diff options
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/entry.S | 3 | ||||
| -rw-r--r-- | arch/arm64/kernel/fpsimd.c | 28 | ||||
| -rw-r--r-- | arch/arm64/kernel/head.S | 8 | ||||
| -rw-r--r-- | arch/arm64/kernel/perf_event.c | 7 | ||||
| -rw-r--r-- | arch/arm64/kernel/setup.c | 3 | ||||
| -rw-r--r-- | arch/arm64/kernel/smp.c | 6 | ||||
| -rw-r--r-- | arch/arm64/kernel/vmlinux.lds.S | 3 |
7 files changed, 46 insertions, 12 deletions
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index 6ad781b21c08..3881fd115ebb 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -423,6 +423,7 @@ el0_da: * Data abort handling */ mrs x0, far_el1 + bic x0, x0, #(0xff << 56) disable_step x1 isb enable_dbg @@ -476,6 +477,8 @@ el0_undef: * Undefined instruction */ mov x0, sp + // enable interrupts before calling the main handler + enable_irq b do_undefinstr el0_dbg: /* diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c index e8b8357aedb4..1f2e4d5a5c0f 100644 --- a/arch/arm64/kernel/fpsimd.c +++ b/arch/arm64/kernel/fpsimd.c @@ -21,6 +21,7 @@ #include <linux/init.h> #include <linux/sched.h> #include <linux/signal.h> +#include <linux/hardirq.h> #include <asm/fpsimd.h> #include <asm/cputype.h> @@ -83,6 +84,33 @@ void fpsimd_flush_thread(void) fpsimd_load_state(¤t->thread.fpsimd_state); } +#ifdef CONFIG_KERNEL_MODE_NEON + +/* + * Kernel-side NEON support functions + */ +void kernel_neon_begin(void) +{ + /* Avoid using the NEON in interrupt context */ + BUG_ON(in_interrupt()); + preempt_disable(); + + if (current->mm) + fpsimd_save_state(¤t->thread.fpsimd_state); +} +EXPORT_SYMBOL(kernel_neon_begin); + +void kernel_neon_end(void) +{ + if (current->mm) + fpsimd_load_state(¤t->thread.fpsimd_state); + + preempt_enable(); +} +EXPORT_SYMBOL(kernel_neon_end); + +#endif /* CONFIG_KERNEL_MODE_NEON */ + /* * FP/SIMD support code initialisation. */ diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S index 53dcae49e729..7090c126797c 100644 --- a/arch/arm64/kernel/head.S +++ b/arch/arm64/kernel/head.S @@ -112,6 +112,14 @@ .quad TEXT_OFFSET // Image load offset from start of RAM .quad 0 // reserved .quad 0 // reserved + .quad 0 // reserved + .quad 0 // reserved + .quad 0 // reserved + .byte 0x41 // Magic number, "ARM\x64" + .byte 0x52 + .byte 0x4d + .byte 0x64 + .word 0 // reserved ENTRY(stext) mov x21, x0 // x21=FDT diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c index 12e6ccb88691..cea1594ff933 100644 --- a/arch/arm64/kernel/perf_event.c +++ b/arch/arm64/kernel/perf_event.c @@ -325,7 +325,10 @@ validate_event(struct pmu_hw_events *hw_events, if (is_software_event(event)) return 1; - if (event->pmu != leader_pmu || event->state <= PERF_EVENT_STATE_OFF) + if (event->pmu != leader_pmu || event->state < PERF_EVENT_STATE_OFF) + return 1; + + if (event->state == PERF_EVENT_STATE_OFF && !event->attr.enable_on_exec) return 1; return armpmu->get_event_idx(hw_events, &fake_event) >= 0; @@ -781,7 +784,7 @@ static const unsigned armv8_pmuv3_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] /* * PMXEVTYPER: Event selection reg */ -#define ARMV8_EVTYPE_MASK 0xc00000ff /* Mask for writable bits */ +#define ARMV8_EVTYPE_MASK 0xc80000ff /* Mask for writable bits */ #define ARMV8_EVTYPE_EVENT 0xff /* Mask for EVENT bits */ /* diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index 0f9856a2afa4..12ad8f3d0cfd 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -323,9 +323,6 @@ static int c_show(struct seq_file *m, void *v) #ifdef CONFIG_SMP seq_printf(m, "processor\t: %d\n", i); #endif - seq_printf(m, "BogoMIPS\t: %lu.%02lu\n\n", - loops_per_jiffy / (500000UL/HZ), - loops_per_jiffy / (5000UL/HZ) % 100); } /* dump out the processor features */ diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index fee5cce83450..78db90dcc910 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -223,11 +223,7 @@ asmlinkage void secondary_start_kernel(void) void __init smp_cpus_done(unsigned int max_cpus) { - unsigned long bogosum = loops_per_jiffy * num_online_cpus(); - - pr_info("SMP: Total of %d processors activated (%lu.%02lu BogoMIPS).\n", - num_online_cpus(), bogosum / (500000/HZ), - (bogosum / (5000/HZ)) % 100); + pr_info("SMP: Total of %d processors activated.\n", num_online_cpus()); } void __init smp_prepare_boot_cpu(void) diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S index f5e55747242f..f8ab9d8e2ea3 100644 --- a/arch/arm64/kernel/vmlinux.lds.S +++ b/arch/arm64/kernel/vmlinux.lds.S @@ -71,6 +71,7 @@ SECTIONS RO_DATA(PAGE_SIZE) EXCEPTION_TABLE(8) + NOTES _etext = .; /* End of text and rodata section */ . = ALIGN(PAGE_SIZE); @@ -122,8 +123,6 @@ SECTIONS } _edata_loc = __data_loc + SIZEOF(.data); - NOTES - BSS_SECTION(0, 0, 0) _end = .; |