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