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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * tools/testing/selftests/kvm/include/x86_64/svm_utils.h4 * Header for nested SVM testing5 *6 * Copyright (C) 2020, Red Hat, Inc.7 */8 9#ifndef SELFTEST_KVM_SVM_UTILS_H10#define SELFTEST_KVM_SVM_UTILS_H11 12#include <asm/svm.h>13 14#include <stdint.h>15#include "svm.h"16#include "processor.h"17 18struct 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 35static inline void vmmcall(void)36{37 /*38 * Stuff RAX and RCX with "safe" values to make sure L0 doesn't handle39 * it as a valid hypercall (e.g. Hyper-V L2 TLB flush) as the intended40 * use of this function is to exit to L1 from L2. Clobber all other41 * 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 59struct svm_test_data *vcpu_alloc_svm(struct kvm_vm *vm, vm_vaddr_t *p_svm_gva);60void generic_svm_setup(struct svm_test_data *svm, void *guest_rip, void *guest_rsp);61void run_guest(struct vmcb *vmcb, uint64_t vmcb_gpa);62 63int open_sev_dev_path_or_exit(void);64 65#endif /* SELFTEST_KVM_SVM_UTILS_H */66