diff options
| author | Glenn Miles <milesg@linux.vnet.ibm.com> | 2024-03-28 20:41:33 +1000 |
|---|---|---|
| committer | Nicholas Piggin <npiggin@gmail.com> | 2024-05-24 09:33:06 +1000 |
| commit | 4de4a4705f234861176b32292374021ee96e004e (patch) | |
| tree | 9e26e1d780a9fdadcfd3069a7adb842860caddf3 /target/ppc/power8-pmu.h | |
| parent | a7138e28a242680ae25b52ed44842cde235103f0 (diff) | |
target/ppc: Add recording of taken branches to BHRB
This commit continues adding support for the Branch History
Rolling Buffer (BHRB) as is provided starting with the P8
processor and continuing with its successors. This commit
is limited to the recording and filtering of taken branches.
The following changes were made:
- Enabled functionality on P10 processors only due to
performance impact seen with P8 and P9 where it is not
disabled for non problem state branches.
- Added a BHRB buffer for storing branch instruction and
target addresses for taken branches
- Renamed gen_update_cfar to gen_update_branch_history and
added a 'target' parameter to hold the branch target
address and 'inst_type' parameter to use for filtering
- Added TCG code to gen_update_branch_history that stores
data to the BHRB and updates the BHRB offset.
- Added BHRB resource initialization and reset functions
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Glenn Miles <milesg@linux.vnet.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Diffstat (limited to 'target/ppc/power8-pmu.h')
| -rw-r--r-- | target/ppc/power8-pmu.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/target/ppc/power8-pmu.h b/target/ppc/power8-pmu.h index 87fa8c9334..3f79cfc45b 100644 --- a/target/ppc/power8-pmu.h +++ b/target/ppc/power8-pmu.h @@ -13,6 +13,13 @@ #ifndef POWER8_PMU_H #define POWER8_PMU_H +#define BHRB_TYPE_NORECORD 0x00 +#define BHRB_TYPE_CALL 0x01 +#define BHRB_TYPE_INDIRECT 0x02 +#define BHRB_TYPE_COND 0x04 +#define BHRB_TYPE_OTHER 0x08 +#define BHRB_TYPE_XL_FORM 0x10 + #if defined(TARGET_PPC64) && !defined(CONFIG_USER_ONLY) #define PMC_COUNTER_NEGATIVE_VAL 0x80000000UL |