diff options
Diffstat (limited to 'arch/arm/kernel')
| -rw-r--r-- | arch/arm/kernel/cpuidle.c | 6 | ||||
| -rw-r--r-- | arch/arm/kernel/efi.c | 41 | ||||
| -rw-r--r-- | arch/arm/kernel/hw_breakpoint.c | 4 | ||||
| -rw-r--r-- | arch/arm/kernel/perf_callchain.c | 2 | ||||
| -rw-r--r-- | arch/arm/kernel/setup.c | 3 |
5 files changed, 49 insertions, 7 deletions
diff --git a/arch/arm/kernel/cpuidle.c b/arch/arm/kernel/cpuidle.c index 703926e7007b..a44b268e12e1 100644 --- a/arch/arm/kernel/cpuidle.c +++ b/arch/arm/kernel/cpuidle.c @@ -70,7 +70,7 @@ int arm_cpuidle_suspend(int index) * * Returns a struct cpuidle_ops pointer, NULL if not found. */ -static struct cpuidle_ops *__init arm_cpuidle_get_ops(const char *method) +static const struct cpuidle_ops *__init arm_cpuidle_get_ops(const char *method) { struct of_cpuidle_method *m = __cpuidle_method_of_table; @@ -88,7 +88,7 @@ static struct cpuidle_ops *__init arm_cpuidle_get_ops(const char *method) * * Get the method name defined in the 'enable-method' property, retrieve the * associated cpuidle_ops and do a struct copy. This copy is needed because all - * cpuidle_ops are tagged __initdata and will be unloaded after the init + * cpuidle_ops are tagged __initconst and will be unloaded after the init * process. * * Return 0 on sucess, -ENOENT if no 'enable-method' is defined, -EOPNOTSUPP if @@ -97,7 +97,7 @@ static struct cpuidle_ops *__init arm_cpuidle_get_ops(const char *method) static int __init arm_cpuidle_read_ops(struct device_node *dn, int cpu) { const char *enable_method; - struct cpuidle_ops *ops; + const struct cpuidle_ops *ops; enable_method = of_get_property(dn, "enable-method", NULL); if (!enable_method) diff --git a/arch/arm/kernel/efi.c b/arch/arm/kernel/efi.c index ff8a9d8acfac..9f43ba012d10 100644 --- a/arch/arm/kernel/efi.c +++ b/arch/arm/kernel/efi.c @@ -11,6 +11,41 @@ #include <asm/mach/map.h> #include <asm/mmu_context.h> +static int __init set_permissions(pte_t *ptep, pgtable_t token, + unsigned long addr, void *data) +{ + efi_memory_desc_t *md = data; + pte_t pte = *ptep; + + if (md->attribute & EFI_MEMORY_RO) + pte = set_pte_bit(pte, __pgprot(L_PTE_RDONLY)); + if (md->attribute & EFI_MEMORY_XP) + pte = set_pte_bit(pte, __pgprot(L_PTE_XN)); + set_pte_ext(ptep, pte, PTE_EXT_NG); + return 0; +} + +int __init efi_set_mapping_permissions(struct mm_struct *mm, + efi_memory_desc_t *md) +{ + unsigned long base, size; + + base = md->virt_addr; + size = md->num_pages << EFI_PAGE_SHIFT; + + /* + * We can only use apply_to_page_range() if we can guarantee that the + * entire region was mapped using pages. This should be the case if the + * region does not cover any naturally aligned SECTION_SIZE sized + * blocks. + */ + if (round_down(base + size, SECTION_SIZE) < + round_up(base, SECTION_SIZE) + SECTION_SIZE) + return apply_to_page_range(mm, base, size, set_permissions, md); + + return 0; +} + int __init efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md) { struct map_desc desc = { @@ -34,5 +69,11 @@ int __init efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md) desc.type = MT_DEVICE; create_mapping_late(mm, &desc, true); + + /* + * If stricter permissions were specified, apply them now. + */ + if (md->attribute & (EFI_MEMORY_RO | EFI_MEMORY_XP)) + return efi_set_mapping_permissions(mm, md); return 0; } diff --git a/arch/arm/kernel/hw_breakpoint.c b/arch/arm/kernel/hw_breakpoint.c index 6284779d64ee..b8df45883cf7 100644 --- a/arch/arm/kernel/hw_breakpoint.c +++ b/arch/arm/kernel/hw_breakpoint.c @@ -631,7 +631,7 @@ int arch_validate_hwbkpt_settings(struct perf_event *bp) info->address &= ~alignment_mask; info->ctrl.len <<= offset; - if (!bp->overflow_handler) { + if (is_default_overflow_handler(bp)) { /* * Mismatch breakpoints are required for single-stepping * breakpoints. @@ -754,7 +754,7 @@ static void watchpoint_handler(unsigned long addr, unsigned int fsr, * mismatch breakpoint so we can single-step over the * watchpoint trigger. */ - if (!wp->overflow_handler) + if (is_default_overflow_handler(wp)) enable_single_step(wp, instruction_pointer(regs)); unlock: diff --git a/arch/arm/kernel/perf_callchain.c b/arch/arm/kernel/perf_callchain.c index 4e02ae5950ff..27563befa8a2 100644 --- a/arch/arm/kernel/perf_callchain.c +++ b/arch/arm/kernel/perf_callchain.c @@ -75,7 +75,7 @@ perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs) tail = (struct frame_tail __user *)regs->ARM_fp - 1; - while ((entry->nr < PERF_MAX_STACK_DEPTH) && + while ((entry->nr < sysctl_perf_event_max_stack) && tail && !((unsigned long)tail & 0x3)) tail = user_backtrace(tail, entry); } diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index 2c4bea39cf22..7d4e2850910c 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -883,7 +883,8 @@ static void __init request_standard_resources(const struct machine_desc *mdesc) request_resource(&ioport_resource, &lp2); } -#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE) +#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE) || \ + defined(CONFIG_EFI) struct screen_info screen_info = { .orig_video_lines = 30, .orig_video_cols = 80, |