On Mon, May 12, 2025 at 03:52:44AM -0700, Ganapatrao Kulkarni wrote: > Add simple test to run guest code with NV enabled. With NV enabled, > guest code runs in vEL2 context. > > Signed-off-by: Ganapatrao Kulkarni <[email protected]> > --- > .../selftests/kvm/arm64/nv_guest_hypervisor.c | 68 +++++++++++++++++++ > 1 file changed, 68 insertions(+) > create mode 100644 tools/testing/selftests/kvm/arm64/nv_guest_hypervisor.c > > diff --git a/tools/testing/selftests/kvm/arm64/nv_guest_hypervisor.c > b/tools/testing/selftests/kvm/arm64/nv_guest_hypervisor.c > new file mode 100644 > index 000000000000..7d7b3944e229 > --- /dev/null > +++ b/tools/testing/selftests/kvm/arm64/nv_guest_hypervisor.c > @@ -0,0 +1,68 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Copyright (c) 2025 Ampere Computing LLC > + */ > +#include <kvm_util.h> > +#include <nv_util.h> > +#include <processor.h> > + > +static void guest_code(void) > +{ > + if (read_sysreg(CurrentEL) == CurrentEL_EL2) > + GUEST_PRINTF("Test PASS\n"); > + else > + GUEST_FAIL("Fail to run in vEL2\n"); > + > + GUEST_DONE(); > +} > + > +static void guest_undef_handler(struct ex_regs *regs) > +{ > + GUEST_FAIL("Unexpected exception far_el1 = 0x%lx", > read_sysreg(far_el1)); > +} > + > +static void test_run_vcpu(struct kvm_vcpu *vcpu) > +{ > + struct ucall uc; > + > + do { > + vcpu_run(vcpu); > + > + switch (get_ucall(vcpu, &uc)) { > + case UCALL_ABORT: > + REPORT_GUEST_ASSERT(uc); > + break; > + case UCALL_PRINTF: > + printf("%s", uc.buffer); > + break; > + case UCALL_DONE: > + break; > + default: > + TEST_FAIL("Unknown ucall %lu", uc.cmd); > + } > + } while (uc.cmd != UCALL_DONE); > +} > + > +static void test_nv_guest_hypervisor(void) > +{ > + struct kvm_vcpu *vcpu; > + struct kvm_vm *vm; > + int gic_fd = -1; > + > + vm = nv_vm_create_with_vcpus_gic(1, &vcpu, &gic_fd, guest_code); > + vm_init_descriptor_tables(vm); > + vcpu_init_descriptor_tables(vcpu); > + vm_install_sync_handler(vm, VECTOR_SYNC_CURRENT, > + ESR_ELx_EC_UNKNOWN, guest_undef_handler); > + > + test_run_vcpu(vcpu); > + > + vgic_v3_close(gic_fd); > + kvm_vm_free(vm); > +} > + > +int main(int argc, char *argv[]) > +{ > + test_nv_guest_hypervisor(); > + return 0; > +}
The kernel this v2 series applied is based off of the latest kvmarm-next and tested this on QEMU TCG mode with the kvm-arm.mode=nested option added at boot. Tested-by: Itaru Kitayama <[email protected]> > -- > 2.48.1 >
