korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-09-22 04:31:58 +08:00
Code Issues Packages Projects Releases Wiki Activity

perf intel_pt: Add vmlaunch and vmresume as branches

Browse Source 
In preparation to support Intel PT decoding of virtual machine traces, add
vmlaunch and vmresume as branch instructions.

Note, sample flags will show "VMentry" even if the VM-Entry fails.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lore.kernel.org/r/20210218095801.19576-3-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2021-02-18 11:57:52 +02:00 committed by Arnaldo Carvalho de Melo
parent c025d46cd9
commit b7ecc2d73e
3 changed files with 17 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
tools/perf/arch/x86/tests/insn-x86.c
View File

@ -48,6 +48,7 @@ static int get_op(const char *op_str)
{"int", INTEL_PT_OP_INT},
{"syscall", INTEL_PT_OP_SYSCALL},
{"sysret", INTEL_PT_OP_SYSRET},
{"vmentry", INTEL_PT_OP_VMENTRY},
{NULL, 0},
};
struct val_data *val;

15
tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.c
View File

@ -43,6 +43,17 @@ static void intel_pt_insn_decoder(struct insn *insn,
switch (insn->opcode.bytes[0]) {
case 0xf:
switch (insn->opcode.bytes[1]) {
case 0x01:
switch (insn->modrm.bytes[0]) {
case 0xc2: /* vmlaunch */
case 0xc3: /* vmresume */
op = INTEL_PT_OP_VMENTRY;
branch = INTEL_PT_BR_INDIRECT;
break;
default:
break;
}
break;
case 0x05: /* syscall */
case 0x34: /* sysenter */
op = INTEL_PT_OP_SYSCALL;
@ -213,6 +224,7 @@ const char *branch_name[] = {
[INTEL_PT_OP_INT] = "Int",
[INTEL_PT_OP_SYSCALL] = "Syscall",
[INTEL_PT_OP_SYSRET] = "Sysret",
[INTEL_PT_OP_VMENTRY] = "VMentry",
};
const char *intel_pt_insn_name(enum intel_pt_insn_op op)
@ -267,6 +279,9 @@ int intel_pt_insn_type(enum intel_pt_insn_op op)
case INTEL_PT_OP_SYSRET:
return PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN |
PERF_IP_FLAG_SYSCALLRET;
case INTEL_PT_OP_VMENTRY:
return PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL |
PERF_IP_FLAG_VMENTRY;
default:
return 0;
}

1
tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.h
View File

@ -24,6 +24,7 @@ enum intel_pt_insn_op {
INTEL_PT_OP_INT,
INTEL_PT_OP_SYSCALL,
INTEL_PT_OP_SYSRET,
INTEL_PT_OP_VMENTRY,
};
enum intel_pt_insn_branch {