Re: [PATCH v2 1/2] x86/fpu: Combine fpu_ctxt and xsave_area in arch_vcpu

On Mon Aug 12, 2024 at 4:16 PM BST, Jan Beulich wrote: > On 08.08.2024 15:41, Alejandro Vallejo wrote: > > --- a/xen/arch/x86/domctl.c > > +++ b/xen/arch/x86/domctl.c > > @@ -1344,7 +1344,10 @@ void arch_get_info_guest(struct vcpu *v, > > vcpu_guest_context_u c) > > #define c(fld) (c.nat->fld) >

Re: [PATCH v2 1/2] x86/fpu: Combine fpu_ctxt and xsave_area in arch_vcpu

On 08.08.2024 15:41, Alejandro Vallejo wrote: > --- a/xen/arch/x86/domctl.c > +++ b/xen/arch/x86/domctl.c > @@ -1344,7 +1344,10 @@ void arch_get_info_guest(struct vcpu *v, > vcpu_guest_context_u c) > #define c(fld) (c.nat->fld) > #endif > > -memcpy(&c.nat->fpu_ctxt, v->arch.fpu_ctxt, sizeo

[PATCH v2 1/2] x86/fpu: Combine fpu_ctxt and xsave_area in arch_vcpu

fpu_ctxt is either a pointer to the legacy x87/SSE save area (used by FXSAVE) or a pointer aliased with xsave_area that points to its fpu_sse subfield. Such subfield is at the base and is identical in size and layout to the legacy buffer. This patch merges the 2 pointers in the arch_vcpu into a si