diff options
author | Max Krummenacher <max.krummenacher@toradex.com> | 2020-07-07 14:39:39 +0200 |
---|---|---|
committer | Max Krummenacher <max.krummenacher@toradex.com> | 2020-07-07 18:42:28 +0200 |
commit | bb02de12d4adbd463837a57556fe6a4a29535e29 (patch) | |
tree | 83674f672af49651fe39c7d7eee52ae513ea4107 /arch/arm64/kernel | |
parent | babac008e5cf168abca1a85bda2e8071ca27a5c0 (diff) | |
parent | fd8cd8ac940c8b45b75474415291a3b941c865ab (diff) |
Merge tag 'v5.4.47' into 5.4-2.1.x-imx
This is the 5.4.47 stable release
All conflicts resolved in favour of HEAD, i.e. 5.4-2.1.x-imx
Conflicts:
arch/arm/boot/dts/imx6qdl.dtsi
arch/arm/mach-imx/Kconfig
arch/arm/mach-imx/common.h
arch/arm/mach-imx/suspend-imx6.S
arch/arm64/boot/dts/freescale/imx8qxp-mek.dts
arch/powerpc/include/asm/cacheflush.h
drivers/cpufreq/imx6q-cpufreq.c
drivers/dma/imx-sdma.c
drivers/edac/synopsys_edac.c
drivers/firmware/imx/imx-scu.c
drivers/net/ethernet/freescale/fec.h
drivers/net/ethernet/freescale/fec_main.c
drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
drivers/net/phy/phy_device.c
drivers/perf/fsl_imx8_ddr_perf.c
drivers/usb/cdns3/gadget.c
drivers/usb/dwc3/gadget.c
include/uapi/linux/dma-buf.h
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Diffstat (limited to 'arch/arm64/kernel')
-rw-r--r-- | arch/arm64/kernel/armv8_deprecated.c | 2 | ||||
-rw-r--r-- | arch/arm64/kernel/cpu_errata.c | 32 | ||||
-rw-r--r-- | arch/arm64/kernel/machine_kexec.c | 1 | ||||
-rw-r--r-- | arch/arm64/kernel/ptrace.c | 7 | ||||
-rw-r--r-- | arch/arm64/kernel/smp.c | 25 | ||||
-rw-r--r-- | arch/arm64/kernel/sys_compat.c | 11 | ||||
-rw-r--r-- | arch/arm64/kernel/traps.c | 9 | ||||
-rw-r--r-- | arch/arm64/kernel/vdso.c | 13 | ||||
-rw-r--r-- | arch/arm64/kernel/vdso/Makefile | 2 |
9 files changed, 79 insertions, 23 deletions
diff --git a/arch/arm64/kernel/armv8_deprecated.c b/arch/arm64/kernel/armv8_deprecated.c index ca158be21f83..bcb14d11232f 100644 --- a/arch/arm64/kernel/armv8_deprecated.c +++ b/arch/arm64/kernel/armv8_deprecated.c @@ -601,7 +601,7 @@ static struct undef_hook setend_hooks[] = { }, { /* Thumb mode */ - .instr_mask = 0x0000fff7, + .instr_mask = 0xfffffff7, .instr_val = 0x0000b650, .pstate_mask = (PSR_AA32_T_BIT | PSR_AA32_MODE_MASK), .pstate_val = (PSR_AA32_T_BIT | PSR_AA32_MODE_USR), diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c index 96f576e9ea46..0b2830379fe0 100644 --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -88,13 +88,21 @@ has_mismatched_cache_type(const struct arm64_cpu_capabilities *entry, } static void -cpu_enable_trap_ctr_access(const struct arm64_cpu_capabilities *__unused) +cpu_enable_trap_ctr_access(const struct arm64_cpu_capabilities *cap) { u64 mask = arm64_ftr_reg_ctrel0.strict_mask; + bool enable_uct_trap = false; /* Trap CTR_EL0 access on this CPU, only if it has a mismatch */ if ((read_cpuid_cachetype() & mask) != (arm64_ftr_reg_ctrel0.sys_val & mask)) + enable_uct_trap = true; + + /* ... or if the system is affected by an erratum */ + if (cap->capability == ARM64_WORKAROUND_1542419) + enable_uct_trap = true; + + if (enable_uct_trap) sysreg_clear_set(sctlr_el1, SCTLR_EL1_UCT, 0); } @@ -651,6 +659,18 @@ needs_tx2_tvm_workaround(const struct arm64_cpu_capabilities *entry, return false; } +static bool __maybe_unused +has_neoverse_n1_erratum_1542419(const struct arm64_cpu_capabilities *entry, + int scope) +{ + u32 midr = read_cpuid_id(); + bool has_dic = read_cpuid_cachetype() & BIT(CTR_DIC_SHIFT); + const struct midr_range range = MIDR_ALL_VERSIONS(MIDR_NEOVERSE_N1); + + WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible()); + return is_midr_in_range(midr, &range) && has_dic; +} + #ifdef CONFIG_HARDEN_EL2_VECTORS static const struct midr_range arm64_harden_el2_vectors[] = { @@ -928,6 +948,16 @@ const struct arm64_cpu_capabilities arm64_errata[] = { ERRATA_MIDR_RANGE_LIST(tx2_family_cpus), }, #endif +#ifdef CONFIG_ARM64_ERRATUM_1542419 + { + /* we depend on the firmware portion for correctness */ + .desc = "ARM erratum 1542419 (kernel portion)", + .capability = ARM64_WORKAROUND_1542419, + .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, + .matches = has_neoverse_n1_erratum_1542419, + .cpu_enable = cpu_enable_trap_ctr_access, + }, +#endif { } }; diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c index 0df8493624e0..cc049ff5c6a5 100644 --- a/arch/arm64/kernel/machine_kexec.c +++ b/arch/arm64/kernel/machine_kexec.c @@ -189,6 +189,7 @@ void machine_kexec(struct kimage *kimage) * the offline CPUs. Therefore, we must use the __* variant here. */ __flush_icache_range((uintptr_t)reboot_code_buffer, + (uintptr_t)reboot_code_buffer + arm64_relocate_new_kernel_size); /* Flush the kimage list and its buffers. */ diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c index 9168c4f1a37f..8d2d9d5b418f 100644 --- a/arch/arm64/kernel/ptrace.c +++ b/arch/arm64/kernel/ptrace.c @@ -1829,10 +1829,11 @@ static void tracehook_report_syscall(struct pt_regs *regs, int syscall_trace_enter(struct pt_regs *regs) { - if (test_thread_flag(TIF_SYSCALL_TRACE) || - test_thread_flag(TIF_SYSCALL_EMU)) { + unsigned long flags = READ_ONCE(current_thread_info()->flags); + + if (flags & (_TIF_SYSCALL_EMU | _TIF_SYSCALL_TRACE)) { tracehook_report_syscall(regs, PTRACE_SYSCALL_ENTER); - if (!in_syscall(regs) || test_thread_flag(TIF_SYSCALL_EMU)) + if (!in_syscall(regs) || (flags & _TIF_SYSCALL_EMU)) return -1; } diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index dc9fe879c279..993a4aedfd37 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -955,11 +955,22 @@ void tick_broadcast(const struct cpumask *mask) } #endif +/* + * The number of CPUs online, not counting this CPU (which may not be + * fully online and so not counted in num_online_cpus()). + */ +static inline unsigned int num_other_online_cpus(void) +{ + unsigned int this_cpu_online = cpu_online(smp_processor_id()); + + return num_online_cpus() - this_cpu_online; +} + void smp_send_stop(void) { unsigned long timeout; - if (num_online_cpus() > 1) { + if (num_other_online_cpus()) { cpumask_t mask; cpumask_copy(&mask, cpu_online_mask); @@ -972,10 +983,10 @@ void smp_send_stop(void) /* Wait up to one second for other CPUs to stop */ timeout = USEC_PER_SEC; - while (num_online_cpus() > 1 && timeout--) + while (num_other_online_cpus() && timeout--) udelay(1); - if (num_online_cpus() > 1) + if (num_other_online_cpus()) pr_warning("SMP: failed to stop secondary CPUs %*pbl\n", cpumask_pr_args(cpu_online_mask)); @@ -998,7 +1009,11 @@ void crash_smp_send_stop(void) cpus_stopped = 1; - if (num_online_cpus() == 1) { + /* + * If this cpu is the only one alive at this point in time, online or + * not, there are no stop messages to be sent around, so just back out. + */ + if (num_other_online_cpus() == 0) { sdei_mask_local_cpu(); return; } @@ -1006,7 +1021,7 @@ void crash_smp_send_stop(void) cpumask_copy(&mask, cpu_online_mask); cpumask_clear_cpu(smp_processor_id(), &mask); - atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1); + atomic_set(&waiting_for_crash_ipi, num_other_online_cpus()); pr_crit("SMP: stopping secondary CPUs\n"); smp_cross_call(&mask, IPI_CPU_CRASH_STOP); diff --git a/arch/arm64/kernel/sys_compat.c b/arch/arm64/kernel/sys_compat.c index f1cb64959427..3c18c2454089 100644 --- a/arch/arm64/kernel/sys_compat.c +++ b/arch/arm64/kernel/sys_compat.c @@ -8,6 +8,7 @@ */ #include <linux/compat.h> +#include <linux/cpufeature.h> #include <linux/personality.h> #include <linux/sched.h> #include <linux/sched/signal.h> @@ -17,6 +18,7 @@ #include <asm/cacheflush.h> #include <asm/system_misc.h> +#include <asm/tlbflush.h> #include <asm/unistd.h> static long @@ -30,6 +32,15 @@ __do_compat_cache_op(unsigned long start, unsigned long end) if (fatal_signal_pending(current)) return 0; + if (cpus_have_const_cap(ARM64_WORKAROUND_1542419)) { + /* + * The workaround requires an inner-shareable tlbi. + * We pick the reserved-ASID to minimise the impact. + */ + __tlbi(aside1is, __TLBI_VADDR(0, 0)); + dsb(ish); + } + ret = __flush_cache_user_range(start, start + chunk); if (ret) return ret; diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index 7d31ce7d7562..ace993b5664c 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -501,6 +501,15 @@ static void ctr_read_handler(unsigned int esr, struct pt_regs *regs) int rt = ESR_ELx_SYS64_ISS_RT(esr); unsigned long val = arm64_ftr_reg_user_value(&arm64_ftr_reg_ctrel0); + if (cpus_have_const_cap(ARM64_WORKAROUND_1542419)) { + /* Hide DIC so that we can trap the unnecessary maintenance...*/ + val &= ~BIT(CTR_DIC_SHIFT); + + /* ... and fake IminLine to reduce the number of traps. */ + val &= ~CTR_IMINLINE_MASK; + val |= (PAGE_SHIFT - 2) & CTR_IMINLINE_MASK; + } + pt_regs_write_reg(regs, rt, val); arm64_skip_faulting_instruction(regs, AARCH64_INSN_SIZE); diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c index 354b11e27c07..033a48f30dbb 100644 --- a/arch/arm64/kernel/vdso.c +++ b/arch/arm64/kernel/vdso.c @@ -260,18 +260,7 @@ static int __aarch32_alloc_vdso_pages(void) if (ret) return ret; - ret = aarch32_alloc_kuser_vdso_page(); - if (ret) { - unsigned long c_vvar = - (unsigned long)page_to_virt(aarch32_vdso_pages[C_VVAR]); - unsigned long c_vdso = - (unsigned long)page_to_virt(aarch32_vdso_pages[C_VDSO]); - - free_page(c_vvar); - free_page(c_vdso); - } - - return ret; + return aarch32_alloc_kuser_vdso_page(); } #else static int __aarch32_alloc_vdso_pages(void) diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile index dd2514bb1511..3862cad2410c 100644 --- a/arch/arm64/kernel/vdso/Makefile +++ b/arch/arm64/kernel/vdso/Makefile @@ -32,7 +32,7 @@ UBSAN_SANITIZE := n OBJECT_FILES_NON_STANDARD := y KCOV_INSTRUMENT := n -CFLAGS_vgettimeofday.o = -O2 -mcmodel=tiny +CFLAGS_vgettimeofday.o = -O2 -mcmodel=tiny -fasynchronous-unwind-tables ifneq ($(c-gettimeofday-y),) CFLAGS_vgettimeofday.o += -include $(c-gettimeofday-y) |