diff options
| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2020-11-24 18:24:58 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-12-09 15:48:13 +0300 |
| commit | 89eecd938cab80f0da18abbd2ed997a521f83f01 (patch) | |
| tree | d073ccf6ef54e78b793d7fd29a4880264d9675ee /arch/powerpc/perf | |
| parent | a314ea5abf6dbaf35f14c9bd1d93105260fb9336 (diff) | |
| download | linux-89eecd938cab80f0da18abbd2ed997a521f83f01.tar.xz | |
powerpc/8xx: Use SPRN_SPRG_SCRATCH2 in DTLB miss exception
Use SPRN_SPRG_SCRATCH2 in DTLB miss exception instead of DAR
in order to be similar to ITLB miss exception.
This also simplifies mpc8xx_pmu_del()
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/e3cc8f023ef40e1e8ae144e4dd1330a5ff022528.1606231483.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/perf')
| -rw-r--r-- | arch/powerpc/perf/8xx-pmu.c | 19 |
1 files changed, 7 insertions, 12 deletions
diff --git a/arch/powerpc/perf/8xx-pmu.c b/arch/powerpc/perf/8xx-pmu.c index 02db58c7427a..93004ee586a1 100644 --- a/arch/powerpc/perf/8xx-pmu.c +++ b/arch/powerpc/perf/8xx-pmu.c @@ -153,6 +153,11 @@ static void mpc8xx_pmu_read(struct perf_event *event) static void mpc8xx_pmu_del(struct perf_event *event, int flags) { + struct ppc_inst insn; + + /* mfspr r10, SPRN_SPRG_SCRATCH2 */ + insn = ppc_inst(PPC_INST_MFSPR | __PPC_RS(R10) | __PPC_SPR(SPRN_SPRG_SCRATCH2)); + mpc8xx_pmu_read(event); /* If it was the last user, stop counting to avoid useles overhead */ @@ -164,22 +169,12 @@ static void mpc8xx_pmu_del(struct perf_event *event, int flags) mtspr(SPRN_ICTRL, 7); break; case PERF_8xx_ID_ITLB_LOAD_MISS: - if (atomic_dec_return(&itlb_miss_ref) == 0) { - /* mfspr r10, SPRN_SPRG_SCRATCH2 */ - struct ppc_inst insn = ppc_inst(PPC_INST_MFSPR | __PPC_RS(R10) | - __PPC_SPR(SPRN_SPRG_SCRATCH2)); - + if (atomic_dec_return(&itlb_miss_ref) == 0) patch_instruction_site(&patch__itlbmiss_exit_1, insn); - } break; case PERF_8xx_ID_DTLB_LOAD_MISS: - if (atomic_dec_return(&dtlb_miss_ref) == 0) { - /* mfspr r10, SPRN_DAR */ - struct ppc_inst insn = ppc_inst(PPC_INST_MFSPR | __PPC_RS(R10) | - __PPC_SPR(SPRN_DAR)); - + if (atomic_dec_return(&dtlb_miss_ref) == 0) patch_instruction_site(&patch__dtlbmiss_exit_1, insn); - } break; } } |