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| author |   Julien Thierry <julien.thierry@arm.com> | 2019-01-31 14:58:41 +0000 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2019-02-06 10:05:17 +0000 |
| commit | c9bfdf734d4c0e7dc25f39dd636ba1952994865a (patch) | |
| tree | 2ee6f506650da9d5079b6a6769b9718b8cf4e3e5 /arch/arm64/kernel/cpufeature.c | |
| parent | arm64: Remove unused daif related functions/macros (diff) | |
| download | linux-dev-c9bfdf734d4c0e7dc25f39dd636ba1952994865a.tar.xz linux-dev-c9bfdf734d4c0e7dc25f39dd636ba1952994865a.zip | |
arm64: cpufeature: Set SYSREG_GIC_CPUIF as a boot system feature
It is not supported to have some CPUs using GICv3 sysreg CPU interface
while some others do not.
Once ICC_SRE_EL1.SRE is set on a CPU, the bit cannot be cleared. Since
matching this feature require setting ICC_SRE_EL1.SRE, it cannot be
turned off if found on a CPU.
Set the feature as STRICT_BOOT, if boot CPU has it, all other CPUs are
required to have it.
Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Suggested-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/kernel/cpufeature.c')
| -rw-r--r-- | arch/arm64/kernel/cpufeature.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index f6d84e2c92fe..b9c0adf71a54 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1207,7 +1207,7 @@ static const struct arm64_cpu_capabilities arm64_features[] = { { .desc = "GIC system register CPU interface", .capability = ARM64_HAS_SYSREG_GIC_CPUIF, - .type = ARM64_CPUCAP_SYSTEM_FEATURE, + .type = ARM64_CPUCAP_STRICT_BOOT_CPU_FEATURE, .matches = has_useable_gicv3_cpuif, .sys_reg = SYS_ID_AA64PFR0_EL1, .field_pos = ID_AA64PFR0_GIC_SHIFT, |