Re: [PATCH 4/6] Reduce the number of mandatory PMU events.

Heinrich Schuchardt

Am 19. November 2021 01:09:32 MEZ schrieb atishp@...:
Last level cache and NUMA node cache events are not specific to per hart.
Do not make them mandatory for per hart performance monitor events.

Signed-off-by: Atish Patra <atishp@...>
riscv-platform-spec.adoc | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/riscv-platform-spec.adoc b/riscv-platform-spec.adoc
index 78ceae532f96..8798e71a18e5 100644
--- a/riscv-platform-spec.adoc
+++ b/riscv-platform-spec.adoc
@@ -593,9 +593,10 @@ accesses should not take address misaligned exceptions.
*** The platform must implement all of the general hardware events defined by
the SBI PMU extension.
** Hardware cache events
-*** The platform must implement all of the hardware cache events for READ
-operations while WRITE operation must be implemented for L1D, LL and DTLB
+*** The platform must implement READ operations for all of the hardware cache
+events except SBI_PMU_HW_CACHE_NODE and SBI_PMU_HW_CACHE_LL defined in the SBI
+PMU extension.
+*** Thue platform must implement WRITE operation for L1D, and DTLB caches.

Best regards



Join to automatically receive all group messages.