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 <asc...@google.com> > Cc: Dave Martin <dave.mar...@arm.com> > --- > 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 ? Thanks, Quentin _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm