diff options
Diffstat (limited to 'tools/testing/selftests/kvm/include/x86_64/svm_util.h')
-rw-r--r-- | tools/testing/selftests/kvm/include/x86_64/svm_util.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/include/x86_64/svm_util.h b/tools/testing/selftests/kvm/include/x86_64/svm_util.h new file mode 100644 index 0000000000..044f0f872b --- /dev/null +++ b/tools/testing/selftests/kvm/include/x86_64/svm_util.h @@ -0,0 +1,65 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * tools/testing/selftests/kvm/include/x86_64/svm_utils.h + * Header for nested SVM testing + * + * Copyright (C) 2020, Red Hat, Inc. + */ + +#ifndef SELFTEST_KVM_SVM_UTILS_H +#define SELFTEST_KVM_SVM_UTILS_H + +#include <asm/svm.h> + +#include <stdint.h> +#include "svm.h" +#include "processor.h" + +struct svm_test_data { + /* VMCB */ + struct vmcb *vmcb; /* gva */ + void *vmcb_hva; + uint64_t vmcb_gpa; + + /* host state-save area */ + struct vmcb_save_area *save_area; /* gva */ + void *save_area_hva; + uint64_t save_area_gpa; + + /* MSR-Bitmap */ + void *msr; /* gva */ + void *msr_hva; + uint64_t msr_gpa; +}; + +static inline void vmmcall(void) +{ + /* + * Stuff RAX and RCX with "safe" values to make sure L0 doesn't handle + * it as a valid hypercall (e.g. Hyper-V L2 TLB flush) as the intended + * use of this function is to exit to L1 from L2. Clobber all other + * GPRs as L1 doesn't correctly preserve them during vmexits. + */ + __asm__ __volatile__("push %%rbp; vmmcall; pop %%rbp" + : : "a"(0xdeadbeef), "c"(0xbeefdead) + : "rbx", "rdx", "rsi", "rdi", "r8", "r9", + "r10", "r11", "r12", "r13", "r14", "r15"); +} + +#define stgi() \ + __asm__ __volatile__( \ + "stgi\n" \ + ) + +#define clgi() \ + __asm__ __volatile__( \ + "clgi\n" \ + ) + +struct svm_test_data *vcpu_alloc_svm(struct kvm_vm *vm, vm_vaddr_t *p_svm_gva); +void generic_svm_setup(struct svm_test_data *svm, void *guest_rip, void *guest_rsp); +void run_guest(struct vmcb *vmcb, uint64_t vmcb_gpa); + +int open_sev_dev_path_or_exit(void); + +#endif /* SELFTEST_KVM_SVM_UTILS_H */ |