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| author |   Christophe Leroy <christophe.leroy@csgroup.eu> | 2020-11-08 16:57:37 +0000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-11-19 16:56:55 +1100 |
| commit | 62182e6c0faf75117f8d1719c118bb5fc8574012 (patch) | |
| tree | 99ff8165f1d6a1f11712188bea342a7794784a36 /arch/powerpc/kernel/head_32.h | |
| parent | powerpc: Replace RFI by rfi on book3s/32 and booke (diff) | |
| download | linux-dev-62182e6c0faf75117f8d1719c118bb5fc8574012.tar.xz linux-dev-62182e6c0faf75117f8d1719c118bb5fc8574012.zip | |
powerpc: Remove RFI macro
RFI macro is just there to add an infinite loop past
rfi in order to avoid prefetch on 40x in half a dozen
of places in entry_32 and head_32.
Those places are already full of #ifdefs, so just add a
few more to explicitely show those loops and remove RFI.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/f7e9cb9e9240feec63cb330abf40b67d1aad852f.1604854583.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/kernel/head_32.h')
| -rw-r--r-- | arch/powerpc/kernel/head_32.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/head_32.h b/arch/powerpc/kernel/head_32.h index 7c767765071d..232000742c9a 100644 --- a/arch/powerpc/kernel/head_32.h +++ b/arch/powerpc/kernel/head_32.h @@ -222,7 +222,10 @@ #endif mtspr SPRN_SRR1,r10 mtspr SPRN_SRR0,r11 - RFI /* jump to handler, enable MMU */ + rfi /* jump to handler, enable MMU */ +#ifdef CONFIG_40x + b . /* Prevent prefetch past rfi */ +#endif 99: b ret_from_kernel_syscall .endm |