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| author | Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> | 2021-11-15 16:36:29 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-18 14:04:30 +0100 |
| commit | 7fcf86565bb67de1118b446397b5670fc69d3f51 (patch) | |
| tree | 61eafe49e9358fd1a204109a42edb19c8499095d /arch | |
| parent | 951fb7bf387fdb65712d53c48ac6a90ec258173f (diff) | |
| download | linux-stable-7fcf86565bb67de1118b446397b5670fc69d3f51.tar.gz linux-stable-7fcf86565bb67de1118b446397b5670fc69d3f51.tar.bz2 linux-stable-7fcf86565bb67de1118b446397b5670fc69d3f51.zip | |
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: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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 b774a4477d5f..e380acc6e413 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 e4e1a94ccf6a..3f510c911b10 100644 --- a/arch/powerpc/kernel/security.c +++ b/arch/powerpc/kernel/security.c @@ -261,6 +261,11 @@ 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) { |