000fffe
 #define SVM_VMGEXIT_TERM_REASON(reason_set, reason_code)	\
-- 
2.51.1