From: Colton Lewis <coltonlewis@google.com>
To: kvm@vger.kernel.org
Cc: Oliver Upton <oliver.upton@linux.dev>,
Sean Christopherson <seanjc@google.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@kernel.org>, Ian Rogers <irogers@google.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Kan Liang <kan.liang@linux.intel.com>,
Will Deacon <will@kernel.org>,
Russell King <linux@armlinux.org.uk>,
Catalin Marinas <catalin.marinas@arm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Naveen N Rao <naveen@kernel.org>,
Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Sven Schnelle <svens@linux.ibm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H . Peter Anvin" <hpa@zytor.com>,
linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org,
Colton Lewis <coltonlewis@google.com>
Subject: [PATCH v2 2/5] perf: Hoist perf_instruction_pointer() and perf_misc_flags()
Date: Wed, 11 Sep 2024 22:24:29 +0000 [thread overview]
Message-ID: <20240911222433.3415301-3-coltonlewis@google.com> (raw)
In-Reply-To: <20240911222433.3415301-1-coltonlewis@google.com>
For clarity, rename the arch-specific definitions of these functions
to perf_arch_* to denote they are arch-specifc. Define the
generic-named functions in one place where they can call the
arch-specific ones as needed.
Signed-off-by: Colton Lewis <coltonlewis@google.com>
---
arch/arm64/include/asm/perf_event.h | 6 +++---
arch/arm64/kernel/perf_callchain.c | 4 ++--
arch/powerpc/include/asm/perf_event_server.h | 6 +++---
arch/powerpc/perf/core-book3s.c | 4 ++--
arch/s390/include/asm/perf_event.h | 6 +++---
arch/s390/kernel/perf_event.c | 4 ++--
arch/x86/events/core.c | 4 ++--
arch/x86/include/asm/perf_event.h | 10 +++++-----
include/linux/perf_event.h | 9 ++++++---
kernel/events/core.c | 10 ++++++++++
10 files changed, 38 insertions(+), 25 deletions(-)
diff --git a/arch/arm64/include/asm/perf_event.h b/arch/arm64/include/asm/perf_event.h
index eb7071c9eb34..31a5584ed423 100644
--- a/arch/arm64/include/asm/perf_event.h
+++ b/arch/arm64/include/asm/perf_event.h
@@ -11,9 +11,9 @@
#ifdef CONFIG_PERF_EVENTS
struct pt_regs;
-extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
-extern unsigned long perf_misc_flags(struct pt_regs *regs);
-#define perf_misc_flags(regs) perf_misc_flags(regs)
+extern unsigned long perf_arch_instruction_pointer(struct pt_regs *regs);
+extern unsigned long perf_arch_misc_flags(struct pt_regs *regs);
+#define perf_arch_misc_flags(regs) perf_misc_flags(regs)
#define perf_arch_bpf_user_pt_regs(regs) ®s->user_regs
#endif
diff --git a/arch/arm64/kernel/perf_callchain.c b/arch/arm64/kernel/perf_callchain.c
index e8ed5673f481..01a9d08fc009 100644
--- a/arch/arm64/kernel/perf_callchain.c
+++ b/arch/arm64/kernel/perf_callchain.c
@@ -39,7 +39,7 @@ void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry,
arch_stack_walk(callchain_trace, entry, current, regs);
}
-unsigned long perf_instruction_pointer(struct pt_regs *regs)
+unsigned long perf_arch_instruction_pointer(struct pt_regs *regs)
{
if (perf_guest_state())
return perf_guest_get_ip();
@@ -47,7 +47,7 @@ unsigned long perf_instruction_pointer(struct pt_regs *regs)
return instruction_pointer(regs);
}
-unsigned long perf_misc_flags(struct pt_regs *regs)
+unsigned long perf_arch_misc_flags(struct pt_regs *regs)
{
unsigned int guest_state = perf_guest_state();
int misc = 0;
diff --git a/arch/powerpc/include/asm/perf_event_server.h b/arch/powerpc/include/asm/perf_event_server.h
index 5995614e9062..41587d3f8446 100644
--- a/arch/powerpc/include/asm/perf_event_server.h
+++ b/arch/powerpc/include/asm/perf_event_server.h
@@ -102,8 +102,8 @@ struct power_pmu {
int __init register_power_pmu(struct power_pmu *pmu);
struct pt_regs;
-extern unsigned long perf_misc_flags(struct pt_regs *regs);
-extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
+extern unsigned long perf_arch_misc_flags(struct pt_regs *regs);
+extern unsigned long perf_arch_instruction_pointer(struct pt_regs *regs);
extern unsigned long int read_bhrb(int n);
/*
@@ -111,7 +111,7 @@ extern unsigned long int read_bhrb(int n);
* if we have hardware PMU support.
*/
#ifdef CONFIG_PPC_PERF_CTRS
-#define perf_misc_flags(regs) perf_misc_flags(regs)
+#define perf_arch_misc_flags(regs) perf_misc_flags(regs)
#endif
/*
diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c
index 42867469752d..dc01aa604cc1 100644
--- a/arch/powerpc/perf/core-book3s.c
+++ b/arch/powerpc/perf/core-book3s.c
@@ -2332,7 +2332,7 @@ static void record_and_restart(struct perf_event *event, unsigned long val,
* Called from generic code to get the misc flags (i.e. processor mode)
* for an event_id.
*/
-unsigned long perf_misc_flags(struct pt_regs *regs)
+unsigned long perf_arch_misc_flags(struct pt_regs *regs)
{
u32 flags = perf_get_misc_flags(regs);
@@ -2346,7 +2346,7 @@ unsigned long perf_misc_flags(struct pt_regs *regs)
* Called from generic code to get the instruction pointer
* for an event_id.
*/
-unsigned long perf_instruction_pointer(struct pt_regs *regs)
+unsigned long perf_arch_instruction_pointer(struct pt_regs *regs)
{
unsigned long siar = mfspr(SPRN_SIAR);
diff --git a/arch/s390/include/asm/perf_event.h b/arch/s390/include/asm/perf_event.h
index 9917e2717b2b..f2d83289ec7a 100644
--- a/arch/s390/include/asm/perf_event.h
+++ b/arch/s390/include/asm/perf_event.h
@@ -37,9 +37,9 @@ extern ssize_t cpumf_events_sysfs_show(struct device *dev,
/* Perf callbacks */
struct pt_regs;
-extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
-extern unsigned long perf_misc_flags(struct pt_regs *regs);
-#define perf_misc_flags(regs) perf_misc_flags(regs)
+extern unsigned long perf_arch_instruction_pointer(struct pt_regs *regs);
+extern unsigned long perf_arch_misc_flags(struct pt_regs *regs);
+#define perf_arch_misc_flags(regs) perf_misc_flags(regs)
#define perf_arch_bpf_user_pt_regs(regs) ®s->user_regs
/* Perf pt_regs extension for sample-data-entry indicators */
diff --git a/arch/s390/kernel/perf_event.c b/arch/s390/kernel/perf_event.c
index 5fff629b1a89..f9000ab49f4a 100644
--- a/arch/s390/kernel/perf_event.c
+++ b/arch/s390/kernel/perf_event.c
@@ -57,7 +57,7 @@ static unsigned long instruction_pointer_guest(struct pt_regs *regs)
return sie_block(regs)->gpsw.addr;
}
-unsigned long perf_instruction_pointer(struct pt_regs *regs)
+unsigned long perf_arch_instruction_pointer(struct pt_regs *regs)
{
return is_in_guest(regs) ? instruction_pointer_guest(regs)
: instruction_pointer(regs);
@@ -84,7 +84,7 @@ static unsigned long perf_misc_flags_sf(struct pt_regs *regs)
return flags;
}
-unsigned long perf_misc_flags(struct pt_regs *regs)
+unsigned long perf_arch_misc_flags(struct pt_regs *regs)
{
/* Check if the cpum_sf PMU has created the pt_regs structure.
* In this case, perf misc flags can be easily extracted. Otherwise,
diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index be01823b1bb4..760ad067527c 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -2940,7 +2940,7 @@ static unsigned long code_segment_base(struct pt_regs *regs)
return 0;
}
-unsigned long perf_instruction_pointer(struct pt_regs *regs)
+unsigned long perf_arch_instruction_pointer(struct pt_regs *regs)
{
if (perf_guest_state())
return perf_guest_get_ip();
@@ -2948,7 +2948,7 @@ unsigned long perf_instruction_pointer(struct pt_regs *regs)
return regs->ip + code_segment_base(regs);
}
-unsigned long perf_misc_flags(struct pt_regs *regs)
+unsigned long perf_arch_misc_flags(struct pt_regs *regs)
{
unsigned int guest_state = perf_guest_state();
int misc = 0;
diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
index 91b73571412f..feb87bf3d2e9 100644
--- a/arch/x86/include/asm/perf_event.h
+++ b/arch/x86/include/asm/perf_event.h
@@ -536,15 +536,15 @@ struct x86_perf_regs {
u64 *xmm_regs;
};
-extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
-extern unsigned long perf_misc_flags(struct pt_regs *regs);
-#define perf_misc_flags(regs) perf_misc_flags(regs)
+extern unsigned long perf_arch_instruction_pointer(struct pt_regs *regs);
+extern unsigned long perf_arch_misc_flags(struct pt_regs *regs);
+#define perf_arch_misc_flags(regs) perf_arch_misc_flags(regs)
#include <asm/stacktrace.h>
/*
- * We abuse bit 3 from flags to pass exact information, see perf_misc_flags
- * and the comment with PERF_EFLAGS_EXACT.
+ * We abuse bit 3 from flags to pass exact information, see
+ * perf_arch_misc_flags() and the comment with PERF_EFLAGS_EXACT.
*/
#define perf_arch_fetch_caller_regs(regs, __ip) { \
(regs)->ip = (__ip); \
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 1a8942277dda..d061e327ad54 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -1633,10 +1633,13 @@ extern void perf_tp_event(u16 event_type, u64 count, void *record,
struct task_struct *task);
extern void perf_bp_event(struct perf_event *event, void *data);
-#ifndef perf_misc_flags
-# define perf_misc_flags(regs) \
+extern unsigned long perf_misc_flags(struct pt_regs *regs);
+extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
+
+#ifndef perf_arch_misc_flags
+# define perf_arch_misc_flags(regs) \
(user_mode(regs) ? PERF_RECORD_MISC_USER : PERF_RECORD_MISC_KERNEL)
-# define perf_instruction_pointer(regs) instruction_pointer(regs)
+# define perf_arch_instruction_pointer(regs) instruction_pointer(regs)
#endif
#ifndef perf_arch_bpf_user_pt_regs
# define perf_arch_bpf_user_pt_regs(regs) regs
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 8a6c6bbcd658..eeabbf791a8c 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -6921,6 +6921,16 @@ void perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *cbs)
EXPORT_SYMBOL_GPL(perf_unregister_guest_info_callbacks);
#endif
+unsigned long perf_misc_flags(struct pt_regs *regs)
+{
+ return perf_arch_misc_flags(regs);
+}
+
+unsigned long perf_instruction_pointer(struct pt_regs *regs)
+{
+ return perf_arch_instruction_pointer(regs);
+}
+
static void
perf_output_sample_regs(struct perf_output_handle *handle,
struct pt_regs *regs, u64 mask)
--
2.46.0.598.g6f2099f65c-goog
next prev parent reply other threads:[~2024-09-11 22:25 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-11 22:24 [PATCH v2 0/5] Correct perf sampling with Guest VMs Colton Lewis
2024-09-11 22:24 ` [PATCH v2 1/5] arm: perf: Drop unused functions Colton Lewis
2024-09-11 22:24 ` Colton Lewis [this message]
2024-09-11 22:24 ` [PATCH v2 3/5] powerpc: perf: Use perf_arch_instruction_pointer() Colton Lewis
2024-09-11 22:24 ` [PATCH v2 4/5] x86: perf: Refactor misc flag assignments Colton Lewis
2024-09-11 22:24 ` [PATCH v2 5/5] perf: Correct perf sampling with guest VMs Colton Lewis
2024-09-11 22:56 ` Sean Christopherson
2024-09-12 20:31 ` Colton Lewis
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