4.9-stable review patch. If anyone has any objections, please let me know.
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From: Mauricio Faria de Oliveira mauricfo@linux.vnet.ibm.com
commit e7347a86830f38dc3e40c8f7e28c04412b12a2e7 upstream.
This moves the definition of the default security feature flags (i.e., enabled by default) closer to the security feature flags.
This can be used to restore current flags to the default flags.
Signed-off-by: Mauricio Faria de Oliveira mauricfo@linux.vnet.ibm.com Signed-off-by: Michael Ellerman mpe@ellerman.id.au Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/powerpc/include/asm/security_features.h | 8 ++++++++ arch/powerpc/kernel/security.c | 7 +------ 2 files changed, 9 insertions(+), 6 deletions(-)
--- a/arch/powerpc/include/asm/security_features.h +++ b/arch/powerpc/include/asm/security_features.h @@ -63,4 +63,12 @@ static inline bool security_ftr_enabled( // Firmware configuration indicates user favours security over performance #define SEC_FTR_FAVOUR_SECURITY 0x0000000000000200ull
+ +// Features enabled by default +#define SEC_FTR_DEFAULT \ + (SEC_FTR_L1D_FLUSH_HV | \ + SEC_FTR_L1D_FLUSH_PR | \ + SEC_FTR_BNDS_CHK_SPEC_BAR | \ + SEC_FTR_FAVOUR_SECURITY) + #endif /* _ASM_POWERPC_SECURITY_FEATURES_H */ --- a/arch/powerpc/kernel/security.c +++ b/arch/powerpc/kernel/security.c @@ -11,12 +11,7 @@ #include <asm/security_features.h>
-unsigned long powerpc_security_features __read_mostly = \ - SEC_FTR_L1D_FLUSH_HV | \ - SEC_FTR_L1D_FLUSH_PR | \ - SEC_FTR_BNDS_CHK_SPEC_BAR | \ - SEC_FTR_FAVOUR_SECURITY; - +unsigned long powerpc_security_features __read_mostly = SEC_FTR_DEFAULT;
ssize_t cpu_show_meltdown(struct device *dev, struct device_attribute *attr, char *buf) {