[SRU B][PATCH] UBUNTU: SAUCE: Move SSBS snippet from arm64_elf_hwcaps to arm64_features
Ike Panhc
ike.pan at canonical.com
Fri Jan 22 05:29:25 UTC 2021
BugLink: https://launchpad.net/bugs/1911376
The SSBS snippet in arch/arm64/kernel/cpufeature.c shall be in
arm64_features not in arm64_elf_hwcaps. It seems when we backport
patch d71be2b6c0e1 ("arm64: cpufeature: Detect SSBS and advertise
to userspace") and put it in wrong place.
This problem does not affect ubuntu-focal kernel.
Signed-off-by: Ike Panhc <ike.pan at canonical.com>
---
arch/arm64/kernel/cpufeature.c | 26 +++++++++++++-------------
1 file changed, 13 insertions(+), 13 deletions(-)
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 63d44403d781..cbc61d9240a9 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -1194,6 +1194,19 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
.cpu_enable = cpu_clear_disr,
},
#endif /* CONFIG_ARM64_RAS_EXTN */
+#ifdef CONFIG_ARM64_SSBD
+ {
+ .desc = "Speculative Store Bypassing Safe (SSBS)",
+ .capability = ARM64_SSBS,
+ .type = ARM64_CPUCAP_WEAK_LOCAL_CPU_FEATURE,
+ .matches = has_cpuid_feature,
+ .sys_reg = SYS_ID_AA64PFR1_EL1,
+ .field_pos = ID_AA64PFR1_SSBS_SHIFT,
+ .sign = FTR_UNSIGNED,
+ .min_field_value = ID_AA64PFR1_SSBS_PSTATE_ONLY,
+ .cpu_enable = cpu_enable_ssbs,
+ },
+#endif
{},
};
@@ -1252,19 +1265,6 @@ static const struct arm64_cpu_capabilities arm64_elf_hwcaps[] = {
HWCAP_CAP(SYS_ID_AA64PFR1_EL1, ID_AA64PFR1_SSBS_SHIFT, FTR_UNSIGNED, ID_AA64PFR1_SSBS_PSTATE_INSNS, CAP_HWCAP, HWCAP_SSBS),
#ifdef CONFIG_ARM64_SVE
HWCAP_CAP(SYS_ID_AA64PFR0_EL1, ID_AA64PFR0_SVE_SHIFT, FTR_UNSIGNED, ID_AA64PFR0_SVE, CAP_HWCAP, HWCAP_SVE),
-#endif
-#ifdef CONFIG_ARM64_SSBD
- {
- .desc = "Speculative Store Bypassing Safe (SSBS)",
- .capability = ARM64_SSBS,
- .type = ARM64_CPUCAP_WEAK_LOCAL_CPU_FEATURE,
- .matches = has_cpuid_feature,
- .sys_reg = SYS_ID_AA64PFR1_EL1,
- .field_pos = ID_AA64PFR1_SSBS_SHIFT,
- .sign = FTR_UNSIGNED,
- .min_field_value = ID_AA64PFR1_SSBS_PSTATE_ONLY,
- .cpu_enable = cpu_enable_ssbs,
- },
#endif
{},
};
--
2.25.1
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