diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-5.15/0061-perf-x86-amd-Add-branch-brs-helper-event-for-Fam19h-.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-5.15/0061-perf-x86-amd-Add-branch-brs-helper-event-for-Fam19h-.patch | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-5.15/0061-perf-x86-amd-Add-branch-brs-helper-event-for-Fam19h-.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-5.15/0061-perf-x86-amd-Add-branch-brs-helper-event-for-Fam19h-.patch new file mode 100644 index 00000000..c5f1e1cc --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-5.15/0061-perf-x86-amd-Add-branch-brs-helper-event-for-Fam19h-.patch @@ -0,0 +1,55 @@ +From 74f949e5e8a95cc6d9e8eae42768ba5e814a8eb0 Mon Sep 17 00:00:00 2001 +From: Stephane Eranian <eranian@google.com> +Date: Tue, 22 Mar 2022 15:15:08 -0700 +Subject: [PATCH 61/86] perf/x86/amd: Add branch-brs helper event for Fam19h + BRS + +commit 44175993efbae04e8b2d7f7795ff512c3a726db0 upstream + +Add a pseudo event called branch-brs to help use the FAM Fam19h +Branch Sampling feature (BRS). BRS samples taken branches, so it is best used +when sampling on a retired taken branch event (0xc4) which is what BRS +captures. Instead of trying to remember the event code or actual event name, +users can simply do: + +$ perf record -b -e cpu/branch-brs/ -c 1000037 ..... + +Signed-off-by: Stephane Eranian <eranian@google.com> +Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> +Link: https://lore.kernel.org/r/20220322221517.2510440-5-eranian@google.com +Signed-off-by: Zhaolong Zhang <zhaolong.zhang@windriver.com> +--- + arch/x86/events/amd/core.c | 15 +++++++++++++++ + 1 file changed, 15 insertions(+) + +diff --git a/arch/x86/events/amd/core.c b/arch/x86/events/amd/core.c +index c7ac70d8ed9a..f7bce8364fe4 100644 +--- a/arch/x86/events/amd/core.c ++++ b/arch/x86/events/amd/core.c +@@ -1145,8 +1145,23 @@ static struct attribute_group group_caps_amd_brs = { + .is_visible = amd_brs_is_visible, + }; + ++EVENT_ATTR_STR(branch-brs, amd_branch_brs, ++ "event=" __stringify(AMD_FAM19H_BRS_EVENT)"\n"); ++ ++static struct attribute *amd_brs_events_attrs[] = { ++ EVENT_PTR(amd_branch_brs), ++ NULL, ++}; ++ ++static struct attribute_group group_events_amd_brs = { ++ .name = "events", ++ .attrs = amd_brs_events_attrs, ++ .is_visible = amd_brs_is_visible, ++}; ++ + static const struct attribute_group *amd_attr_update[] = { + &group_caps_amd_brs, ++ &group_events_amd_brs, + NULL, + }; + +-- +2.37.3 + |