diff options
| -rw-r--r-- | arch/arm64/include/asm/asm_pointer_auth.h | 22 | ||||
| -rw-r--r-- | arch/arm64/include/asm/smp.h | 11 | ||||
| -rw-r--r-- | arch/arm64/kernel/asm-offsets.c | 3 | ||||
| -rw-r--r-- | arch/arm64/kernel/head.S | 12 | ||||
| -rw-r--r-- | arch/arm64/kernel/sleep.S | 1 | ||||
| -rw-r--r-- | arch/arm64/kernel/smp.c | 8 | ||||
| -rw-r--r-- | arch/arm64/mm/proc.S | 44 |
7 files changed, 32 insertions, 69 deletions
diff --git a/arch/arm64/include/asm/asm_pointer_auth.h b/arch/arm64/include/asm/asm_pointer_auth.h index c85540a911d3..52dead2a8640 100644 --- a/arch/arm64/include/asm/asm_pointer_auth.h +++ b/arch/arm64/include/asm/asm_pointer_auth.h @@ -60,6 +60,28 @@ alternative_if ARM64_HAS_ADDRESS_AUTH alternative_else_nop_endif .endm + .macro __ptrauth_keys_init_cpu tsk, tmp1, tmp2, tmp3 + mrs \tmp1, id_aa64isar1_el1 + ubfx \tmp1, \tmp1, #ID_AA64ISAR1_APA_SHIFT, #8 + cbz \tmp1, .Lno_addr_auth\@ + mov_q \tmp1, (SCTLR_ELx_ENIA | SCTLR_ELx_ENIB | \ + SCTLR_ELx_ENDA | SCTLR_ELx_ENDB) + mrs \tmp2, sctlr_el1 + orr \tmp2, \tmp2, \tmp1 + msr sctlr_el1, \tmp2 + __ptrauth_keys_install_kernel_nosync \tsk, \tmp1, \tmp2, \tmp3 + isb +.Lno_addr_auth\@: + .endm + + .macro ptrauth_keys_init_cpu tsk, tmp1, tmp2, tmp3 +alternative_if_not ARM64_HAS_ADDRESS_AUTH + b .Lno_addr_auth\@ +alternative_else_nop_endif + __ptrauth_keys_init_cpu \tsk, \tmp1, \tmp2, \tmp3 +.Lno_addr_auth\@: + .endm + #else /* CONFIG_ARM64_PTR_AUTH */ .macro ptrauth_keys_install_user tsk, tmp1, tmp2, tmp3 diff --git a/arch/arm64/include/asm/smp.h b/arch/arm64/include/asm/smp.h index 40d5ba029615..ea268d88b6f7 100644 --- a/arch/arm64/include/asm/smp.h +++ b/arch/arm64/include/asm/smp.h @@ -23,14 +23,6 @@ #define CPU_STUCK_REASON_52_BIT_VA (UL(1) << CPU_STUCK_REASON_SHIFT) #define CPU_STUCK_REASON_NO_GRAN (UL(2) << CPU_STUCK_REASON_SHIFT) -/* Possible options for __cpu_setup */ -/* Option to setup primary cpu */ -#define ARM64_CPU_BOOT_PRIMARY (1) -/* Option to setup secondary cpus */ -#define ARM64_CPU_BOOT_SECONDARY (2) -/* Option to setup cpus for different cpu run time services */ -#define ARM64_CPU_RUNTIME (3) - #ifndef __ASSEMBLY__ #include <asm/percpu.h> @@ -96,9 +88,6 @@ asmlinkage void secondary_start_kernel(void); struct secondary_data { void *stack; struct task_struct *task; -#ifdef CONFIG_ARM64_PTR_AUTH - struct ptrauth_keys_kernel ptrauth_key; -#endif long status; }; diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c index 9981a0a5a87f..890ddd67b8bf 100644 --- a/arch/arm64/kernel/asm-offsets.c +++ b/arch/arm64/kernel/asm-offsets.c @@ -92,9 +92,6 @@ int main(void) BLANK(); DEFINE(CPU_BOOT_STACK, offsetof(struct secondary_data, stack)); DEFINE(CPU_BOOT_TASK, offsetof(struct secondary_data, task)); -#ifdef CONFIG_ARM64_PTR_AUTH - DEFINE(CPU_BOOT_PTRAUTH_KEY, offsetof(struct secondary_data, ptrauth_key)); -#endif BLANK(); #ifdef CONFIG_KVM_ARM_HOST DEFINE(VCPU_CONTEXT, offsetof(struct kvm_vcpu, arch.ctxt)); diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S index 57a91032b4c2..dc2b441d4ed8 100644 --- a/arch/arm64/kernel/head.S +++ b/arch/arm64/kernel/head.S @@ -13,6 +13,7 @@ #include <linux/init.h> #include <linux/irqchip/arm-gic-v3.h> +#include <asm/asm_pointer_auth.h> #include <asm/assembler.h> #include <asm/boot.h> #include <asm/ptrace.h> @@ -118,7 +119,6 @@ SYM_CODE_START(stext) * On return, the CPU will be ready for the MMU to be turned on and * the TCR will have been set. */ - mov x0, #ARM64_CPU_BOOT_PRIMARY bl __cpu_setup // initialise processor b __primary_switch SYM_CODE_END(stext) @@ -417,6 +417,10 @@ SYM_FUNC_START_LOCAL(__primary_switched) adr_l x5, init_task msr sp_el0, x5 // Save thread_info +#ifdef CONFIG_ARM64_PTR_AUTH + __ptrauth_keys_init_cpu x5, x6, x7, x8 +#endif + adr_l x8, vectors // load VBAR_EL1 with virtual msr vbar_el1, x8 // vector table address isb @@ -717,7 +721,6 @@ SYM_FUNC_START_LOCAL(secondary_startup) * Common entry point for secondary CPUs. */ bl __cpu_secondary_check52bitva - mov x0, #ARM64_CPU_BOOT_SECONDARY bl __cpu_setup // initialise processor adrp x1, swapper_pg_dir bl __enable_mmu @@ -739,6 +742,11 @@ SYM_FUNC_START_LOCAL(__secondary_switched) msr sp_el0, x2 mov x29, #0 mov x30, #0 + +#ifdef CONFIG_ARM64_PTR_AUTH + ptrauth_keys_init_cpu x2, x3, x4, x5 +#endif + b secondary_start_kernel SYM_FUNC_END(__secondary_switched) diff --git a/arch/arm64/kernel/sleep.S b/arch/arm64/kernel/sleep.S index 7b2f2e650c44..56b1fe9bfaa0 100644 --- a/arch/arm64/kernel/sleep.S +++ b/arch/arm64/kernel/sleep.S @@ -100,7 +100,6 @@ ENDPROC(__cpu_suspend_enter) .pushsection ".idmap.text", "awx" ENTRY(cpu_resume) bl el2_setup // if in EL2 drop to EL1 cleanly - mov x0, #ARM64_CPU_RUNTIME bl __cpu_setup /* enable the MMU early - so we can access sleep_save_stash by va */ adrp x1, swapper_pg_dir diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 061f60fe452f..d6d337d036f0 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -114,10 +114,6 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle) */ secondary_data.task = idle; secondary_data.stack = task_stack_page(idle) + THREAD_SIZE; -#if defined(CONFIG_ARM64_PTR_AUTH) - secondary_data.ptrauth_key.apia.lo = idle->thread.keys_kernel.apia.lo; - secondary_data.ptrauth_key.apia.hi = idle->thread.keys_kernel.apia.hi; -#endif update_cpu_boot_status(CPU_MMU_OFF); __flush_dcache_area(&secondary_data, sizeof(secondary_data)); @@ -140,10 +136,6 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle) pr_crit("CPU%u: failed to come online\n", cpu); secondary_data.task = NULL; secondary_data.stack = NULL; -#if defined(CONFIG_ARM64_PTR_AUTH) - secondary_data.ptrauth_key.apia.lo = 0; - secondary_data.ptrauth_key.apia.hi = 0; -#endif __flush_dcache_area(&secondary_data, sizeof(secondary_data)); status = READ_ONCE(secondary_data.status); if (status == CPU_MMU_OFF) diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S index 0401342741e6..7d3bf1afba0c 100644 --- a/arch/arm64/mm/proc.S +++ b/arch/arm64/mm/proc.S @@ -386,8 +386,6 @@ SYM_FUNC_END(idmap_kpti_install_ng_mappings) * * Initialise the processor for turning the MMU on. * - * Input: - * x0 with a flag ARM64_CPU_BOOT_PRIMARY/ARM64_CPU_BOOT_SECONDARY/ARM64_CPU_RUNTIME. * Output: * Return in x0 the value of the SCTLR_EL1 register. */ @@ -446,51 +444,9 @@ SYM_FUNC_START(__cpu_setup) 1: #endif /* CONFIG_ARM64_HW_AFDBM */ msr tcr_el1, x10 - mov x1, x0 /* * Prepare SCTLR */ mov_q x0, SCTLR_EL1_SET - -#ifdef CONFIG_ARM64_PTR_AUTH - /* No ptrauth setup for run time cpus */ - cmp x1, #ARM64_CPU_RUNTIME - b.eq 3f - - /* Check if the CPU supports ptrauth */ - mrs x2, id_aa64isar1_el1 - ubfx x2, x2, #ID_AA64ISAR1_APA_SHIFT, #8 - cbz x2, 3f - - /* - * The primary cpu keys are reset here and can be - * re-initialised with some proper values later. - */ - msr_s SYS_APIAKEYLO_EL1, xzr - msr_s SYS_APIAKEYHI_EL1, xzr - - /* Just enable ptrauth for primary cpu */ - cmp x1, #ARM64_CPU_BOOT_PRIMARY - b.eq 2f - - /* if !system_supports_address_auth() then skip enable */ -alternative_if_not ARM64_HAS_ADDRESS_AUTH - b 3f -alternative_else_nop_endif - - /* Install ptrauth key for secondary cpus */ - adr_l x2, secondary_data - ldr x3, [x2, #CPU_BOOT_TASK] // get secondary_data.task - cbz x3, 2f // check for slow booting cpus - ldp x3, x4, [x2, #CPU_BOOT_PTRAUTH_KEY] - msr_s SYS_APIAKEYLO_EL1, x3 - msr_s SYS_APIAKEYHI_EL1, x4 - -2: /* Enable ptrauth instructions */ - ldr x2, =SCTLR_ELx_ENIA | SCTLR_ELx_ENIB | \ - SCTLR_ELx_ENDA | SCTLR_ELx_ENDB - orr x0, x0, x2 -3: -#endif ret // return to head.S SYM_FUNC_END(__cpu_setup) |