From 94f7b7f021cf38283b4f4d79b35b8fe4b20b89b9 Mon Sep 17 00:00:00 2001 From: Suzuki K Poulose Date: Tue, 8 Nov 2022 14:37:55 +0800 Subject: [PATCH] coresight: ete: Add support for ETE sysreg access mainline inclusion from mainline-v5.12-rc3 commit 3e666ad0f8 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I5YCYK CVE: NA Reference: https://lore.kernel.org/r/20210405164307.1720226-13-suzuki.poulose@arm.com -------------------------------------------------------------------------- Add support for handling the system registers for Embedded Trace Extensions (ETE). ETE shares most of the registers with ETMv4 except for some and also adds some new registers. Re-arrange the ETMv4x list to share the common definitions and add the ETE sysreg support. Cc: Mike Leach Reviewed-by: Mike Leach Signed-off-by: Suzuki K Poulose Link: https://lore.kernel.org/r/20210405164307.1720226-13-suzuki.poulose@arm.com Signed-off-by: Mathieu Poirier --- .../coresight/coresight-etm4x-core.c | 32 +++++++++++ drivers/hwtracing/coresight/coresight-etm4x.h | 54 +++++++++++++++---- 2 files changed, 77 insertions(+), 9 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c index d4b65612cfc7..cfc723bd70a7 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c @@ -97,6 +97,38 @@ void etm4x_sysreg_write(u64 val, u32 offset, bool _relaxed, bool _64bit) } } +static u64 ete_sysreg_read(u32 offset, bool _relaxed, bool _64bit) +{ + u64 res = 0; + + switch (offset) { + ETE_READ_CASES(res) + default : + pr_warn_ratelimited("ete: trying to read unsupported register @%x\n", + offset); + } + + if (!_relaxed) + __iormb(res); /* Imitate the !relaxed I/O helpers */ + + return res; +} + +static void ete_sysreg_write(u64 val, u32 offset, bool _relaxed, bool _64bit) +{ + if (!_relaxed) + __iowmb(); /* Imitate the !relaxed I/O helpers */ + if (!_64bit) + val &= GENMASK(31, 0); + + switch (offset) { + ETE_WRITE_CASES(val) + default : + pr_warn_ratelimited("ete: trying to write to unsupported register @%x\n", + offset); + } +} + static void etm4_os_unlock(struct etmv4_drvdata *drvdata) { /* Writing 0 to TRCOSLAR unlocks the trace registers */ diff --git a/drivers/hwtracing/coresight/coresight-etm4x.h b/drivers/hwtracing/coresight/coresight-etm4x.h index bbf304580bbd..66d6fc0c1e10 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x.h +++ b/drivers/hwtracing/coresight/coresight-etm4x.h @@ -29,6 +29,7 @@ #define TRCAUXCTLR 0x018 #define TRCEVENTCTL0R 0x020 #define TRCEVENTCTL1R 0x024 +#define TRCRSR 0x028 #define TRCSTALLCTLR 0x02C #define TRCTSCTLR 0x030 #define TRCSYNCPR 0x034 @@ -49,6 +50,7 @@ #define TRCSEQRSTEVR 0x118 #define TRCSEQSTR 0x11C #define TRCEXTINSELR 0x120 +#define TRCEXTINSELRn(n) (0x120 + (n * 4)) /* n = 0-3 */ #define TRCCNTRLDVRn(n) (0x140 + (n * 4)) #define TRCCNTCTLRn(n) (0x150 + (n * 4)) #define TRCCNTVRn(n) (0x160 + (n * 4)) @@ -155,10 +157,22 @@ #define CASE_NOP(__unused, x) \ case (x): +#define ETE_ONLY_SYSREG_LIST(op, val) \ + CASE_##op((val), TRCRSR) \ + CASE_##op((val), TRCEXTINSELRn(1)) \ + CASE_##op((val), TRCEXTINSELRn(2)) \ + CASE_##op((val), TRCEXTINSELRn(3)) + /* List of registers accessible via System instructions */ -#define ETM_SYSREG_LIST(op, val) \ - CASE_##op((val), TRCPRGCTLR) \ +#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) \ + CASE_##op((val), TRCPRGCTLR) \ CASE_##op((val), TRCSTATR) \ CASE_##op((val), TRCCONFIGR) \ CASE_##op((val), TRCAUXCTLR) \ @@ -175,9 +189,6 @@ CASE_##op((val), TRCVIIECTLR) \ CASE_##op((val), TRCVISSCTLR) \ CASE_##op((val), TRCVIPCSSCTLR) \ - CASE_##op((val), TRCVDCTLR) \ - CASE_##op((val), TRCVDSACCTLR) \ - CASE_##op((val), TRCVDARCCTLR) \ CASE_##op((val), TRCSEQEVRn(0)) \ CASE_##op((val), TRCSEQEVRn(1)) \ CASE_##op((val), TRCSEQEVRn(2)) \ @@ -272,7 +283,6 @@ CASE_##op((val), TRCSSPCICRn(5)) \ CASE_##op((val), TRCSSPCICRn(6)) \ CASE_##op((val), TRCSSPCICRn(7)) \ - CASE_##op((val), TRCOSLAR) \ CASE_##op((val), TRCOSLSR) \ CASE_##op((val), TRCACVRn(0)) \ CASE_##op((val), TRCACVRn(1)) \ @@ -364,12 +374,38 @@ CASE_##op((val), TRCPIDR2) \ CASE_##op((val), TRCPIDR3) -#define ETM4x_READ_SYSREG_CASES(res) ETM_SYSREG_LIST(READ, (res)) -#define ETM4x_WRITE_SYSREG_CASES(val) ETM_SYSREG_LIST(WRITE, (val)) +#define ETM4x_READ_SYSREG_CASES(res) \ + ETM_COMMON_SYSREG_LIST(READ, (res)) \ + ETM4x_ONLY_SYSREG_LIST(READ, (res)) + +#define ETM4x_WRITE_SYSREG_CASES(val) \ + ETM_COMMON_SYSREG_LIST(WRITE, (val)) \ + ETM4x_ONLY_SYSREG_LIST(WRITE, (val)) + +#define ETM_COMMON_SYSREG_LIST_CASES \ + ETM_COMMON_SYSREG_LIST(NOP, __unused) + +#define ETM4x_ONLY_SYSREG_LIST_CASES \ + ETM4x_ONLY_SYSREG_LIST(NOP, __unused) + +#define ETM4x_SYSREG_LIST_CASES \ + ETM_COMMON_SYSREG_LIST_CASES \ + ETM4x_ONLY_SYSREG_LIST(NOP, __unused) -#define ETM4x_SYSREG_LIST_CASES ETM_SYSREG_LIST(NOP, __unused) #define ETM4x_MMAP_LIST_CASES ETM_MMAP_LIST(NOP, __unused) +/* ETE only supports system register access */ +#define ETE_READ_CASES(res) \ + ETM_COMMON_SYSREG_LIST(READ, (res)) \ + ETE_ONLY_SYSREG_LIST(READ, (res)) + +#define ETE_WRITE_CASES(val) \ + ETM_COMMON_SYSREG_LIST(WRITE, (val)) \ + ETE_ONLY_SYSREG_LIST(WRITE, (val)) + +#define ETE_ONLY_SYSREG_LIST_CASES \ + ETE_ONLY_SYSREG_LIST(NOP, __unused) + #define read_etm4x_sysreg_offset(offset, _64bit) \ ({ \ u64 __val; \ -- GitLab