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| author |   Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-10-19 09:29:26 +0200 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2021-12-09 22:41:19 +1100 |
| commit | 42e03bc5240b75007682d9941ef672d12828fc70 (patch) | |
| tree | 1cf0f4339fb49bb48060580a0a263a79b7f7b8e8 /arch/powerpc/include/asm/book3s | |
| parent | powerpc/config: Add CONFIG_BOOKE_OR_40x (diff) | |
| download | linux-dev-42e03bc5240b75007682d9941ef672d12828fc70.tar.xz linux-dev-42e03bc5240b75007682d9941ef672d12828fc70.zip | |
powerpc/kuap: Prepare for supporting KUAP on BOOK3E/64
Also call kuap_lock() and kuap_save_and_lock() from
interrupt functions with CONFIG_PPC64.
For book3s/64 we keep them empty as it is done in assembly.
Also do the locked assert when switching task unless it is
book3s/64.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1cbf94e26e6d6e2e028fd687588a7e6622d454a6.1634627931.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/include/asm/book3s')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/kup.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/kup.h b/arch/powerpc/include/asm/book3s/64/kup.h index 503828709d55..69fcf63eec94 100644 --- a/arch/powerpc/include/asm/book3s/64/kup.h +++ b/arch/powerpc/include/asm/book3s/64/kup.h @@ -298,6 +298,15 @@ static inline unsigned long __kuap_get_and_assert_locked(void) return amr; } +/* Do nothing, book3s/64 does that in ASM */ +static inline void __kuap_lock(void) +{ +} + +static inline void __kuap_save_and_lock(struct pt_regs *regs) +{ +} + /* * We support individually allowing read or write, but we don't support nesting * because that would require an expensive read/modify write of the AMR. |