/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef SELFTEST_KVM_UTIL_ARCH_H
#define SELFTEST_KVM_UTIL_ARCH_H

#include <stdbool.h>
#include <stdint.h>

#include "kvm_util_types.h"
#include "test_util.h"

extern bool is_forced_emulation_enabled;

struct pte_masks {
        uint64_t present;
        uint64_t writable;
        uint64_t user;
        uint64_t readable;
        uint64_t executable;
        uint64_t accessed;
        uint64_t dirty;
        uint64_t huge;
        uint64_t nx;
        uint64_t c;
        uint64_t s;

        uint64_t always_set;
};

struct kvm_mmu_arch {
        struct pte_masks pte_masks;
};

struct kvm_mmu;

struct kvm_vm_arch {
        vm_vaddr_t gdt;
        vm_vaddr_t tss;
        vm_vaddr_t idt;

        uint64_t c_bit;
        uint64_t s_bit;
        int sev_fd;
        bool is_pt_protected;
};

static inline bool __vm_arch_has_protected_memory(struct kvm_vm_arch *arch)
{
        return arch->c_bit || arch->s_bit;
}

#define vm_arch_has_protected_memory(vm) \
        __vm_arch_has_protected_memory(&(vm)->arch)

#define vcpu_arch_put_guest(mem, __val)                                                 \
do {                                                                                    \
        const typeof(mem) val = (__val);                                                \
                                                                                        \
        if (!is_forced_emulation_enabled || guest_random_bool(&guest_rng)) {            \
                (mem) = val;                                                            \
        } else if (guest_random_bool(&guest_rng)) {                                     \
                __asm__ __volatile__(KVM_FEP "mov %1, %0"                               \
                                     : "+m" (mem)                                       \
                                     : "r" (val) : "memory");                           \
        } else {                                                                        \
                uint64_t __old = READ_ONCE(mem);                                        \
                                                                                        \
                __asm__ __volatile__(KVM_FEP LOCK_PREFIX "cmpxchg %[new], %[ptr]"       \
                                     : [ptr] "+m" (mem), [old] "+a" (__old)             \
                                     : [new]"r" (val) : "memory", "cc");                \
        }                                                                               \
} while (0)

#endif  // SELFTEST_KVM_UTIL_ARCH_H