handle_page_fault() is the only function that save DAR/DEAR itself. Save DAR/DEAR before calling handle_page_fault() to prepare for VMAP stack which will require to save even before. Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxx> --- arch/powerpc/kernel/entry_32.S | 1 - arch/powerpc/kernel/head_32.S | 2 ++ arch/powerpc/kernel/head_40x.S | 2 ++ arch/powerpc/kernel/head_8xx.S | 2 ++ arch/powerpc/kernel/head_booke.h | 2 ++ arch/powerpc/kernel/head_fsl_booke.S | 1 + 6 files changed, 9 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S index 6273b4862482..317ad9df8ba8 100644 --- a/arch/powerpc/kernel/entry_32.S +++ b/arch/powerpc/kernel/entry_32.S @@ -621,7 +621,6 @@ ppc_swapcontext: */ .globl handle_page_fault handle_page_fault: - stw r4,_DAR(r1) addi r3,r1,STACK_FRAME_OVERHEAD #ifdef CONFIG_PPC_BOOK3S_32 andis. r0,r5,DSISR_DABRMATCH@h diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S index 9e868567b716..bebb49d877f2 100644 --- a/arch/powerpc/kernel/head_32.S +++ b/arch/powerpc/kernel/head_32.S @@ -310,6 +310,7 @@ BEGIN_MMU_FTR_SECTION END_MMU_FTR_SECTION_IFSET(MMU_FTR_HPTE_TABLE) 1: lwz r5,_DSISR(r11) /* get DSISR value */ mfspr r4,SPRN_DAR + stw r4, _DAR(r11) EXC_XFER_LITE(0x300, handle_page_fault) @@ -327,6 +328,7 @@ BEGIN_MMU_FTR_SECTION END_MMU_FTR_SECTION_IFSET(MMU_FTR_HPTE_TABLE) 1: mr r4,r12 andis. r5,r9,DSISR_SRR1_MATCH_32S@h /* Filter relevant SRR1 bits */ + stw r4, _DAR(r11) EXC_XFER_LITE(0x400, handle_page_fault) /* External interrupt */ diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S index 585ea1976550..9bb663977e84 100644 --- a/arch/powerpc/kernel/head_40x.S +++ b/arch/powerpc/kernel/head_40x.S @@ -313,6 +313,7 @@ _ENTRY(saved_ksp_limit) START_EXCEPTION(0x0400, InstructionAccess) EXCEPTION_PROLOG mr r4,r12 /* Pass SRR0 as arg2 */ + stw r4, _DEAR(r11) li r5,0 /* Pass zero as arg3 */ EXC_XFER_LITE(0x400, handle_page_fault) @@ -676,6 +677,7 @@ DataAccess: mfspr r5,SPRN_ESR /* Grab the ESR, save it, pass arg3 */ stw r5,_ESR(r11) mfspr r4,SPRN_DEAR /* Grab the DEAR, save it, pass arg2 */ + stw r4, _DEAR(r11) EXC_XFER_LITE(0x300, handle_page_fault) /* Other PowerPC processors, namely those derived from the 6xx-series diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index dac7c0a34eea..fb284d95c76a 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -486,6 +486,7 @@ InstructionTLBError: tlbie r4 /* 0x400 is InstructionAccess exception, needed by bad_page_fault() */ .Litlbie: + stw r4, _DAR(r11) EXC_XFER_LITE(0x400, handle_page_fault) /* This is the data TLB error on the MPC8xx. This could be due to @@ -504,6 +505,7 @@ DARFixed:/* Return from dcbx instruction bug workaround */ mfspr r5,SPRN_DSISR stw r5,_DSISR(r11) mfspr r4,SPRN_DAR + stw r4, _DAR(r11) andis. r10,r5,DSISR_NOHPTE@h beq+ .Ldtlbie tlbie r4 diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h index 2ae635df9026..37fc84ed90e3 100644 --- a/arch/powerpc/kernel/head_booke.h +++ b/arch/powerpc/kernel/head_booke.h @@ -467,6 +467,7 @@ ALT_FTR_SECTION_END_IFSET(CPU_FTR_EMB_HV) mfspr r5,SPRN_ESR; /* Grab the ESR and save it */ \ stw r5,_ESR(r11); \ mfspr r4,SPRN_DEAR; /* Grab the DEAR */ \ + stw r4, _DEAR(r11); \ EXC_XFER_LITE(0x0300, handle_page_fault) #define INSTRUCTION_STORAGE_EXCEPTION \ @@ -475,6 +476,7 @@ ALT_FTR_SECTION_END_IFSET(CPU_FTR_EMB_HV) mfspr r5,SPRN_ESR; /* Grab the ESR and save it */ \ stw r5,_ESR(r11); \ mr r4,r12; /* Pass SRR0 as arg2 */ \ + stw r4, _DEAR(r11); \ li r5,0; /* Pass zero as arg3 */ \ EXC_XFER_LITE(0x0400, handle_page_fault) diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S index 838d9d4650c7..89fa02395a43 100644 --- a/arch/powerpc/kernel/head_fsl_booke.S +++ b/arch/powerpc/kernel/head_fsl_booke.S @@ -378,6 +378,7 @@ interrupt_base: mfspr r4,SPRN_DEAR /* Grab the DEAR, save it, pass arg2 */ andis. r10,r5,(ESR_ILK|ESR_DLK)@h bne 1f + stw r4, _DEAR(r11) EXC_XFER_LITE(0x0300, handle_page_fault) 1: addi r3,r1,STACK_FRAME_OVERHEAD -- 2.13.3
