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-rw-r--r--tools/testing/selftests/kvm/include/x86_64/svm_util.h65
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 */