diff options
author | Max Krummenacher <max.krummenacher@toradex.com> | 2020-02-24 13:05:16 +0100 |
---|---|---|
committer | Max Krummenacher <max.krummenacher@toradex.com> | 2020-02-24 13:05:16 +0100 |
commit | 8be6754822fc0025f963e8216cf5cfe5cf01965d (patch) | |
tree | 76fce8f223ed0e9986d2f7ee8477182606f00862 /arch/arm/kernel | |
parent | 93bf1d7cbe98985ba4540b6889011ebbb742da5b (diff) | |
parent | 76e5c6fd6d163f1aa63969cc982e79be1fee87a7 (diff) |
Merge tag 'v4.4.214' into toradex_vf_4.4-next
This is the 4.4.214 stable release
Diffstat (limited to 'arch/arm/kernel')
-rw-r--r-- | arch/arm/kernel/Makefile | 4 | ||||
-rw-r--r-- | arch/arm/kernel/armksyms.c | 6 | ||||
-rw-r--r-- | arch/arm/kernel/bugs.c | 18 | ||||
-rw-r--r-- | arch/arm/kernel/entry-common.S | 27 | ||||
-rw-r--r-- | arch/arm/kernel/entry-header.S | 25 | ||||
-rw-r--r-- | arch/arm/kernel/head-common.S | 6 | ||||
-rw-r--r-- | arch/arm/kernel/machine_kexec.c | 5 | ||||
-rw-r--r-- | arch/arm/kernel/patch.c | 6 | ||||
-rw-r--r-- | arch/arm/kernel/psci-call.S | 31 | ||||
-rw-r--r-- | arch/arm/kernel/setup.c | 40 | ||||
-rw-r--r-- | arch/arm/kernel/signal.c | 125 | ||||
-rw-r--r-- | arch/arm/kernel/sleep.S | 12 | ||||
-rw-r--r-- | arch/arm/kernel/smccc-call.S | 62 | ||||
-rw-r--r-- | arch/arm/kernel/smp.c | 40 | ||||
-rw-r--r-- | arch/arm/kernel/suspend.c | 2 | ||||
-rw-r--r-- | arch/arm/kernel/sys_oabi-compat.c | 16 | ||||
-rw-r--r-- | arch/arm/kernel/unwind.c | 14 |
17 files changed, 298 insertions, 141 deletions
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile index 3c789496297f..649bc3300c93 100644 --- a/arch/arm/kernel/Makefile +++ b/arch/arm/kernel/Makefile @@ -30,6 +30,7 @@ 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 @@ -87,8 +88,9 @@ obj-$(CONFIG_EARLY_PRINTK) += early_printk.o obj-$(CONFIG_ARM_VIRT_EXT) += hyp-stub.o ifeq ($(CONFIG_ARM_PSCI),y) -obj-y += psci-call.o obj-$(CONFIG_SMP) += psci_smp.o endif +obj-$(CONFIG_HAVE_ARM_SMCCC) += smccc-call.o + extra-y := $(head-y) vmlinux.lds diff --git a/arch/arm/kernel/armksyms.c b/arch/arm/kernel/armksyms.c index f89811fb9a55..7e45f69a0ddc 100644 --- a/arch/arm/kernel/armksyms.c +++ b/arch/arm/kernel/armksyms.c @@ -16,6 +16,7 @@ #include <linux/syscalls.h> #include <linux/uaccess.h> #include <linux/io.h> +#include <linux/arm-smccc.h> #include <asm/checksum.h> #include <asm/ftrace.h> @@ -175,3 +176,8 @@ EXPORT_SYMBOL(__gnu_mcount_nc); EXPORT_SYMBOL(__pv_phys_pfn_offset); EXPORT_SYMBOL(__pv_offset); #endif + +#ifdef CONFIG_HAVE_ARM_SMCCC +EXPORT_SYMBOL(arm_smccc_smc); +EXPORT_SYMBOL(arm_smccc_hvc); +#endif diff --git a/arch/arm/kernel/bugs.c b/arch/arm/kernel/bugs.c new file mode 100644 index 000000000000..d41d3598e5e5 --- /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 (cpu_check_bugs) + cpu_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 30a7228eaceb..d31f0300d2c9 100644 --- a/arch/arm/kernel/entry-common.S +++ b/arch/arm/kernel/entry-common.S @@ -223,9 +223,7 @@ 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) @@ -258,27 +256,20 @@ __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 - b ret_slow_syscall -__sys_trace_return: - str r0, [sp, #S_R0 + S_OFF]! @ save returned r0 +__sys_trace_return_nosave: + enable_irq_notrace mov r0, sp bl syscall_trace_exit b ret_slow_syscall -__sys_trace_return_nosave: - enable_irq_notrace +__sys_trace_return: + str r0, [sp, #S_R0 + S_OFF]! @ save returned r0 mov r0, sp bl syscall_trace_exit b ret_slow_syscall @@ -317,6 +308,10 @@ 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 6d243e830516..86dfee487e24 100644 --- a/arch/arm/kernel/entry-header.S +++ b/arch/arm/kernel/entry-header.S @@ -373,6 +373,31 @@ #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-common.S b/arch/arm/kernel/head-common.S index 8733012d231f..7e662bdd5cb3 100644 --- a/arch/arm/kernel/head-common.S +++ b/arch/arm/kernel/head-common.S @@ -122,6 +122,9 @@ __mmap_switched_data: .long init_thread_union + THREAD_START_SP @ sp .size __mmap_switched_data, . - __mmap_switched_data + __FINIT + .text + /* * This provides a C-API version of __lookup_processor_type */ @@ -133,9 +136,6 @@ ENTRY(lookup_processor_type) ldmfd sp!, {r4 - r6, r9, pc} ENDPROC(lookup_processor_type) - __FINIT - .text - /* * Read processor ID register (CP#15, CR0), and look up in the linker-built * supported processor list. Note that we can't use the absolute addresses diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c index 8bf3b7c09888..46519916a465 100644 --- a/arch/arm/kernel/machine_kexec.c +++ b/arch/arm/kernel/machine_kexec.c @@ -87,8 +87,11 @@ void machine_crash_nonpanic_core(void *unused) set_cpu_online(smp_processor_id(), false); atomic_dec(&waiting_for_crash_ipi); - while (1) + + while (1) { cpu_relax(); + wfe(); + } } static void machine_kexec_mask_interrupts(void) diff --git a/arch/arm/kernel/patch.c b/arch/arm/kernel/patch.c index 69bda1a5707e..1f665acaa6a9 100644 --- a/arch/arm/kernel/patch.c +++ b/arch/arm/kernel/patch.c @@ -15,7 +15,7 @@ struct patch { unsigned int insn; }; -static DEFINE_SPINLOCK(patch_lock); +static DEFINE_RAW_SPINLOCK(patch_lock); static void __kprobes *patch_map(void *addr, int fixmap, unsigned long *flags) __acquires(&patch_lock) @@ -32,7 +32,7 @@ static void __kprobes *patch_map(void *addr, int fixmap, unsigned long *flags) return addr; if (flags) - spin_lock_irqsave(&patch_lock, *flags); + raw_spin_lock_irqsave(&patch_lock, *flags); else __acquire(&patch_lock); @@ -47,7 +47,7 @@ static void __kprobes patch_unmap(int fixmap, unsigned long *flags) clear_fixmap(fixmap); if (flags) - spin_unlock_irqrestore(&patch_lock, *flags); + raw_spin_unlock_irqrestore(&patch_lock, *flags); else __release(&patch_lock); } diff --git a/arch/arm/kernel/psci-call.S b/arch/arm/kernel/psci-call.S deleted file mode 100644 index a78e9e1e206d..000000000000 --- a/arch/arm/kernel/psci-call.S +++ /dev/null @@ -1,31 +0,0 @@ -/* - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * Copyright (C) 2015 ARM Limited - * - * Author: Mark Rutland <mark.rutland@arm.com> - */ - -#include <linux/linkage.h> - -#include <asm/opcodes-sec.h> -#include <asm/opcodes-virt.h> - -/* int __invoke_psci_fn_hvc(u32 function_id, u32 arg0, u32 arg1, u32 arg2) */ -ENTRY(__invoke_psci_fn_hvc) - __HVC(0) - bx lr -ENDPROC(__invoke_psci_fn_hvc) - -/* int __invoke_psci_fn_smc(u32 function_id, u32 arg0, u32 arg1, u32 arg2) */ -ENTRY(__invoke_psci_fn_smc) - __SMC(0) - bx lr -ENDPROC(__invoke_psci_fn_smc) diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index 20edd349d379..e9c3d38d995d 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -113,6 +113,11 @@ EXPORT_SYMBOL(elf_hwcap2); #ifdef MULTI_CPU struct processor processor __read_mostly; +#if defined(CONFIG_BIG_LITTLE) && defined(CONFIG_HARDEN_BRANCH_PREDICTOR) +struct processor *cpu_vtable[NR_CPUS] = { + [0] = &processor, +}; +#endif #endif #ifdef MULTI_TLB struct cpu_tlb_fns cpu_tlb __read_mostly; @@ -599,28 +604,33 @@ static void __init smp_build_mpidr_hash(void) } #endif -static void __init setup_processor(void) +/* + * locate processor in the list of supported processor types. The linker + * builds this table for us from the entries in arch/arm/mm/proc-*.S + */ +struct proc_info_list *lookup_processor(u32 midr) { - struct proc_info_list *list; + struct proc_info_list *list = lookup_processor_type(midr); - /* - * locate processor in the list of supported processor - * types. The linker builds this table for us from the - * entries in arch/arm/mm/proc-*.S - */ - list = lookup_processor_type(read_cpuid_id()); if (!list) { - pr_err("CPU configuration botched (ID %08x), unable to continue.\n", - read_cpuid_id()); - while (1); + pr_err("CPU%u: configuration botched (ID %08x), CPU halted\n", + smp_processor_id(), midr); + while (1) + /* can't use cpu_relax() here as it may require MMU setup */; } + return list; +} + +static void __init setup_processor(void) +{ + unsigned int midr = read_cpuid_id(); + struct proc_info_list *list = lookup_processor(midr); + cpu_name = list->cpu_name; __cpu_architecture = __get_cpu_architecture(); -#ifdef MULTI_CPU - processor = *list->proc; -#endif + init_proc_vtable(list->proc); #ifdef MULTI_TLB cpu_tlb = *list->tlb; #endif @@ -632,7 +642,7 @@ static void __init setup_processor(void) #endif pr_info("CPU: %s [%08x] revision %d (ARMv%s), cr=%08lx\n", - cpu_name, read_cpuid_id(), read_cpuid_id() & 15, + list->cpu_name, midr, midr & 15, proc_arch[cpu_architecture()], get_cr()); snprintf(init_utsname()->machine, __NEW_UTS_LEN + 1, "%s%c", diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c index 7b8f2141427b..0a066f03b5ec 100644 --- a/arch/arm/kernel/signal.c +++ b/arch/arm/kernel/signal.c @@ -94,34 +94,34 @@ static int restore_iwmmxt_context(struct iwmmxt_sigframe *frame) static int preserve_vfp_context(struct vfp_sigframe __user *frame) { - const unsigned long magic = VFP_MAGIC; - const unsigned long size = VFP_STORAGE_SIZE; + struct vfp_sigframe kframe; int err = 0; - __put_user_error(magic, &frame->magic, err); - __put_user_error(size, &frame->size, err); + memset(&kframe, 0, sizeof(kframe)); + kframe.magic = VFP_MAGIC; + kframe.size = VFP_STORAGE_SIZE; + err = vfp_preserve_user_clear_hwstate(&kframe.ufp, &kframe.ufp_exc); if (err) - return -EFAULT; + return err; - return vfp_preserve_user_clear_hwstate(&frame->ufp, &frame->ufp_exc); + return __copy_to_user(frame, &kframe, sizeof(kframe)); } -static int restore_vfp_context(struct vfp_sigframe __user *frame) +static int restore_vfp_context(struct vfp_sigframe __user *auxp) { - unsigned long magic; - unsigned long size; - int err = 0; + struct vfp_sigframe frame; + int err; - __get_user_error(magic, &frame->magic, err); - __get_user_error(size, &frame->size, err); + err = __copy_from_user(&frame, (char __user *) auxp, sizeof(frame)); if (err) - return -EFAULT; - if (magic != VFP_MAGIC || size != VFP_STORAGE_SIZE) + return err; + + if (frame.magic != VFP_MAGIC || frame.size != VFP_STORAGE_SIZE) return -EINVAL; - return vfp_restore_user_hwstate(&frame->ufp, &frame->ufp_exc); + return vfp_restore_user_hwstate(&frame.ufp, &frame.ufp_exc); } #endif @@ -141,6 +141,7 @@ struct rt_sigframe { static int restore_sigframe(struct pt_regs *regs, struct sigframe __user *sf) { + struct sigcontext context; struct aux_sigframe __user *aux; sigset_t set; int err; @@ -149,23 +150,26 @@ static int restore_sigframe(struct pt_regs *regs, struct sigframe __user *sf) if (err == 0) set_current_blocked(&set); - __get_user_error(regs->ARM_r0, &sf->uc.uc_mcontext.arm_r0, err); - __get_user_error(regs->ARM_r1, &sf->uc.uc_mcontext.arm_r1, err); - __get_user_error(regs->ARM_r2, &sf->uc.uc_mcontext.arm_r2, err); - __get_user_error(regs->ARM_r3, &sf->uc.uc_mcontext.arm_r3, err); - __get_user_error(regs->ARM_r4, &sf->uc.uc_mcontext.arm_r4, err); - __get_user_error(regs->ARM_r5, &sf->uc.uc_mcontext.arm_r5, err); - __get_user_error(regs->ARM_r6, &sf->uc.uc_mcontext.arm_r6, err); - __get_user_error(regs->ARM_r7, &sf->uc.uc_mcontext.arm_r7, err); - __get_user_error(regs->ARM_r8, &sf->uc.uc_mcontext.arm_r8, err); - __get_user_error(regs->ARM_r9, &sf->uc.uc_mcontext.arm_r9, err); - __get_user_error(regs->ARM_r10, &sf->uc.uc_mcontext.arm_r10, err); - __get_user_error(regs->ARM_fp, &sf->uc.uc_mcontext.arm_fp, err); - __get_user_error(regs->ARM_ip, &sf->uc.uc_mcontext.arm_ip, err); - __get_user_error(regs->ARM_sp, &sf->uc.uc_mcontext.arm_sp, err); - __get_user_error(regs->ARM_lr, &sf->uc.uc_mcontext.arm_lr, err); - __get_user_error(regs->ARM_pc, &sf->uc.uc_mcontext.arm_pc, err); - __get_user_error(regs->ARM_cpsr, &sf->uc.uc_mcontext.arm_cpsr, err); + err |= __copy_from_user(&context, &sf->uc.uc_mcontext, sizeof(context)); + if (err == 0) { + regs->ARM_r0 = context.arm_r0; + regs->ARM_r1 = context.arm_r1; + regs->ARM_r2 = context.arm_r2; + regs->ARM_r3 = context.arm_r3; + regs->ARM_r4 = context.arm_r4; + regs->ARM_r5 = context.arm_r5; + regs->ARM_r6 = context.arm_r6; + regs->ARM_r7 = context.arm_r7; + regs->ARM_r8 = context.arm_r8; + regs->ARM_r9 = context.arm_r9; + regs->ARM_r10 = context.arm_r10; + regs->ARM_fp = context.arm_fp; + regs->ARM_ip = context.arm_ip; + regs->ARM_sp = context.arm_sp; + regs->ARM_lr = context.arm_lr; + regs->ARM_pc = context.arm_pc; + regs->ARM_cpsr = context.arm_cpsr; + } err |= !valid_user_regs(regs); @@ -253,30 +257,35 @@ static int setup_sigframe(struct sigframe __user *sf, struct pt_regs *regs, sigset_t *set) { struct aux_sigframe __user *aux; + struct sigcontext context; int err = 0; - __put_user_error(regs->ARM_r0, &sf->uc.uc_mcontext.arm_r0, err); - __put_user_error(regs->ARM_r1, &sf->uc.uc_mcontext.arm_r1, err); - __put_user_error(regs->ARM_r2, &sf->uc.uc_mcontext.arm_r2, err); - __put_user_error(regs->ARM_r3, &sf->uc.uc_mcontext.arm_r3, err); - __put_user_error(regs->ARM_r4, &sf->uc.uc_mcontext.arm_r4, err); - __put_user_error(regs->ARM_r5, &sf->uc.uc_mcontext.arm_r5, err); - __put_user_error(regs->ARM_r6, &sf->uc.uc_mcontext.arm_r6, err); - __put_user_error(regs->ARM_r7, &sf->uc.uc_mcontext.arm_r7, err); - __put_user_error(regs->ARM_r8, &sf->uc.uc_mcontext.arm_r8, err); - __put_user_error(regs->ARM_r9, &sf->uc.uc_mcontext.arm_r9, err); - __put_user_error(regs->ARM_r10, &sf->uc.uc_mcontext.arm_r10, err); - __put_user_error(regs->ARM_fp, &sf->uc.uc_mcontext.arm_fp, err); - __put_user_error(regs->ARM_ip, &sf->uc.uc_mcontext.arm_ip, err); - __put_user_error(regs->ARM_sp, &sf->uc.uc_mcontext.arm_sp, err); - __put_user_error(regs->ARM_lr, &sf->uc.uc_mcontext.arm_lr, err); - __put_user_error(regs->ARM_pc, &sf->uc.uc_mcontext.arm_pc, err); - __put_user_error(regs->ARM_cpsr, &sf->uc.uc_mcontext.arm_cpsr, err); - - __put_user_error(current->thread.trap_no, &sf->uc.uc_mcontext.trap_no, err); - __put_user_error(current->thread.error_code, &sf->uc.uc_mcontext.error_code, err); - __put_user_error(current->thread.address, &sf->uc.uc_mcontext.fault_address, err); - __put_user_error(set->sig[0], &sf->uc.uc_mcontext.oldmask, err); + context = (struct sigcontext) { + .arm_r0 = regs->ARM_r0, + .arm_r1 = regs->ARM_r1, + .arm_r2 = regs->ARM_r2, + .arm_r3 = regs->ARM_r3, + .arm_r4 = regs->ARM_r4, + .arm_r5 = regs->ARM_r5, + .arm_r6 = regs->ARM_r6, + .arm_r7 = regs->ARM_r7, + .arm_r8 = regs->ARM_r8, + .arm_r9 = regs->ARM_r9, + .arm_r10 = regs->ARM_r10, + .arm_fp = regs->ARM_fp, + .arm_ip = regs->ARM_ip, + .arm_sp = regs->ARM_sp, + .arm_lr = regs->ARM_lr, + .arm_pc = regs->ARM_pc, + .arm_cpsr = regs->ARM_cpsr, + + .trap_no = current->thread.trap_no, + .error_code = current->thread.error_code, + .fault_address = current->thread.address, + .oldmask = set->sig[0], + }; + + err |= __copy_to_user(&sf->uc.uc_mcontext, &context, sizeof(context)); err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(*set)); @@ -293,7 +302,7 @@ setup_sigframe(struct sigframe __user *sf, struct pt_regs *regs, sigset_t *set) if (err == 0) err |= preserve_vfp_context(&aux->vfp); #endif - __put_user_error(0, &aux->end_magic, err); + err |= __put_user(0, &aux->end_magic); return err; } @@ -425,7 +434,7 @@ setup_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs) /* * Set uc.uc_flags to a value which sc.trap_no would never have. */ - __put_user_error(0x5ac3c35a, &frame->uc.uc_flags, err); + err = __put_user(0x5ac3c35a, &frame->uc.uc_flags); err |= setup_sigframe(frame, regs, set); if (err == 0) @@ -445,8 +454,8 @@ setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs) err |= copy_siginfo_to_user(&frame->info, &ksig->info); - __put_user_error(0, &frame->sig.uc.uc_flags, err); - __put_user_error(NULL, &frame->sig.uc.uc_link, err); + err |= __put_user(0, &frame->sig.uc.uc_flags); + err |= __put_user(NULL, &frame->sig.uc.uc_link); err |= __save_altstack(&frame->sig.uc.uc_stack, regs->ARM_sp); err |= setup_sigframe(&frame->sig, regs, set); diff --git a/arch/arm/kernel/sleep.S b/arch/arm/kernel/sleep.S index 0f6c1000582c..c8569390e7e7 100644 --- a/arch/arm/kernel/sleep.S +++ b/arch/arm/kernel/sleep.S @@ -119,6 +119,14 @@ ENDPROC(cpu_resume_after_mmu) .text .align +#ifdef CONFIG_MCPM + .arm +THUMB( .thumb ) +ENTRY(cpu_resume_no_hyp) +ARM_BE8(setend be) @ ensure we are in BE mode + b no_hyp +#endif + #ifdef CONFIG_MMU .arm ENTRY(cpu_resume_arm) @@ -134,6 +142,7 @@ ARM_BE8(setend be) @ ensure we are in BE mode bl __hyp_stub_install_secondary #endif safe_svcmode_maskall r1 +no_hyp: mov r1, #0 ALT_SMP(mrc p15, 0, r0, c0, c0, 5) ALT_UP_B(1f) @@ -163,6 +172,9 @@ ENDPROC(cpu_resume) #ifdef CONFIG_MMU ENDPROC(cpu_resume_arm) #endif +#ifdef CONFIG_MCPM +ENDPROC(cpu_resume_no_hyp) +#endif .align 2 _sleep_save_sp: diff --git a/arch/arm/kernel/smccc-call.S b/arch/arm/kernel/smccc-call.S new file mode 100644 index 000000000000..2e48b674aab1 --- /dev/null +++ b/arch/arm/kernel/smccc-call.S @@ -0,0 +1,62 @@ +/* + * Copyright (c) 2015, Linaro Limited + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ +#include <linux/linkage.h> + +#include <asm/opcodes-sec.h> +#include <asm/opcodes-virt.h> +#include <asm/unwind.h> + + /* + * Wrap c macros in asm macros to delay expansion until after the + * SMCCC asm macro is expanded. + */ + .macro SMCCC_SMC + __SMC(0) + .endm + + .macro SMCCC_HVC + __HVC(0) + .endm + + .macro SMCCC instr +UNWIND( .fnstart) + mov r12, sp + push {r4-r7} +UNWIND( .save {r4-r7}) + ldm r12, {r4-r7} + \instr + pop {r4-r7} + ldr r12, [sp, #(4 * 4)] + stm r12, {r0-r3} + bx lr +UNWIND( .fnend) + .endm + +/* + * void smccc_smc(unsigned long a0, unsigned long a1, unsigned long a2, + * unsigned long a3, unsigned long a4, unsigned long a5, + * unsigned long a6, unsigned long a7, struct arm_smccc_res *res) + */ +ENTRY(arm_smccc_smc) + SMCCC SMCCC_SMC +ENDPROC(arm_smccc_smc) + +/* + * void smccc_hvc(unsigned long a0, unsigned long a1, unsigned long a2, + * unsigned long a3, unsigned long a4, unsigned long a5, + * unsigned long a6, unsigned long a7, struct arm_smccc_res *res) + */ +ENTRY(arm_smccc_hvc) + SMCCC SMCCC_HVC +ENDPROC(arm_smccc_hvc) diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index 08ce9e36dc5a..d2033d09125f 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -27,8 +27,10 @@ #include <linux/completion.h> #include <linux/cpufreq.h> #include <linux/irq_work.h> +#include <linux/slab.h> #include <linux/atomic.h> +#include <asm/bugs.h> #include <asm/smp.h> #include <asm/cacheflush.h> #include <asm/cpu.h> @@ -39,6 +41,7 @@ #include <asm/mmu_context.h> #include <asm/pgtable.h> #include <asm/pgalloc.h> +#include <asm/procinfo.h> #include <asm/processor.h> #include <asm/sections.h> #include <asm/tlbflush.h> @@ -95,6 +98,30 @@ static unsigned long get_arch_pgd(pgd_t *pgd) #endif } +#if defined(CONFIG_BIG_LITTLE) && defined(CONFIG_HARDEN_BRANCH_PREDICTOR) +static int secondary_biglittle_prepare(unsigned int cpu) +{ + if (!cpu_vtable[cpu]) + cpu_vtable[cpu] = kzalloc(sizeof(*cpu_vtable[cpu]), GFP_KERNEL); + + return cpu_vtable[cpu] ? 0 : -ENOMEM; +} + +static void secondary_biglittle_init(void) +{ + init_proc_vtable(lookup_processor(read_cpuid_id())->proc); +} +#else +static int secondary_biglittle_prepare(unsigned int cpu) +{ + return 0; +} + +static void secondary_biglittle_init(void) +{ +} +#endif + int __cpu_up(unsigned int cpu, struct task_struct *idle) { int ret; @@ -102,6 +129,10 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle) if (!smp_ops.smp_boot_secondary) return -ENOSYS; + ret = secondary_biglittle_prepare(cpu); + if (ret) + return ret; + /* * We need to tell the secondary core where to find * its stack and the page tables. @@ -353,6 +384,8 @@ asmlinkage void secondary_start_kernel(void) struct mm_struct *mm = &init_mm; unsigned int cpu; + secondary_biglittle_init(); + /* * The identity mapping is uncached (strongly ordered), so * switch away from it before attempting any exclusive accesses. @@ -396,6 +429,9 @@ asmlinkage void secondary_start_kernel(void) * before we continue - which happens after __cpu_up returns. */ set_cpu_online(cpu, true); + + check_other_bugs(); + complete(&cpu_running); local_irq_enable(); @@ -563,8 +599,10 @@ static void ipi_cpu_stop(unsigned int cpu) local_fiq_disable(); local_irq_disable(); - while (1) + while (1) { cpu_relax(); + wfe(); + } } static DEFINE_PER_CPU(struct completion *, cpu_completion); diff --git a/arch/arm/kernel/suspend.c b/arch/arm/kernel/suspend.c index 9a2f882a0a2d..134f0d432610 100644 --- a/arch/arm/kernel/suspend.c +++ b/arch/arm/kernel/suspend.c @@ -1,6 +1,7 @@ #include <linux/init.h> #include <linux/slab.h> +#include <asm/bugs.h> #include <asm/cacheflush.h> #include <asm/idmap.h> #include <asm/pgalloc.h> @@ -34,6 +35,7 @@ int cpu_suspend(unsigned long arg, int (*fn)(unsigned long)) cpu_switch_mm(mm->pgd, mm); local_flush_bp_all(); local_flush_tlb_all(); + check_other_bugs(); } return ret; diff --git a/arch/arm/kernel/sys_oabi-compat.c b/arch/arm/kernel/sys_oabi-compat.c index 5f221acd21ae..d844c5c9364b 100644 --- a/arch/arm/kernel/sys_oabi-compat.c +++ b/arch/arm/kernel/sys_oabi-compat.c @@ -276,6 +276,7 @@ asmlinkage long sys_oabi_epoll_wait(int epfd, int maxevents, int timeout) { struct epoll_event *kbuf; + struct oabi_epoll_event e; mm_segment_t fs; long ret, err, i; @@ -294,8 +295,11 @@ asmlinkage long sys_oabi_epoll_wait(int epfd, set_fs(fs); err = 0; for (i = 0; i < ret; i++) { - __put_user_error(kbuf[i].events, &events->events, err); - __put_user_error(kbuf[i].data, &events->data, err); + e.events = kbuf[i].events; + e.data = kbuf[i].data; + err = __copy_to_user(events, &e, sizeof(e)); + if (err) + break; events++; } kfree(kbuf); @@ -328,9 +332,11 @@ asmlinkage long sys_oabi_semtimedop(int semid, return -ENOMEM; err = 0; for (i = 0; i < nsops; i++) { - __get_user_error(sops[i].sem_num, &tsops->sem_num, err); - __get_user_error(sops[i].sem_op, &tsops->sem_op, err); - __get_user_error(sops[i].sem_flg, &tsops->sem_flg, err); + struct oabi_sembuf osb; + err |= __copy_from_user(&osb, tsops, sizeof(osb)); + sops[i].sem_num = osb.sem_num; + sops[i].sem_op = osb.sem_op; + sops[i].sem_flg = osb.sem_flg; tsops++; } if (timeout) { diff --git a/arch/arm/kernel/unwind.c b/arch/arm/kernel/unwind.c index 0bee233fef9a..314cfb232a63 100644 --- a/arch/arm/kernel/unwind.c +++ b/arch/arm/kernel/unwind.c @@ -93,7 +93,7 @@ extern const struct unwind_idx __start_unwind_idx[]; static const struct unwind_idx *__origin_unwind_idx; extern const struct unwind_idx __stop_unwind_idx[]; -static DEFINE_SPINLOCK(unwind_lock); +static DEFINE_RAW_SPINLOCK(unwind_lock); static LIST_HEAD(unwind_tables); /* Convert a prel31 symbol to an absolute address */ @@ -201,7 +201,7 @@ static const struct unwind_idx *unwind_find_idx(unsigned long addr) /* module unwind tables */ struct unwind_table *table; - spin_lock_irqsave(&unwind_lock, flags); + raw_spin_lock_irqsave(&unwind_lock, flags); list_for_each_entry(table, &unwind_tables, list) { if (addr >= table->begin_addr && addr < table->end_addr) { @@ -213,7 +213,7 @@ static const struct unwind_idx *unwind_find_idx(unsigned long addr) break; } } - spin_unlock_irqrestore(&unwind_lock, flags); + raw_spin_unlock_irqrestore(&unwind_lock, flags); } pr_debug("%s: idx = %p\n", __func__, idx); @@ -529,9 +529,9 @@ struct unwind_table *unwind_table_add(unsigned long start, unsigned long size, tab->begin_addr = text_addr; tab->end_addr = text_addr + text_size; - spin_lock_irqsave(&unwind_lock, flags); + raw_spin_lock_irqsave(&unwind_lock, flags); list_add_tail(&tab->list, &unwind_tables); - spin_unlock_irqrestore(&unwind_lock, flags); + raw_spin_unlock_irqrestore(&unwind_lock, flags); return tab; } @@ -543,9 +543,9 @@ void unwind_table_del(struct unwind_table *tab) if (!tab) return; - spin_lock_irqsave(&unwind_lock, flags); + raw_spin_lock_irqsave(&unwind_lock, flags); list_del(&tab->list); - spin_unlock_irqrestore(&unwind_lock, flags); + raw_spin_unlock_irqrestore(&unwind_lock, flags); kfree(tab); } |