diff options
Diffstat (limited to 'arch')
47 files changed, 418 insertions, 179 deletions
diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug index 6342f9da4545..3a8ce31a2ae6 100644 --- a/arch/powerpc/Kconfig.debug +++ b/arch/powerpc/Kconfig.debug @@ -85,6 +85,10 @@ config MSI_BITMAP_SELFTEST config PPC_IRQ_SOFT_MASK_DEBUG bool "Include extra checks for powerpc irq soft masking" +config PPC_RFI_SRR_DEBUG + bool "Include extra checks for RFI SRR register validity" + depends on PPC_BOOK3S_64 + config XMON bool "Include xmon kernel debugger" depends on DEBUG_KERNEL diff --git a/arch/powerpc/include/asm/hw_irq.h b/arch/powerpc/include/asm/hw_irq.h index 56a98936a6a9..19bcef666cf6 100644 --- a/arch/powerpc/include/asm/hw_irq.h +++ b/arch/powerpc/include/asm/hw_irq.h @@ -389,7 +389,15 @@ static inline bool arch_irq_disabled_regs(struct pt_regs *regs) return !(regs->msr & MSR_EE); } -static inline void may_hard_irq_enable(void) { } +static inline bool may_hard_irq_enable(void) +{ + return false; +} + +static inline void do_hard_irq_enable(void) +{ + BUILD_BUG(); +} static inline void irq_soft_mask_regs_set_state(struct pt_regs *regs, unsigned long val) { diff --git a/arch/powerpc/include/asm/interrupt.h b/arch/powerpc/include/asm/interrupt.h index 59f704408d65..de36fb5d9c51 100644 --- a/arch/powerpc/include/asm/interrupt.h +++ b/arch/powerpc/include/asm/interrupt.h @@ -73,13 +73,25 @@ #include <asm/kprobes.h> #include <asm/runlatch.h> +#ifdef CONFIG_PPC_BOOK3S_64 +static inline void srr_regs_clobbered(void) +{ + local_paca->srr_valid = 0; + local_paca->hsrr_valid = 0; +} +#else +static inline void srr_regs_clobbered(void) +{ +} +#endif + static inline void nap_adjust_return(struct pt_regs *regs) { #ifdef CONFIG_PPC_970_NAP if (unlikely(test_thread_local_flags(_TLF_NAPPING))) { /* Can avoid a test-and-clear because NMIs do not call this */ clear_thread_local_flags(_TLF_NAPPING); - regs->nip = (unsigned long)power4_idle_nap_return; + regs_set_return_ip(regs, (unsigned long)power4_idle_nap_return); } #endif } diff --git a/arch/powerpc/include/asm/livepatch.h b/arch/powerpc/include/asm/livepatch.h index ae25e6e72997..4fe018cc207b 100644 --- a/arch/powerpc/include/asm/livepatch.h +++ b/arch/powerpc/include/asm/livepatch.h @@ -16,7 +16,7 @@ static inline void klp_arch_set_pc(struct ftrace_regs *fregs, unsigned long ip) { struct pt_regs *regs = ftrace_get_regs(fregs); - regs->nip = ip; + regs_set_return_ip(regs, ip); } #define klp_get_ftrace_location klp_get_ftrace_location diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h index ecc8d792a431..f5f0f3408047 100644 --- a/arch/powerpc/include/asm/paca.h +++ b/arch/powerpc/include/asm/paca.h @@ -168,6 +168,10 @@ struct paca_struct { #ifdef CONFIG_PPC_BOOK3E u16 trap_save; /* Used when bad stack is encountered */ #endif +#ifdef CONFIG_PPC_BOOK3S_64 + u8 hsrr_valid; /* HSRRs set for HRFID */ + u8 srr_valid; /* SRRs set for RFID */ +#endif u8 irq_soft_mask; /* mask for irq soft masking */ u8 irq_happened; /* irq happened while soft-disabled */ u8 irq_work_pending; /* IRQ_WORK interrupt while soft-disable */ diff --git a/arch/powerpc/include/asm/probes.h b/arch/powerpc/include/asm/probes.h index 84dd1addd434..c5d984700d24 100644 --- a/arch/powerpc/include/asm/probes.h +++ b/arch/powerpc/include/asm/probes.h @@ -34,14 +34,14 @@ typedef u32 ppc_opcode_t; /* Enable single stepping for the current task */ static inline void enable_single_step(struct pt_regs *regs) { - regs->msr |= MSR_SINGLESTEP; + regs_set_return_msr(regs, regs->msr | MSR_SINGLESTEP); #ifdef CONFIG_PPC_ADV_DEBUG_REGS /* * We turn off Critical Input Exception(CE) to ensure that the single * step will be for the instruction we have the probe on; if we don't, * it is possible we'd get the single step reported for CE. */ - regs->msr &= ~MSR_CE; + regs_set_return_msr(regs, regs->msr & ~MSR_CE); mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM); #ifdef CONFIG_PPC_47x isync(); diff --git a/arch/powerpc/include/asm/ptrace.h b/arch/powerpc/include/asm/ptrace.h index e06d61b668d4..5d69dafd80ad 100644 --- a/arch/powerpc/include/asm/ptrace.h +++ b/arch/powerpc/include/asm/ptrace.h @@ -123,6 +123,47 @@ struct pt_regs #endif /* __powerpc64__ */ #ifndef __ASSEMBLY__ +#include <asm/paca.h> + +#ifdef CONFIG_SMP +extern unsigned long profile_pc(struct pt_regs *regs); +#else +#define profile_pc(regs) instruction_pointer(regs) +#endif + +long do_syscall_trace_enter(struct pt_regs *regs); +void do_syscall_trace_leave(struct pt_regs *regs); + +static inline void regs_set_return_ip(struct pt_regs *regs, unsigned long ip) +{ + regs->nip = ip; +#ifdef CONFIG_PPC_BOOK3S_64 + local_paca->hsrr_valid = 0; + local_paca->srr_valid = 0; +#endif +} + +static inline void regs_set_return_msr(struct pt_regs *regs, unsigned long msr) +{ + regs->msr = msr; +#ifdef CONFIG_PPC_BOOK3S_64 + local_paca->hsrr_valid = 0; + local_paca->srr_valid = 0; +#endif +} + +static inline void set_return_regs_changed(void) +{ +#ifdef CONFIG_PPC_BOOK3S_64 + local_paca->hsrr_valid = 0; + local_paca->srr_valid = 0; +#endif +} + +static inline void regs_add_return_ip(struct pt_regs *regs, long offset) +{ + regs_set_return_ip(regs, regs->nip + offset); +} static inline unsigned long instruction_pointer(struct pt_regs *regs) { @@ -132,7 +173,7 @@ static inline unsigned long instruction_pointer(struct pt_regs *regs) static inline void instruction_pointer_set(struct pt_regs *regs, unsigned long val) { - regs->nip = val; + regs_set_return_ip(regs, val); } static inline unsigned long user_stack_pointer(struct pt_regs *regs) @@ -145,15 +186,6 @@ static inline unsigned long frame_pointer(struct pt_regs *regs) return 0; } -#ifdef CONFIG_SMP -extern unsigned long profile_pc(struct pt_regs *regs); -#else -#define profile_pc(regs) instruction_pointer(regs) -#endif - -long do_syscall_trace_enter(struct pt_regs *regs); -void do_syscall_trace_leave(struct pt_regs *regs); - #ifdef __powerpc64__ #define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1) #else diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index 31881ef3641d..69a2885adfe9 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -190,6 +190,10 @@ int main(void) OFFSET(PACATOC, paca_struct, kernel_toc); OFFSET(PACAKBASE, paca_struct, kernelbase); OFFSET(PACAKMSR, paca_struct, kernel_msr); +#ifdef CONFIG_PPC_BOOK3S_64 + OFFSET(PACAHSRR_VALID, paca_struct, hsrr_valid); + OFFSET(PACASRR_VALID, paca_struct, srr_valid); +#endif OFFSET(PACAIRQSOFTMASK, paca_struct, irq_soft_mask); OFFSET(PACAIRQHAPPENED, paca_struct, irq_happened); OFFSET(PACA_FTRACE_ENABLED, paca_struct, ftrace_enabled); diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 03a45a88b4b8..9a1d5e5599d3 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -64,6 +64,30 @@ exception_marker: .section ".text" .align 7 +.macro DEBUG_SRR_VALID srr +#ifdef CONFIG_PPC_RFI_SRR_DEBUG + .ifc \srr,srr + mfspr r11,SPRN_SRR0 + ld r12,_NIP(r1) +100: tdne r11,r12 + EMIT_BUG_ENTRY 100b,__FILE__,__LINE__,(BUGFLAG_WARNING | BUGFLAG_ONCE) + mfspr r11,SPRN_SRR1 + ld r12,_MSR(r1) +100: tdne r11,r12 + EMIT_BUG_ENTRY 100b,__FILE__,__LINE__,(BUGFLAG_WARNING | BUGFLAG_ONCE) + .else + mfspr r11,SPRN_HSRR0 + ld r12,_NIP(r1) +100: tdne r11,r12 + EMIT_BUG_ENTRY 100b,__FILE__,__LINE__,(BUGFLAG_WARNING | BUGFLAG_ONCE) + mfspr r11,SPRN_HSRR1 + ld r12,_MSR(r1) +100: tdne r11,r12 + EMIT_BUG_ENTRY 100b,__FILE__,__LINE__,(BUGFLAG_WARNING | BUGFLAG_ONCE) + .endif +#endif +.endm + #ifdef CONFIG_PPC_BOOK3S .macro system_call_vectored name trapnr .globl system_call_vectored_\name @@ -286,6 +310,11 @@ END_BTB_FLUSH_SECTION ld r11,exception_marker@toc(r2) std r11,-16(r10) /* "regshere" marker */ +#ifdef CONFIG_PPC_BOOK3S + li r11,1 + stb r11,PACASRR_VALID(r13) +#endif + /* * We always enter kernel from userspace with irq soft-mask enabled and * nothing pending. system_call_exception() will call @@ -306,18 +335,27 @@ END_BTB_FLUSH_SECTION bl syscall_exit_prepare ld r2,_CCR(r1) + ld r6,_LINK(r1) + mtlr r6 + +#ifdef CONFIG_PPC_BOOK3S + lbz r4,PACASRR_VALID(r13) + cmpdi r4,0 + bne 1f + li r4,0 + stb r4,PACASRR_VALID(r13) +#endif ld r4,_NIP(r1) ld r5,_MSR(r1) - ld r6,_LINK(r1) + mtspr SPRN_SRR0,r4 + mtspr SPRN_SRR1,r5 +1: + DEBUG_SRR_VALID srr BEGIN_FTR_SECTION stdcx. r0,0,r1 /* to clear the reservation */ END_FTR_SECTION_IFCLR(CPU_FTR_STCX_CHECKS_ADDRESS) - mtspr SPRN_SRR0,r4 - mtspr SPRN_SRR1,r5 - mtlr r6 - cmpdi r3,0 bne .Lsyscall_restore_regs /* Zero volatile regs that may contain sensitive kernel data */ @@ -673,19 +711,40 @@ _ASM_NOKPROBE_SYMBOL(interrupt_return_\srr\()) kuap_user_restore r3, r4 #endif .Lfast_user_interrupt_return_\srr\(): - ld r11,_NIP(r1) - ld r12,_MSR(r1) + BEGIN_FTR_SECTION ld r10,_PPR(r1) mtspr SPRN_PPR,r10 END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR) + +#ifdef CONFIG_PPC_BOOK3S + .ifc \srr,srr + lbz r4,PACASRR_VALID(r13) + .else + lbz r4,PACAHSRR_VALID(r13) + .endif + cmpdi r4,0 + li r4,0 + bne 1f +#endif + ld r11,_NIP(r1) + ld r12,_MSR(r1) .ifc \srr,srr mtspr SPRN_SRR0,r11 mtspr SPRN_SRR1,r12 +1: +#ifdef CONFIG_PPC_BOOK3S + stb r4,PACASRR_VALID(r13) +#endif .else mtspr SPRN_HSRR0,r11 mtspr SPRN_HSRR1,r12 +1: +#ifdef CONFIG_PPC_BOOK3S + stb r4,PACAHSRR_VALID(r13) +#endif .endif + DEBUG_SRR_VALID \srr BEGIN_FTR_SECTION stdcx. r0,0,r1 /* to clear the reservation */ @@ -730,15 +789,34 @@ ALT_FTR_SECTION_END_IFCLR(CPU_FTR_STCX_CHECKS_ADDRESS) .Lfast_kernel_interrupt_return_\srr\(): cmpdi cr1,r3,0 +#ifdef CONFIG_PPC_BOOK3S + .ifc \srr,srr + lbz r4,PACASRR_VALID(r13) + .else + lbz r4,PACAHSRR_VALID(r13) + .endif + cmpdi r4,0 + li r4,0 + bne 1f +#endif ld r11,_NIP(r1) ld r12,_MSR(r1) .ifc \srr,srr mtspr SPRN_SRR0,r11 mtspr SPRN_SRR1,r12 +1: +#ifdef CONFIG_PPC_BOOK3S + stb r4,PACASRR_VALID(r13) +#endif .else mtspr SPRN_HSRR0,r11 mtspr SPRN_HSRR1,r12 +1: +#ifdef CONFIG_PPC_BOOK3S + stb r4,PACAHSRR_VALID(r13) +#endif .endif + DEBUG_SRR_VALID \srr BEGIN_FTR_SECTION stdcx. r0,0,r1 /* to clear the reservation */ diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index 1bc27af1b425..3d238a3b2a24 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -485,6 +485,20 @@ DEFINE_FIXED_SYMBOL(\name\()_common_real) std r0,GPR0(r1) /* save r0 in stackframe */ std r10,GPR1(r1) /* save r1 in stackframe */ + /* Mark our [H]SRRs valid for return */ + li r10,1 + .if IHSRR_IF_HVMODE + BEGIN_FTR_SECTION + stb r10,PACAHSRR_VALID(r13) + FTR_SECTION_ELSE + stb r10,PACASRR_VALID(r13) + ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_206) + .elseif IHSRR + stb r10,PACAHSRR_VALID(r13) + .else + stb r10,PACASRR_VALID(r13) + .endif + .if ISET_RI li r10,MSR_RI mtmsrd r10,1 /* Set MSR_RI */ @@ -584,10 +598,13 @@ END_FTR_SECTION_IFSET(CPU_FTR_CFAR) .macro EXCEPTION_RESTORE_REGS hsrr=0 /* Move original SRR0 and SRR1 into the respective regs */ ld r9,_MSR(r1) + li r10,0 .if \hsrr mtspr SPRN_HSRR1,r9 + stb r10,PACAHSRR_VALID(r13) .else mtspr SPRN_SRR1,r9 + stb r10,PACASRR_VALID(r13) .endif ld r9,_NIP(r1) .if \hsrr @@ -1718,6 +1735,8 @@ EXC_COMMON_BEGIN(hdecrementer_common) * * Be careful to avoid touching the kernel stack. */ + li r10,0 + stb r10,PACAHSRR_VALID(r13) ld r10,PACA_EXGEN+EX_CTR(r13) mtctr r10 mtcrf 0x80,r9 @@ -2513,6 +2532,8 @@ BEGIN_FTR_SECTION ld r10,PACA_EXGEN+EX_CFAR(r13) mtspr SPRN_CFAR,r10 END_FTR_SECTION_IFSET(CPU_FTR_CFAR) + li r10,0 + stb r10,PACAHSRR_VALID(r13) ld r10,PACA_EXGEN+EX_R10(r13) ld r11,PACA_EXGEN+EX_R11(r13) ld r12,PACA_EXGEN+EX_R12(r13) @@ -2673,6 +2694,12 @@ masked_interrupt: ori r11,r11,PACA_IRQ_HARD_DIS stb r11,PACAIRQHAPPENED(r13) 2: /* done */ + li r10,0 + .if \hsrr + stb r10,PACAHSRR_VALID(r13) + .else + stb r10,PACASRR_VALID(r13) + .endif ld r10,PACA_EXGEN+EX_CTR(r13) mtctr r10 mtcrf 0x80,r9 diff --git a/arch/powerpc/kernel/fpu.S b/arch/powerpc/kernel/fpu.S index 2c57ece6671c..6010adcee16e 100644 --- a/arch/powerpc/kernel/fpu.S +++ b/arch/powerpc/kernel/fpu.S @@ -103,6 +103,10 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX) ori r12,r12,MSR_FP or r12,r12,r4 std r12,_MSR(r1) +#ifdef CONFIG_PPC_BOOK3S_64 + li r4,0 + stb r4,PACASRR_VALID(r13) +#endif #endif li r4,1 stb r4,THREAD_LOAD_FP(r5) diff --git a/arch/powerpc/kernel/hw_breakpoint.c b/arch/powerpc/kernel/hw_breakpoint.c index 8fc7a14e4d71..21a638aff72f 100644 --- a/arch/powerpc/kernel/hw_breakpoint.c +++ b/arch/powerpc/kernel/hw_breakpoint.c @@ -486,7 +486,7 @@ void thread_change_pc(struct task_struct *tsk, struct pt_regs *regs) return; reset: - regs->msr &= ~MSR_SE; + regs_set_return_msr(regs, regs->msr & ~MSR_SE); for (i = 0; i < nr_wp_slots(); i++) { info = counter_arch_bp(__this_cpu_read(bp_per_reg[i])); __set_breakpoint(i, info); @@ -537,7 +537,7 @@ static bool stepping_handler(struct pt_regs *regs, struct perf_event **bp, current->thread.last_hit_ubp[i] = bp[i]; info[i] = NULL; } - regs->msr |= MSR_SE; + regs_set_return_msr(regs, regs->msr | MSR_SE); return false; } diff --git a/arch/powerpc/kernel/kgdb.c b/arch/powerpc/kernel/kgdb.c index c48565762698..bdee7262c080 100644 --- a/arch/powerpc/kernel/kgdb.c +++ b/arch/powerpc/kernel/kgdb.c @@ -147,7 +147,7 @@ static int kgdb_handle_breakpoint(struct pt_regs *regs) return 0; if (*(u32 *)regs->nip == BREAK_INSTR) - regs->nip += BREAK_INSTR_SIZE; + regs_add_return_ip(regs, BREAK_INSTR_SIZE); return 1; } @@ -372,7 +372,7 @@ int dbg_set_reg(int regno, void *mem, struct pt_regs *regs) void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long pc) { - regs->nip = pc; + regs_set_return_ip(regs, pc); } /* @@ -394,7 +394,7 @@ int kgdb_arch_handle_exception(int vector, int signo, int err_code, case 'c': /* handle the optional parameter */ if (kgdb_hex2long(&ptr, &addr)) - linux_regs->nip = addr; + regs_set_return_ip(linux_regs, addr); atomic_set(&kgdb_cpu_doing_single_step, -1); /* set the trace bit if we're stepping */ @@ -402,9 +402,9 @@ int kgdb_arch_handle_exception(int vector, int signo, int err_code, #ifdef CONFIG_PPC_ADV_DEBUG_REGS mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM); - linux_regs->msr |= MSR_DE; + regs_set_return_msr(linux_regs, linux_regs->msr | MSR_DE); #else - linux_regs->msr |= MSR_SE; + regs_set_return_msr(linux_regs, linux_regs->msr | MSR_SE); #endif atomic_set(&kgdb_cpu_doing_single_step, raw_smp_processor_id()); diff --git a/arch/powerpc/kernel/kprobes-ftrace.c b/arch/powerpc/kernel/kprobes-ftrace.c index 660138f6c4b2..7154d58338cc 100644 --- a/arch/powerpc/kernel/kprobes-ftrace.c +++ b/arch/powerpc/kernel/kprobes-ftrace.c @@ -39,7 +39,7 @@ void kprobe_ftrace_handler(unsigned long nip, unsigned long parent_nip, * On powerpc, NIP is *before* this instruction for the * pre handler */ - regs->nip -= MCOUNT_INSN_SIZE; + regs_add_return_ip(regs, -MCOUNT_INSN_SIZE); __this_cpu_write(current_kprobe, p); kcb->kprobe_status = KPROBE_HIT_ACTIVE; @@ -48,7 +48,7 @@ void kprobe_ftrace_handler(unsigned long nip, unsigned long parent_nip, * Emulate singlestep (and also recover regs->nip) * as if there is a nop */ - regs->nip += MCOUNT_INSN_SIZE; + regs_add_return_ip(regs, MCOUNT_INSN_SIZE); if (unlikely(p->post_handler)) { kcb->kprobe_status = KPROBE_HIT_SSDONE; p->post_handler(p, regs, 0); diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c index 8ac248cb518a..04714895d3f9 100644 --- a/arch/powerpc/kernel/kprobes.c +++ b/arch/powerpc/kernel/kprobes.c @@ -194,7 +194,7 @@ static nokprobe_inline void prepare_singlestep(struct kprobe *p, struct pt_regs * variant as values in regs could play a part in * if the trap is taken or not */ - regs->nip = (unsigned long)p->ainsn.insn; + regs_set_return_ip(regs, (unsigned long)p->ainsn.insn); } static nokprobe_inline void save_previous_kprobe(struct kprobe_ctlblk *kcb) @@ -335,8 +335,9 @@ int kprobe_handler(struct pt_regs *regs) kprobe_opcode_t insn = *p->ainsn.insn; if (kcb->kprobe_status == KPROBE_HIT_SS && is_trap(insn)) { /* Turn off 'trace' bits */ - regs->msr &= ~MSR_SINGLESTEP; - regs->msr |= kcb->kprobe_saved_msr; + regs_set_return_msr(regs, + (regs->msr & ~MSR_SINGLESTEP) | + kcb->kprobe_saved_msr); goto no_kprobe; } @@ -431,7 +432,7 @@ static int trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs) * we end up emulating it in kprobe_handler(), which increments the nip * again. */ - regs->nip = orig_ret_address - 4; + regs_set_return_ip(regs, orig_ret_address - 4); regs->link = orig_ret_address; return 0; @@ -466,8 +467,8 @@ int kprobe_post_handler(struct pt_regs *regs) } /* Adjust nip to after the single-stepped instruction */ - regs->nip = (unsigned long)cur->addr + len; - regs->msr |= kcb->kprobe_saved_msr; + regs_set_return_ip(regs, (unsigned long)cur->addr + len); + regs_set_return_msr(regs, regs->msr | kcb->kprobe_saved_msr); /*Restore back the original saved kprobes variables and continue. */ if (kcb->kprobe_status == KPROBE_REENTER) { @@ -506,9 +507,11 @@ int kprobe_fault_handler(struct pt_regs *regs, int trapnr) * and allow the page fault handler to continue as a * normal page fault. */ - regs->nip = (unsigned long)cur->addr; - regs->msr &= ~MSR_SINGLESTEP; /* Turn off 'trace' bits */ - regs->msr |= kcb->kprobe_saved_msr; + regs_set_return_ip(regs, (unsigned long)cur->addr); + /* Turn off 'trace' bits */ + regs_set_return_msr(regs, + (regs->msr & ~MSR_SINGLESTEP) | + kcb->kprobe_saved_msr); if (kcb->kprobe_status == KPROBE_REENTER) restore_previous_kprobe(kcb); else @@ -539,7 +542,7 @@ int kprobe_fault_handler(struct pt_regs *regs, int trapnr) * zero, try to fix up. */ if ((entry = search_exception_tables(regs->nip)) != NULL) { - regs->nip = extable_fixup(entry); + regs_set_return_ip(regs, extable_fixup(entry)); return 1; } diff --git a/arch/powerpc/kernel/mce.c b/arch/powerpc/kernel/mce.c index 9a3c2a84a2ac..f4b922a1e6ad 100644 --- a/arch/powerpc/kernel/mce.c +++ b/arch/powerpc/kernel/mce.c @@ -273,7 +273,7 @@ void mce_common_process_ue(struct pt_regs *regs, entry = search_kernel_exception_table(regs->nip); if (entry) { mce_err->ignore_event = true; - regs->nip = extable_fixup(entry); + regs_set_return_ip(regs, extable_fixup(entry)); } } diff --git a/arch/powerpc/kernel/optprobes.c b/arch/powerpc/kernel/optprobes.c index 2b8fe40069ad..8b9f82dc6ece 100644 --- a/arch/powerpc/kernel/optprobes.c +++ b/arch/powerpc/kernel/optprobes.c @@ -106,7 +106,7 @@ static void optimized_callback(struct optimized_kprobe *op, kprobes_inc_nmissed_count(&op->kp); } else { __this_cpu_write(current_kprobe, &op->kp); - regs->nip = (unsigned long)op->kp.addr; + regs_set_return_ip(regs, (unsigned long)op->kp.addr); get_kprobe_ctlblk()->kprobe_status = KPROBE_HIT_ACTIVE; opt_pre_handler(&op->kp, regs); __this_cpu_write(current_kprobe, NULL); diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 4e593fc2c66d..8ab1bfdfd31a 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -96,7 +96,8 @@ static void check_if_tm_restore_required(struct task_struct *tsk) if (tsk == current && tsk->thread.regs && MSR_TM_ACTIVE(tsk->thread.regs->msr) && !test_thread_flag(TIF_RESTORE_TM)) { - tsk->thread.ckpt_regs.msr = tsk->thread.regs->msr; + regs_set_return_msr(&tsk->thread.ckpt_regs, + tsk->thread.regs->msr); set_thread_flag(TIF_RESTORE_TM); } } @@ -161,7 +162,7 @@ static void __giveup_fpu(struct task_struct *tsk) msr &= ~(MSR_FP|MSR_FE0|MSR_FE1); if (cpu_has_feature(CPU_FTR_VSX)) msr &= ~MSR_VSX; - tsk->thread.regs->msr = msr; + regs_set_return_msr(tsk->thread.regs, msr); } void giveup_fpu(struct task_struct *tsk) @@ -244,7 +245,7 @@ static void __giveup_altivec(struct task_struct *tsk) msr &= ~MSR_VEC; if (cpu_has_feature(CPU_FTR_VSX)) msr &= ~MSR_VSX; - tsk->thread.regs->msr = msr; + regs_set_return_msr(tsk->thread.regs, msr); } void giveup_altivec(struct task_struct *tsk) @@ -559,7 +560,7 @@ void notrace restore_math(struct pt_regs *regs) msr_check_and_clear(new_msr); - regs->msr |= new_msr | fpexc_mode; + regs_set_return_msr(regs, regs->msr | new_msr | fpexc_mode); } } #endif /* CONFIG_PPC_BOOK3S_64 */ @@ -1114,7 +1115,7 @@ void restore_tm_state(struct pt_regs *regs) #endif restore_math(regs); - regs->msr |= msr_diff; + regs_set_return_msr(regs, regs->msr | msr_diff); } #else /* !CONFIG_PPC_TRANSACTIONAL_MEM */ @@ -1257,14 +1258,16 @@ struct task_struct *__switch_to(struct task_struct *prev, } /* - * Call restore_sprs() before calling _switch(). If we move it after - * _switch() then we miss out on calling it for new tasks. The reason - * for this is we manually create a stack frame for new tasks that - * directly returns through ret_from_fork() or + * Call restore_sprs() and set_return_regs_changed() before calling + * _switch(). If we move it after _switch() then we miss out on calling + * it for new tasks. The reason for this is we manually create a stack + * frame for new tasks that directly returns through ret_from_fork() or * ret_from_kernel_thread(). See copy_thread() for details. */ restore_sprs(old_thread, new_thread); + set_return_regs_changed(); /* _switch changes stack (and regs) */ + #ifdef CONFIG_PPC32 kuap_assert_locked(); #endif @@ -1850,13 +1853,14 @@ void start_thread(struct pt_regs *regs, unsigned long start, unsigned long sp) } regs->gpr[2] = toc; } - regs->nip = entry; - regs->msr = MSR_USER64; + regs_set_return_ip(regs, entry); + regs_set_return_msr(regs, MSR_USER64); } else { - regs->nip = start; regs->gpr[2] = 0; - regs->msr = MSR_USER32; + regs_set_return_ip(regs, start); + regs_set_return_msr(regs, MSR_USER32); } + #endif #ifdef CONFIG_VSX current->thread.used_vsr = 0; @@ -1887,7 +1891,6 @@ void start_thread(struct pt_regs *regs, unsigned long start, unsigned long sp) current->thread.tm_tfiar = 0; current->thread.load_tm = 0; #endif /* CONFIG_PPC_TRANSACTIONAL_MEM */ - } EXPORT_SYMBOL(start_thread); @@ -1935,9 +1938,10 @@ int set_fpexc_mode(struct task_struct *tsk, unsigned int val) if (val > PR_FP_EXC_PRECISE) return -EINVAL; tsk->thread.fpexc_mode = __pack_fe01(val); - if (regs != NULL && (regs->msr & MSR_FP) != 0) - regs->msr = (regs->msr & ~(MSR_FE0|MSR_FE1)) - | tsk->thread.fpexc_mode; + if (regs != NULL && (regs->msr & MSR_FP) != 0) { + regs_set_return_msr(regs, (regs->msr & ~(MSR_FE0|MSR_FE1)) + | tsk->thread.fpexc_mode); + } return 0; } @@ -1983,9 +1987,9 @@ int set_endian(struct task_struct *tsk, unsigned int val) return -EINVAL; if (val == PR_ENDIAN_BIG) - regs->msr &= ~MSR_LE; + regs_set_return_msr(regs, regs->msr & ~MSR_LE); else if (val == PR_ENDIAN_LITTLE || val == PR_ENDIAN_PPC_LITTLE) - regs->msr |= MSR_LE; + regs_set_return_msr(regs, regs->msr | MSR_LE); else return -EINVAL; diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c index cb5be081e499..05ce15b854e2 100644 --- a/arch/powerpc/kernel/prom_init.c +++ b/arch/powerpc/kernel/prom_init.c @@ -32,6 +32,7 @@ #include <asm/rtas.h> #include <asm/page.h> #include <asm/processor.h> +#include <asm/interrupt.h> #include <asm/irq.h> #include <asm/io.h> #include <asm/smp.h> @@ -1792,6 +1793,8 @@ static int prom_rtas_hcall(uint64_t args) asm volatile("sc 1\n" : "=r" (arg1) : "r" (arg1), "r" (arg2) :); + srr_regs_clobbered(); + return arg1; } diff --git a/arch/powerpc/kernel/ptrace/ptrace-adv.c b/arch/powerpc/kernel/ptrace/ptrace-adv.c index 3990c01ef8cf..399f5d94a3df 100644 --- a/arch/powerpc/kernel/ptrace/ptrace-adv.c +++ b/arch/powerpc/kernel/ptrace/ptrace-adv.c @@ -12,7 +12,7 @@ void user_enable_single_step(struct task_struct *task) if (regs != NULL) { task->thread.debug.dbcr0 &= ~DBCR0_BT; task->thread.debug.dbcr0 |= DBCR0_IDM | DBCR0_IC; - regs->msr |= MSR_DE; + regs_set_return_msr(regs, regs->msr | MSR_DE); } set_tsk_thread_flag(task, TIF_SINGLESTEP); } @@ -24,7 +24,7 @@ void user_enable_block_step(struct task_struct *task) if (regs != NULL) { task->thread.debug.dbcr0 &= ~DBCR0_IC; task->thread.debug.dbcr0 = DBCR0_IDM | DBCR0_BT; - regs->msr |= MSR_DE; + regs_set_return_msr(regs, regs->msr | MSR_DE); } set_tsk_thread_flag(task, TIF_SINGLESTEP); } @@ -50,7 +50,7 @@ void user_disable_single_step(struct task_struct *task) * All debug events were off..... */ task->thread.debug.dbcr0 &= ~DBCR0_IDM; - regs->msr &= ~MSR_DE; + regs_set_return_msr(regs, regs->msr & ~MSR_DE); } } clear_tsk_thread_flag(task, TIF_SINGLESTEP); @@ -82,6 +82,7 @@ int ptrace_get_debugreg(struct task_struct *child, unsigned long addr, int ptrace_set_debugreg(struct task_struct *task, unsigned long addr, unsigned long data) { + struct pt_regs *regs = task->thread.regs; #ifdef CONFIG_HAVE_HW_BREAKPOINT int ret; struct thread_struct *thread = &task->thread; @@ -112,7 +113,7 @@ int ptrace_set_debugreg(struct task_struct *task, unsigned long addr, unsigned l dbcr_dac(task) &= ~(DBCR_DAC1R | DBCR_DAC1W); if (!DBCR_ACTIVE_EVENTS(task->thread.debug.dbcr0, task->thread.debug.dbcr1)) { - task->thread.regs->msr &= ~MSR_DE; + regs_set_return_msr(regs, regs->msr & ~MSR_DE); task->thread.debug.dbcr0 &= ~DBCR0_IDM; } return 0; @@ -132,7 +133,7 @@ int ptrace_set_debugreg(struct task_struct *task, unsigned long addr, unsigned l dbcr_dac(task) |= DBCR_DAC1R; if (data & 0x2UL) dbcr_dac(task) |= DBCR_DAC1W; - task->thread.regs->msr |= MSR_DE; + regs_set_return_msr(regs, regs->msr | MSR_DE); return 0; } @@ -220,7 +221,7 @@ static long set_instruction_bp(struct task_struct *child, } out: child->thread.debug.dbcr0 |= DBCR0_IDM; - child->thread.regs->msr |= MSR_DE; + regs_set_return_msr(child->thread.regs, child->thread.regs->msr | MSR_DE); return slot; } @@ -336,7 +337,7 @@ static int set_dac(struct task_struct *child, struct ppc_hw_breakpoint *bp_info) return -ENOSPC; } child->thread.debug.dbcr0 |= DBCR0_IDM; - child->thread.regs->msr |= MSR_DE; + regs_set_return_msr(child->thread.regs, child->thread.regs->msr | MSR_DE); return slot + 4; } @@ -430,7 +431,7 @@ static int set_dac_range(struct task_struct *child, child->thread.debug.dbcr2 |= DBCR2_DAC12MX; else /* PPC_BREAKPOINT_MODE_MASK */ child->thread.debug.dbcr2 |= DBCR2_DAC12MM; - child->thread.regs->msr |= MSR_DE; + regs_set_return_msr(child->thread.regs, child->thread.regs->msr | MSR_DE); return 5; } @@ -485,7 +486,8 @@ long ppc_del_hwdebug(struct task_struct *child, long data) if (!DBCR_ACTIVE_EVENTS(child->thread.debug.dbcr0, child->thread.debug.dbcr1)) { child->thread.debug.dbcr0 &= ~DBCR0_IDM; - child->thread.regs->msr &= ~MSR_DE; + regs_set_return_msr(child->thread.regs, + child->thread.regs->msr & ~MSR_DE); } } return rc; diff --git a/arch/powerpc/kernel/ptrace/ptrace-noadv.c b/arch/powerpc/kernel/ptrace/ptrace-noadv.c index aa36fcad36cd..a5dd7d2e2c9e 100644 --- a/arch/powerpc/kernel/ptrace/ptrace-noadv.c +++ b/arch/powerpc/kernel/ptrace/ptrace-noadv.c @@ -11,10 +11,8 @@ void user_enable_single_step(struct task_struct *task) { struct pt_regs *regs = task->thread.regs; - if (regs != NULL) { - regs->msr &= ~MSR_BE; - regs->msr |= MSR_SE; - } + if (regs != NULL) + regs_set_return_msr(regs, (regs->msr & ~MSR_BE) | MSR_SE); set_tsk_thread_flag(task, TIF_SINGLESTEP); } @@ -22,10 +20,8 @@ void user_enable_block_step(struct task_struct *task) { struct pt_regs *regs = task->thread.regs; - if (regs != NULL) { - regs->msr &= ~MSR_SE; - regs->msr |= MSR_BE; - } + if (regs != NULL) + regs_set_return_msr(regs, (regs->msr & ~MSR_SE) | MSR_BE); set_tsk_thread_flag(task, TIF_SINGLESTEP); } @@ -34,7 +30,7 @@ void user_disable_single_step(struct task_struct *task) struct pt_regs *regs = task->thread.regs; if (regs != NULL) - regs->msr &= ~(MSR_SE | MSR_BE); + regs_set_return_msr(regs, regs->msr & ~(MSR_SE | MSR_BE)); clear_tsk_thread_flag(task, TIF_SINGLESTEP); } diff --git a/arch/powerpc/kernel/ptrace/ptrace-view.c b/arch/powerpc/kernel/ptrace/ptrace-view.c index 773bcc4ca843..b8be1d6668b5 100644 --- a/arch/powerpc/kernel/ptrace/ptrace-view.c +++ b/arch/powerpc/kernel/ptrace/ptrace-view.c @@ -113,8 +113,9 @@ static unsigned long get_user_msr(struct task_struct *task) static __always_inline int set_user_msr(struct task_struct *task, unsigned long msr) { - task->thread.regs->msr &= ~MSR_DEBUGCHANGE; - task->thread.regs->msr |= msr & MSR_DEBUGCHANGE; + unsigned long newmsr = (task->thread.regs->msr & ~MSR_DEBUGCHANGE) | + (msr & MSR_DEBUGCHANGE); + regs_set_return_msr(task->thread.regs, newmsr); return 0; } diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c index 6bada744402b..99f2cce635fb 100644 --- a/arch/powerpc/kernel/rtas.c +++ b/arch/powerpc/kernel/rtas.c @@ -25,6 +25,7 @@ #include <linux/reboot.h> #include <linux/syscalls.h> +#include <asm/interrupt.h> #include <asm/prom.h> #include <asm/rtas.h> #include <asm/hvcall.h> @@ -46,6 +47,13 @@ /* This is here deliberately so it's only used in this file */ void enter_rtas(unsigned long); +static inline void do_enter_rtas(unsigned long args) +{ + enter_rtas(args); + + srr_regs_clobbered(); /* rtas uses SRRs, invalidate */ +} + struct rtas_t rtas = { .lock = __ARCH_SPIN_LOCK_UNLOCKED }; @@ -384,7 +392,7 @@ static char *__fetch_rtas_last_error(char *altbuf) save_args = rtas.args; rtas.args = err_args; - enter_rtas(__pa(&rtas.args)); + do_enter_rtas(__pa(&rtas.args)); err_args = rtas.args; rtas.args = save_args; @@ -430,7 +438,7 @@ va_rtas_call_unlocked(struct rtas_args *args, int token, int nargs, int nret, for (i = 0; i < nret; ++i) args->rets[i] = 0; - enter_rtas(__pa(args)); + do_enter_rtas(__pa(args)); } void rtas_call_unlocked(struct rtas_args *args, int token, int nargs, int nret, ...) @@ -1138,7 +1146,7 @@ SYSCALL_DEFINE1(rtas, struct rtas_args __user *, uargs) flags = lock_rtas(); rtas.args = args; - enter_rtas(__pa(&rtas.args)); + do_enter_rtas(__pa(&rtas.args)); args = rtas.args; /* A -1 return code indicates that the last command couldn't diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c index 9ded046edb0e..e600764a926c 100644 --- a/arch/powerpc/kernel/signal.c +++ b/arch/powerpc/kernel/signal.c @@ -214,7 +214,7 @@ static void check_syscall_restart(struct pt_regs *regs, struct k_sigaction *ka, regs->gpr[0] = __NR_restart_syscall; else regs->gpr[3] = regs->orig_gpr3; - regs->nip -= 4; + regs_add_return_ip(regs, -4); regs->result = 0; } else { if (trap_is_scv(regs)) { @@ -322,16 +322,16 @@ static unsigned long get_tm_stackpointer(struct task_struct *tsk) * For signals taken in non-TM or suspended mode, we use the * normal/non-checkpointed stack pointer. */ - - unsigned long ret = tsk->thread.regs->gpr[1]; + struct pt_regs *regs = tsk->thread.regs; + unsigned long ret = regs->gpr[1]; #ifdef CONFIG_PPC_TRANSACTIONAL_MEM BUG_ON(tsk != current); - if (MSR_TM_ACTIVE(tsk->thread.regs->msr)) { + if (MSR_TM_ACTIVE(regs->msr)) { preempt_disable(); tm_reclaim_current(TM_CAUSE_SIGNAL); - if (MSR_TM_TRANSACTIONAL(tsk->thread.regs->msr)) + if (MSR_TM_TRANSACTIONAL(regs->msr)) ret = tsk->thread.ckpt_regs.gpr[1]; /* @@ -341,7 +341,7 @@ static unsigned long get_tm_stackpointer(struct task_struct *tsk) * (tm_recheckpoint_new_task() would recheckpoint). Besides, we * enter the signal handler in non-transactional state. */ - tsk->thread.regs->msr &= ~MSR_TS_MASK; + regs_set_return_msr(regs, regs->msr & ~MSR_TS_MASK); preempt_enable(); } #endif diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c index f55ac65c7492..0608581967f0 100644 --- a/arch/powerpc/kernel/signal_32.c +++ b/arch/powerpc/kernel/signal_32.c @@ -479,14 +479,14 @@ static long restore_user_regs(struct pt_regs *regs, /* if doing signal return, restore the previous little-endian mode */ if (sig) - regs->msr = (regs->msr & ~MSR_LE) | (msr & MSR_LE); + regs_set_return_msr(regs, (regs->msr & ~MSR_LE) | (msr & MSR_LE)); #ifdef CONFIG_ALTIVEC /* * Force the process to reload the altivec registers from * current->thread when it next does altivec instructions */ - regs->msr &= ~MSR_VEC; + regs_set_return_msr(regs, regs->msr & ~MSR_VEC); if (msr & MSR_VEC) { /* restore altivec registers from the stack */ unsafe_copy_from_user(¤t->thread.vr_state, &sr->mc_vregs, @@ -508,7 +508,7 @@ static long restore_user_regs(struct pt_regs *regs, * Force the process to reload the VSX registers from * current->thread when it next does VSX instruction. */ - regs->msr &= ~MSR_VSX; + regs_set_return_msr(regs, regs->msr & ~MSR_VSX); if (msr & MSR_VSX) { /* * Restore altivec registers from the stack to a local @@ -524,12 +524,12 @@ static long restore_user_regs(struct pt_regs *regs, * force the process to reload the FP registers from * current->thread when it next does FP instructions */ - regs->msr &= ~(MSR_FP | MSR_FE0 | MSR_FE1); + regs_set_return_msr(regs, regs->msr & ~(MSR_FP | MSR_FE0 | MSR_FE1)); #ifdef CONFIG_SPE /* force the process to reload the spe registers from current->thread when it next does spe instructions */ - regs->msr &= ~MSR_SPE; + regs_set_return_msr(regs, regs->msr & ~MSR_SPE); if (msr & MSR_SPE) { /* restore spe registers from the stack */ unsafe_copy_from_user(current->thread.evr, &sr->mc_vregs, @@ -580,9 +580,9 @@ static long restore_tm_user_regs(struct pt_regs *regs, unsafe_get_user(msr, &sr->mc_gregs[PT_MSR], failed); /* Restore the previous little-endian mode */ - regs->msr = (regs->msr & ~MSR_LE) | (msr & MSR_LE); + regs_set_return_msr(regs, (regs->msr & ~MSR_LE) | (msr & MSR_LE)); - regs->msr &= ~MSR_VEC; + regs_set_return_msr(regs, regs->msr & ~MSR_VEC); if (msr & MSR_VEC) { /* restore altivec registers from the stack */ unsafe_copy_from_user(¤t->thread.ckvr_state, &sr->mc_vregs, @@ -601,11 +601,11 @@ static long restore_tm_user_regs(struct pt_regs *regs, if (cpu_has_feature(CPU_FTR_ALTIVEC)) mtspr(SPRN_VRSAVE, current->thread.ckvrsave); - regs->msr &= ~(MSR_FP | MSR_FE0 | MSR_FE1); + regs_set_return_msr(regs, regs->msr & ~(MSR_FP | MSR_FE0 | MSR_FE1)); unsafe_copy_fpr_from_user(current, &sr->mc_fregs, failed); - regs->msr &= ~MSR_VSX; + regs_set_return_msr(regs, regs->msr & ~MSR_VSX); if (msr & MSR_VSX) { /* * Restore altivec registers from the stack to a local @@ -672,7 +672,7 @@ static long restore_tm_user_regs(struct pt_regs *regs, * * Pull in the MSR TM bits from the user context */ - regs->msr = (regs->msr & ~MSR_TS_MASK) | (msr_hi & MSR_TS_MASK); + regs_set_return_msr(regs, (regs->msr & ~MSR_TS_MASK) | (msr_hi & MSR_TS_MASK)); /* Now, recheckpoint. This loads up all of the checkpointed (older) * registers, including FP and V[S]Rs. After recheckpointing, the * transactional versions should be loaded. @@ -687,11 +687,11 @@ static long restore_tm_user_regs(struct pt_regs *regs, msr_check_and_set(msr & (MSR_FP | MSR_VEC)); if (msr & MSR_FP) { load_fp_state(¤t->thread.fp_state); - regs->msr |= (MSR_FP | current->thread.fpexc_mode); + regs_set_return_msr(regs, regs->msr | (MSR_FP | current->thread.fpexc_mode)); } if (msr & MSR_VEC) { load_vr_state(¤t->thread.vr_state); - regs->msr |= MSR_VEC; + regs_set_return_msr(regs, regs->msr | MSR_VEC); } preempt_enable(); @@ -801,10 +801,10 @@ int handle_rt_signal32(struct ksignal *ksig, sigset_t *oldset, regs->gpr[4] = (unsigned long)&frame->info; regs->gpr[5] = (unsigned long)&frame->uc; regs->gpr[6] = (unsigned long)frame; - regs->nip = (unsigned long) ksig->ka.sa.sa_handler; + regs_set_return_ip(regs, (unsigned long) ksig->ka.sa.sa_handler); /* enter the signal handler in native-endian mode */ - regs->msr &= ~MSR_LE; - regs->msr |= (MSR_KERNEL & MSR_LE); + regs_set_return_msr(regs, (regs->msr & ~MSR_LE) | (MSR_KERNEL & MSR_LE)); + return 0; failed: @@ -889,10 +889,10 @@ int handle_signal32(struct ksignal *ksig, sigset_t *oldset, regs->gpr[1] = newsp; regs->gpr[3] = ksig->sig; regs->gpr[4] = (unsigned long) sc; - regs->nip = (unsigned long)ksig->ka.sa.sa_handler; + regs_set_return_ip(regs, (unsigned long) ksig->ka.sa.sa_handler); /* enter the signal handler in native-endian mode */ - regs->msr &= ~MSR_LE; - regs->msr |= (MSR_KERNEL & MSR_LE); + regs_set_return_msr(regs, (regs->msr & ~MSR_LE) | (MSR_KERNEL & MSR_LE)); + return 0; failed: @@ -1142,7 +1142,7 @@ SYSCALL_DEFINE0(rt_sigreturn) * set, and recheckpoint was not called. This avoid * hitting a TM Bad thing at RFID */ - regs->msr &= ~MSR_TS_MASK; + regs_set_return_msr(regs, regs->msr & ~MSR_TS_MASK); } /* Fall through, for non-TM restore */ #endif @@ -1231,7 +1231,7 @@ SYSCALL_DEFINE3(debug_setcontext, struct ucontext __user *, ctx, affect the contents of these registers. After this point, failure is a problem, anyway, and it's very unlikely unless the user is really doing something wrong. */ - regs->msr = new_msr; + regs_set_return_msr(regs, new_msr); #ifdef CONFIG_PPC_ADV_DEBUG_REGS current->thread.debug.dbcr0 = new_dbcr0; #endif diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c index 16b41470ec92..1831bba0582e 100644 --- a/arch/powerpc/kernel/signal_64.c +++ b/arch/powerpc/kernel/signal_64.c @@ -354,7 +354,7 @@ static long notrace __unsafe_restore_sigcontext(struct task_struct *tsk, sigset_ /* get MSR separately, transfer the LE bit if doing signal return */ unsafe_get_user(msr, &sc->gp_regs[PT_MSR], efault_out); if (sig) - regs->msr = (regs->msr & ~MSR_LE) | (msr & MSR_LE); + regs_set_return_msr(regs, (regs->msr & ~MSR_LE) | (msr & MSR_LE)); unsafe_get_user(regs->orig_gpr3, &sc->gp_regs[PT_ORIG_R3], efault_out); unsafe_get_user(regs->ctr, &sc->gp_regs[PT_CTR], efault_out); unsafe_get_user(regs->link, &sc->gp_regs[PT_LNK], efault_out); @@ -376,7 +376,7 @@ static long notrace __unsafe_restore_sigcontext(struct task_struct *tsk, sigset_ * This has to be done before copying stuff into tsk->thread.fpr/vr * for the reasons explained in the previous comment. */ - regs->msr &= ~(MSR_FP | MSR_FE0 | MSR_FE1 | MSR_VEC | MSR_VSX); + regs_set_return_msr(regs, regs->msr & ~(MSR_FP | MSR_FE0 | MSR_FE1 | MSR_VEC | MSR_VSX)); #ifdef CONFIG_ALTIVEC unsafe_get_user(v_regs, &sc->v_regs, efault_out); @@ -468,7 +468,7 @@ static long restore_tm_sigcontexts(struct task_struct *tsk, return -EINVAL; /* pull in MSR LE from user context */ - regs->msr = (regs->msr & ~MSR_LE) | (msr & MSR_LE); + regs_set_return_msr(regs, (regs->msr & ~MSR_LE) | (msr & MSR_LE)); /* The following non-GPR non-FPR non-VR state is also checkpointed: */ err |= __get_user(regs->ctr, &tm_sc->gp_regs[PT_CTR]); @@ -495,7 +495,7 @@ static long restore_tm_sigcontexts(struct task_struct *tsk, * This has to be done before copying stuff into tsk->thread.fpr/vr * for the reasons explained in the previous comment. */ - regs->msr &= ~(MSR_FP | MSR_FE0 | MSR_FE1 | MSR_VEC | MSR_VSX); + regs_set_return_msr(regs, regs->msr & ~(MSR_FP | MSR_FE0 | MSR_FE1 | MSR_VEC | MSR_VSX)); #ifdef CONFIG_ALTIVEC err |= __get_user(v_regs, &sc->v_regs); @@ -565,7 +565,7 @@ static long restore_tm_sigcontexts(struct task_struct *tsk, preempt_disable(); /* pull in MSR TS bits from user context */ - regs->msr |= msr & MSR_TS_MASK; + regs_set_return_msr(regs, regs->msr | (msr & MSR_TS_MASK)); /* * Ensure that TM is enabled in regs->msr before we leave the signal @@ -583,7 +583,7 @@ static long restore_tm_sigcontexts(struct task_struct *tsk, * to be de-scheduled with MSR[TS] set but without calling * tm_recheckpoint(). This can cause a bug. */ - regs->msr |= MSR_TM; + regs_set_return_msr(regs, regs->msr | MSR_TM); /* This loads the checkpointed FP/VEC state, if used */ tm_recheckpoint(&tsk->thread); @@ -591,11 +591,11 @@ static long restore_tm_sigcontexts(struct task_struct *tsk, msr_check_and_set(msr & (MSR_FP | MSR_VEC)); if (msr & MSR_FP) { load_fp_state(&tsk->thread.fp_state); - regs->msr |= (MSR_FP | tsk->thread.fpexc_mode); + regs_set_return_msr(regs, regs->msr | (MSR_FP | tsk->thread.fpexc_mode)); } if (msr & MSR_VEC) { load_vr_state(&tsk->thread.vr_state); - regs->msr |= MSR_VEC; + regs_set_return_msr(regs, regs->msr | MSR_VEC); } preempt_enable(); @@ -717,6 +717,7 @@ SYSCALL_DEFINE3(swapcontext, struct ucontext __user *, old_ctx, /* This returns like rt_sigreturn */ set_thread_flag(TIF_RESTOREALL); + return 0; efault_out: @@ -783,7 +784,7 @@ SYSCALL_DEFINE0(rt_sigreturn) * the MSR[TS] that came from user context later, at * restore_tm_sigcontexts. */ - regs->msr &= ~MSR_TS_MASK; + regs_set_return_msr(regs, regs->msr & ~MSR_TS_MASK); if (__get_user(msr, &uc->uc_mcontext.gp_regs[PT_MSR])) goto badframe; @@ -815,7 +816,8 @@ SYSCALL_DEFINE0(rt_sigreturn) * MSR[TS] set, but without CPU in the proper state, * causing a TM bad thing. */ - current->thread.regs->msr &= ~MSR_TS_MASK; + regs_set_return_msr(current->thread.regs, + current->thread.regs->msr & ~MSR_TS_MASK); if (!user_read_access_begin(&uc->uc_mcontext, sizeof(uc->uc_mcontext))) goto badframe; @@ -829,6 +831,7 @@ SYSCALL_DEFINE0(rt_sigreturn) goto badframe; set_thread_flag(TIF_RESTOREALL); + return 0; badframe_block: @@ -908,12 +911,12 @@ int handle_rt_signal64(struct ksignal *ksig, sigset_t *set, /* Set up to return from userspace. */ if (tsk->mm->context.vdso) { - regs->nip = VDSO64_SYMBOL(tsk->mm->context.vdso, sigtramp_rt64); + regs_set_return_ip(regs, VDSO64_SYMBOL(tsk->mm->context.vdso, sigtramp_rt64)); } else { err |= setup_trampoline(__NR_rt_sigreturn, &frame->tramp[0]); if (err) goto badframe; - regs->nip = (unsigned long) &frame->tramp[0]; + regs_set_return_ip(regs, (unsigned long) &frame->tramp[0]); } /* Allocate a dummy caller frame for the signal handler. */ @@ -938,8 +941,7 @@ int handle_rt_signal64(struct ksignal *ksig, sigset_t *set, } /* enter the signal handler in native-endian mode */ - regs->msr &= ~MSR_LE; - regs->msr |= (MSR_KERNEL & MSR_LE); + regs_set_return_msr(regs, (regs->msr & ~MSR_LE) | (MSR_KERNEL & MSR_LE)); regs->gpr[1] = newsp; regs->gpr[3] = ksig->sig; regs->result = 0; diff --git a/arch/powerpc/kernel/syscalls.c b/arch/powerpc/kernel/syscalls.c index a552c9e68d7e..bf4ae0f0e36c 100644 --- a/arch/powerpc/kernel/syscalls.c +++ b/arch/powerpc/kernel/syscalls.c @@ -114,7 +114,8 @@ SYSCALL_DEFINE0(switch_endian) { struct thread_info *ti; - current->thread.regs->msr ^= MSR_LE; + regs_set_return_msr(current->thread.regs, + current->thread.regs->msr ^ MSR_LE); /* * Set TIF_RESTOREALL so that r3 isn't clobbered on return to diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index c929d93c35d0..dfbce527c98e 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -428,7 +428,7 @@ void hv_nmi_check_nonrecoverable(struct pt_regs *regs) return; nonrecoverable: - regs->msr &= ~MSR_RI; + regs_set_return_msr(regs, regs->msr & ~MSR_RI); #endif } DEFINE_INTERRUPT_HANDLER_NMI(system_reset_exception) @@ -550,8 +550,8 @@ static inline int check_io_access(struct pt_regs *regs) printk(KERN_DEBUG "%s bad port %lx at %p\n", (*nip & 0x100)? "OUT to": "IN from", regs->gpr[rb] - _IO_BASE, nip); - regs->msr |= MSR_RI; - regs->nip = extable_fixup(entry); + regs_set_return_msr(regs, regs->msr | MSR_RI); + regs_set_return_ip(regs, extable_fixup(entry)); return 1; } } @@ -587,8 +587,8 @@ static inline int check_io_access(struct pt_regs *regs) #define REASON_BOUNDARY SRR1_BOUNDARY #define single_stepping(regs) ((regs)->msr & MSR_SE) -#define clear_single_step(regs) ((regs)->msr &= ~MSR_SE) -#define clear_br_trace(regs) ((regs)->msr &= ~MSR_BE) +#define clear_single_step(regs) (regs_set_return_msr((regs), (regs)->msr & ~MSR_SE)) +#define clear_br_trace(regs) (regs_set_return_msr((regs), (regs)->msr & ~MSR_BE)) #endif #define inst_length(reason) (((reason) & REASON_PREFIXED) ? 8 : 4) @@ -1032,7 +1032,7 @@ static void p9_hmi_special_emu(struct pt_regs *regs) #endif /* !__LITTLE_ENDIAN__ */ /* Go to next instruction */ - regs->nip += 4; + regs_add_return_ip(regs, 4); } #endif /* CONFIG_VSX */ @@ -1477,7 +1477,7 @@ static void do_program_check(struct pt_regs *regs) if (!(regs->msr & MSR_PR) && /* not user-mode */ report_bug(bugaddr, regs) == BUG_TRAP_TYPE_WARN) { - regs->nip += 4; + regs_add_return_ip(regs, 4); return; } _exception(SIGTRAP, regs, TRAP_BRKPT, regs->nip); @@ -1539,7 +1539,7 @@ static void do_program_check(struct pt_regs *regs) if (reason & (REASON_ILLEGAL | REASON_PRIVILEGED)) { switch (emulate_instruction(regs)) { case 0: - regs->nip += 4; + regs_add_return_ip(regs, 4); emulate_single_step(regs); return; case -EFAULT: @@ -1567,7 +1567,7 @@ DEFINE_INTERRUPT_HANDLER(program_check_exception) */ DEFINE_INTERRUPT_HANDLER(emulation_assist_interrupt) { - regs->msr |= REASON_ILLEGAL; + regs_set_return_msr(regs, regs->msr | REASON_ILLEGAL); do_program_check(regs); } @@ -1594,7 +1594,7 @@ DEFINE_INTERRUPT_HANDLER(alignment_exception) if (fixed == 1) { /* skip over emulated instruction */ - regs->nip += inst_length(reason); + regs_add_return_ip(regs, inst_length(reason)); emulate_single_step(regs); return; } @@ -1660,7 +1660,7 @@ static void tm_unavailable(struct pt_regs *regs) #ifdef CONFIG_PPC_TRANSACTIONAL_MEM if (user_mode(regs)) { current->thread.load_tm++; - regs->msr |= MSR_TM; + regs_set_return_msr(regs, regs->msr | MSR_TM); tm_enable(); tm_restore_sprs(¤t->thread); return; @@ -1752,7 +1752,7 @@ DEFINE_INTERRUPT_HANDLER(facility_unavailable_exception) pr_err("DSCR based mfspr emulation failed\n"); return; } - regs->nip += 4; + regs_add_return_ip(regs, 4); emulate_single_step(regs); } return; @@ -1949,7 +1949,7 @@ static void handle_debug(struct pt_regs *regs, unsigned long debug_status) */ if (DBCR_ACTIVE_EVENTS(current->thread.debug.dbcr0, current->thread.debug.dbcr1)) - regs->msr |= MSR_DE; + regs_set_return_msr(regs, regs->msr | MSR_DE); else /* Make sure the IDM flag is off */ current->thread.debug.dbcr0 &= ~DBCR0_IDM; @@ -1970,7 +1970,7 @@ DEFINE_INTERRUPT_HANDLER(DebugException) * instead of stopping here when hitting a BT */ if (debug_status & DBSR_BT) { - regs->msr &= ~MSR_DE; + regs_set_return_msr(regs, regs->msr & ~MSR_DE); /* Disable BT */ mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) & ~DBCR0_BT); @@ -1981,7 +1981,7 @@ DEFINE_INTERRUPT_HANDLER(DebugException) if (user_mode(regs)) { current->thread.debug.dbcr0 &= ~DBCR0_BT; current->thread.debug.dbcr0 |= DBCR0_IDM | DBCR0_IC; - regs->msr |= MSR_DE; + regs_set_return_msr(regs, regs->msr | MSR_DE); return; } @@ -1995,7 +1995,7 @@ DEFINE_INTERRUPT_HANDLER(DebugException) if (debugger_sstep(regs)) return; } else if (debug_status & DBSR_IC) { /* Instruction complete */ - regs->msr &= ~MSR_DE; + regs_set_return_msr(regs, regs->msr & ~MSR_DE); /* Disable instruction completion */ mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) & ~DBCR0_IC); @@ -2017,7 +2017,7 @@ DEFINE_INTERRUPT_HANDLER(DebugException) current->thread.debug.dbcr0 &= ~DBCR0_IC; if (DBCR_ACTIVE_EVENTS(current->thread.debug.dbcr0, current->thread.debug.dbcr1)) - regs->msr |= MSR_DE; + regs_set_return_msr(regs, regs->msr | MSR_DE); else /* Make sure the IDM bit is off */ current->thread.debug.dbcr0 &= ~DBCR0_IDM; @@ -2045,7 +2045,7 @@ DEFINE_INTERRUPT_HANDLER(altivec_assist_exception) PPC_WARN_EMULATED(altivec, regs); err = emulate_altivec(regs); if (err == 0) { - regs->nip += 4; /* skip emulated instruction */ + regs_add_return_ip(regs, 4); /* skip emulated instruction */ emulate_single_step(regs); return; } @@ -2110,7 +2110,7 @@ DEFINE_INTERRUPT_HANDLER(SPEFloatingPointException) err = do_spe_mathemu(regs); if (err == 0) { - regs->nip += 4; /* skip emulated instruction */ + regs_add_return_ip(regs, 4); /* skip emulated instruction */ emulate_single_step(regs); return; } @@ -2141,10 +2141,10 @@ DEFINE_INTERRUPT_HANDLER(SPEFloatingPointRoundException) giveup_spe(current); preempt_enable(); - regs->nip -= 4; + regs_add_return_ip(regs, -4); err = speround_handler(regs); if (err == 0) { - regs->nip += 4; /* skip emulated instruction */ + regs_add_return_ip(regs, 4); /* skip emulated instruction */ emulate_single_step(regs); return; } diff --git a/arch/powerpc/kernel/uprobes.c b/arch/powerpc/kernel/uprobes.c index 1aefd2ecbb8a..c6975467d9ff 100644 --- a/arch/powerpc/kernel/uprobes.c +++ b/arch/powerpc/kernel/uprobes.c @@ -62,7 +62,7 @@ int arch_uprobe_pre_xol(struct arch_uprobe *auprobe, struct pt_regs *regs) autask->saved_trap_nr = current->thread.trap_nr; current->thread.trap_nr = UPROBE_TRAP_NR; - regs->nip = current->utask->xol_vaddr; + regs_set_return_ip(regs, current->utask->xol_vaddr); user_enable_single_step(current); return 0; @@ -119,7 +119,7 @@ int arch_uprobe_post_xol(struct arch_uprobe *auprobe, struct pt_regs *regs) * support doesn't exist and have to fix-up the next instruction * to be executed. */ - regs->nip = (unsigned long)ppc_inst_next((void *)utask->vaddr, auprobe->insn); + regs_set_return_ip(regs, (unsigned long)ppc_inst_next((void *)utask->vaddr, auprobe->insn)); user_disable_single_step(current); return 0; diff --git a/arch/powerpc/kernel/vector.S b/arch/powerpc/kernel/vector.S index 54dbefcb4cde..fc120fac1910 100644 --- a/arch/powerpc/kernel/vector.S +++ b/arch/powerpc/kernel/vector.S @@ -73,6 +73,10 @@ _GLOBAL(load_up_altivec) addi r5,r4,THREAD /* Get THREAD */ oris r12,r12,MSR_VEC@h std r12,_MSR(r1) +#ifdef CONFIG_PPC_BOOK3S_64 + li r4,0 + stb r4,PACASRR_VALID(r13) +#endif #endif li r4,1 stb r4,THREAD_LOAD_VEC(r5) @@ -131,6 +135,8 @@ _GLOBAL(load_up_vsx) /* enable use of VSX after return */ oris r12,r12,MSR_VSX@h std r12,_MSR(r1) + li r4,0 + stb r4,PACASRR_VALID(r13) b fast_interrupt_return_srr #endif /* CONFIG_VSX */ diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 279eae8f9dbc..010fa75518ae 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -4626,6 +4626,9 @@ static int kvmppc_vcpu_run_hv(struct kvm_vcpu *vcpu) vcpu->arch.state = KVMPPC_VCPU_NOTREADY; atomic_dec(&kvm->arch.vcpus_running); + + srr_regs_clobbered(); + return r; } diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c index d7733b07f489..1ed5ceee73eb 100644 --- a/arch/powerpc/kvm/book3s_pr.c +++ b/arch/powerpc/kvm/book3s_pr.c @@ -25,6 +25,7 @@ #include <asm/cputable.h> #include <asm/cacheflush.h> #include <linux/uaccess.h> +#include <asm/interrupt.h> #include <asm/io.h> #include <asm/kvm_ppc.h> #include <asm/kvm_book3s.h> @@ -1848,6 +1849,7 @@ static int kvmppc_vcpu_run_pr(struct kvm_vcpu *vcpu) /* Make sure we save the guest TAR/EBB/DSCR state */ kvmppc_giveup_fac(vcpu, FSCR_TAR_LG); + srr_regs_clobbered(); out: vcpu->mode = OUTSIDE_GUEST_MODE; return ret; diff --git a/arch/powerpc/lib/error-inject.c b/arch/powerpc/lib/error-inject.c index 407b992fb02f..e834079d2b5c 100644 --- a/arch/powerpc/lib/error-inject.c +++ b/arch/powerpc/lib/error-inject.c @@ -11,6 +11,6 @@ void override_function_with_return(struct pt_regs *regs) * function in the kernel/module, captured on a kprobe. We don't need * to worry about 32-bit userspace on a 64-bit kernel. */ - regs->nip = regs->link; + regs_set_return_ip(regs, regs->link); } NOKPROBE_SYMBOL(override_function_with_return); diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c index aee42bcc775b..d8d5f901cee1 100644 --- a/arch/powerpc/lib/sstep.c +++ b/arch/powerpc/lib/sstep.c @@ -3225,7 +3225,7 @@ void emulate_update_regs(struct pt_regs *regs, struct instruction_op *op) default: WARN_ON_ONCE(1); } - regs->nip = next_pc; + regs_set_return_ip(regs, next_pc); } NOKPROBE_SYMBOL(emulate_update_regs); @@ -3563,7 +3563,7 @@ int emulate_step(struct pt_regs *regs, struct ppc_inst instr) /* can't step mtmsr[d] that would clear MSR_RI */ return -1; /* here op.val is the mask of bits to change */ - regs->msr = (regs->msr & ~op.val) | (val & op.val); + regs_set_return_msr(regs, (regs->msr & ~op.val) | (val & op.val)); goto instr_done; #ifdef CONFIG_PPC64 @@ -3576,7 +3576,7 @@ int emulate_step(struct pt_regs *regs, struct ppc_inst instr) if (IS_ENABLED(CONFIG_PPC_FAST_ENDIAN_SWITCH) && cpu_has_feature(CPU_FTR_REAL_LE) && regs->gpr[0] == 0x1ebe) { - regs->msr ^= MSR_LE; + regs_set_return_msr(regs, regs->msr ^ MSR_LE); goto instr_done; } regs->gpr[9] = regs->gpr[13]; @@ -3584,8 +3584,8 @@ int emulate_step(struct pt_regs *regs, struct ppc_inst instr) regs->gpr[11] = regs->nip + 4; regs->gpr[12] = regs->msr & MSR_MASK; regs->gpr[13] = (unsigned long) get_paca(); - regs->nip = (unsigned long) &system_call_common; - regs->msr = MSR_KERNEL; + regs_set_return_ip(regs, (unsigned long) &system_call_common); + regs_set_return_msr(regs, MSR_KERNEL); return 1; #ifdef CONFIG_PPC_BOOK3S_64 @@ -3595,8 +3595,8 @@ int emulate_step(struct pt_regs *regs, struct ppc_inst instr) regs->gpr[11] = regs->nip + 4; regs->gpr[12] = regs->msr & MSR_MASK; regs->gpr[13] = (unsigned long) get_paca(); - regs->nip = (unsigned long) &system_call_vectored_emulate; - regs->msr = MSR_KERNEL; + regs_set_return_ip(regs, (unsigned long) &system_call_vectored_emulate); + regs_set_return_msr(regs, MSR_KERNEL); return 1; #endif @@ -3607,7 +3607,8 @@ int emulate_step(struct pt_regs *regs, struct ppc_inst instr) return 0; instr_done: - regs->nip = truncate_if_32bit(regs->msr, regs->nip + GETLENGTH(op.type)); + regs_set_return_ip(regs, + truncate_if_32bit(regs->msr, regs->nip + GETLENGTH(op.type))); return 1; } NOKPROBE_SYMBOL(emulate_step); diff --git a/arch/powerpc/lib/test_emulate_step.c b/arch/powerpc/lib/test_emulate_step.c index 1cbfa468813b..8b4f6b3e96c4 100644 --- a/arch/powerpc/lib/test_emulate_step.c +++ b/arch/powerpc/lib/test_emulate_step.c @@ -1609,6 +1609,7 @@ static int __init emulate_compute_instr(struct pt_regs *regs, if (!regs || !ppc_inst_val(instr)) return -EINVAL; + /* This is not a return frame regs */ regs->nip = patch_site_addr(&patch__exec_instr); analysed = analyse_instr(&op, regs, instr); diff --git a/arch/powerpc/math-emu/math.c b/arch/powerpc/math-emu/math.c index 327165f26ca6..36761bd00f38 100644 --- a/arch/powerpc/math-emu/math.c +++ b/arch/powerpc/math-emu/math.c @@ -453,7 +453,7 @@ do_mathemu(struct pt_regs *regs) break; } - regs->nip += 4; + regs_add_return_ip(regs, 4); return 0; illegal: diff --git a/arch/powerpc/math-emu/math_efp.c b/arch/powerpc/math-emu/math_efp.c index 0a05e51964c1..39b84e7452e1 100644 --- a/arch/powerpc/math-emu/math_efp.c +++ b/arch/powerpc/math-emu/math_efp.c @@ -710,7 +710,7 @@ update_regs: illegal: if (have_e500_cpu_a005_erratum) { /* according to e500 cpu a005 erratum, reissue efp inst */ - regs->nip -= 4; + regs_add_return_ip(regs, -4); pr_debug("re-issue efp inst: %08lx\n", speinsn); return 0; } diff --git a/arch/powerpc/platforms/embedded6xx/holly.c b/arch/powerpc/platforms/embedded6xx/holly.c index 53065d564161..85521b3e7098 100644 --- a/arch/powerpc/platforms/embedded6xx/holly.c +++ b/arch/powerpc/platforms/embedded6xx/holly.c @@ -251,8 +251,8 @@ static int ppc750_machine_check_exception(struct pt_regs *regs) /* Are we prepared to handle this fault */ if ((entry = search_exception_tables(regs->nip)) != NULL) { tsi108_clear_pci_cfg_error(); - regs->msr |= MSR_RI; - regs->nip = extable_fixup(entry); + regs_set_return_msr(regs, regs->msr | MSR_RI); + regs_set_return_ip(regs, extable_fixup(entry)); return 1; } return 0; diff --git a/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c b/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c index 5565647dc879..d8da6a483e59 100644 --- a/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c +++ b/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c @@ -173,8 +173,8 @@ static int mpc7448_machine_check_exception(struct pt_regs *regs) /* Are we prepared to handle this fault */ if ((entry = search_exception_tables(regs->nip)) != NULL) { tsi108_clear_pci_cfg_error(); - regs->msr |= MSR_RI; - regs->nip = extable_fixup(entry); + regs_set_return_msr(regs, regs->msr | MSR_RI); + regs_set_return_ip(regs, extable_fixup(entry)); return 1; } return 0; diff --git a/arch/powerpc/platforms/pasemi/idle.c b/arch/powerpc/platforms/pasemi/idle.c index 1c954c90b0f4..9b88e3cded7d 100644 --- a/arch/powerpc/platforms/pasemi/idle.c +++ b/arch/powerpc/platforms/pasemi/idle.c @@ -37,7 +37,7 @@ static int pasemi_system_reset_exception(struct pt_regs *regs) */ if (regs->msr & SRR1_WAKEMASK) - regs->nip = regs->link; + regs_set_return_ip(regs, regs->link); switch (regs->msr & SRR1_WAKEMASK) { case SRR1_WAKEDEC: @@ -58,7 +58,7 @@ static int pasemi_system_reset_exception(struct pt_regs *regs) restore_astate(hard_smp_processor_id()); /* everything handled */ - regs->msr |= MSR_RI; + regs_set_return_msr(regs, regs->msr | MSR_RI); return 1; } diff --git a/arch/powerpc/platforms/powernv/opal-call.c b/arch/powerpc/platforms/powernv/opal-call.c index 01401e3da7ca..f812c74c61e5 100644 --- a/arch/powerpc/platforms/powernv/opal-call.c +++ b/arch/powerpc/platforms/powernv/opal-call.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 #include <linux/percpu.h> #include <linux/jump_label.h> +#include <asm/interrupt.h> #include <asm/opal-api.h> #include <asm/trace.h> #include <asm/asm-prototypes.h> @@ -100,6 +101,9 @@ static int64_t opal_call(int64_t a0, int64_t a1, int64_t a2, int64_t a3, bool mmu = (msr & (MSR_IR|MSR_DR)); int64_t ret; + /* OPAL call / firmware may use SRR and/or HSRR */ + srr_regs_clobbered(); + msr &= ~MSR_EE; if (unlikely(!mmu)) diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c index 303d7c775740..2835376e61a4 100644 --- a/arch/powerpc/platforms/powernv/opal.c +++ b/arch/powerpc/platforms/powernv/opal.c @@ -773,7 +773,7 @@ bool opal_mce_check_early_recovery(struct pt_regs *regs) * Setup regs->nip to rfi into fixup address. */ if (recover_addr) - regs->nip = recover_addr; + regs_set_return_ip(regs, recover_addr); out: return !!recover_addr; diff --git a/arch/powerpc/platforms/pseries/hvCall.S b/arch/powerpc/platforms/pseries/hvCall.S index 8a2b8d64265b..ab9fc6506861 100644 --- a/arch/powerpc/platforms/pseries/hvCall.S +++ b/arch/powerpc/platforms/pseries/hvCall.S @@ -108,6 +108,10 @@ _GLOBAL_TOC(plpar_hcall_norets_notrace) mfcr r0 stw r0,8(r1) HVSC /* invoke the hypervisor */ + + li r4,0 + stb r4,PACASRR_VALID(r13) + lwz r0,8(r1) mtcrf 0xff,r0 blr /* return r3 = status */ @@ -120,6 +124,9 @@ _GLOBAL_TOC(plpar_hcall_norets) HCALL_BRANCH(plpar_hcall_norets_trace) HVSC /* invoke the hypervisor */ + li r4,0 + stb r4,PACASRR_VALID(r13) + lwz r0,8(r1) mtcrf 0xff,r0 blr /* return r3 = status */ @@ -129,6 +136,10 @@ plpar_hcall_norets_trace: HCALL_INST_PRECALL(R4) HVSC HCALL_INST_POSTCALL_NORETS + + li r4,0 + stb r4,PACASRR_VALID(r13) + lwz r0,8(r1) mtcrf 0xff,r0 blr @@ -159,6 +170,9 @@ _GLOBAL_TOC(plpar_hcall) std r6, 16(r12) std r7, 24(r12) + li r4,0 + stb r4,PACASRR_VALID(r13) + lwz r0,8(r1) mtcrf 0xff,r0 @@ -188,6 +202,9 @@ plpar_hcall_trace: HCALL_INST_POSTCALL(r12) + li r4,0 + stb r4,PACASRR_VALID(r13) + lwz r0,8(r1) mtcrf 0xff,r0 @@ -223,6 +240,9 @@ _GLOBAL(plpar_hcall_raw) std r6, 16(r12) std r7, 24(r12) + li r4,0 + stb r4,PACASRR_VALID(r13) + lwz r0,8(r1) mtcrf 0xff,r0 @@ -262,6 +282,9 @@ _GLOBAL_TOC(plpar_hcall9) std r11,56(r12) std r0, 64(r12) + li r4,0 + stb r4,PACASRR_VALID(r13) + lwz r0,8(r1) mtcrf 0xff,r0 @@ -300,6 +323,9 @@ plpar_hcall9_trace: HCALL_INST_POSTCALL(r12) + li r4,0 + stb r4,PACASRR_VALID(r13) + lwz r0,8(r1) mtcrf 0xff,r0 @@ -339,6 +365,9 @@ _GLOBAL(plpar_hcall9_raw) std r11,56(r12) std r0, 64(r12) + li r4,0 + stb r4,PACASRR_VALID(r13) + lwz r0,8(r1) mtcrf 0xff,r0 diff --git a/arch/powerpc/platforms/pseries/ras.c b/arch/powerpc/platforms/pseries/ras.c index 2f636308cf60..167f2e1b8d39 100644 --- a/arch/powerpc/platforms/pseries/ras.c +++ b/arch/powerpc/platforms/pseries/ras.c @@ -487,8 +487,8 @@ int pSeries_system_reset_exception(struct pt_regs *regs) if ((be64_to_cpu(regs->msr) & (MSR_LE|MSR_RI|MSR_DR|MSR_IR|MSR_ME|MSR_PR| MSR_ILE|MSR_HV|MSR_SF)) == (MSR_DR|MSR_SF)) { - regs->nip = be64_to_cpu((__be64)regs->nip); - regs->msr = 0; + regs_set_return_ip(regs, be64_to_cpu((__be64)regs->nip)); + regs_set_return_msr(regs, 0); } #endif diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c index 69af73765783..b8f76f3fd994 100644 --- a/arch/powerpc/sysdev/fsl_pci.c +++ b/arch/powerpc/sysdev/fsl_pci.c @@ -1072,7 +1072,7 @@ int fsl_pci_mcheck_exception(struct pt_regs *regs) ret = get_kernel_nofault(inst, (void *)regs->nip); if (!ret && mcheck_handle_load(regs, inst)) { - regs->nip += 4; + regs_add_return_ip(regs, 4); return 1; } } diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c index 07c164f7f8cf..5a95b8ea23d8 100644 --- a/arch/powerpc/sysdev/fsl_rio.c +++ b/arch/powerpc/sysdev/fsl_rio.c @@ -108,8 +108,8 @@ int fsl_rio_mcheck_exception(struct pt_regs *regs) __func__); out_be32((u32 *)(rio_regs_win + RIO_LTLEDCSR), 0); - regs->msr |= MSR_RI; - regs->nip = extable_fixup(entry); + regs_set_return_msr(regs, regs->msr | MSR_RI); + regs_set_return_ip(regs, extable_fixup(entry)); return 1; } } diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index bd7ee794be92..dbc38483473c 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -514,7 +514,7 @@ static int xmon_core(struct pt_regs *regs, int fromipi) bp = in_breakpoint_table(regs->nip, &offset); if (bp != NULL) { - regs->nip = bp->address + offset; + regs_set_return_ip(regs, bp->address + offset); atomic_dec(&bp->ref_count); } @@ -702,7 +702,7 @@ static int xmon_core(struct pt_regs *regs, int fromipi) if (regs->msr & MSR_DE) { bp = at_breakpoint(regs->nip); if (bp != NULL) { - regs->nip = (unsigned long) &bp->instr[0]; + regs_set_return_ip(regs, (unsigned long) &bp->instr[0]); atomic_inc(&bp->ref_count); } } @@ -712,7 +712,7 @@ static int xmon_core(struct pt_regs *regs, int fromipi) if (bp != NULL) { int stepped = emulate_step(regs, ppc_inst_read(bp->instr)); if (stepped == 0) { - regs->nip = (unsigned long) &bp->instr[0]; + regs_set_return_ip(regs, (unsigned long) &bp->instr[0]); atomic_inc(&bp->ref_count); } else if (stepped < 0) { printf("Couldn't single-step %s instruction\n", @@ -766,7 +766,7 @@ static int xmon_bpt(struct pt_regs *regs) /* Are we at the trap at bp->instr[1] for some bp? */ bp = in_breakpoint_table(regs->nip, &offset); if (bp != NULL && (offset == 4 || offset == 8)) { - regs->nip = bp->address + offset; + regs_set_return_ip(regs, bp->address + offset); atomic_dec(&bp->ref_count); return 1; } @@ -836,7 +836,7 @@ static int xmon_fault_handler(struct pt_regs *regs) if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) { bp = in_breakpoint_table(regs->nip, &offset); if (bp != NULL) { - regs->nip = bp->address + offset; + regs_set_return_ip(regs, bp->address + offset); atomic_dec(&bp->ref_count); } } @@ -1188,7 +1188,7 @@ cmds(struct pt_regs *excp) #ifdef CONFIG_BOOKE static int do_step(struct pt_regs *regs) { - regs->msr |= MSR_DE; + regs_set_return_msr(regs, regs->msr | MSR_DE); mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM); return 1; } @@ -1221,7 +1221,7 @@ static int do_step(struct pt_regs *regs) } } } - regs->msr |= MSR_SE; + regs_set_return_msr(regs, regs->msr | MSR_SE); return 1; } #endif |