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| author | Wei Huang <wei@redhat.com> | 2017-02-10 17:40:28 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2017-02-10 17:40:28 +0000 |
| commit | fdb8665672ded05f650d18f8b62d5c8524b4385b (patch) | |
| tree | 133faa75882fee6ca77cb4b0ad1b1b1b1aa58dff /target/arm/helper.c | |
| parent | 6b0407805d46bbeba70f4be426285d0a0e669750 (diff) | |
| download | focaccia-qemu-fdb8665672ded05f650d18f8b62d5c8524b4385b.tar.gz focaccia-qemu-fdb8665672ded05f650d18f8b62d5c8524b4385b.zip | |
target-arm: Add support for AArch64 PMU register PMXEVTYPER_EL0
In order to support Linux perf, which uses PMXEVTYPER register, this patch adds read/write access support for PMXEVTYPER. The access is CONSTRAINED UNPREDICTABLE when PMSELR is not 0x1f. Additionally this patch adds support for PMXEVTYPER_EL0. Signed-off-by: Wei Huang <wei@redhat.com> Message-id: 1486504171-26807-3-git-send-email-wei@redhat.com Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target/arm/helper.c')
| -rw-r--r-- | target/arm/helper.c | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/target/arm/helper.c b/target/arm/helper.c index 42803d41e2..b837d36bde 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -1054,7 +1054,25 @@ static void pmovsr_write(CPUARMState *env, const ARMCPRegInfo *ri, static void pmxevtyper_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) { - env->cp15.c9_pmxevtyper = value & 0xff; + /* Attempts to access PMXEVTYPER are CONSTRAINED UNPREDICTABLE when + * PMSELR value is equal to or greater than the number of implemented + * counters, but not equal to 0x1f. We opt to behave as a RAZ/WI. + */ + if (env->cp15.c9_pmselr == 0x1f) { + pmccfiltr_write(env, ri, value); + } +} + +static uint64_t pmxevtyper_read(CPUARMState *env, const ARMCPRegInfo *ri) +{ + /* We opt to behave as a RAZ/WI when attempts to access PMXEVTYPER + * are CONSTRAINED UNPREDICTABLE. See comments in pmxevtyper_write(). + */ + if (env->cp15.c9_pmselr == 0x1f) { + return env->cp15.pmccfiltr_el0; + } else { + return 0; + } } static void pmuserenr_write(CPUARMState *env, const ARMCPRegInfo *ri, @@ -1234,10 +1252,12 @@ static const ARMCPRegInfo v7_cp_reginfo[] = { .fieldoffset = offsetof(CPUARMState, cp15.pmccfiltr_el0), .resetvalue = 0, }, { .name = "PMXEVTYPER", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 1, - .access = PL0_RW, - .fieldoffset = offsetof(CPUARMState, cp15.c9_pmxevtyper), - .accessfn = pmreg_access, .writefn = pmxevtyper_write, - .raw_writefn = raw_write }, + .access = PL0_RW, .type = ARM_CP_NO_RAW, .accessfn = pmreg_access, + .writefn = pmxevtyper_write, .readfn = pmxevtyper_read }, + { .name = "PMXEVTYPER_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .crn = 9, .crm = 13, .opc2 = 1, + .access = PL0_RW, .type = ARM_CP_NO_RAW, .accessfn = pmreg_access, + .writefn = pmxevtyper_write, .readfn = pmxevtyper_read }, /* Unimplemented, RAZ/WI. */ { .name = "PMXEVCNTR", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 2, .access = PL0_RW, .type = ARM_CP_CONST, .resetvalue = 0, |