Re: [RFC PATCH] KVM: arm64: Treat FPEXC32_EL2 as a regular guest system register

On Wed, Sep 12, 2018 at 01:21:57PM +0200, Christoffer Dall wrote: > On Wed, Sep 12, 2018 at 12:16:26PM +0100, Dave Martin wrote: > > On Wed, Sep 12, 2018 at 12:17:04PM +0200, Christoffer Dall wrote: [...] > > > I think the point was actually to avoid saving/restoring FPEXC32_EL2 > > > when VFP

Re: [RFC PATCH] KVM: arm64: Treat FPEXC32_EL2 as a regular guest system register

On Wed, Sep 12, 2018 at 12:16:26PM +0100, Dave Martin wrote: > On Wed, Sep 12, 2018 at 12:17:04PM +0200, Christoffer Dall wrote: > > On Wed, Sep 05, 2018 at 02:19:13PM +0100, Dave Martin wrote: > > > Currently FPEXC32_EL2 is handled specially when context-switching. > > > This made sense for arm,

Re: [RFC PATCH] KVM: arm64: Treat FPEXC32_EL2 as a regular guest system register

On Wed, Sep 12, 2018 at 12:17:04PM +0200, Christoffer Dall wrote: > On Wed, Sep 05, 2018 at 02:19:13PM +0100, Dave Martin wrote: > > Currently FPEXC32_EL2 is handled specially when context-switching. > > This made sense for arm, where FPEXC affects host execution > > (including VFP/SIMD register

Re: [RFC PATCH] KVM: arm64: Treat FPEXC32_EL2 as a regular guest system register

On Wed, Sep 05, 2018 at 02:19:13PM +0100, Dave Martin wrote: > Currently FPEXC32_EL2 is handled specially when context-switching. > This made sense for arm, where FPEXC affects host execution > (including VFP/SIMD register save/restore at Hyp). I think the point was actually to avoid