On Fri, 09 May 2025 11:11:16 +0100, Oliver Upton <oliver.upton@xxxxxxxxx> wrote: > > On Wed, Apr 23, 2025 at 04:14:53PM +0100, Marc Zyngier wrote: > > If running a NV guest on an ARMv8.4-NV capable system, let's > > allocate an additional page that will be used by the hypervisor > > to fulfill system register accesses. > > > > Reviewed-by: Ganapatrao Kulkarni <gankulkarni@xxxxxxxxxxxxxxxxxxxxxx> > > Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx> > > --- > > arch/arm64/kvm/nested.c | 9 +++++++++ > > arch/arm64/kvm/reset.c | 1 + > > 2 files changed, 10 insertions(+) > > > > diff --git a/arch/arm64/kvm/nested.c b/arch/arm64/kvm/nested.c > > index 4a3fc11f7ecf3..884b3e25795c4 100644 > > --- a/arch/arm64/kvm/nested.c > > +++ b/arch/arm64/kvm/nested.c > > @@ -55,6 +55,12 @@ int kvm_vcpu_init_nested(struct kvm_vcpu *vcpu) > > !cpus_have_final_cap(ARM64_HAS_HCR_NV1)) > > return -EINVAL; > > > > + if (!vcpu->arch.ctxt.vncr_array) > > + vcpu->arch.ctxt.vncr_array = (u64 *)__get_free_page(GFP_KERNEL | __GFP_ZERO); > > Think you want GFP_KERNEL_ACCOUNT here. Yup, good point. I'll fold that in. Thanks, M. -- Without deviation from the norm, progress is not possible.
