Dave Martin 3fab39997a arm64/sve: Report SVE to userspace via CPUID only if supported ... Currently, the SVE field in ID_AA64PFR0_EL1 is visible unconditionally to userspace via the CPU ID register emulation, irrespective of the kernel config. This means that if a kernel configured with CONFIG_ARM64_SVE=n is run on SVE-capable hardware, userspace will see SVE reported as present in the ID regs even though the kernel forbids execution of SVE instructions. This patch makes the exposure of the SVE field in ID_AA64PFR0_EL1 conditional on CONFIG_ARM64_SVE=y. Since future architecture features are likely to encounter a similar requirement, this patch adds a suitable helper macros for use when declaring config-conditional ID register fields. Fixes: 43994d824e ("arm64/sve: Detect SVE and activate runtime support") Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com> Reported-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Dave Martin <Dave.Martin@arm.com> Cc: Suzuki Poulose <suzuki.poulose@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>		2017-12-14 15:14:30 +00:00
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asm	arm64/sve: Report SVE to userspace via CPUID only if supported	2017-12-14 15:14:30 +00:00
uapi/asm	arm64/bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type	2017-12-05 15:02:41 +01:00