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authorSuzuki K Poulose <suzuki.poulose@arm.com>2016-11-08 16:56:20 +0300
committerCatalin Marinas <catalin.marinas@arm.com>2016-11-16 20:50:51 +0300
commita4023f682739439b434165b54af7cb3676a4766e (patch)
treeef2638d37291c56d972f20b69c59a6dee9292c18 /arch/arm64/kvm/hyp/hyp-entry.S
parentc02433dd6de32f042cf3ffe476746b1115b8c096 (diff)
downloadlinux-a4023f682739439b434165b54af7cb3676a4766e.tar.xz
arm64: Add hypervisor safe helper for checking constant capabilities
The hypervisor may not have full access to the kernel data structures and hence cannot safely use cpus_have_cap() helper for checking the system capability. Add a safe helper for hypervisors to check a constant system capability, which *doesn't* fall back to checking the bitmap maintained by the kernel. With this, make the cpus_have_cap() only check the bitmask and force constant cap checks to use the new API for quicker checks. Cc: Robert Ritcher <rritcher@cavium.com> Cc: Tirumalesh Chalamarla <tchalamarla@cavium.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Reviewed-by: Will Deacon <will.deacon@arm.com> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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