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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Copyright (C) 2018, Google LLC.4 */5#ifndef SELFTEST_KVM_UCALL_COMMON_H6#define SELFTEST_KVM_UCALL_COMMON_H7#include "test_util.h"8#include "ucall.h"9 10/* Common ucalls */11enum {12 UCALL_NONE,13 UCALL_SYNC,14 UCALL_ABORT,15 UCALL_PRINTF,16 UCALL_DONE,17 UCALL_UNHANDLED,18};19 20#define UCALL_MAX_ARGS 721#define UCALL_BUFFER_LEN 102422 23struct ucall {24 uint64_t cmd;25 uint64_t args[UCALL_MAX_ARGS];26 char buffer[UCALL_BUFFER_LEN];27 28 /* Host virtual address of this struct. */29 struct ucall *hva;30};31 32void ucall_arch_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa);33void ucall_arch_do_ucall(vm_vaddr_t uc);34void *ucall_arch_get_ucall(struct kvm_vcpu *vcpu);35 36void ucall(uint64_t cmd, int nargs, ...);37__printf(2, 3) void ucall_fmt(uint64_t cmd, const char *fmt, ...);38__printf(5, 6) void ucall_assert(uint64_t cmd, const char *exp,39 const char *file, unsigned int line,40 const char *fmt, ...);41uint64_t get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc);42void ucall_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa);43int ucall_nr_pages_required(uint64_t page_size);44 45/*46 * Perform userspace call without any associated data. This bare call avoids47 * allocating a ucall struct, which can be useful if the atomic operations in48 * the full ucall() are problematic and/or unwanted. Note, this will come out49 * as UCALL_NONE on the backend.50 */51#define GUEST_UCALL_NONE() ucall_arch_do_ucall((vm_vaddr_t)NULL)52 53#define GUEST_SYNC_ARGS(stage, arg1, arg2, arg3, arg4) \54 ucall(UCALL_SYNC, 6, "hello", stage, arg1, arg2, arg3, arg4)55#define GUEST_SYNC(stage) ucall(UCALL_SYNC, 2, "hello", stage)56#define GUEST_SYNC1(arg0) ucall(UCALL_SYNC, 1, arg0)57#define GUEST_SYNC2(arg0, arg1) ucall(UCALL_SYNC, 2, arg0, arg1)58#define GUEST_SYNC3(arg0, arg1, arg2) \59 ucall(UCALL_SYNC, 3, arg0, arg1, arg2)60#define GUEST_SYNC4(arg0, arg1, arg2, arg3) \61 ucall(UCALL_SYNC, 4, arg0, arg1, arg2, arg3)62#define GUEST_SYNC5(arg0, arg1, arg2, arg3, arg4) \63 ucall(UCALL_SYNC, 5, arg0, arg1, arg2, arg3, arg4)64#define GUEST_SYNC6(arg0, arg1, arg2, arg3, arg4, arg5) \65 ucall(UCALL_SYNC, 6, arg0, arg1, arg2, arg3, arg4, arg5)66 67#define GUEST_PRINTF(_fmt, _args...) ucall_fmt(UCALL_PRINTF, _fmt, ##_args)68#define GUEST_DONE() ucall(UCALL_DONE, 0)69 70#define REPORT_GUEST_PRINTF(ucall) pr_info("%s", (ucall).buffer)71 72enum guest_assert_builtin_args {73 GUEST_ERROR_STRING,74 GUEST_FILE,75 GUEST_LINE,76 GUEST_ASSERT_BUILTIN_NARGS77};78 79#define ____GUEST_ASSERT(_condition, _exp, _fmt, _args...) \80do { \81 if (!(_condition)) \82 ucall_assert(UCALL_ABORT, _exp, __FILE__, __LINE__, _fmt, ##_args); \83} while (0)84 85#define __GUEST_ASSERT(_condition, _fmt, _args...) \86 ____GUEST_ASSERT(_condition, #_condition, _fmt, ##_args)87 88#define GUEST_ASSERT(_condition) \89 __GUEST_ASSERT(_condition, #_condition)90 91#define GUEST_FAIL(_fmt, _args...) \92 ucall_assert(UCALL_ABORT, "Unconditional guest failure", \93 __FILE__, __LINE__, _fmt, ##_args)94 95#define GUEST_ASSERT_EQ(a, b) \96do { \97 typeof(a) __a = (a); \98 typeof(b) __b = (b); \99 ____GUEST_ASSERT(__a == __b, #a " == " #b, "%#lx != %#lx (%s != %s)", \100 (unsigned long)(__a), (unsigned long)(__b), #a, #b); \101} while (0)102 103#define GUEST_ASSERT_NE(a, b) \104do { \105 typeof(a) __a = (a); \106 typeof(b) __b = (b); \107 ____GUEST_ASSERT(__a != __b, #a " != " #b, "%#lx == %#lx (%s == %s)", \108 (unsigned long)(__a), (unsigned long)(__b), #a, #b); \109} while (0)110 111#define REPORT_GUEST_ASSERT(ucall) \112 test_assert(false, (const char *)(ucall).args[GUEST_ERROR_STRING], \113 (const char *)(ucall).args[GUEST_FILE], \114 (ucall).args[GUEST_LINE], "%s", (ucall).buffer)115 116#endif /* SELFTEST_KVM_UCALL_COMMON_H */117