diff options
Diffstat (limited to 'arch/powerpc/kernel/entry_64.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 65 |
1 files changed, 47 insertions, 18 deletions
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 03727308d8cc..03a45a88b4b8 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -635,51 +635,57 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) * touched, no exit work created, then this can be used. */ .balign IFETCH_ALIGN_BYTES - .globl fast_interrupt_return -fast_interrupt_return: -_ASM_NOKPROBE_SYMBOL(fast_interrupt_return) + .globl fast_interrupt_return_srr +fast_interrupt_return_srr: +_ASM_NOKPROBE_SYMBOL(fast_interrupt_return_srr) kuap_check_amr r3, r4 ld r5,_MSR(r1) andi. r0,r5,MSR_PR #ifdef CONFIG_PPC_BOOK3S - bne .Lfast_user_interrupt_return_amr + bne .Lfast_user_interrupt_return_amr_srr kuap_kernel_restore r3, r4 andi. r0,r5,MSR_RI li r3,0 /* 0 return value, no EMULATE_STACK_STORE */ - bne+ .Lfast_kernel_interrupt_return + bne+ .Lfast_kernel_interrupt_return_srr addi r3,r1,STACK_FRAME_OVERHEAD bl unrecoverable_exception b . /* should not get here */ #else - bne .Lfast_user_interrupt_return - b .Lfast_kernel_interrupt_return + bne .Lfast_user_interrupt_return_srr + b .Lfast_kernel_interrupt_return_srr #endif +.macro interrupt_return_macro srr .balign IFETCH_ALIGN_BYTES - .globl interrupt_return -interrupt_return: -_ASM_NOKPROBE_SYMBOL(interrupt_return) + .globl interrupt_return_\srr +interrupt_return_\srr\(): +_ASM_NOKPROBE_SYMBOL(interrupt_return_\srr\()) ld r4,_MSR(r1) andi. r0,r4,MSR_PR - beq .Lkernel_interrupt_return + beq .Lkernel_interrupt_return_\srr addi r3,r1,STACK_FRAME_OVERHEAD bl interrupt_exit_user_prepare cmpdi r3,0 - bne- .Lrestore_nvgprs + bne- .Lrestore_nvgprs_\srr #ifdef CONFIG_PPC_BOOK3S -.Lfast_user_interrupt_return_amr: +.Lfast_user_interrupt_return_amr_\srr\(): kuap_user_restore r3, r4 #endif -.Lfast_user_interrupt_return: +.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) + .ifc \srr,srr mtspr SPRN_SRR0,r11 mtspr SPRN_SRR1,r12 + .else + mtspr SPRN_HSRR0,r11 + mtspr SPRN_HSRR1,r12 + .endif BEGIN_FTR_SECTION stdcx. r0,0,r1 /* to clear the reservation */ @@ -706,24 +712,33 @@ ALT_FTR_SECTION_END_IFCLR(CPU_FTR_STCX_CHECKS_ADDRESS) REST_GPR(6, r1) REST_GPR(0, r1) REST_GPR(1, r1) + .ifc \srr,srr RFI_TO_USER + .else + HRFI_TO_USER + .endif b . /* prevent speculative execution */ -.Lrestore_nvgprs: +.Lrestore_nvgprs_\srr\(): REST_NVGPRS(r1) - b .Lfast_user_interrupt_return + b .Lfast_user_interrupt_return_\srr .balign IFETCH_ALIGN_BYTES -.Lkernel_interrupt_return: +.Lkernel_interrupt_return_\srr\(): addi r3,r1,STACK_FRAME_OVERHEAD bl interrupt_exit_kernel_prepare -.Lfast_kernel_interrupt_return: +.Lfast_kernel_interrupt_return_\srr\(): cmpdi cr1,r3,0 ld r11,_NIP(r1) ld r12,_MSR(r1) + .ifc \srr,srr mtspr SPRN_SRR0,r11 mtspr SPRN_SRR1,r12 + .else + mtspr SPRN_HSRR0,r11 + mtspr SPRN_HSRR1,r12 + .endif BEGIN_FTR_SECTION stdcx. r0,0,r1 /* to clear the reservation */ @@ -757,7 +772,11 @@ ALT_FTR_SECTION_END_IFCLR(CPU_FTR_STCX_CHECKS_ADDRESS) REST_GPR(6, r1) REST_GPR(0, r1) REST_GPR(1, r1) + .ifc \srr,srr RFI_TO_KERNEL + .else + HRFI_TO_KERNEL + .endif b . /* prevent speculative execution */ 1: /* @@ -777,8 +796,18 @@ ALT_FTR_SECTION_END_IFCLR(CPU_FTR_STCX_CHECKS_ADDRESS) std r9,0(r1) /* perform store component of stdu */ ld r9,PACA_EXGEN+0(r13) + .ifc \srr,srr RFI_TO_KERNEL + .else + HRFI_TO_KERNEL + .endif b . /* prevent speculative execution */ +.endm + +interrupt_return_macro srr +#ifdef CONFIG_PPC_BOOK3S +interrupt_return_macro hsrr +#endif #ifdef CONFIG_PPC_RTAS /* |