From: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@xxxxxxx> This patch has been added to the 3.12 stable tree. If you have any objections, please let us know. =============== commit 904cb3677f3adcd3d837be0a0d0b14251ba8d6f7 upstream. New Fam15h models carry extra feature bits and extend the MSR register space for IBS ops. Adding them here. While at it, add functionality to read IbsBrTarget and OpData4 depending on their availability if user wants a PERF_SAMPLE_RAW. Signed-off-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@xxxxxxx> Acked-by: Borislav Petkov <bp@xxxxxxx> Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx> Cc: Jan Kiszka <jan.kiszka@xxxxxxxxxxx> Cc: Len Brown <len.brown@xxxxxxxxx> Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: <paulus@xxxxxxxxx> Cc: <acme@xxxxxxxxxx> Link: http://lkml.kernel.org/r/1415651066-13523-1-git-send-email-Aravind.Gopalakrishnan@xxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> --- arch/x86/include/asm/perf_event.h | 3 +++ arch/x86/include/uapi/asm/msr-index.h | 1 + arch/x86/kernel/cpu/perf_event_amd_ibs.c | 15 +++++++++++++++ 3 files changed, 19 insertions(+) diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h index 8249df45d2f2..348d9ac94d4e 100644 --- a/arch/x86/include/asm/perf_event.h +++ b/arch/x86/include/asm/perf_event.h @@ -169,6 +169,9 @@ struct x86_pmu_capability { #define IBS_CAPS_BRNTRGT (1U<<5) #define IBS_CAPS_OPCNTEXT (1U<<6) #define IBS_CAPS_RIPINVALIDCHK (1U<<7) +#define IBS_CAPS_OPBRNFUSE (1U<<8) +#define IBS_CAPS_FETCHCTLEXTD (1U<<9) +#define IBS_CAPS_OPDATA4 (1U<<10) #define IBS_CAPS_DEFAULT (IBS_CAPS_AVAIL \ | IBS_CAPS_FETCHSAM \ diff --git a/arch/x86/include/uapi/asm/msr-index.h b/arch/x86/include/uapi/asm/msr-index.h index 228d95f6592a..dbb591390b9e 100644 --- a/arch/x86/include/uapi/asm/msr-index.h +++ b/arch/x86/include/uapi/asm/msr-index.h @@ -201,6 +201,7 @@ #define MSR_AMD64_IBSOP_REG_MASK ((1UL<<MSR_AMD64_IBSOP_REG_COUNT)-1) #define MSR_AMD64_IBSCTL 0xc001103a #define MSR_AMD64_IBSBRTARGET 0xc001103b +#define MSR_AMD64_IBSOPDATA4 0xc001103d #define MSR_AMD64_IBS_REG_COUNT_MAX 8 /* includes MSR_AMD64_IBSBRTARGET */ /* Fam 16h MSRs */ diff --git a/arch/x86/kernel/cpu/perf_event_amd_ibs.c b/arch/x86/kernel/cpu/perf_event_amd_ibs.c index 4b8e4d3cd6ea..6a4b5456240a 100644 --- a/arch/x86/kernel/cpu/perf_event_amd_ibs.c +++ b/arch/x86/kernel/cpu/perf_event_amd_ibs.c @@ -565,6 +565,21 @@ static int perf_ibs_handle_irq(struct perf_ibs *perf_ibs, struct pt_regs *iregs) perf_ibs->offset_max, offset + 1); } while (offset < offset_max); + if (event->attr.sample_type & PERF_SAMPLE_RAW) { + /* + * Read IbsBrTarget and IbsOpData4 separately + * depending on their availability. + * Can't add to offset_max as they are staggered + */ + if (ibs_caps & IBS_CAPS_BRNTRGT) { + rdmsrl(MSR_AMD64_IBSBRTARGET, *buf++); + size++; + } + if (ibs_caps & IBS_CAPS_OPDATA4) { + rdmsrl(MSR_AMD64_IBSOPDATA4, *buf++); + size++; + } + } ibs_data.size = sizeof(u64) * size; regs = *iregs; -- 2.4.1 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html