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| author |  Christophe Leroy <christophe.leroy@c-s.fr>
| 2019-12-21 08:32:24 +0000 |
|---|---|---|
| committer |  Michael Ellerman <mpe@ellerman.id.au>
| 2020-01-26 22:15:09 +1100 |
| commit | 1ca9db5b6556c38aacac4c50a617aa3f7efbb306 (patch) | |
| tree | e30f1cceb941cbe5688530fecbdc3eb92b65a704 /arch/powerpc/kernel/head_booke.h | |
| parent | powerpc/32: Add EXCEPTION_PROLOG_0 in head_32.h (diff) | |
| download | linux-1ca9db5b6556c38aacac4c50a617aa3f7efbb306.tar.gz linux-1ca9db5b6556c38aacac4c50a617aa3f7efbb306.tar.bz2 linux-1ca9db5b6556c38aacac4c50a617aa3f7efbb306.zip | |
powerpc/32: save DEAR/DAR before calling handle_page_fault
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@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/3a4d58d378091086f00fde42b59610c80289e120.1576916812.git.christophe.leroy@c-s.fr
Diffstat (limited to 'arch/powerpc/kernel/head_booke.h')
| -rw-r--r-- | arch/powerpc/kernel/head_booke.h | 2 |
1 files changed, 2 insertions, 0 deletions
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 @@ label: 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 @@ label: 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) |