6.6-stable review patch. If anyone has any objections, please let me know.
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From: Suzuki K Poulose suzuki.poulose@arm.com
[ Upstream commit 5eb3a0c2c52368cb9902e9a6ea04888e093c487d ]
ETM4x doesn't support Data trace on A class CPUs. As such do not access the Data trace control registers during CPU idle. This could cause problems for ETE. While at it, remove all references to the Data trace control registers.
Fixes: f188b5e76aae ("coresight: etm4x: Save/restore state across CPU low power states") Reported-by: Yabin Cui yabinc@google.com Reviewed-by: Mike Leach mike.leach@linaro.org Signed-off-by: Suzuki K Poulose suzuki.poulose@arm.com Tested-by: Yabin Cui yabinc@google.com Link: https://lore.kernel.org/r/20240412142702.2882478-3-suzuki.poulose@arm.com Signed-off-by: Sasha Levin sashal@kernel.org --- .../coresight/coresight-etm4x-core.c | 6 ---- drivers/hwtracing/coresight/coresight-etm4x.h | 28 ------------------- 2 files changed, 34 deletions(-)
diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c index ad866e29020e3..98895bd918ea5 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c @@ -1701,9 +1701,6 @@ static int __etm4_cpu_save(struct etmv4_drvdata *drvdata) state->trcvissctlr = etm4x_read32(csa, TRCVISSCTLR); if (drvdata->nr_pe_cmp) state->trcvipcssctlr = etm4x_read32(csa, TRCVIPCSSCTLR); - state->trcvdctlr = etm4x_read32(csa, TRCVDCTLR); - state->trcvdsacctlr = etm4x_read32(csa, TRCVDSACCTLR); - state->trcvdarcctlr = etm4x_read32(csa, TRCVDARCCTLR);
for (i = 0; i < drvdata->nrseqstate - 1; i++) state->trcseqevr[i] = etm4x_read32(csa, TRCSEQEVRn(i)); @@ -1834,9 +1831,6 @@ static void __etm4_cpu_restore(struct etmv4_drvdata *drvdata) etm4x_relaxed_write32(csa, state->trcvissctlr, TRCVISSCTLR); if (drvdata->nr_pe_cmp) etm4x_relaxed_write32(csa, state->trcvipcssctlr, TRCVIPCSSCTLR); - etm4x_relaxed_write32(csa, state->trcvdctlr, TRCVDCTLR); - etm4x_relaxed_write32(csa, state->trcvdsacctlr, TRCVDSACCTLR); - etm4x_relaxed_write32(csa, state->trcvdarcctlr, TRCVDARCCTLR);
for (i = 0; i < drvdata->nrseqstate - 1; i++) etm4x_relaxed_write32(csa, state->trcseqevr[i], TRCSEQEVRn(i)); diff --git a/drivers/hwtracing/coresight/coresight-etm4x.h b/drivers/hwtracing/coresight/coresight-etm4x.h index da17b6c49b0f1..574dbaef50836 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x.h +++ b/drivers/hwtracing/coresight/coresight-etm4x.h @@ -43,9 +43,6 @@ #define TRCVIIECTLR 0x084 #define TRCVISSCTLR 0x088 #define TRCVIPCSSCTLR 0x08C -#define TRCVDCTLR 0x0A0 -#define TRCVDSACCTLR 0x0A4 -#define TRCVDARCCTLR 0x0A8 /* Derived resources registers */ #define TRCSEQEVRn(n) (0x100 + (n * 4)) /* n = 0-2 */ #define TRCSEQRSTEVR 0x118 @@ -90,9 +87,6 @@ /* Address Comparator registers n = 0-15 */ #define TRCACVRn(n) (0x400 + (n * 8)) #define TRCACATRn(n) (0x480 + (n * 8)) -/* Data Value Comparator Value registers, n = 0-7 */ -#define TRCDVCVRn(n) (0x500 + (n * 16)) -#define TRCDVCMRn(n) (0x580 + (n * 16)) /* ContextID/Virtual ContextID comparators, n = 0-7 */ #define TRCCIDCVRn(n) (0x600 + (n * 8)) #define TRCVMIDCVRn(n) (0x640 + (n * 8)) @@ -272,9 +266,6 @@ /* List of registers accessible via System instructions */ #define ETM4x_ONLY_SYSREG_LIST(op, val) \ CASE_##op((val), TRCPROCSELR) \ - CASE_##op((val), TRCVDCTLR) \ - CASE_##op((val), TRCVDSACCTLR) \ - CASE_##op((val), TRCVDARCCTLR) \ CASE_##op((val), TRCOSLAR)
#define ETM_COMMON_SYSREG_LIST(op, val) \ @@ -422,22 +413,6 @@ CASE_##op((val), TRCACATRn(13)) \ CASE_##op((val), TRCACATRn(14)) \ CASE_##op((val), TRCACATRn(15)) \ - CASE_##op((val), TRCDVCVRn(0)) \ - CASE_##op((val), TRCDVCVRn(1)) \ - CASE_##op((val), TRCDVCVRn(2)) \ - CASE_##op((val), TRCDVCVRn(3)) \ - CASE_##op((val), TRCDVCVRn(4)) \ - CASE_##op((val), TRCDVCVRn(5)) \ - CASE_##op((val), TRCDVCVRn(6)) \ - CASE_##op((val), TRCDVCVRn(7)) \ - CASE_##op((val), TRCDVCMRn(0)) \ - CASE_##op((val), TRCDVCMRn(1)) \ - CASE_##op((val), TRCDVCMRn(2)) \ - CASE_##op((val), TRCDVCMRn(3)) \ - CASE_##op((val), TRCDVCMRn(4)) \ - CASE_##op((val), TRCDVCMRn(5)) \ - CASE_##op((val), TRCDVCMRn(6)) \ - CASE_##op((val), TRCDVCMRn(7)) \ CASE_##op((val), TRCCIDCVRn(0)) \ CASE_##op((val), TRCCIDCVRn(1)) \ CASE_##op((val), TRCCIDCVRn(2)) \ @@ -907,9 +882,6 @@ struct etmv4_save_state { u32 trcviiectlr; u32 trcvissctlr; u32 trcvipcssctlr; - u32 trcvdctlr; - u32 trcvdsacctlr; - u32 trcvdarcctlr;
u32 trcseqevr[ETM_MAX_SEQ_STATES]; u32 trcseqrstevr;