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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Helpers used for SEV guests
*
*/
#ifndef SELFTEST_KVM_SEV_H
#define SELFTEST_KVM_SEV_H
#include <stdint.h>
#include <stdbool.h>
#include "linux/psp-sev.h"
#include "kvm_util.h"
#include "svm_util.h"
#include "processor.h"
enum sev_guest_state {
SEV_GUEST_STATE_UNINITIALIZED = 0,
SEV_GUEST_STATE_LAUNCH_UPDATE,
SEV_GUEST_STATE_LAUNCH_SECRET,
SEV_GUEST_STATE_RUNNING,
};
#define SEV_POLICY_NO_DBG (1UL << 0)
#define SEV_POLICY_ES (1UL << 2)
#define GHCB_MSR_TERM_REQ 0x100
void sev_vm_launch(struct kvm_vm *vm, uint32_t policy);
void sev_vm_launch_measure(struct kvm_vm *vm, uint8_t *measurement);
void sev_vm_launch_finish(struct kvm_vm *vm);
struct kvm_vm *vm_sev_create_with_one_vcpu(uint32_t policy, void *guest_code,
struct kvm_vcpu **cpu);
kvm_static_assert(SEV_RET_SUCCESS == 0);
/*
* The KVM_MEMORY_ENCRYPT_OP uAPI is utter garbage and takes an "unsigned long"
* instead of a proper struct. The size of the parameter is embedded in the
* ioctl number, i.e. is ABI and thus immutable. Hack around the mess by
* creating an overlay to pass in an "unsigned long" without a cast (casting
* will make the compiler unhappy due to dereferencing an aliased pointer).
*/
#define __vm_sev_ioctl(vm, cmd, arg) \
({ \
int r; \
\
union { \
struct kvm_sev_cmd c; \
unsigned long raw; \
} sev_cmd = { .c = { \
.id = (cmd), \
.data = (uint64_t)(arg), \
.sev_fd = (vm)->arch.sev_fd, \
} }; \
\
r = __vm_ioctl(vm, KVM_MEMORY_ENCRYPT_OP, &sev_cmd.raw); \
r ?: sev_cmd.c.error; \
})
#define vm_sev_ioctl(vm, cmd, arg) \
({ \
int ret = __vm_sev_ioctl(vm, cmd, arg); \
\
__TEST_ASSERT_VM_VCPU_IOCTL(!ret, #cmd, ret, vm); \
})
static inline void sev_vm_init(struct kvm_vm *vm)
{
vm->arch.sev_fd = open_sev_dev_path_or_exit();
vm_sev_ioctl(vm, KVM_SEV_INIT, NULL);
}
static inline void sev_es_vm_init(struct kvm_vm *vm)
{
vm->arch.sev_fd = open_sev_dev_path_or_exit();
vm_sev_ioctl(vm, KVM_SEV_ES_INIT, NULL);
}
static inline void sev_register_encrypted_memory(struct kvm_vm *vm,
struct userspace_mem_region *region)
{
struct kvm_enc_region range = {
.addr = region->region.userspace_addr,
.size = region->region.memory_size,
};
vm_ioctl(vm, KVM_MEMORY_ENCRYPT_REG_REGION, &range);
}
static inline void sev_launch_update_data(struct kvm_vm *vm, vm_paddr_t gpa,
uint64_t size)
{
struct kvm_sev_launch_update_data update_data = {
.uaddr = (unsigned long)addr_gpa2hva(vm, gpa),
.len = size,
};
vm_sev_ioctl(vm, KVM_SEV_LAUNCH_UPDATE_DATA, &update_data);
}
#endif /* SELFTEST_KVM_SEV_H */
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