diff options
| author | Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> | 2021-10-06 01:55:24 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-10-27 09:59:33 +0200 |
| commit | 663e89b7f4cc04183b5fe2a8d63a80b815e6712a (patch) | |
| tree | 290cb007de6cd78932bd22a051c86d24d7a0226f /arch | |
| parent | 23d127cf5e66742f62f053130771b0ce82cf4b1c (diff) | |
powerpc/security: Add a helper to query stf_barrier type
[ Upstream commit 030905920f32e91a52794937f67434ac0b3ea41a ]
Add a helper to return the stf_barrier type for the current processor.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/3bd5d7f96ea1547991ac2ce3137dc2b220bae285.1633464148.git.naveen.n.rao@linux.vnet.ibm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/include/asm/security_features.h | 5 | ||||
| -rw-r--r-- | arch/powerpc/kernel/security.c | 5 |
2 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/security_features.h b/arch/powerpc/include/asm/security_features.h index 792eefaf230b..27574f218b37 100644 --- a/arch/powerpc/include/asm/security_features.h +++ b/arch/powerpc/include/asm/security_features.h @@ -39,6 +39,11 @@ static inline bool security_ftr_enabled(u64 feature) return !!(powerpc_security_features & feature); } +#ifdef CONFIG_PPC_BOOK3S_64 +enum stf_barrier_type stf_barrier_type_get(void); +#else +static inline enum stf_barrier_type stf_barrier_type_get(void) { return STF_BARRIER_NONE; } +#endif // Features indicating support for Spectre/Meltdown mitigations diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c index cc51fa52e783..e723ff77cc9b 100644 --- a/arch/powerpc/kernel/security.c +++ b/arch/powerpc/kernel/security.c @@ -263,6 +263,11 @@ static int __init handle_no_stf_barrier(char *p) early_param("no_stf_barrier", handle_no_stf_barrier); +enum stf_barrier_type stf_barrier_type_get(void) +{ + return stf_enabled_flush_types; +} + /* This is the generic flag used by other architectures */ static int __init handle_ssbd(char *p) { |