On Thursday 11 Mar 2021 at 10:37:28 (+0000), Quentin Perret wrote: > On Thursday 04 Mar 2021 at 11:54:48 (+0000), 'Andrew Scull' via kernel-team > wrote: > > Keep track of the cpu that a vcpu's FP state was last loaded onto. This > > information is needed in order to tell whether a vcpu's latest FP state > > is already loaded on a cpu to avoid unnecessary reloading. > > > > The method follows the pattern used by thread_struct whereby an > > fpsimd_cpu field is added and updated when the state is loaded. > > > > Signed-off-by: Andrew Scull <[email protected]> > > Cc: Dave Martin <[email protected]> > > --- > > arch/arm64/include/asm/kvm_host.h | 1 + > > arch/arm64/kvm/arm.c | 2 ++ > > arch/arm64/kvm/hyp/include/hyp/switch.h | 2 ++ > > 3 files changed, 5 insertions(+) > > > > diff --git a/arch/arm64/include/asm/kvm_host.h > > b/arch/arm64/include/asm/kvm_host.h > > index 8a559fa2f237..a01194371ae5 100644 > > --- a/arch/arm64/include/asm/kvm_host.h > > +++ b/arch/arm64/include/asm/kvm_host.h > > @@ -306,6 +306,7 @@ struct kvm_vcpu_arch { > > struct kvm_guest_debug_arch vcpu_debug_state; > > struct kvm_guest_debug_arch external_debug_state; > > > > + int fpsimd_cpu; > > struct user_fpsimd_state *host_fpsimd_state; /* hyp VA */ > > > > struct { > > diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c > > index e3edea8379f3..87141c8d63e6 100644 > > --- a/arch/arm64/kvm/arm.c > > +++ b/arch/arm64/kvm/arm.c > > @@ -313,6 +313,8 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu) > > > > vcpu->arch.mmu_page_cache.gfp_zero = __GFP_ZERO; > > > > + vcpu->arch.fpsimd_cpu = NR_CPUS; > > Is this supposed to be an invalid CPU number? If so, then NR_CPUS + 1 ?
Obviously not, forget me. _______________________________________________ kvmarm mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
