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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Jan 2026 03:35:21.5410 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b5ff98ae-d96a-4f6a-8cf6-08de54b04706 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN2PEPF000044A2.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB9210 Patches 1-5: o Resolve several issues in the current IBS implementation Patches 6-11: o Add support for new capabilities that will appear in future AMD CPUs: - Alternate disable bit in with control only MSRs to eliminate the RMW race in existing IBS_{FETCH|OP}_CTL MSRs - RIP bit 63 filtering, which can be used as hardware assisted privilege filtering, enabling IBS for unprivileged users without software based privilege filtering - Fetch latency threshold filter to capture only high-latency fetch events - Streaming-store filter to sample only instructions that perform streaming stores - Remote socket indicator for load/store instructions Patches are prepared on tip/perf/core (eebe6446ccb7) TODO: o perf tool and man page changes o perf test "AMD IBS software filtering" is failing on system that supports RIP bit63 filtering, but it's false-positive. I'll post a fix along with perf tools changes Ravi Bangoria (11): perf/amd/ibs: Throttle interrupts with filtered ldlat samples perf/amd/ibs: Limit ldlat->l3missonly dependency to Zen5 perf/amd/ibs: Preserve PhyAddrVal bit when clearing PhyAddr MSR perf/amd/ibs: Avoid race between event add and NMI perf/amd/ibs: Define macro for ldlat mask perf/amd/ibs: Add new MSRs and CPUID bits definitions perf/amd/ibs: Support IBS_{FETCH|OP}_CTL2[Dis] to eliminate RMW race perf/amd/ibs: Enable fetch latency filtering perf/amd/ibs: Enable RIP bit63 hardware filtering perf/amd/ibs: Enable streaming store filter perf/amd/ibs: Advertise remote socket capability arch/x86/events/amd/ibs.c | 252 ++++++++++++++++++++++++++++-- arch/x86/include/asm/amd/ibs.h | 4 +- arch/x86/include/asm/msr-index.h | 2 + arch/x86/include/asm/perf_event.h | 52 +++--- 4 files changed, 275 insertions(+), 35 deletions(-) -- 2.43.0