1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * tools/testing/selftests/kvm/include/x86_64/svm_utils.h 4 * Header for nested SVM testing 5 * 6 * Copyright (C) 2020, Red Hat, Inc. 7 */ 8 9 #ifndef SELFTEST_KVM_SVM_UTILS_H 10 #define SELFTEST_KVM_SVM_UTILS_H 11 12 #include <asm/svm.h> 13 14 #include <stdint.h> 15 #include "svm.h" 16 #include "processor.h" 17 18 struct svm_test_data { 19 /* VMCB */ 20 struct vmcb *vmcb; /* gva */ 21 void *vmcb_hva; 22 uint64_t vmcb_gpa; 23 24 /* host state-save area */ 25 struct vmcb_save_area *save_area; /* gva */ 26 void *save_area_hva; 27 uint64_t save_area_gpa; 28 29 /* MSR-Bitmap */ 30 void *msr; /* gva */ 31 void *msr_hva; 32 uint64_t msr_gpa; 33 }; 34 35 static inline void vmmcall(void) 36 { 37 /* 38 * Stuff RAX and RCX with "safe" values to make sure L0 doesn't handle 39 * it as a valid hypercall (e.g. Hyper-V L2 TLB flush) as the intended 40 * use of this function is to exit to L1 from L2. Clobber all other 41 * GPRs as L1 doesn't correctly preserve them during vmexits. 42 */ 43 __asm__ __volatile__("push %%rbp; vmmcall; pop %%rbp" 44 : : "a"(0xdeadbeef), "c"(0xbeefdead) 45 : "rbx", "rdx", "rsi", "rdi", "r8", "r9", 46 "r10", "r11", "r12", "r13", "r14", "r15"); 47 } 48 49 #define stgi() \ 50 __asm__ __volatile__( \ 51 "stgi\n" \ 52 ) 53 54 #define clgi() \ 55 __asm__ __volatile__( \ 56 "clgi\n" \ 57 ) 58 59 struct svm_test_data *vcpu_alloc_svm(struct kvm_vm *vm, vm_vaddr_t *p_svm_gva); 60 void generic_svm_setup(struct svm_test_data *svm, void *guest_rip, void *guest_rsp); 61 void run_guest(struct vmcb *vmcb, uint64_t vmcb_gpa); 62 63 int open_sev_dev_path_or_exit(void); 64 65 #endif /* SELFTEST_KVM_SVM_UTILS_H */ 66