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Message-Id: <1337801535-12865-2-git-send-email-jolsa@redhat.com>
Date: Wed, 23 May 2012 21:32:00 +0200
From: Jiri Olsa <jolsa@...hat.com>
To: acme@...hat.com, a.p.zijlstra@...llo.nl, mingo@...e.hu,
paulus@...ba.org, cjashfor@...ux.vnet.ibm.com, fweisbec@...il.com
Cc: eranian@...gle.com, gorcunov@...nvz.org, tzanussi@...il.com,
mhiramat@...hat.com, robert.richter@....com, fche@...hat.com,
linux-kernel@...r.kernel.org, masami.hiramatsu.pt@...achi.com,
drepper@...il.com, asharma@...com, benjamin.redelings@...cent.org,
Jiri Olsa <jolsa@...hat.com>
Subject: [PATCH 01/16] perf: Unified API to record selective sets of arch registers
This brings a new API to help the selective dump of registers on
event sampling, and its implementation in x86.
Added HAVE_PERF_REGS config option to determine if the architecture
provides perf registers ABI.
The architecture must provide a non-zero and unique id to
identify the origin of a register set because interpreting a
register dump requires to know from which architecture it comes.
The achitecture is considered different between the 32 and 64 bits.
x86-32 has the id 1, x86-64 has the id 2.
The information about desired registers will be passed
in u64 mask. It's up to the architecture to map the
registers into the mask bits.
Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
Signed-off-by: Jiri Olsa <jolsa@...hat.com>
---
arch/Kconfig | 6 ++
arch/x86/Kconfig | 1 +
arch/x86/include/asm/perf_regs.h | 10 ++++
arch/x86/include/asm/perf_regs_32.h | 84 +++++++++++++++++++++++++++++
arch/x86/include/asm/perf_regs_64.h | 99 +++++++++++++++++++++++++++++++++++
include/linux/perf_regs.h | 28 ++++++++++
6 files changed, 228 insertions(+), 0 deletions(-)
create mode 100644 arch/x86/include/asm/perf_regs.h
create mode 100644 arch/x86/include/asm/perf_regs_32.h
create mode 100644 arch/x86/include/asm/perf_regs_64.h
create mode 100644 include/linux/perf_regs.h
diff --git a/arch/Kconfig b/arch/Kconfig
index e9a9108..6c37af4 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -219,6 +219,12 @@ config HAVE_PERF_EVENTS_NMI
subsystem. Also has support for calculating CPU cycle events
to determine how many clock cycles in a given period.
+config HAVE_PERF_REGS
+ bool
+ help
+ Support selective register dumps for perf events. This includes
+ bit-mapping of each registers and a unique architecture id.
+
config HAVE_ARCH_JUMP_LABEL
bool
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 5638c74..77e155c 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -59,6 +59,7 @@ config X86
select HAVE_MIXED_BREAKPOINTS_REGS
select PERF_EVENTS
select HAVE_PERF_EVENTS_NMI
+ select HAVE_PERF_REGS
select ANON_INODES
select HAVE_ALIGNED_STRUCT_PAGE if SLUB && !M386
select HAVE_CMPXCHG_LOCAL if !M386
diff --git a/arch/x86/include/asm/perf_regs.h b/arch/x86/include/asm/perf_regs.h
new file mode 100644
index 0000000..c2ea804
--- /dev/null
+++ b/arch/x86/include/asm/perf_regs.h
@@ -0,0 +1,10 @@
+#ifndef _ASM_X86_PERF_REGS_H
+#define _ASM_X86_PERF_REGS_H
+
+#ifdef CONFIG_X86_32
+#include "perf_regs_32.h"
+#else
+#include "perf_regs_64.h"
+#endif
+
+#endif /* _ASM_X86_PERF_REGS_H */
diff --git a/arch/x86/include/asm/perf_regs_32.h b/arch/x86/include/asm/perf_regs_32.h
new file mode 100644
index 0000000..8201750
--- /dev/null
+++ b/arch/x86/include/asm/perf_regs_32.h
@@ -0,0 +1,84 @@
+#ifndef _ASM_X86_PERF_REGS_32_H
+#define _ASM_X86_PERF_REGS_32_H
+
+enum perf_event_x86_32_regs {
+ PERF_X86_32_REG_EAX,
+ PERF_X86_32_REG_EBX,
+ PERF_X86_32_REG_ECX,
+ PERF_X86_32_REG_EDX,
+ PERF_X86_32_REG_ESI,
+ PERF_X86_32_REG_EDI,
+ PERF_X86_32_REG_EBP,
+ PERF_X86_32_REG_ESP,
+ PERF_X86_32_REG_EIP,
+ PERF_X86_32_REG_FLAGS,
+ PERF_X86_32_REG_CS,
+ PERF_X86_32_REG_DS,
+ PERF_X86_32_REG_ES,
+ PERF_X86_32_REG_FS,
+ PERF_X86_32_REG_GS,
+
+ /* Non ABI */
+ PERF_X86_32_REG_MAX,
+};
+
+enum {
+ PERF_REGS_ABI_X86_32 = 1UL
+};
+
+static inline u64 perf_reg_version(void)
+{
+ return PERF_REGS_ABI_X86_32;
+}
+
+#ifdef __KERNEL__
+#define PERF_X86_32_REG_RESERVED (~((1ULL << PERF_X86_32_REG_MAX) - 1ULL))
+
+static inline int perf_reg_validate(u64 mask)
+{
+ if (mask & PERF_X86_32_REG_RESERVED)
+ return -EINVAL;
+
+ return 0;
+}
+
+static inline u64 perf_reg_value(struct pt_regs *regs, int idx)
+{
+ switch (idx) {
+ case PERF_X86_32_REG_EAX:
+ return regs->ax;
+ case PERF_X86_32_REG_EBX:
+ return regs->bx;
+ case PERF_X86_32_REG_ECX:
+ return regs->cx;
+ case PERF_X86_32_REG_EDX:
+ return regs->dx;
+ case PERF_X86_32_REG_ESI:
+ return regs->si;
+ case PERF_X86_32_REG_EDI:
+ return regs->di;
+ case PERF_X86_32_REG_EBP:
+ return regs->bp;
+ case PERF_X86_32_REG_ESP:
+ return regs->sp;
+ case PERF_X86_32_REG_EIP:
+ return regs->ip;
+ case PERF_X86_32_REG_FLAGS:
+ return regs->flags;
+ case PERF_X86_32_REG_CS:
+ return regs->cs;
+ case PERF_X86_32_REG_DS:
+ return regs->ds;
+ case PERF_X86_32_REG_ES:
+ return regs->es;
+ case PERF_X86_32_REG_FS:
+ return regs->fs;
+ case PERF_X86_32_REG_GS:
+ return regs->gs;
+ }
+
+ return 0;
+}
+
+#endif /* __KERNEL__ */
+#endif /* _ASM_X86_PERF_REGS_32_H */
diff --git a/arch/x86/include/asm/perf_regs_64.h b/arch/x86/include/asm/perf_regs_64.h
new file mode 100644
index 0000000..63d7f1f
--- /dev/null
+++ b/arch/x86/include/asm/perf_regs_64.h
@@ -0,0 +1,99 @@
+#ifndef _ASM_X86_PERF_REGS_64_H
+#define _ASM_X86_PERF_REGS_64_H
+
+enum perf_event_x86_64_regs {
+ PERF_X86_64_REG_RAX,
+ PERF_X86_64_REG_RBX,
+ PERF_X86_64_REG_RCX,
+ PERF_X86_64_REG_RDX,
+ PERF_X86_64_REG_RSI,
+ PERF_X86_64_REG_RDI,
+ PERF_X86_64_REG_R8,
+ PERF_X86_64_REG_R9,
+ PERF_X86_64_REG_R10,
+ PERF_X86_64_REG_R11,
+ PERF_X86_64_REG_R12,
+ PERF_X86_64_REG_R13,
+ PERF_X86_64_REG_R14,
+ PERF_X86_64_REG_R15,
+ PERF_X86_64_REG_RBP,
+ PERF_X86_64_REG_RSP,
+ PERF_X86_64_REG_RIP,
+ PERF_X86_64_REG_FLAGS,
+ PERF_X86_64_REG_CS,
+ PERF_X86_64_REG_SS,
+
+ /* Non ABI */
+ PERF_X86_64_REG_MAX,
+};
+
+enum {
+ PERF_REGS_ABI_X86_64 = 2UL
+};
+
+static inline u64 perf_reg_version(void)
+{
+ return PERF_REGS_ABI_X86_64;
+}
+
+#ifdef __KERNEL__
+#define PERF_X86_64_REG_RESERVED (~((1ULL << PERF_X86_64_REG_MAX) - 1ULL))
+
+static inline int perf_reg_validate(u64 mask)
+{
+ if (mask & PERF_X86_64_REG_RESERVED)
+ return -EINVAL;
+
+ return 0;
+}
+
+static inline u64 perf_reg_value(struct pt_regs *regs, int idx)
+{
+ switch (idx) {
+ case PERF_X86_64_REG_RAX:
+ return regs->ax;
+ case PERF_X86_64_REG_RBX:
+ return regs->bx;
+ case PERF_X86_64_REG_RCX:
+ return regs->cx;
+ case PERF_X86_64_REG_RDX:
+ return regs->dx;
+ case PERF_X86_64_REG_RSI:
+ return regs->si;
+ case PERF_X86_64_REG_RDI:
+ return regs->di;
+ case PERF_X86_64_REG_R8:
+ return regs->r8;
+ case PERF_X86_64_REG_R9:
+ return regs->r9;
+ case PERF_X86_64_REG_R10:
+ return regs->r10;
+ case PERF_X86_64_REG_R11:
+ return regs->r11;
+ case PERF_X86_64_REG_R12:
+ return regs->r12;
+ case PERF_X86_64_REG_R13:
+ return regs->r13;
+ case PERF_X86_64_REG_R14:
+ return regs->r14;
+ case PERF_X86_64_REG_R15:
+ return regs->r15;
+ case PERF_X86_64_REG_RBP:
+ return regs->bp;
+ case PERF_X86_64_REG_RSP:
+ return regs->sp;
+ case PERF_X86_64_REG_RIP:
+ return regs->ip;
+ case PERF_X86_64_REG_FLAGS:
+ return regs->flags;
+ case PERF_X86_64_REG_CS:
+ return regs->cs;
+ case PERF_X86_64_REG_SS:
+ return regs->ss;
+ }
+
+ return 0;
+}
+
+#endif /* __KERNEL__ */
+#endif /* _ASM_X86_PERF_REGS_64_H */
diff --git a/include/linux/perf_regs.h b/include/linux/perf_regs.h
new file mode 100644
index 0000000..3d761d5
--- /dev/null
+++ b/include/linux/perf_regs.h
@@ -0,0 +1,28 @@
+#ifndef _LINUX_PERF_REGS_H
+#define _LINUX_PERF_REGS_H
+
+enum {
+ PERF_REGS_ABI_NONE = 0UL,
+};
+
+#ifdef CONFIG_HAVE_PERF_REGS
+#include <asm/perf_regs.h>
+#else
+static inline unsigned long perf_reg_version(void)
+{
+ return PERF_REGS_ABI_NONE;
+}
+
+#ifdef __KERNEL__
+static inline unsigned long perf_reg_value(struct pt_regs *regs, int idx)
+{
+ return 0;
+}
+
+static inline int perf_reg_validate(u64 mask)
+{
+ return mask ? -ENOSYS : 0;
+}
+#endif /* __KERNEL__ */
+#endif /* CONFIG_HAVE_PERF_REGS */
+#endif /* __ASM_GENERIC_PERF_REGS_H */
--
1.7.7.6
--
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