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authorJames Morse <james.morse@arm.com>2018-01-15 19:39:01 +0000
committerCatalin Marinas <catalin.marinas@arm.com>2018-01-16 15:08:41 +0000
commit4715c14bc136687bb79d12e24aafdc0f38786eb7 (patch)
treeeb35b59c2d79f731c1aacb722cead88cbe67b9c8 /sound
parent4f5abad9e826bd579b0661efa32682d9c9bc3fa8 (diff)
downloadlinux-4715c14bc136687bb79d12e24aafdc0f38786eb7.tar.bz2
KVM: arm64: Set an impdef ESR for Virtual-SError using VSESR_EL2.
Prior to v8.2's RAS Extensions, the HCR_EL2.VSE 'virtual SError' feature generated an SError with an implementation defined ESR_EL1.ISS, because we had no mechanism to specify the ESR value. On Juno this generates an all-zero ESR, the most significant bit 'ISV' is clear indicating the remainder of the ISS field is invalid. With the RAS Extensions we have a mechanism to specify this value, and the most significant bit has a new meaning: 'IDS - Implementation Defined Syndrome'. An all-zero SError ESR now means: 'RAS error: Uncategorized' instead of 'no valid ISS'. Add KVM support for the VSESR_EL2 register to specify an ESR value when HCR_EL2.VSE generates a virtual SError. Change kvm_inject_vabt() to specify an implementation-defined value. We only need to restore the VSESR_EL2 value when HCR_EL2.VSE is set, KVM save/restores this bit during __{,de}activate_traps() and hardware clears the bit once the guest has consumed the virtual-SError. Future patches may add an API (or KVM CAP) to pend a virtual SError with a specified ESR. Cc: Dongjiu Geng <gengdongjiu@huawei.com> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: James Morse <james.morse@arm.com> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'sound')
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