diff options
| author | Will Deacon <will.deacon@arm.com> | 2019-05-01 15:45:36 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2019-05-01 15:45:36 +0100 |
| commit | 24cf262da1ad303fc940c798aab0bd1bd50e3fc2 (patch) | |
| tree | da38a3ae51128dfb959fb53d633201ab4ffb4209 /arch/arm64/kernel | |
| parent | 50abbe19623e08e2aa34e0e526bd6115569f3dc3 (diff) | |
| parent | 0ea415390cd345b7d09e8c9ebd4b68adfe873043 (diff) | |
| download | linux-24cf262da1ad303fc940c798aab0bd1bd50e3fc2.tar.bz2 | |
Merge branch 'for-next/timers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux into for-next/core
Conflicts:
arch/arm64/Kconfig
arch/arm64/include/asm/arch_timer.h
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/cpu_errata.c | 13 | ||||
| -rw-r--r-- | arch/arm64/kernel/entry.S | 19 | ||||
| -rw-r--r-- | arch/arm64/kernel/traps.c | 4 |
3 files changed, 30 insertions, 6 deletions
diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c index 1b9ce0fdd81d..e88d4e7bdfc7 100644 --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -682,6 +682,16 @@ static const struct midr_range workaround_clean_cache[] = { }; #endif +#ifdef CONFIG_ARM64_ERRATUM_1188873 +static const struct midr_range erratum_1188873_list[] = { + /* Cortex-A76 r0p0 to r2p0 */ + MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 2, 0), + /* Neoverse-N1 r0p0 to r2p0 */ + MIDR_RANGE(MIDR_NEOVERSE_N1, 0, 0, 2, 0), + {}, +}; +#endif + const struct arm64_cpu_capabilities arm64_errata[] = { #ifdef CONFIG_ARM64_WORKAROUND_CLEAN_CACHE { @@ -801,10 +811,9 @@ const struct arm64_cpu_capabilities arm64_errata[] = { }, #ifdef CONFIG_ARM64_ERRATUM_1188873 { - /* Cortex-A76 r0p0 to r2p0 */ .desc = "ARM erratum 1188873", .capability = ARM64_WORKAROUND_1188873, - ERRATA_MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 2, 0), + ERRATA_MIDR_RANGE_LIST(erratum_1188873_list), }, #endif #ifdef CONFIG_ARM64_ERRATUM_1165522 diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index c50a7a75f2e0..1a7811b7e3c4 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -336,6 +336,21 @@ alternative_if ARM64_WORKAROUND_845719 alternative_else_nop_endif #endif 3: +#ifdef CONFIG_ARM64_ERRATUM_1188873 +alternative_if_not ARM64_WORKAROUND_1188873 + b 4f +alternative_else_nop_endif + /* + * if (x22.mode32 == cntkctl_el1.el0vcten) + * cntkctl_el1.el0vcten = ~cntkctl_el1.el0vcten + */ + mrs x1, cntkctl_el1 + eon x0, x1, x22, lsr #3 + tbz x0, #1, 4f + eor x1, x1, #2 // ARCH_TIMER_USR_VCT_ACCESS_EN + msr cntkctl_el1, x1 +4: +#endif apply_ssbd 0, x0, x1 .endif @@ -362,11 +377,11 @@ alternative_else_nop_endif .if \el == 0 alternative_insn eret, nop, ARM64_UNMAP_KERNEL_AT_EL0 #ifdef CONFIG_UNMAP_KERNEL_AT_EL0 - bne 4f + bne 5f msr far_el1, x30 tramp_alias x30, tramp_exit_native br x30 -4: +5: tramp_alias x30, tramp_exit_compat br x30 #endif diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index 21e73954762c..48432027969c 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -496,7 +496,7 @@ static void cntvct_read_handler(unsigned int esr, struct pt_regs *regs) { int rt = ESR_ELx_SYS64_ISS_RT(esr); - pt_regs_write_reg(regs, rt, arch_counter_get_cntvct()); + pt_regs_write_reg(regs, rt, arch_timer_read_counter()); arm64_skip_faulting_instruction(regs, AARCH64_INSN_SIZE); } @@ -668,7 +668,7 @@ static void compat_cntvct_read_handler(unsigned int esr, struct pt_regs *regs) { int rt = (esr & ESR_ELx_CP15_64_ISS_RT_MASK) >> ESR_ELx_CP15_64_ISS_RT_SHIFT; int rt2 = (esr & ESR_ELx_CP15_64_ISS_RT2_MASK) >> ESR_ELx_CP15_64_ISS_RT2_SHIFT; - u64 val = arch_counter_get_cntvct(); + u64 val = arch_timer_read_counter(); pt_regs_write_reg(regs, rt, lower_32_bits(val)); pt_regs_write_reg(regs, rt2, upper_32_bits(val)); |