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| author | Dave Martin <Dave.Martin@arm.com> | 2017-10-31 15:51:17 +0000 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2017-11-03 15:24:20 +0000 |
| commit | aac45ffd1f8eff7b919df3deaa06d872b665eb09 (patch) | |
| tree | 4d5c01485825e901423b24562d3dcb57b1a68979 /arch/arm64/kvm/handle_exit.c | |
| parent | 17eed27b02da88560b4592390952b9a71042ab8b (diff) | |
| download | lwn-aac45ffd1f8eff7b919df3deaa06d872b665eb09.tar.gz lwn-aac45ffd1f8eff7b919df3deaa06d872b665eb09.zip | |
arm64/sve: KVM: Treat guest SVE use as undefined instruction execution
When trapping forbidden attempts by a guest to use SVE, we want the
guest to see a trap consistent with SVE not being implemented.
This patch injects an undefined instruction exception into the
guest in response to such an exception.
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/kvm/handle_exit.c')
| -rw-r--r-- | arch/arm64/kvm/handle_exit.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c index 7debb74843a0..b71247995469 100644 --- a/arch/arm64/kvm/handle_exit.c +++ b/arch/arm64/kvm/handle_exit.c @@ -147,6 +147,13 @@ static int kvm_handle_unknown_ec(struct kvm_vcpu *vcpu, struct kvm_run *run) return 1; } +static int handle_sve(struct kvm_vcpu *vcpu, struct kvm_run *run) +{ + /* Until SVE is supported for guests: */ + kvm_inject_undefined(vcpu); + return 1; +} + static exit_handle_fn arm_exit_handlers[] = { [0 ... ESR_ELx_EC_MAX] = kvm_handle_unknown_ec, [ESR_ELx_EC_WFx] = kvm_handle_wfx, @@ -160,6 +167,7 @@ static exit_handle_fn arm_exit_handlers[] = { [ESR_ELx_EC_HVC64] = handle_hvc, [ESR_ELx_EC_SMC64] = handle_smc, [ESR_ELx_EC_SYS64] = kvm_handle_sys_reg, + [ESR_ELx_EC_SVE] = handle_sve, [ESR_ELx_EC_IABT_LOW] = kvm_handle_guest_abort, [ESR_ELx_EC_DABT_LOW] = kvm_handle_guest_abort, [ESR_ELx_EC_SOFTSTP_LOW]= kvm_handle_guest_debug, |