1 files changed, 341 insertions, 0 deletions
diff --git a/tools/perf/util/amd-sample-raw.c b/tools/perf/util/amd-sample-raw.c
new file mode 100644
index 000000000..238305868
--- /dev/null
+++ b/tools/perf/util/amd-sample-raw.c
@@ -0,0 +1,341 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * AMD specific. Provide textual annotation for IBS raw sample data.
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+
+#include <linux/string.h>
+#include "../../arch/x86/include/asm/amd-ibs.h"
+
+#include "debug.h"
+#include "session.h"
+#include "evlist.h"
+#include "sample-raw.h"
+#include "pmu-events/pmu-events.h"
+
+static u32 cpu_family, cpu_model, ibs_fetch_type, ibs_op_type;
+static bool zen4_ibs_extensions;
+
+static void pr_ibs_fetch_ctl(union ibs_fetch_ctl reg)
+{
+	const char * const ic_miss_strs[] = {
+		" IcMiss 0",
+		" IcMiss 1",
+	};
+	const char * const l1tlb_pgsz_strs[] = {
+		" L1TlbPgSz 4KB",
+		" L1TlbPgSz 2MB",
+		" L1TlbPgSz 1GB",
+		" L1TlbPgSz RESERVED"
+	};
+	const char * const l1tlb_pgsz_strs_erratum1347[] = {
+		" L1TlbPgSz 4KB",
+		" L1TlbPgSz 16KB",
+		" L1TlbPgSz 2MB",
+		" L1TlbPgSz 1GB"
+	};
+	const char *ic_miss_str = NULL;
+	const char *l1tlb_pgsz_str = NULL;
+	char l3_miss_str[sizeof(" L3MissOnly _ FetchOcMiss _ FetchL3Miss _")] = "";
+
+	if (cpu_family == 0x19 && cpu_model < 0x10) {
+		/*
+		 * Erratum #1238 workaround is to ignore MSRC001_1030[IbsIcMiss]
+		 * Erratum #1347 workaround is to use table provided in erratum
+		 */
+		if (reg.phy_addr_valid)
+			l1tlb_pgsz_str = l1tlb_pgsz_strs_erratum1347[reg.l1tlb_pgsz];
+	} else {
+		if (reg.phy_addr_valid)
+			l1tlb_pgsz_str = l1tlb_pgsz_strs[reg.l1tlb_pgsz];
+		ic_miss_str = ic_miss_strs[reg.ic_miss];
+	}
+
+	if (zen4_ibs_extensions) {
+		snprintf(l3_miss_str, sizeof(l3_miss_str),
+			 " L3MissOnly %d FetchOcMiss %d FetchL3Miss %d",
+			 reg.l3_miss_only, reg.fetch_oc_miss, reg.fetch_l3_miss);
+	}
+
+	printf("ibs_fetch_ctl:\t%016llx MaxCnt %7d Cnt %7d Lat %5d En %d Val %d Comp %d%s "
+		"PhyAddrValid %d%s L1TlbMiss %d L2TlbMiss %d RandEn %d%s%s\n",
+		reg.val, reg.fetch_maxcnt << 4, reg.fetch_cnt << 4, reg.fetch_lat,
+		reg.fetch_en, reg.fetch_val, reg.fetch_comp, ic_miss_str ? : "",
+		reg.phy_addr_valid, l1tlb_pgsz_str ? : "", reg.l1tlb_miss, reg.l2tlb_miss,
+		reg.rand_en, reg.fetch_comp ? (reg.fetch_l2_miss ? " L2Miss 1" : " L2Miss 0") : "",
+		l3_miss_str);
+}
+
+static void pr_ic_ibs_extd_ctl(union ic_ibs_extd_ctl reg)
+{
+	printf("ic_ibs_ext_ctl:\t%016llx IbsItlbRefillLat %3d\n", reg.val, reg.itlb_refill_lat);
+}
+
+static void pr_ibs_op_ctl(union ibs_op_ctl reg)
+{
+	char l3_miss_only[sizeof(" L3MissOnly _")] = "";
+
+	if (zen4_ibs_extensions)
+		snprintf(l3_miss_only, sizeof(l3_miss_only), " L3MissOnly %d", reg.l3_miss_only);
+
+	printf("ibs_op_ctl:\t%016llx MaxCnt %9d%s En %d Val %d CntCtl %d=%s CurCnt %9d\n",
+		reg.val, ((reg.opmaxcnt_ext << 16) | reg.opmaxcnt) << 4, l3_miss_only,
+		reg.op_en, reg.op_val, reg.cnt_ctl,
+		reg.cnt_ctl ? "uOps" : "cycles", reg.opcurcnt);
+}
+
+static void pr_ibs_op_data(union ibs_op_data reg)
+{
+	printf("ibs_op_data:\t%016llx CompToRetCtr %5d TagToRetCtr %5d%s%s%s BrnRet %d "
+		" RipInvalid %d BrnFuse %d Microcode %d\n",
+		reg.val, reg.comp_to_ret_ctr, reg.tag_to_ret_ctr,
+		reg.op_brn_ret ? (reg.op_return ? " OpReturn 1" : " OpReturn 0") : "",
+		reg.op_brn_ret ? (reg.op_brn_taken ? " OpBrnTaken 1" : " OpBrnTaken 0") : "",
+		reg.op_brn_ret ? (reg.op_brn_misp ? " OpBrnMisp 1" : " OpBrnMisp 0") : "",
+		reg.op_brn_ret, reg.op_rip_invalid, reg.op_brn_fuse, reg.op_microcode);
+}
+
+static void pr_ibs_op_data2_extended(union ibs_op_data2 reg)
+{
+	static const char * const data_src_str[] = {
+		"",
+		" DataSrc 1=Local L3 or other L1/L2 in CCX",
+		" DataSrc 2=A peer cache in a near CCX",
+		" DataSrc 3=Data returned from DRAM",
+		" DataSrc 4=(reserved)",
+		" DataSrc 5=A peer cache in a far CCX",
+		" DataSrc 6=DRAM address map with \"long latency\" bit set",
+		" DataSrc 7=Data returned from MMIO/Config/PCI/APIC",
+		" DataSrc 8=Extension Memory (S-Link, GenZ, etc)",
+		" DataSrc 9=(reserved)",
+		" DataSrc 10=(reserved)",
+		" DataSrc 11=(reserved)",
+		" DataSrc 12=Peer Agent Memory",
+		/* 13 to 31 are reserved. Avoid printing them. */
+	};
+	int data_src = (reg.data_src_hi << 3) | reg.data_src_lo;
+
+	printf("ibs_op_data2:\t%016llx %sRmtNode %d%s\n", reg.val,
+		(data_src == 1 || data_src == 2 || data_src == 5) ?
+			(reg.cache_hit_st ? "CacheHitSt 1=O-State " : "CacheHitSt 0=M-state ") : "",
+		reg.rmt_node,
+		data_src < (int)ARRAY_SIZE(data_src_str) ? data_src_str[data_src] : "");
+}
+
+static void pr_ibs_op_data2_default(union ibs_op_data2 reg)
+{
+	static const char * const data_src_str[] = {
+		"",
+		" DataSrc 1=(reserved)",
+		" DataSrc 2=Local node cache",
+		" DataSrc 3=DRAM",
+		" DataSrc 4=Remote node cache",
+		" DataSrc 5=(reserved)",
+		" DataSrc 6=(reserved)",
+		" DataSrc 7=Other"
+	};
+
+	printf("ibs_op_data2:\t%016llx %sRmtNode %d%s\n", reg.val,
+	       reg.data_src_lo == 2 ? (reg.cache_hit_st ? "CacheHitSt 1=O-State "
+						     : "CacheHitSt 0=M-state ") : "",
+	       reg.rmt_node, data_src_str[reg.data_src_lo]);
+}
+
+static void pr_ibs_op_data2(union ibs_op_data2 reg)
+{
+	if (zen4_ibs_extensions)
+		return pr_ibs_op_data2_extended(reg);
+	pr_ibs_op_data2_default(reg);
+}
+
+static void pr_ibs_op_data3(union ibs_op_data3 reg)
+{
+	char l2_miss_str[sizeof(" L2Miss _")] = "";
+	char op_mem_width_str[sizeof(" OpMemWidth _____ bytes")] = "";
+	char op_dc_miss_open_mem_reqs_str[sizeof(" OpDcMissOpenMemReqs __")] = "";
+
+	/*
+	 * Erratum #1293
+	 * Ignore L2Miss and OpDcMissOpenMemReqs (and opdata2) if DcMissNoMabAlloc or SwPf set
+	 */
+	if (!(cpu_family == 0x19 && cpu_model < 0x10 && (reg.dc_miss_no_mab_alloc || reg.sw_pf))) {
+		snprintf(l2_miss_str, sizeof(l2_miss_str), " L2Miss %d", reg.l2_miss);
+		snprintf(op_dc_miss_open_mem_reqs_str, sizeof(op_dc_miss_open_mem_reqs_str),
+			 " OpDcMissOpenMemReqs %2d", reg.op_dc_miss_open_mem_reqs);
+	}
+
+	if (reg.op_mem_width)
+		snprintf(op_mem_width_str, sizeof(op_mem_width_str),
+			 " OpMemWidth %2d bytes", 1 << (reg.op_mem_width - 1));
+
+	printf("ibs_op_data3:\t%016llx LdOp %d StOp %d DcL1TlbMiss %d DcL2TlbMiss %d "
+		"DcL1TlbHit2M %d DcL1TlbHit1G %d DcL2TlbHit2M %d DcMiss %d DcMisAcc %d "
+		"DcWcMemAcc %d DcUcMemAcc %d DcLockedOp %d DcMissNoMabAlloc %d DcLinAddrValid %d "
+		"DcPhyAddrValid %d DcL2TlbHit1G %d%s SwPf %d%s%s DcMissLat %5d TlbRefillLat %5d\n",
+		reg.val, reg.ld_op, reg.st_op, reg.dc_l1tlb_miss, reg.dc_l2tlb_miss,
+		reg.dc_l1tlb_hit_2m, reg.dc_l1tlb_hit_1g, reg.dc_l2tlb_hit_2m, reg.dc_miss,
+		reg.dc_mis_acc, reg.dc_wc_mem_acc, reg.dc_uc_mem_acc, reg.dc_locked_op,
+		reg.dc_miss_no_mab_alloc, reg.dc_lin_addr_valid, reg.dc_phy_addr_valid,
+		reg.dc_l2_tlb_hit_1g, l2_miss_str, reg.sw_pf, op_mem_width_str,
+		op_dc_miss_open_mem_reqs_str, reg.dc_miss_lat, reg.tlb_refill_lat);
+}
+
+/*
+ * IBS Op/Execution MSRs always saved, in order, are:
+ * IBS_OP_CTL, IBS_OP_RIP, IBS_OP_DATA, IBS_OP_DATA2,
+ * IBS_OP_DATA3, IBS_DC_LINADDR, IBS_DC_PHYSADDR, BP_IBSTGT_RIP
+ */
+static void amd_dump_ibs_op(struct perf_sample *sample)
+{
+	struct perf_ibs_data *data = sample->raw_data;
+	union ibs_op_ctl *op_ctl = (union ibs_op_ctl *)data->data;
+	__u64 *rip = (__u64 *)op_ctl + 1;
+	union ibs_op_data *op_data = (union ibs_op_data *)(rip + 1);
+	union ibs_op_data3 *op_data3 = (union ibs_op_data3 *)(rip + 3);
+
+	pr_ibs_op_ctl(*op_ctl);
+	if (!op_data->op_rip_invalid)
+		printf("IbsOpRip:\t%016llx\n", *rip);
+	pr_ibs_op_data(*op_data);
+	/*
+	 * Erratum #1293: ignore op_data2 if DcMissNoMabAlloc or SwPf are set
+	 */
+	if (!(cpu_family == 0x19 && cpu_model < 0x10 &&
+	      (op_data3->dc_miss_no_mab_alloc || op_data3->sw_pf)))
+		pr_ibs_op_data2(*(union ibs_op_data2 *)(rip + 2));
+	pr_ibs_op_data3(*op_data3);
+	if (op_data3->dc_lin_addr_valid)
+		printf("IbsDCLinAd:\t%016llx\n", *(rip + 4));
+	if (op_data3->dc_phy_addr_valid)
+		printf("IbsDCPhysAd:\t%016llx\n", *(rip + 5));
+	if (op_data->op_brn_ret && *(rip + 6))
+		printf("IbsBrTarget:\t%016llx\n", *(rip + 6));
+}
+
+/*
+ * IBS Fetch MSRs always saved, in order, are:
+ * IBS_FETCH_CTL, IBS_FETCH_LINADDR, IBS_FETCH_PHYSADDR, IC_IBS_EXTD_CTL
+ */
+static void amd_dump_ibs_fetch(struct perf_sample *sample)
+{
+	struct perf_ibs_data *data = sample->raw_data;
+	union ibs_fetch_ctl *fetch_ctl = (union ibs_fetch_ctl *)data->data;
+	__u64 *addr = (__u64 *)fetch_ctl + 1;
+	union ic_ibs_extd_ctl *extd_ctl = (union ic_ibs_extd_ctl *)addr + 2;
+
+	pr_ibs_fetch_ctl(*fetch_ctl);
+	printf("IbsFetchLinAd:\t%016llx\n", *addr++);
+	if (fetch_ctl->phy_addr_valid)
+		printf("IbsFetchPhysAd:\t%016llx\n", *addr);
+	pr_ic_ibs_extd_ctl(*extd_ctl);
+}
+
+/*
+ * Test for enable and valid bits in captured control MSRs.
+ */
+static bool is_valid_ibs_fetch_sample(struct perf_sample *sample)
+{
+	struct perf_ibs_data *data = sample->raw_data;
+	union ibs_fetch_ctl *fetch_ctl = (union ibs_fetch_ctl *)data->data;
+
+	if (fetch_ctl->fetch_en && fetch_ctl->fetch_val)
+		return true;
+
+	return false;
+}
+
+static bool is_valid_ibs_op_sample(struct perf_sample *sample)
+{
+	struct perf_ibs_data *data = sample->raw_data;
+	union ibs_op_ctl *op_ctl = (union ibs_op_ctl *)data->data;
+
+	if (op_ctl->op_en && op_ctl->op_val)
+		return true;
+
+	return false;
+}
+
+/* AMD vendor specific raw sample function. Check for PERF_RECORD_SAMPLE events
+ * and if the event was triggered by IBS, display its raw data with decoded text.
+ * The function is only invoked when the dump flag -D is set.
+ */
+void evlist__amd_sample_raw(struct evlist *evlist, union perf_event *event,
+			    struct perf_sample *sample)
+{
+	struct evsel *evsel;
+
+	if (event->header.type != PERF_RECORD_SAMPLE || !sample->raw_size)
+		return;
+
+	evsel = evlist__event2evsel(evlist, event);
+	if (!evsel)
+		return;
+
+	if (evsel->core.attr.type == ibs_fetch_type) {
+		if (!is_valid_ibs_fetch_sample(sample)) {
+			pr_debug("Invalid raw IBS Fetch MSR data encountered\n");
+			return;
+		}
+		amd_dump_ibs_fetch(sample);
+	} else if (evsel->core.attr.type == ibs_op_type) {
+		if (!is_valid_ibs_op_sample(sample)) {
+			pr_debug("Invalid raw IBS Op MSR data encountered\n");
+			return;
+		}
+		amd_dump_ibs_op(sample);
+	}
+}
+
+static void parse_cpuid(struct perf_env *env)
+{
+	const char *cpuid;
+	int ret;
+
+	cpuid = perf_env__cpuid(env);
+	/*
+	 * cpuid = "AuthenticAMD,family,model,stepping"
+	 */
+	ret = sscanf(cpuid, "%*[^,],%u,%u", &cpu_family, &cpu_model);
+	if (ret != 2)
+		pr_debug("problem parsing cpuid\n");
+}
+
+/*
+ * Find and assign the type number used for ibs_op or ibs_fetch samples.
+ * Device names can be large - we are only interested in the first 9 characters,
+ * to match "ibs_fetch".
+ */
+bool evlist__has_amd_ibs(struct evlist *evlist)
+{
+	struct perf_env *env = evlist->env;
+	int ret, nr_pmu_mappings = perf_env__nr_pmu_mappings(env);
+	const char *pmu_mapping = perf_env__pmu_mappings(env);
+	char name[sizeof("ibs_fetch")];
+	u32 type;
+
+	while (nr_pmu_mappings--) {
+		ret = sscanf(pmu_mapping, "%u:%9s", &type, name);
+		if (ret == 2) {
+			if (strstarts(name, "ibs_op"))
+				ibs_op_type = type;
+			else if (strstarts(name, "ibs_fetch"))
+				ibs_fetch_type = type;
+		}
+		pmu_mapping += strlen(pmu_mapping) + 1 /* '\0' */;
+	}
+
+	if (perf_env__find_pmu_cap(env, "ibs_op", "zen4_ibs_extensions"))
+		zen4_ibs_extensions = 1;
+
+	if (ibs_fetch_type || ibs_op_type) {
+		if (!cpu_family)
+			parse_cpuid(env);
+		return true;
+	}
+
+	return false;
+}