[PATCH v4 30/40] KVM: arm64: Defer saving/restoring 32-bit sysregs to vcpu load/put
From: Christoffer Dall <hidden>
Date: 2018-02-22 18:15:20
Also in:
kvm, kvmarm
From: Christoffer Dall <hidden>
Date: 2018-02-22 18:15:20
Also in:
kvm, kvmarm
On Wed, Feb 21, 2018 at 04:27:25PM +0000, Marc Zyngier wrote:
On Thu, 15 Feb 2018 21:03:22 +0000, Christoffer Dall wrote:quoted
When running a 32-bit VM (EL1 in AArch32), the AArch32 system registers can be deferred to vcpu load/put on VHE systems because neither the host kernel nor host userspace uses these registers. Note that we can not defer saving DBGVCR32_EL2 conditionally based on the state of the debug dirty flag on VHE, but since we do the load/put pretty rarely, this comes out as a win anyway.I'm not sure I understand that comment. We don't have any deferring for this register, so the load/put reference seems out of place.
Yeah, this is a patch description editing snafu. I'll fix it. Thanks, -Christoffer