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// SPDX-License-Identifier: GPL-2.0-only
#include "test_util.h"
#include "kvm_util.h"
#include "processor.h"
/*
* Execute a fastop() instruction, with or without forced emulation. BT bit 0
* to set RFLAGS.CF based on whether or not the input is even or odd, so that
* instructions like ADC and SBB are deterministic.
*/
#define fastop(__insn) \
"bt $0, %[bt_val]\n\t" \
__insn "\n\t" \
"pushfq\n\t" \
"pop %[flags]\n\t"
#define flags_constraint(flags_val) [flags]"=r"(flags_val)
#define bt_constraint(__bt_val) [bt_val]"rm"((uint32_t)__bt_val)
#define guest_execute_fastop_1(FEP, insn, __val, __flags) \
({ \
__asm__ __volatile__(fastop(FEP insn " %[val]") \
: [val]"+r"(__val), flags_constraint(__flags) \
: bt_constraint(__val) \
: "cc", "memory"); \
})
#define guest_test_fastop_1(insn, type_t, __val) \
({ \
type_t val = __val, ex_val = __val, input = __val; \
uint64_t flags, ex_flags; \
\
guest_execute_fastop_1("", insn, ex_val, ex_flags); \
guest_execute_fastop_1(KVM_FEP, insn, val, flags); \
\
__GUEST_ASSERT(val == ex_val, \
"Wanted 0x%lx for '%s 0x%lx', got 0x%lx", \
(uint64_t)ex_val, insn, (uint64_t)input, (uint64_t)val); \
__GUEST_ASSERT(flags == ex_flags, \
"Wanted flags 0x%lx for '%s 0x%lx', got 0x%lx", \
ex_flags, insn, (uint64_t)input, flags); \
})
#define guest_execute_fastop_2(FEP, insn, __input, __output, __flags) \
({ \
__asm__ __volatile__(fastop(FEP insn " %[input], %[output]") \
: [output]"+r"(__output), flags_constraint(__flags) \
: [input]"r"(__input), bt_constraint(__output) \
: "cc", "memory"); \
})
#define guest_test_fastop_2(insn, type_t, __val1, __val2) \
({ \
type_t input = __val1, input2 = __val2, output = __val2, ex_output = __val2; \
uint64_t flags, ex_flags; \
\
guest_execute_fastop_2("", insn, input, ex_output, ex_flags); \
guest_execute_fastop_2(KVM_FEP, insn, input, output, flags); \
\
__GUEST_ASSERT(output == ex_output, \
"Wanted 0x%lx for '%s 0x%lx 0x%lx', got 0x%lx", \
(uint64_t)ex_output, insn, (uint64_t)input, \
(uint64_t)input2, (uint64_t)output); \
__GUEST_ASSERT(flags == ex_flags, \
"Wanted flags 0x%lx for '%s 0x%lx, 0x%lx', got 0x%lx", \
ex_flags, insn, (uint64_t)input, (uint64_t)input2, flags); \
})
#define guest_execute_fastop_cl(FEP, insn, __shift, __output, __flags) \
({ \
__asm__ __volatile__(fastop(FEP insn " %%cl, %[output]") \
: [output]"+r"(__output), flags_constraint(__flags) \
: "c"(__shift), bt_constraint(__output) \
: "cc", "memory"); \
})
#define guest_test_fastop_cl(insn, type_t, __val1, __val2) \
({ \
type_t output = __val2, ex_output = __val2, input = __val2; \
uint8_t shift = __val1; \
uint64_t flags, ex_flags; \
\
guest_execute_fastop_cl("", insn, shift, ex_output, ex_flags); \
guest_execute_fastop_cl(KVM_FEP, insn, shift, output, flags); \
\
__GUEST_ASSERT(output == ex_output, \
"Wanted 0x%lx for '%s 0x%x, 0x%lx', got 0x%lx", \
(uint64_t)ex_output, insn, shift, (uint64_t)input, \
(uint64_t)output); \
__GUEST_ASSERT(flags == ex_flags, \
"Wanted flags 0x%lx for '%s 0x%x, 0x%lx', got 0x%lx", \
ex_flags, insn, shift, (uint64_t)input, flags); \
})
#define guest_execute_fastop_div(__KVM_ASM_SAFE, insn, __a, __d, __rm, __flags) \
({ \
uint64_t ign_error_code; \
uint8_t vector; \
\
__asm__ __volatile__(fastop(__KVM_ASM_SAFE(insn " %[denom]")) \
: "+a"(__a), "+d"(__d), flags_constraint(__flags), \
KVM_ASM_SAFE_OUTPUTS(vector, ign_error_code) \
: [denom]"rm"(__rm), bt_constraint(__rm) \
: "cc", "memory", KVM_ASM_SAFE_CLOBBERS); \
vector; \
})
#define guest_test_fastop_div(insn, type_t, __val1, __val2) \
({ \
type_t _a = __val1, _d = __val1, rm = __val2; \
type_t a = _a, d = _d, ex_a = _a, ex_d = _d; \
uint64_t flags, ex_flags; \
uint8_t v, ex_v; \
\
ex_v = guest_execute_fastop_div(KVM_ASM_SAFE, insn, ex_a, ex_d, rm, ex_flags); \
v = guest_execute_fastop_div(KVM_ASM_SAFE_FEP, insn, a, d, rm, flags); \
\
GUEST_ASSERT_EQ(v, ex_v); \
__GUEST_ASSERT(v == ex_v, \
"Wanted vector 0x%x for '%s 0x%lx:0x%lx/0x%lx', got 0x%x", \
ex_v, insn, (uint64_t)_a, (uint64_t)_d, (uint64_t)rm, v); \
__GUEST_ASSERT(a == ex_a && d == ex_d, \
"Wanted 0x%lx:0x%lx for '%s 0x%lx:0x%lx/0x%lx', got 0x%lx:0x%lx",\
(uint64_t)ex_a, (uint64_t)ex_d, insn, (uint64_t)_a, \
(uint64_t)_d, (uint64_t)rm, (uint64_t)a, (uint64_t)d); \
__GUEST_ASSERT(v || ex_v || (flags == ex_flags), \
"Wanted flags 0x%lx for '%s 0x%lx:0x%lx/0x%lx', got 0x%lx", \
ex_flags, insn, (uint64_t)_a, (uint64_t)_d, (uint64_t)rm, flags);\
})
static const uint64_t vals[] = {
0,
1,
2,
4,
7,
0x5555555555555555,
0xaaaaaaaaaaaaaaaa,
0xfefefefefefefefe,
0xffffffffffffffff,
};
#define guest_test_fastops(type_t, suffix) \
do { \
int i, j; \
\
for (i = 0; i < ARRAY_SIZE(vals); i++) { \
guest_test_fastop_1("dec" suffix, type_t, vals[i]); \
guest_test_fastop_1("inc" suffix, type_t, vals[i]); \
guest_test_fastop_1("neg" suffix, type_t, vals[i]); \
guest_test_fastop_1("not" suffix, type_t, vals[i]); \
\
for (j = 0; j < ARRAY_SIZE(vals); j++) { \
guest_test_fastop_2("add" suffix, type_t, vals[i], vals[j]); \
guest_test_fastop_2("adc" suffix, type_t, vals[i], vals[j]); \
guest_test_fastop_2("and" suffix, type_t, vals[i], vals[j]); \
if (sizeof(type_t) != 1) { \
guest_test_fastop_2("bsf" suffix, type_t, vals[i], vals[j]); \
guest_test_fastop_2("bsr" suffix, type_t, vals[i], vals[j]); \
guest_test_fastop_2("bt" suffix, type_t, vals[i], vals[j]); \
guest_test_fastop_2("btc" suffix, type_t, vals[i], vals[j]); \
guest_test_fastop_2("btr" suffix, type_t, vals[i], vals[j]); \
guest_test_fastop_2("bts" suffix, type_t, vals[i], vals[j]); \
guest_test_fastop_2("imul" suffix, type_t, vals[i], vals[j]); \
} \
guest_test_fastop_2("cmp" suffix, type_t, vals[i], vals[j]); \
guest_test_fastop_2("or" suffix, type_t, vals[i], vals[j]); \
guest_test_fastop_2("sbb" suffix, type_t, vals[i], vals[j]); \
guest_test_fastop_2("sub" suffix, type_t, vals[i], vals[j]); \
guest_test_fastop_2("test" suffix, type_t, vals[i], vals[j]); \
guest_test_fastop_2("xor" suffix, type_t, vals[i], vals[j]); \
\
guest_test_fastop_cl("rol" suffix, type_t, vals[i], vals[j]); \
guest_test_fastop_cl("ror" suffix, type_t, vals[i], vals[j]); \
guest_test_fastop_cl("rcl" suffix, type_t, vals[i], vals[j]); \
guest_test_fastop_cl("rcr" suffix, type_t, vals[i], vals[j]); \
guest_test_fastop_cl("sar" suffix, type_t, vals[i], vals[j]); \
guest_test_fastop_cl("shl" suffix, type_t, vals[i], vals[j]); \
guest_test_fastop_cl("shr" suffix, type_t, vals[i], vals[j]); \
\
guest_test_fastop_div("div" suffix, type_t, vals[i], vals[j]); \
} \
} \
} while (0)
static void guest_code(void)
{
guest_test_fastops(uint8_t, "b");
guest_test_fastops(uint16_t, "w");
guest_test_fastops(uint32_t, "l");
guest_test_fastops(uint64_t, "q");
GUEST_DONE();
}
int main(int argc, char *argv[])
{
struct kvm_vcpu *vcpu;
struct kvm_vm *vm;
TEST_REQUIRE(is_forced_emulation_enabled);
vm = vm_create_with_one_vcpu(&vcpu, guest_code);
vcpu_run(vcpu);
TEST_ASSERT_EQ(get_ucall(vcpu, NULL), UCALL_DONE);
kvm_vm_free(vm);
}
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