On Mon, Dec 05, 2022 at 11:14:30AM -0800, Vipin Sharma wrote: > Hyper-V extended hypercalls by default exit to userspace. Verify > userspace gets the call, update the result and then verify in guest > correct result is received. > > Signed-off-by: Vipin Sharma <vipinsh@xxxxxxxxxx> Signed-off-by: David Matlack <dmatlack@xxxxxxxxxx> > --- [...] > +++ b/tools/testing/selftests/kvm/x86_64/hyperv_extended_hypercalls.c > @@ -0,0 +1,93 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Test Hyper-V extended hypercall, HV_EXT_CALL_QUERY_CAPABILITIES (0x8001), > + * exit to userspace and receive result in guest. > + * > + * Negative tests are present in hyperv_features.c > + * > + * Copyright 2022 Google LLC > + * Author: Vipin Sharma <vipinsh@xxxxxxxxxx> > + */ > + > +#include "kvm_util.h" > +#include "processor.h" > +#include "hyperv.h" > + > +/* Any value is fine */ > +#define EXT_CAPABILITIES 0xbull > + > +static void guest_code(vm_vaddr_t in_pg_gpa, vm_vaddr_t out_pg_gpa, > + vm_vaddr_t out_pg_gva) nit: Use vm_paddr_t for guest physical addresses.
