diff options
| author | Andrew Donnellan <ajd@linux.ibm.com> | 2023-02-24 15:10:12 +1100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-04-20 13:21:46 +1000 |
| commit | df9cad09493808dca7d16a2fbcac1a78e8d412af (patch) | |
| tree | 155e3b93631ecfda14ba7d6961273ef16ce81555 /arch/powerpc | |
| parent | ae7312c09014fceb782a92cfb934e973f08b338f (diff) | |
powerpc/pseries: Add FW_FEATURE_PLPKS feature flag
Add a firmware feature flag, FW_FEATURE_PLPKS, to indicate availability of
Platform KeyStore related hcalls.
Check this flag in plpks_is_available() and pseries_plpks_init() before
trying to make an hcall.
Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230224041012.772648-1-ajd@linux.ibm.com
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/firmware.h | 4 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/firmware.c | 1 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/plpks.c | 5 |
3 files changed, 8 insertions, 2 deletions
diff --git a/arch/powerpc/include/asm/firmware.h b/arch/powerpc/include/asm/firmware.h index ed6db13a1d7c..69ae9cf57d50 100644 --- a/arch/powerpc/include/asm/firmware.h +++ b/arch/powerpc/include/asm/firmware.h @@ -56,6 +56,7 @@ #define FW_FEATURE_FORM2_AFFINITY ASM_CONST(0x0000020000000000) #define FW_FEATURE_ENERGY_SCALE_INFO ASM_CONST(0x0000040000000000) #define FW_FEATURE_WATCHDOG ASM_CONST(0x0000080000000000) +#define FW_FEATURE_PLPKS ASM_CONST(0x0000100000000000) #ifndef __ASSEMBLY__ @@ -77,7 +78,8 @@ enum { FW_FEATURE_DRC_INFO | FW_FEATURE_BLOCK_REMOVE | FW_FEATURE_PAPR_SCM | FW_FEATURE_ULTRAVISOR | FW_FEATURE_RPT_INVALIDATE | FW_FEATURE_FORM2_AFFINITY | - FW_FEATURE_ENERGY_SCALE_INFO | FW_FEATURE_WATCHDOG, + FW_FEATURE_ENERGY_SCALE_INFO | FW_FEATURE_WATCHDOG | + FW_FEATURE_PLPKS, FW_FEATURE_PSERIES_ALWAYS = 0, FW_FEATURE_POWERNV_POSSIBLE = FW_FEATURE_OPAL | FW_FEATURE_ULTRAVISOR, FW_FEATURE_POWERNV_ALWAYS = 0, diff --git a/arch/powerpc/platforms/pseries/firmware.c b/arch/powerpc/platforms/pseries/firmware.c index 080108d129ed..18447e5fa17d 100644 --- a/arch/powerpc/platforms/pseries/firmware.c +++ b/arch/powerpc/platforms/pseries/firmware.c @@ -68,6 +68,7 @@ hypertas_fw_features_table[] = { {FW_FEATURE_RPT_INVALIDATE, "hcall-rpt-invalidate"}, {FW_FEATURE_ENERGY_SCALE_INFO, "hcall-energy-scale-info"}, {FW_FEATURE_WATCHDOG, "hcall-watchdog"}, + {FW_FEATURE_PLPKS, "hcall-pks"}, }; /* Build up the firmware features bitmask using the contents of diff --git a/arch/powerpc/platforms/pseries/plpks.c b/arch/powerpc/platforms/pseries/plpks.c index 6f7bf3fc3aea..b0658ea3eccb 100644 --- a/arch/powerpc/platforms/pseries/plpks.c +++ b/arch/powerpc/platforms/pseries/plpks.c @@ -378,7 +378,7 @@ bool plpks_is_available(void) { int rc; - if (!firmware_has_feature(FW_FEATURE_LPAR)) + if (!firmware_has_feature(FW_FEATURE_PLPKS)) return false; rc = _plpks_get_config(); @@ -690,6 +690,9 @@ static __init int pseries_plpks_init(void) { int rc; + if (!firmware_has_feature(FW_FEATURE_PLPKS)) + return -ENODEV; + rc = _plpks_get_config(); if (rc) { |