perf/x86/amd/ibs: Update IBS MSRs and feature definitions

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 <[email protected]>
Acked-by: Borislav Petkov <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: Jan Kiszka <[email protected]>
Cc: Len Brown <[email protected]>
Cc: Fenghua Yu <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

Author: Aravind Gopalakrishnan

arch/x86/include/asm/perf_event.h

@@ -177,6 +177,9 @@ 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	\

arch/x86/include/uapi/asm/msr-index.h

@@ -206,6 +206,7 @@
 #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 */

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;