Re: [PATCH 06/10] KVM: arm64: Map SVE context at EL2 when available
From: Marc Zyngier <maz@kernel.org>
Date: 2021-03-18 08:58:37
Also in:
kvm, kvmarm
On Wed, 17 Mar 2021 16:01:12 +0000, Will Deacon [off-list ref] wrote:
On Tue, Mar 16, 2021 at 10:13:08AM +0000, Marc Zyngier wrote:quoted
When running on nVHE, and that the vcpu supports SVE, map the SVE state at EL2 so that KVM can access it. Signed-off-by: Marc Zyngier <maz@kernel.org> --- arch/arm64/kvm/fpsimd.c | 11 +++++++++++ 1 file changed, 11 insertions(+)diff --git a/arch/arm64/kvm/fpsimd.c b/arch/arm64/kvm/fpsimd.c index b7e36a506d3d..84afca5ed6f2 100644 --- a/arch/arm64/kvm/fpsimd.c +++ b/arch/arm64/kvm/fpsimd.c@@ -43,6 +43,17 @@ int kvm_arch_vcpu_run_map_fp(struct kvm_vcpu *vcpu) if (ret) goto error; + if (vcpu->arch.sve_state) { + void *sve_end; + + sve_end = vcpu->arch.sve_state + vcpu_sve_state_size(vcpu) + 1;Why do you need the '+ 1' here?
Only the need to add off-by-one bugs once in a while. I'll fix that in the next round. Thanks, M. -- Without deviation from the norm, progress is not possible. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel