diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-06-06 13:49:25 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-06-06 13:49:25 -0700 |
commit | 311da4975894aab7a4bb94aa83f38f052d7ffda4 (patch) | |
tree | 4de18b9cbeac4f21ed2aa7c8ec0ae515a56f368c /arch/arm | |
parent | ca95bf62fcf528a0d8069731d39303ba43fb9af4 (diff) | |
parent | 0ac000e86703dedea1000513dbb8a64d02930668 (diff) |
Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
Pull ARM updates from Russell King:
- Initial round of Spectre variant 1 and variant 2 fixes for 32-bit ARM
- Clang support improvements
- nommu updates for v8 MPU
- enable ARM_MODULE_PLTS by default to avoid problems loading modules
with larger kernels
- vmlinux.lds and dma-mapping cleanups
* 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: (31 commits)
ARM: spectre-v1: fix syscall entry
ARM: spectre-v1: add array_index_mask_nospec() implementation
ARM: spectre-v1: add speculation barrier (csdb) macros
ARM: KVM: report support for SMCCC_ARCH_WORKAROUND_1
ARM: KVM: Add SMCCC_ARCH_WORKAROUND_1 fast handling
ARM: spectre-v2: KVM: invalidate icache on guest exit for Brahma B15
ARM: KVM: invalidate icache on guest exit for Cortex-A15
ARM: KVM: invalidate BTB on guest exit for Cortex-A12/A17
ARM: spectre-v2: warn about incorrect context switching functions
ARM: spectre-v2: add firmware based hardening
ARM: spectre-v2: harden user aborts in kernel space
ARM: spectre-v2: add Cortex A8 and A15 validation of the IBE bit
ARM: spectre-v2: harden branch predictor on context switches
ARM: spectre: add Kconfig symbol for CPUs vulnerable to Spectre
ARM: bugs: add support for per-processor bug checking
ARM: bugs: hook processor bug checking into SMP and suspend paths
ARM: bugs: prepare processor bug infrastructure
ARM: add more CPU part numbers for Cortex and Brahma B15 CPUs
ARM: 8774/1: remove no-op macro VMLINUX_SYMBOL()
ARM: 8773/1: amba: Export amba_bustype
...
Diffstat (limited to 'arch/arm')
40 files changed, 1317 insertions, 210 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index c43f5bb55ac8..8f460bdd4be1 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1698,6 +1698,7 @@ config ARCH_WANT_GENERAL_HUGETLB config ARM_MODULE_PLTS bool "Use PLTs to allow module memory to spill over into vmalloc area" depends on MODULES + default y help Allocate PLTs when loading modules so that jumps and calls whose targets are too far away for their relative offsets to be encoded @@ -1708,7 +1709,8 @@ config ARM_MODULE_PLTS rounding up to page size, the actual memory footprint is usually the same. - Say y if you are getting out of memory errors while loading modules + Disabling this is usually safe for small single-platform + configurations. If unsure, say y. source "mm/Kconfig" diff --git a/arch/arm/Makefile b/arch/arm/Makefile index f32a5468d79f..1dc4045e1af6 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -106,7 +106,7 @@ tune-$(CONFIG_CPU_V6K) =$(call cc-option,-mtune=arm1136j-s,-mtune=strongarm) tune-y := $(tune-y) ifeq ($(CONFIG_AEABI),y) -CFLAGS_ABI :=-mabi=aapcs-linux -mno-thumb-interwork -mfpu=vfp +CFLAGS_ABI :=-mabi=aapcs-linux -mfpu=vfp else CFLAGS_ABI :=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,) endif diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile index 6a4e7341ecd3..a3c5fbcad4ab 100644 --- a/arch/arm/boot/compressed/Makefile +++ b/arch/arm/boot/compressed/Makefile @@ -113,7 +113,7 @@ CFLAGS_fdt_ro.o := $(nossp_flags) CFLAGS_fdt_rw.o := $(nossp_flags) CFLAGS_fdt_wip.o := $(nossp_flags) -ccflags-y := -fpic -mno-single-pic-base -fno-builtin -I$(obj) +ccflags-y := -fpic $(call cc-option,-mno-single-pic-base,) -fno-builtin -I$(obj) asflags-y := -DZIMAGE # Supply kernel BSS size to the decompressor via a linker symbol. diff --git a/arch/arm/include/asm/assembler.h b/arch/arm/include/asm/assembler.h index 9342904cccca..0cd4dccbae78 100644 --- a/arch/arm/include/asm/assembler.h +++ b/arch/arm/include/asm/assembler.h @@ -447,6 +447,14 @@ THUMB( orr \reg , \reg , #PSR_T_BIT ) .size \name , . - \name .endm + .macro csdb +#ifdef CONFIG_THUMB2_KERNEL + .inst.w 0xf3af8014 +#else + .inst 0xe320f014 +#endif + .endm + .macro check_uaccess, addr:req, size:req, limit:req, tmp:req, bad:req #ifndef CONFIG_CPU_USE_DOMAINS adds \tmp, \addr, #\size - 1 diff --git a/arch/arm/include/asm/barrier.h b/arch/arm/include/asm/barrier.h index 40f5c410fd8c..69772e742a0a 100644 --- a/arch/arm/include/asm/barrier.h +++ b/arch/arm/include/asm/barrier.h @@ -17,6 +17,12 @@ #define isb(option) __asm__ __volatile__ ("isb " #option : : : "memory") #define dsb(option) __asm__ __volatile__ ("dsb " #option : : : "memory") #define dmb(option) __asm__ __volatile__ ("dmb " #option : : : "memory") +#ifdef CONFIG_THUMB2_KERNEL +#define CSDB ".inst.w 0xf3af8014" +#else +#define CSDB ".inst 0xe320f014" +#endif +#define csdb() __asm__ __volatile__(CSDB : : : "memory") #elif defined(CONFIG_CPU_XSC3) || __LINUX_ARM_ARCH__ == 6 #define isb(x) __asm__ __volatile__ ("mcr p15, 0, %0, c7, c5, 4" \ : : "r" (0) : "memory") @@ -37,6 +43,13 @@ #define dmb(x) __asm__ __volatile__ ("" : : : "memory") #endif +#ifndef CSDB +#define CSDB +#endif +#ifndef csdb +#define csdb() +#endif + #ifdef CONFIG_ARM_HEAVY_MB extern void (*soc_mb)(void); extern void arm_heavy_mb(void); @@ -63,6 +76,25 @@ extern void arm_heavy_mb(void); #define __smp_rmb() __smp_mb() #define __smp_wmb() dmb(ishst) +#ifdef CONFIG_CPU_SPECTRE +static inline unsigned long array_index_mask_nospec(unsigned long idx, + unsigned long sz) +{ + unsigned long mask; + + asm volatile( + "cmp %1, %2\n" + " sbc %0, %1, %1\n" + CSDB + : "=r" (mask) + : "r" (idx), "Ir" (sz) + : "cc"); + + return mask; +} +#define array_index_mask_nospec array_index_mask_nospec +#endif + #include <asm-generic/barrier.h> #endif /* !__ASSEMBLY__ */ diff --git a/arch/arm/include/asm/bugs.h b/arch/arm/include/asm/bugs.h index a97f1ea708d1..73a99c72a930 100644 --- a/arch/arm/include/asm/bugs.h +++ b/arch/arm/include/asm/bugs.h @@ -10,12 +10,14 @@ #ifndef __ASM_BUGS_H #define __ASM_BUGS_H -#ifdef CONFIG_MMU extern void check_writebuffer_bugs(void); -#define check_bugs() check_writebuffer_bugs() +#ifdef CONFIG_MMU +extern void check_bugs(void); +extern void check_other_bugs(void); #else #define check_bugs() do { } while (0) +#define check_other_bugs() do { } while (0) #endif #endif diff --git a/arch/arm/include/asm/cp15.h b/arch/arm/include/asm/cp15.h index 4c9fa72b59f5..07e27f212dc7 100644 --- a/arch/arm/include/asm/cp15.h +++ b/arch/arm/include/asm/cp15.h @@ -65,6 +65,9 @@ #define __write_sysreg(v, r, w, c, t) asm volatile(w " " c : : "r" ((t)(v))) #define write_sysreg(v, ...) __write_sysreg(v, __VA_ARGS__) +#define BPIALL __ACCESS_CP15(c7, 0, c5, 6) +#define ICIALLU __ACCESS_CP15(c7, 0, c5, 0) + extern unsigned long cr_alignment; /* defined in entry-armv.S */ static inline unsigned long get_cr(void) diff --git a/arch/arm/include/asm/cputype.h b/arch/arm/include/asm/cputype.h index cb546425da8a..26021980504d 100644 --- a/arch/arm/include/asm/cputype.h +++ b/arch/arm/include/asm/cputype.h @@ -77,8 +77,16 @@ #define ARM_CPU_PART_CORTEX_A12 0x4100c0d0 #define ARM_CPU_PART_CORTEX_A17 0x4100c0e0 #define ARM_CPU_PART_CORTEX_A15 0x4100c0f0 +#define ARM_CPU_PART_CORTEX_A53 0x4100d030 +#define ARM_CPU_PART_CORTEX_A57 0x4100d070 +#define ARM_CPU_PART_CORTEX_A72 0x4100d080 +#define ARM_CPU_PART_CORTEX_A73 0x4100d090 +#define ARM_CPU_PART_CORTEX_A75 0x4100d0a0 #define ARM_CPU_PART_MASK 0xff00fff0 +/* Broadcom cores */ +#define ARM_CPU_PART_BRAHMA_B15 0x420000f0 + /* DEC implemented cores */ #define ARM_CPU_PART_SA1100 0x4400a110 diff --git a/arch/arm/include/asm/kgdb.h b/arch/arm/include/asm/kgdb.h index 3b73fdcf3627..8de1100d1067 100644 --- a/arch/arm/include/asm/kgdb.h +++ b/arch/arm/include/asm/kgdb.h @@ -77,7 +77,7 @@ extern int kgdb_fault_expected; #define KGDB_MAX_NO_CPUS 1 #define BUFMAX 400 -#define NUMREGBYTES (DBG_MAX_REG_NUM << 2) +#define NUMREGBYTES (GDB_MAX_REGS << 2) #define NUMCRITREGBYTES (32 << 2) #define _R0 0 diff --git a/arch/arm/include/asm/kvm_asm.h b/arch/arm/include/asm/kvm_asm.h index 5a953ecb0d78..231e87ad45d5 100644 --- a/arch/arm/include/asm/kvm_asm.h +++ b/arch/arm/include/asm/kvm_asm.h @@ -61,8 +61,6 @@ struct kvm_vcpu; extern char __kvm_hyp_init[]; extern char __kvm_hyp_init_end[]; -extern char __kvm_hyp_vector[]; - extern void __kvm_flush_vm_context(void); extern void __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa); extern void __kvm_tlb_flush_vmid(struct kvm *kvm); diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h index c7c28c885a19..343fc9e6f78d 100644 --- a/arch/arm/include/asm/kvm_host.h +++ b/arch/arm/include/asm/kvm_host.h @@ -21,6 +21,7 @@ #include <linux/types.h> #include <linux/kvm_types.h> +#include <asm/cputype.h> #include <asm/kvm.h> #include <asm/kvm_asm.h> #include <asm/kvm_mmio.h> @@ -311,8 +312,17 @@ static inline void kvm_arm_vhe_guest_exit(void) {} static inline bool kvm_arm_harden_branch_predictor(void) { - /* No way to detect it yet, pretend it is not there. */ - return false; + switch(read_cpuid_part()) { +#ifdef CONFIG_HARDEN_BRANCH_PREDICTOR + case ARM_CPU_PART_BRAHMA_B15: + case ARM_CPU_PART_CORTEX_A12: + case ARM_CPU_PART_CORTEX_A15: + case ARM_CPU_PART_CORTEX_A17: + return true; +#endif + default: + return false; + } } static inline void kvm_vcpu_load_sysregs(struct kvm_vcpu *vcpu) {} diff --git a/arch/arm/include/asm/kvm_mmu.h b/arch/arm/include/asm/kvm_mmu.h index f675162663f0..c94d291fd1a8 100644 --- a/arch/arm/include/asm/kvm_mmu.h +++ b/arch/arm/include/asm/kvm_mmu.h @@ -327,7 +327,28 @@ static inline int kvm_read_guest_lock(struct kvm *kvm, static inline void *kvm_get_hyp_vector(void) { - return kvm_ksym_ref(__kvm_hyp_vector); + switch(read_cpuid_part()) { +#ifdef CONFIG_HARDEN_BRANCH_PREDICTOR + case ARM_CPU_PART_CORTEX_A12: + case ARM_CPU_PART_CORTEX_A17: + { + extern char __kvm_hyp_vector_bp_inv[]; + return kvm_ksym_ref(__kvm_hyp_vector_bp_inv); + } + + case ARM_CPU_PART_BRAHMA_B15: + case ARM_CPU_PART_CORTEX_A15: + { + extern char __kvm_hyp_vector_ic_inv[]; + return kvm_ksym_ref(__kvm_hyp_vector_ic_inv); + } +#endif + default: + { + extern char __kvm_hyp_vector[]; + return kvm_ksym_ref(__kvm_hyp_vector); + } + } } static inline int kvm_map_vectors(void) diff --git a/arch/arm/include/asm/mpu.h b/arch/arm/include/asm/mpu.h index 6d1491c8ee22..5e088c83d3d8 100644 --- a/arch/arm/include/asm/mpu.h +++ b/arch/arm/include/asm/mpu.h @@ -12,60 +12,101 @@ /* ID_MMFR0 data relevant to MPU */ #define MMFR0_PMSA (0xF << 4) #define MMFR0_PMSAv7 (3 << 4) +#define MMFR0_PMSAv8 (4 << 4) /* MPU D/I Size Register fields */ -#define MPU_RSR_SZ 1 -#define MPU_RSR_EN 0 -#define MPU_RSR_SD 8 +#define PMSAv7_RSR_SZ 1 +#define PMSAv7_RSR_EN 0 +#define PMSAv7_RSR_SD 8 /* Number of subregions (SD) */ -#define MPU_NR_SUBREGS 8 -#define MPU_MIN_SUBREG_SIZE 256 +#define PMSAv7_NR_SUBREGS 8 +#define PMSAv7_MIN_SUBREG_SIZE 256 /* The D/I RSR value for an enabled region spanning the whole of memory */ -#define MPU_RSR_ALL_MEM 63 +#define PMSAv7_RSR_ALL_MEM 63 /* Individual bits in the DR/IR ACR */ -#define MPU_ACR_XN (1 << 12) -#define MPU_ACR_SHARED (1 << 2) +#define PMSAv7_ACR_XN (1 << 12) +#define PMSAv7_ACR_SHARED (1 << 2) /* C, B and TEX[2:0] bits only have semantic meanings when grouped */ -#define MPU_RGN_CACHEABLE 0xB -#define MPU_RGN_SHARED_CACHEABLE (MPU_RGN_CACHEABLE | MPU_ACR_SHARED) -#define MPU_RGN_STRONGLY_ORDERED 0 +#define PMSAv7_RGN_CACHEABLE 0xB +#define PMSAv7_RGN_SHARED_CACHEABLE (PMSAv7_RGN_CACHEABLE | PMSAv7_ACR_SHARED) +#define PMSAv7_RGN_STRONGLY_ORDERED 0 /* Main region should only be shared for SMP */ #ifdef CONFIG_SMP -#define MPU_RGN_NORMAL (MPU_RGN_CACHEABLE | MPU_ACR_SHARED) +#define PMSAv7_RGN_NORMAL (PMSAv7_RGN_CACHEABLE | PMSAv7_ACR_SHARED) #else -#define MPU_RGN_NORMAL MPU_RGN_CACHEABLE +#define PMSAv7_RGN_NORMAL PMSAv7_RGN_CACHEABLE #endif /* Access permission bits of ACR (only define those that we use)*/ -#define MPU_AP_PL1RO_PL0NA (0x5 << 8) -#define MPU_AP_PL1RW_PL0RW (0x3 << 8) -#define MPU_AP_PL1RW_PL0R0 (0x2 << 8) -#define MPU_AP_PL1RW_PL0NA (0x1 << 8) +#define PMSAv7_AP_PL1RO_PL0NA (0x5 << 8) +#define PMSAv7_AP_PL1RW_PL0RW (0x3 << 8) +#define PMSAv7_AP_PL1RW_PL0R0 (0x2 << 8) +#define PMSAv7_AP_PL1RW_PL0NA (0x1 << 8) + +#define PMSAv8_BAR_XN 1 + +#define PMSAv8_LAR_EN 1 +#define PMSAv8_LAR_IDX(n) (((n) & 0x7) << 1) + + +#define PMSAv8_AP_PL1RW_PL0NA (0 << 1) +#define PMSAv8_AP_PL1RW_PL0RW (1 << 1) +#define PMSAv8_AP_PL1RO_PL0RO (3 << 1) + +#ifdef CONFIG_SMP +#define PMSAv8_RGN_SHARED (3 << 3) // inner sharable +#else +#define PMSAv8_RGN_SHARED (0 << 3) +#endif + +#define PMSAv8_RGN_DEVICE_nGnRnE 0 +#define PMSAv8_RGN_NORMAL 1 + +#define PMSAv8_MAIR(attr, mt) ((attr) << ((mt) * 8)) + +#ifdef CONFIG_CPU_V7M +#define PMSAv8_MINALIGN 32 +#else +#define PMSAv8_MINALIGN 64 +#endif /* For minimal static MPU region configurations */ -#define MPU_PROBE_REGION 0 -#define MPU_BG_REGION 1 -#define MPU_RAM_REGION 2 -#define MPU_ROM_REGION 3 +#define PMSAv7_PROBE_REGION 0 +#define PMSAv7_BG_REGION 1 +#define PMSAv7_RAM_REGION 2 +#define PMSAv7_ROM_REGION 3 + +/* Fixed for PMSAv8 only */ +#define PMSAv8_XIP_REGION 0 +#define PMSAv8_KERNEL_REGION 1 /* Maximum number of regions Linux is interested in */ -#define MPU_MAX_REGIONS 16 +#define MPU_MAX_REGIONS 16 -#define MPU_DATA_SIDE 0 -#define MPU_INSTR_SIDE 1 +#define PMSAv7_DATA_SIDE 0 +#define PMSAv7_INSTR_SIDE 1 #ifndef __ASSEMBLY__ struct mpu_rgn { /* Assume same attributes for d/i-side */ - u32 drbar; - u32 drsr; - u32 dracr; + union { + u32 drbar; /* PMSAv7 */ + u32 prbar; /* PMSAv8 */ + }; + union { + u32 drsr; /* PMSAv7 */ + u32 prlar; /* PMSAv8 */ + }; + union { + u32 dracr; /* PMSAv7 */ + u32 unused; /* not used in PMSAv8 */ + }; }; struct mpu_rgn_info { @@ -75,16 +116,17 @@ struct mpu_rgn_info { extern struct mpu_rgn_info mpu_rgn_info; #ifdef CONFIG_ARM_MPU +extern void __init pmsav7_adjust_lowmem_bounds(void); +extern void __init pmsav8_adjust_lowmem_bounds(void); -extern void __init adjust_lowmem_bounds_mpu(void); -extern void __init mpu_setup(void); - +extern void __init pmsav7_setup(void); +extern void __init pmsav8_setup(void); #else - -static inline void adjust_lowmem_bounds_mpu(void) {} -static inline void mpu_setup(void) {} - -#endif /* !CONFIG_ARM_MPU */ +static inline void pmsav7_adjust_lowmem_bounds(void) {}; +static inline void pmsav8_adjust_lowmem_bounds(void) {}; +static inline void pmsav7_setup(void) {}; +static inline void pmsav8_setup(void) {}; +#endif #endif /* __ASSEMBLY__ */ diff --git a/arch/arm/include/asm/proc-fns.h b/arch/arm/include/asm/proc-fns.h index f2e1af45bd6f..e25f4392e1b2 100644 --- a/arch/arm/include/asm/proc-fns.h +++ b/arch/arm/include/asm/proc-fns.h @@ -37,6 +37,10 @@ extern struct processor { */ void (*_proc_init)(void); /* + * Check for processor bugs + */ + void (*check_bugs)(void); + /* * Disable any processor specifics */ void (*_proc_fin)(void); diff --git a/arch/arm/include/asm/system_misc.h b/arch/arm/include/asm/system_misc.h index 78f6db114faf..8e76db83c498 100644 --- a/arch/arm/include/asm/system_misc.h +++ b/arch/arm/include/asm/system_misc.h @@ -8,6 +8,7 @@ #include <linux/linkage.h> #include <linux/irqflags.h> #include <linux/reboot.h> +#include <linux/percpu.h> extern void cpu_init(void); @@ -15,6 +16,20 @@ void soft_restart(unsigned long); extern void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd); extern void (*arm_pm_idle)(void); +#ifdef CONFIG_HARDEN_BRANCH_PREDICTOR +typedef void (*harden_branch_predictor_fn_t)(void); +DECLARE_PER_CPU(harden_branch_predictor_fn_t, harden_branch_predictor_fn); +static inline void harden_branch_predictor(void) +{ + harden_branch_predictor_fn_t fn = per_cpu(harden_branch_predictor_fn, + smp_processor_id()); + if (fn) + fn(); +} +#else +#define harden_branch_predictor() do { } while (0) +#endif + #define UDBG_UNDEFINED (1 << 0) #define UDBG_SYSCALL (1 << 1) #define UDBG_BADABORT (1 << 2) diff --git a/arch/arm/include/asm/uaccess.h b/arch/arm/include/asm/uaccess.h index 0bf2347495f1..3d614e90c19f 100644 --- a/arch/arm/include/asm/uaccess.h +++ b/arch/arm/include/asm/uaccess.h @@ -152,7 +152,7 @@ extern int __get_user_64t_4(void *); #define __get_user_check(x, p) \ ({ \ unsigned long __limit = current_thread_info()->addr_limit - 1; \ - register const typeof(*(p)) __user *__p asm("r0") = (p);\ + register typeof(*(p)) __user *__p asm("r0") = (p); \ register typeof(x) __r2 asm("r2"); \ register unsigned long __l asm("r1") = __limit; \ register int __e asm("r0"); \ diff --git a/arch/arm/include/asm/v7m.h b/arch/arm/include/asm/v7m.h index 634e77107425..187ccf6496ad 100644 --- a/arch/arm/include/asm/v7m.h +++ b/arch/arm/include/asm/v7m.h @@ -64,9 +64,17 @@ #define MPU_CTRL_ENABLE 1 #define MPU_CTRL_PRIVDEFENA (1 << 2) -#define MPU_RNR 0x98 -#define MPU_RBAR 0x9c -#define MPU_RASR 0xa0 +#define PMSAv7_RNR 0x98 +#define PMSAv7_RBAR 0x9c +#define PMSAv7_RASR 0xa0 + +#define PMSAv8_RNR 0x98 +#define PMSAv8_RBAR 0x9c +#define PMSAv8_RLAR 0xa0 +#define PMSAv8_RBAR_A(n) (PMSAv8_RBAR + 8*(n)) +#define PMSAv8_RLAR_A(n) (PMSAv8_RLAR + 8*(n)) +#define PMSAv8_MAIR0 0xc0 +#define PMSAv8_MAIR1 0xc4 /* Cache opeartions */ #define V7M_SCB_ICIALLU 0x250 /* I-cache invalidate all to PoU */ diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile index b59ac4bf82b8..8cad59465af3 100644 --- a/arch/arm/kernel/Makefile +++ b/arch/arm/kernel/Makefile @@ -31,6 +31,7 @@ else obj-y += entry-armv.o endif +obj-$(CONFIG_MMU) += bugs.o obj-$(CONFIG_CPU_IDLE) += cpuidle.o obj-$(CONFIG_ISA_DMA_API) += dma.o obj-$(CONFIG_FIQ) += fiq.o fiqasm.o diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c index f369ece99958..27c5381518d8 100644 --- a/arch/arm/kernel/asm-offsets.c +++ b/arch/arm/kernel/asm-offsets.c @@ -194,9 +194,11 @@ int main(void) DEFINE(MPU_RNG_INFO_USED, offsetof(struct mpu_rgn_info, used)); DEFINE(MPU_RNG_SIZE, sizeof(struct mpu_rgn)); - DEFINE(MPU_RGN_DRBAR, offsetof(struct mpu_rgn, drbar)); - DEFINE(MPU_RGN_DRSR, offsetof(struct mpu_rgn, drsr)); - DEFINE(MPU_RGN_DRACR, offsetof(struct mpu_rgn, dracr)); + DEFINE(MPU_RGN_DRBAR, offsetof(struct mpu_rgn, drbar)); + DEFINE(MPU_RGN_DRSR, offsetof(struct mpu_rgn, drsr)); + DEFINE(MPU_RGN_DRACR, offsetof(struct mpu_rgn, dracr)); + DEFINE(MPU_RGN_PRBAR, offsetof(struct mpu_rgn, prbar)); + DEFINE(MPU_RGN_PRLAR, offsetof(struct mpu_rgn, prlar)); #endif return 0; } diff --git a/arch/arm/kernel/bugs.c b/arch/arm/kernel/bugs.c new file mode 100644 index 000000000000..7be511310191 --- /dev/null +++ b/arch/arm/kernel/bugs.c @@ -0,0 +1,18 @@ +// SPDX-Identifier: GPL-2.0 +#include <linux/init.h> +#include <asm/bugs.h> +#include <asm/proc-fns.h> + +void check_other_bugs(void) +{ +#ifdef MULTI_CPU + if (processor.check_bugs) + processor.check_bugs(); +#endif +} + +void __init check_bugs(void) +{ + check_writebuffer_bugs(); + check_other_bugs(); +} diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S index 3c4f88701f22..20df608bf343 100644 --- a/arch/arm/kernel/entry-common.S +++ b/arch/arm/kernel/entry-common.S @@ -242,9 +242,7 @@ local_restart: tst r10, #_TIF_SYSCALL_WORK @ are we tracing syscalls? bne __sys_trace - cmp scno, #NR_syscalls @ check upper syscall limit - badr lr, ret_fast_syscall @ return address - ldrcc pc, [tbl, scno, lsl #2] @ call sys_* routine + invoke_syscall tbl, scno, r10, ret_fast_syscall add r1, sp, #S_OFF 2: cmp scno, #(__ARM_NR_BASE - __NR_SYSCALL_BASE) @@ -278,14 +276,8 @@ __sys_trace: mov r1, scno add r0, sp, #S_OFF bl syscall_trace_enter - - badr lr, __sys_trace_return @ return address - mov scno, r0 @ syscall number (possibly new) - add r1, sp, #S_R0 + S_OFF @ pointer to regs - cmp scno, #NR_syscalls @ check upper syscall limit - ldmccia r1, {r0 - r6} @ have to reload r0 - r6 - stmccia sp, {r4, r5} @ and update the stack args - ldrcc pc, [tbl, scno, lsl #2] @ call sys_* routine + mov scno, r0 + invoke_syscall tbl, scno, r10, __sys_trace_return, reload=1 cmp scno, #-1 @ skip the syscall? bne 2b add sp, sp, #S_OFF @ restore stack @@ -363,6 +355,10 @@ sys_syscall: bic scno, r0, #__NR_OABI_SYSCALL_BASE cmp scno, #__NR_syscall - __NR_SYSCALL_BASE cmpne scno, #NR_syscalls @ check range +#ifdef CONFIG_CPU_SPECTRE + movhs scno, #0 + csdb +#endif stmloia sp, {r5, r6} @ shuffle args movlo r0, r1 movlo r1, r2 diff --git a/arch/arm/kernel/entry-header.S b/arch/arm/kernel/entry-header.S index 0f07579af472..773424843d6e 100644 --- a/arch/arm/kernel/entry-header.S +++ b/arch/arm/kernel/entry-header.S @@ -378,6 +378,31 @@ #endif .endm + .macro invoke_syscall, table, nr, tmp, ret, reload=0 +#ifdef CONFIG_CPU_SPECTRE + mov \tmp, \nr + cmp \tmp, #NR_syscalls @ check upper syscall limit + movcs \tmp, #0 + csdb + badr lr, \ret @ return address + .if \reload + add r1, sp, #S_R0 + S_OFF @ pointer to regs + ldmccia r1, {r0 - r6} @ reload r0-r6 + stmccia sp, {r4, r5} @ update stack arguments + .endif + ldrcc pc, [\table, \tmp, lsl #2] @ call sys_* routine +#else + cmp \nr, #NR_syscalls @ check upper syscall limit + badr lr, \ret @ return address + .if \reload + add r1, sp, #S_R0 + S_OFF @ pointer to regs + ldmccia r1, {r0 - r6} @ reload r0-r6 + stmccia sp, {r4, r5} @ update stack arguments + .endif + ldrcc pc, [\table, \nr, lsl #2] @ call sys_* routine +#endif + .endm + /* * These are the registers used in the syscall handler, and allow us to * have in theory up to 7 arguments to a function - r0 to r6. diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S index 2e38f85b757a..dd546d65a383 100644 --- a/arch/arm/kernel/head-nommu.S +++ b/arch/arm/kernel/head-nommu.S @@ -68,14 +68,6 @@ ENTRY(stext) beq __error_p @ yes, error 'p' #ifdef CONFIG_ARM_MPU - /* Calculate the size of a region covering just the kernel */ - ldr r5, =PLAT_PHYS_OFFSET @ Region start: PHYS_OFFSET - ldr r6, =(_end) @ Cover whole kernel - sub r6, r6, r5 @ Minimum size of region to map - clz r6, r6 @ Region size must be 2^N... - rsb r6, r6, #31 @ ...so round up region size - lsl r6, r6, #MPU_RSR_SZ @ Put size in right field - orr r6, r6, #(1 << MPU_RSR_EN) @ Set region enabled bit bl __setup_mpu #endif @@ -83,8 +75,8 @@ ENTRY(stext) ldr r12, [r10, #PROCINFO_INITFUNC] add r12, r12, r10 ret r12 -1: bl __after_proc_init - b __mmap_switched +1: ldr lr, =__mmap_switched + b __after_proc_init ENDPROC(stext) #ifdef CONFIG_SMP @@ -110,8 +102,6 @@ ENTRY(secondary_startup) ldr r7, __secondary_data #ifdef CONFIG_ARM_MPU - /* Use MPU region info supplied by __cpu_up */ - ldr r6, [r7] @ get secondary_data.mpu_rgn_info bl __secondary_setup_mpu @ Initialize the MPU #endif @@ -133,12 +123,45 @@ __secondary_data: /* * Set the Control Register and Read the process ID. */ + .text __after_proc_init: +#ifdef CONFIG_ARM_MPU +M_CLASS(movw r12, #:lower16:BASEADDR_V7M_SCB) +M_CLASS(movt r12, #:upper16:BASEADDR_V7M_SCB) +M_CLASS(ldr r3, [r12, 0x50]) +AR_CLASS(mrc p15, 0, r3, c0, c1, 4) @ Read ID_MMFR0 + and r3, r3, #(MMFR0_PMSA) @ PMSA field + teq r3, #(MMFR0_PMSAv7) @ PMSA v7 + beq 1f + teq r3, #(MMFR0_PMSAv8) @ PMSA v8 + /* + * Memory region attributes for PMSAv8: + * + * n = AttrIndx[2:0] + * n MAIR + * DEVICE_nGnRnE 000 00000000 + * NORMAL 001 11111111 + */ + ldreq r3, =PMSAv8_MAIR(0x00, PMSAv8_RGN_DEVICE_nGnRnE) | \ + PMSAv8_MAIR(0xff, PMSAv8_RGN_NORMAL) +AR_CLASS(mcreq p15, 0, r3, c10, c2, |