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Sampat" , Reinette Chatre , Ira Weiny Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Content-Type: text/plain; charset="UTF-8" From: Ackerley Tng TDX guests' registers cannot be initialized directly using vcpu_regs_set(), hence the stack pointer needs to be initialized by the guest itself, running boot code beginning at the reset vector. Store the stack address as part of struct kvm_vcpu so that it can be accessible later to be passed to the boot code for rsp initialization. Signed-off-by: Ackerley Tng Signed-off-by: Sagi Shahar --- tools/testing/selftests/kvm/include/kvm_util.h | 1 + tools/testing/selftests/kvm/lib/x86/processor.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h index 9994861d2acb..5c4ca25803ac 100644 --- a/tools/testing/selftests/kvm/include/kvm_util.h +++ b/tools/testing/selftests/kvm/include/kvm_util.h @@ -58,6 +58,7 @@ struct kvm_vcpu { int fd; struct kvm_vm *vm; struct kvm_run *run; + vm_vaddr_t initial_stack_addr; #ifdef __x86_64__ struct kvm_cpuid2 *cpuid; #endif diff --git a/tools/testing/selftests/kvm/lib/x86/processor.c b/tools/testing/selftests/kvm/lib/x86/processor.c index 002303e2a572..da6e9315ebe2 100644 --- a/tools/testing/selftests/kvm/lib/x86/processor.c +++ b/tools/testing/selftests/kvm/lib/x86/processor.c @@ -694,6 +694,8 @@ struct kvm_vcpu *vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id) vcpu_init_sregs(vm, vcpu); vcpu_init_xcrs(vm, vcpu); + vcpu->initial_stack_addr = stack_vaddr; + /* Setup guest general purpose registers */ vcpu_regs_get(vcpu, ®s); regs.rflags = regs.rflags | 0x2; -- 2.51.0.rc0.155.g4a0f42376b-goog