summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorAndrew Donnellan <ajd@linux.ibm.com>2023-02-24 07:10:12 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2023-04-20 06:21:46 +0300
commitdf9cad09493808dca7d16a2fbcac1a78e8d412af (patch)
tree155e3b93631ecfda14ba7d6961273ef16ce81555
parentae7312c09014fceb782a92cfb934e973f08b338f (diff)
downloadlinux-df9cad09493808dca7d16a2fbcac1a78e8d412af.tar.xz
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
-rw-r--r--arch/powerpc/include/asm/firmware.h4
-rw-r--r--arch/powerpc/platforms/pseries/firmware.c1
-rw-r--r--arch/powerpc/platforms/pseries/plpks.c5
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) {