// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Simple sanity tests for instruction emulation infrastructure.
*
* Copyright IBM Corp. 2016
*/
#define pr_fmt(fmt) "emulate_step_test: " fmt
#include <linux/ptrace.h>
#include <asm/cpu_has_feature.h>
#include <asm/sstep.h>
#include <asm/ppc-opcode.h>
#include <asm/code-patching.h>
#include <asm/inst.h>
#define MAX_SUBTESTS 16
#define IGNORE_GPR(n) (0x1UL << (n))
#define IGNORE_XER (0x1UL << 32)
#define IGNORE_CCR (0x1UL << 33)
#define NEGATIVE_TEST (0x1UL << 63)
#define TEST_PLD(r, base, i, pr) \
ppc_inst_prefix(PPC_PREFIX_8LS | __PPC_PRFX_R(pr) | IMM_H(i), \
PPC_INST_PLD | ___PPC_RT(r) | ___PPC_RA(base) | IMM_L(i))
#define TEST_PLWZ(r, base, i, pr) \
ppc_inst_prefix(PPC_PREFIX_MLS | __PPC_PRFX_R(pr) | IMM_H(i), \
PPC_RAW_LWZ(r, base, i))
#define TEST_PSTD(r, base, i, pr) \
ppc_inst_prefix(PPC_PREFIX_8LS | __PPC_PRFX_R(pr) | IMM_H(i), \
PPC_INST_PSTD | ___PPC_RT(r) | ___PPC_RA(base) | IMM_L(i))
#define TEST_PLFS(r, base, i, pr) \
ppc_inst_prefix(PPC_PREFIX_MLS | __PPC_PRFX_R(pr) | IMM_H(i), \
PPC_INST_LFS | ___PPC_RT(r) | ___PPC_RA(base) | IMM_L(i))
#define TEST_PSTFS(r, base, i, pr) \
ppc_inst_prefix(PPC_PREFIX_MLS | __PPC_PRFX_R(pr) | IMM_H(i), \
PPC_INST_STFS | ___PPC_RT(r) | ___PPC_RA(base) | IMM_L(i))
#define TEST_PLFD(r, base, i, pr) \
ppc_inst_prefix(PPC_PREFIX_MLS | __PPC_PRFX_R(pr) | IMM_H(i), \
PPC_INST_LFD | ___PPC_RT(r) | ___PPC_RA(base) | IMM_L(i))
#define TEST_PSTFD(r, base, i, pr) \
ppc_inst_prefix(PPC_PREFIX_MLS | __PPC_PRFX_R(pr) | IMM_H(i), \
PPC_INST_STFD | ___PPC_RT(r) | ___PPC_RA(base) | IMM_L(i))
#define TEST_PADDI(t, a, i, pr) \
ppc_inst_prefix(PPC_PREFIX_MLS | __PPC_PRFX_R(pr) | IMM_H(i), \
PPC_RAW_ADDI(t, a, i))
static void __init init_pt_regs(struct pt_regs *regs)
{
static unsigned long msr;
static bool msr_cached;
memset(regs, 0, sizeof(struct pt_regs));
if (likely(msr_cached)) {
regs->msr = msr;
return;
}
asm volatile("mfmsr %0" : "=r"(regs->msr));
regs->msr |= MSR_FP;
regs->msr |= MSR_VEC;
regs->msr |= MSR_VSX;
msr = regs->msr;
msr_cached = true;
}
static void __init show_result(char *mnemonic, char *result)
{
pr_info("%-14s : %s\n", mnemonic, result);
}
static void __init show_result_with_descr(char *mnemonic, char *descr,
char *result)
{
pr_info("%-14s : %-50s %s\n", mnemonic, descr, result);
}
static void __init test_ld(void)
{
struct pt_regs regs;
unsigned long a = 0x23;
int stepped = -1;
init_pt_regs(®s);
regs.gpr[3] = (unsigned long) &a;
/* ld r5, 0(r3) */
stepped = emulate_step(®s, ppc_inst(PPC_RAW_LD(5, 3, 0)));
if (stepped == 1 && regs.gpr[5] == a)
show_result("ld", "PASS");
else
show_result("ld", "FAIL");
}
static void __init test_pld(void)
{
struct pt_regs regs;
unsigned long a = 0x23;
int stepped = -1;
if (!cpu_has_feature(CPU_FTR_ARCH_31)) {
show_result("pld", "SKIP (!CPU_FTR_ARCH_31)");
return;
}
init_pt_regs(®s);
regs.gpr[3] = (unsigned long)&a;
/* pld r5, 0(r3), 0 */
stepped = emulate_step(®s, TEST_PLD(5, 3, 0, 0));
if (stepped == 1 && regs.gpr[5] == a)
show_result("pld", "PASS");
else
show_result("pld", "FAIL");
}
static void __init test_lwz(void)
{
struct pt_regs regs;
unsigned int a = 0x4545;
int stepped = -1;
init_pt_regs(®s);
regs.gpr[3] = (unsigned long) &a;
/* lwz r5, 0(r3) */
stepped = emulate_step(®s, ppc_inst(PPC_RAW_LWZ(5, 3, 0)));
if (stepped == 1 && regs.gpr[5] == a)
show_result("lwz", "PASS");
else
show_result("lwz", "FAIL");
}
static void __init test_plwz(void)
{
struct pt_regs regs;
unsigned int a = 0x4545;
int stepped = -1;
if (!cpu_has_feature(CPU_FTR_ARCH_31)) {
show_result("plwz", "SKIP (!CPU_FTR_ARCH_31)");
return;
}
init_pt_regs(®s);
regs.gpr[3] = (unsigned long)&a;
/* plwz r5, 0(r3), 0 */
stepped = emulate_step(®s, TEST_PLWZ(5, 3, 0, 0));
if (stepped == 1 && regs.gpr[5] == a)
show_result("plwz", "PASS");
else
show_result("plwz", "FAIL");
}
static void __init test_lwzx(void)
{
struct pt_regs regs;
unsigned int a[3] = {0x0, 0x0, 0x1234};
int stepped = -1;
init_pt_regs(®s);
regs.gpr[3] = (unsigned long) a;
regs.gpr[4] = 8;
regs.gpr[5] = 0x8765;
/* lwzx r5, r3, r4 */
stepped = emulate_step(®s, ppc_inst(PPC_RAW_LWZX(5, 3, 4)));
if (stepped == 1 && regs.gpr[5] == a[2])
show_result("lwzx", "PASS");
else
show_result("lwzx", "FAIL");
}
static void __init test_std(void)
{
struct pt_regs regs;
unsigned long a = 0x1234;
int stepped = -1;
init_pt_regs(®s);
regs.gpr[3] = (unsigned long) &a;
regs.gpr[5] = 0x5678;
/* std r5, 0(r3) */
stepped = emulate_step(®s, ppc_inst(PPC_RAW_STD(5, 3, 0)));
if (stepped == 1 && regs.gpr[5] == a)
show_result("std", "PASS");
else
show_result("std", "FAIL");
}
static void __init test_pstd(void)
{
struct pt_regs regs;
unsigned long a = 0x1234;
int stepped = -1;
if (!cpu_has_feature(CPU_FTR_ARCH_31)) {
show_result("pstd", "SKIP (!CPU_FTR_ARCH_31)");
return;
}
init_pt_regs(®s);
regs.gpr[3] = (unsigned long)&a;
regs.gpr[5] = 0x5678;
/* pstd r5, 0(r3), 0 */
stepped = emulate_step(®s, TEST_PSTD(5, 3, 0, 0));
if (stepped == 1 || regs.gpr[5] == a)
show_result("pstd", "PASS");
else
show_result("pstd", "FAIL");
}
static void __init test_ldarx_stdcx(void)
{
struct pt_regs regs;
unsigned long a = 0x1234;
int stepped = -1;
unsigned long cr0_eq = 0x1 << 29; /* eq bit of CR0 */
init_pt_regs(®s);
asm volatile("mfcr %0" : "=r"(regs.ccr));
/*** ldarx ***/
regs.gpr[3] = (unsigned long) &a;
regs.gpr[4] = 0;
regs.gpr[5] = 0x5678;
/* ldarx r5, r3, r4, 0 */
stepped = emulate_step(®s, ppc_inst(PPC_RAW_LDARX(5, 3, 4, 0)));
/*
* Don't touch 'a' here. Touching 'a' can do Load/store
* of 'a' which result in failure of subsequent stdcx.
* Instead, use hardcoded value for comparison.
*/
if (stepped <= 0 || regs.gpr[5] != 0x1234) {
show_result("ldarx / stdcx.", "FAIL (ldarx)");
return;
}
/*** stdcx. ***/
regs.gpr[5] = 0x9ABC;
/* stdcx. r5, r3, r4 */
stepped = emulate_step(®s, ppc_inst(PPC_RAW_STDCX(5, 3, 4)));
/*
* Two possible scenarios that indicates successful emulation
* of stdcx. :
* 1. Reservation is active and store is performed. In this
* case cr0.eq bit will be set to 1.
* 2. Reservation is not active and store is not performed.
* In this case cr0.eq bit will be set to 0.
*/
if (stepped == 1 && ((regs.gpr[5] == a && (regs.ccr & cr0_eq))
|| (regs.gpr[5] != a && !(regs.ccr & cr0_eq))))
show_result("ldarx / stdcx.", "PASS");
else
show_result("ldarx / stdcx.", "FAIL (stdcx.)");
}
#ifdef CONFIG_PPC_FPU
static void __init test_lfsx_stfsx(void)
{
struct pt_regs regs;
union {
float a;
int b;
} c;
int cached_b;
int stepped = -1;
init_pt_regs(®s);
/*** lfsx ***/
c.a = 123.45;
cached_b = c.b;
regs.gpr[3] = (unsigned long) &c.a;
regs.gpr[4] = 0;
/* lfsx frt10, r3, r4 */
stepped = emulate_step(®s, ppc_inst(PPC_RAW_LFSX(10, 3, 4)));
if (stepped == 1)
show_result("lfsx", "PASS");
else
show_result("lfsx", "FAIL");
/*** stfsx ***/
c.a = 678.91;
/* stfsx frs10, r3, r4 */
stepped = emulate_step(®s, ppc_inst(PPC_RAW_STFSX(10, 3, 4)));
if (stepped == 1 && c.b == cached_b)
show_result("stfsx", "PASS");
else
show_result("stfsx", "FAIL");
}
static void __init test_plfs_pstfs(void)
{
struct pt_regs regs;
union {
float a;
int b;
} c;
int cached_b;
int stepped = -1;
if (!cpu_has_feature(CPU_FTR_ARCH_31)) {
show_result("pld", "SKIP (!CPU_FTR_ARCH_31)");
return;
}
init_pt_regs(®s);
/*** plfs ***/
c.a = 123.45;
cached_b = c.b;
regs.gpr[3] = (unsigned long)&c.a;
/* plfs frt10, 0(r3), 0 */
stepped = emulate_step(®s, TEST_PLFS(10, 3, 0, 0));
if (stepped == 1)
show_result("plfs", "PASS");
else
show_result("plfs", "FAIL");
/*** pstfs ***/
c.a = 678.91;
/* pstfs frs10, 0(r3), 0 */
stepped = emulate_step(®s, TEST_PSTFS(10, 3, 0, 0));
if (stepped == 1 && c.b == cached_b)
show_result("pstfs", "PASS");
else
show_result("pstfs", "FAIL");
}
static void __init test_lfdx_stfdx(void)
{
struct pt_regs regs;
union {
double a;
long b;
} c;
long cached_b;
int stepped = -1;
init_pt_regs(®s);
/*** lfdx ***/
c.a = 123456.78;
cached_b = c.b;
regs.gpr[3] = (unsigned long) &c.a;
regs.gpr[4] = 0;
/* lfdx frt10, r3, r4 */
stepped = emulate_step(®s, ppc_inst(PPC_RAW_LFDX(10, 3, 4)));
if (stepped == 1)
show_result("lfdx", "PASS");
else
show_result("lfdx", "FAIL");
/*** stfdx ***/
c.a = 987654.32;
/* stfdx frs10, r3, r4 */
stepped = emulate_step(®s, ppc_inst(PPC_RAW_STFDX(10, 3, 4)));
if (stepped == 1 && c.b == cached_b)
show_result("stfdx", "PASS");
else
show_result("stfdx", "FAIL");
}
static void __init test_plfd_pstfd(void)
{
struct pt_regs regs;
union {
double a;
long b;
} c;
long cached_b;
int stepped = -1;
if (!cpu_has_feature(CPU_FTR_ARCH_31)) {
show_result("pld", "SKIP (!CPU_FTR_ARCH_31)");
return;
}
init_pt_regs(®s);
/*** plfd ***/
c.a = 123456.78;
cached_b = c.b;
regs.gpr[3] = (unsigned long)&c.a;
/* plfd frt10, 0(r3), 0 */
stepped = emulate_step(®s, TEST_PLFD(10, 3, 0, 0));
if (stepped == 1)
show_result("plfd", "PASS");
else
show_result("plfd", "FAIL");
/*** pstfd ***/
c.a = 987654.32;
/* pstfd frs10, 0(r3), 0 */
stepped = emulate_step(®s, TEST_PSTFD(10, 3, 0, 0));
if (stepped == 1 && c.b == cached_b)
show_result("pstfd", "PASS");
else
show_result("pstfd", "FAIL");
}
#else
static void __init test_lfsx_stfsx(void)
{
show_result("lfsx", "SKIP (CONFIG_PPC_FPU is not set)");
show_result("stfsx", "SKIP (CONFIG_PPC_FPU is not set)");
}
static void __init test_plfs_pstfs(void)
{
show_result("plfs", "SKIP (CONFIG_PPC_FPU is not set)");
show_result("pstfs", "SKIP (CONFIG_PPC_FPU is not set)");
}
static void __init test_lfdx_stfdx(void)
{
show_result("lfdx", "SKIP (CONFIG_PPC_FPU is not set)");
show_result("stfdx", "SKIP (CONFIG_PPC_FPU is not set)");
}
static void __init test_plfd_pstfd(void)
{
show_result("plfd", "SKIP (CONFIG_PPC_FPU is not set)");
show_result("pstfd", "SKIP (CONFIG_PPC_FPU is not set)");
}
#endif /* CONFIG_PPC_FPU */
#ifdef CONFIG_ALTIVEC
static void __init test_lvx_stvx(void)
{
struct pt_regs regs;
union {
vector128 a;
u32 b[4];
} c;
u32 cached_b[4];
int stepped = -1;
init_pt_regs(®s);
/*** lvx ***/
cached_b[0] = c.b[0] = 923745;
cached_b[1] = c.b[1] = 2139478;
cached_b[2] = c.b[2] = 9012;
cached_b[3] = c.b[3] = 982134;
regs.gpr[3] = (unsigned long) &c.a;
regs.gpr[4] = 0;
/* lvx vrt10, r3, r4 */
stepped = emulate_step(®s, ppc_inst(PPC_RAW_LVX(10, 3, 4)));
if (stepped == 1)
show_result("lvx", "PASS");
else
show_result("lvx", "FAIL");
/*** stvx ***/
c.b[0] = 4987513;
c.b[1] = 84313948;
c.b[2] = 71;
c.b[3] = 498532;
/* stvx vrs10, r3, r4 */
stepped = emulate_step(®s, ppc_inst(PPC_RAW_STVX(10, 3, 4)));
if (stepped == 1 && cached_b[0] == c.b[0] && cached_b[1] == c.b[1] &&
cached_b[2] == c.b[2] && cached_b[3] == c.b[3])
show_result("stvx", "PASS");
else
show_result("stvx", "FAIL");
}
#else
static void __init test_lvx_stvx(void)
{
show_result("lvx", "SKIP (CONFIG_ALTIVEC is not set)");
show_result("stvx", "SKIP (CONFIG_ALTIVEC is not set)");
}
#endif /* CONFIG_ALTIVEC */
#ifdef CONFIG_VSX
static void __init test_lxvd2x_stxvd2x(void)
{
struct pt_regs regs;
union {
vector128 a;
u32 b[4];
} c;
u32 cached_b[4];
int stepped = -1;
init_pt_regs(®s);
/*** lxvd2x ***/
cached_b[0] = c.b[0] = 18233;
cached_b[1] = c.b[1] = 34863571;
cached_b[2] = c.b[2] = 834;
cached_b[3] = c.b[3] = 6138911;
regs.gpr[3] = (unsigned long) &c.a;
regs.gpr[4] = 0;
/* lxvd2x vsr39, r3, r4 */
stepped = emulate_step(®s, ppc_inst(PPC_RAW_LXVD2X(39, R3, R4)));
if (stepped == 1 && cpu_has_feature(CPU_FTR_VSX)) {
show_result("lxvd2x", "PASS");
} else {
if (!cpu_has_feature(CPU_FTR_VSX))
show_result("lxvd2x", "PASS (!CPU_FTR_VSX)");
else
show_result("lxvd2x", "FAIL");
}
/*** stxvd2x ***/
c.b[0] = 21379463;
c.b[1] = 87;
c.b[2] = 374234;
c.b[3] = 4;
/* stxvd2x vsr39, r3, r4 */
stepped = emulate_step(®s, ppc_inst(PPC_RAW_STXVD2X(39, R3, R4)));
if (stepped == 1 && cached_b[0] == c.b[0] && cached_b[1] == c.b[1] &&
cached_b[2] == c.b[2] && cached_b[3] == c.b[3] &&
cpu_has_feature(CPU_FTR_VSX)) {
show_result("stxvd2x", "PASS");
} else {
if (!cpu_has_feature(CPU_FTR_VSX))
show_result("stxvd2x", "PASS (!CPU_FTR_VSX)");
else
show_result("stxvd2x", "FAIL");
}
}
#else
static void __init test_lxvd2x_stxvd2x(void)
{
show_result("lxvd2x", "SKIP (CONFIG_VSX is not set)");
show_result("stxvd2x", "SKIP (CONFIG_VSX is not set)");
}
#endif /* CONFIG_VSX */
#ifdef CONFIG_VSX
static void __init test_lxvp_stxvp(void)
{
struct pt_regs regs;
union {
vector128 a;
u32 b[4];
} c[2];
u32 cached_b[8];
int stepped = -1;
if (!cpu_has_feature(CPU_FTR_ARCH_31)) {
show_result("lxvp", "SKIP (!CPU_FTR_ARCH_31)");
show_result("stxvp", "SKIP (!CPU_FTR_ARCH_31)");
return;
}
init_pt_regs(®s);
/*** lxvp ***/
cached_b[0] = c[0].b[0] = 18233;
cached_b[1] = c[0].b[1] = 34863571;
cached_b[2] = c[0].b[2] = 834;
cached_b[3] = c[0].b[3] = 6138911;
cached_b[4] = c[1].b[0] = 1234;
cached_b[5] = c[1].b[1] = 5678;
cached_b[6] = c[1].b[2] = 91011;
cached_b[7] = c[1].b[3] = 121314;
regs.gpr[4] = (unsigned long)&c[0].a;
/*
* lxvp XTp,DQ(RA)
* XTp = 32xTX + 2xTp
* let TX=1 Tp=1 RA=4 DQ=0
*/
stepped = emulate_step(®s, ppc_inst(PPC_RAW_LXVP(34, 4, 0)));
if (stepped == 1 && cpu_has_feature(CPU_FTR_VSX)) {
show_result("lxvp", "PASS");
} else {
if (!cpu_has_feature(CPU_FTR_VSX))
show_result("lxvp", "PASS (!CPU_FTR_VSX)");
else
show_result("lxvp", "FAIL");
}
/*** stxvp ***/
c[0].b[0] = 21379463;
c[0].b[1] = 87;
c[0].b[2] = 374234;
c[0].b[3] = 4;
c[1].b[0] = 90;
c[1].b[1] = 122;
c[1].b[2] = 555;
c[1].b[3] = 32144;
/*
* stxvp XSp,DQ(RA)
* XSp = 32xSX + 2xSp
* let SX=1 Sp=1 RA=4 DQ=0
*/
stepped = emulate_step(®s, ppc_inst(PPC_RAW_STXVP(34, 4, 0)));
if (stepped == 1 && cached_b[0] == c[0].b[0] && cached_b[1] == c[0].b[1] &&
cached_b[2] == c[0].b[2] && cached_b[3] == c[0].b[3] &&
cached_b[4] == c[1].b[0] && cached_b[5] == c[1].b[1] &&
cached_b[6] == c[1].b[2] && cached_b[7] == c[1].b[3] &&
cpu_has_feature(CPU_FTR_VSX)) {
show_result("stxvp", "PASS");
} else {
if (!cpu_has_feature(CPU_FTR_VSX))
show_result("stxvp", "PASS (!CPU_FTR_VSX)");
else
show_result("stxvp", "FAIL");
}
}
#else
static void __init test_lxvp_stxvp(void)
{
show_result("lxvp", "SKIP (CONFIG_VSX is not set)");
show_result("stxvp", "SKIP (CONFIG_VSX is not set)");
}
#endif /* CONFIG_VSX */
#ifdef CONFIG_VSX
static void __init test_lxvpx_stxvpx(void)
{
struct pt_regs regs;
union {
vector128 a;
u32 b[4];
} c[2];
u32 cached_b[8];
int stepped = -1;
if (!cpu_has_feature(CPU_FTR_ARCH_31)) {
show_result("lxvpx", "SKIP (!CPU_FTR_ARCH_31)");
show_result("stxvpx", "SKIP (!CPU_FTR_ARCH_31)");
return;
}
init_pt_regs(®s);
/*** lxvpx ***/
cached_b[0] = c[0].b[0] = 18233;
cached_b[1] = c[0].b[1] = 34863571;
cached_b[2] = c[0].b[2] = 834;
cached_b[3] = c[0].b[3] = 6138911;
cached_b[4] = c[1].b[0] = 1234;
cached_b[5] = c[1].b[1] = 5678;
cached_b[6] = c[1].b[2] = 91011;
cached_b[7] = c[1].b[3] = 121314;
regs.gpr[3] = (unsigned long)&c[0].a;
regs.gpr[4] = 0;
/*
* lxvpx XTp,RA,RB
* XTp = 32xTX + 2xTp
* let TX=1 Tp=1 RA=3 RB=4
*/
stepped = emulate_step(®s, ppc_inst(PPC_RAW_LXVPX(34, 3, 4)));
if (stepped == 1 && cpu_has_feature(CPU_FTR_VSX)) {
show_result("lxvpx", "PASS");
} else {
if (!cpu_has_feature(CPU_FTR_VSX))
show_result("lxvpx", "PASS (!CPU_FTR_VSX)");
else
show_result("lxvpx", "FAIL");
}
/*** stxvpx ***/
c[0].b[0] = 21379463;
c[0].b[1] = 87;
c[0].b[2] = 374234;
c[0].b[3] = 4;
c[1].b[0] = 90;
c[1].b[1] = 122;
c[1].b[2] = 555;
c[1].b[3] = 32144;
/*
* stxvpx XSp,RA,RB
* XSp = 32xSX + 2xSp
* let SX=1 Sp=1 RA=3 RB=4
*/
stepped = emulate_step(®s, ppc_inst(PPC_RAW_STXVPX(34, 3, 4)));
if (stepped == 1 && cached_b[0] == c[0].b[0] && cached_b[1] == c[0].b[1] &&
cached_b[2] == c[0].b[2] && cached_b[3] == c[0].b[3] &&
cached_b[4] == c[1].b[0] && cached_b[5] == c[1].b[1] &&
cached_b[6] == c[1].b[2] && cached_b[7] == c[1].b[3] &&
cpu_has_feature(CPU_FTR_VSX)) {
show_result("stxvpx", "PASS");
} else {
if (!cpu_has_feature(CPU_FTR_VSX))
show_result("stxvpx", "PASS (!CPU_FTR_VSX)");
else
show_result("stxvpx", "FAIL");
}
}
#else
static void __init test_lxvpx_stxvpx(void)
{
show_result("lxvpx", "SKIP (CONFIG_VSX is not set)");
show_result("stxvpx", "SKIP (CONFIG_VSX is not set)");
}
#endif /* CONFIG_VSX */
#ifdef CONFIG_VSX
static void __init test_plxvp_pstxvp(void)
{
ppc_inst_t instr;
struct pt_regs regs;
union {
vector128 a;
u32 b[4];
} c[2];
u32 cached_b[8];
int stepped = -1;
if (!cpu_has_feature(CPU_FTR_ARCH_31)) {
show_result("plxvp", "SKIP (!CPU_FTR_ARCH_31)");
show_result("pstxvp", "SKIP (!CPU_FTR_ARCH_31)");
return;
}
/*** plxvp ***/
cached_b[0] = c[0].b[0] = 18233;
cached_b[1] = c[0].b[1] = 34863571;
cached_b[2] = c[0].b[2] = 834;
cached_b[3] = c[0].b[3] = 6138911;
cached_b[4] = c[1].b[0] = 1234;
cached_b[5] = c[1].b[1] = 5678;
cached_b[6] = c[1].b[2] = 91011;
cached_b[7] = c[1].b[3] = 121314;
init_pt_regs(®s);
regs.gpr[3] = (unsigned long)&c[0].a;
/*
* plxvp XTp,D(RA),R
* XTp = 32xTX + 2xTp
* let RA=3 R=0 D=d0||d1=0 R=0 Tp=1 TX=1
*/
instr = ppc_inst_prefix(PPC_RAW_PLXVP_P(34, 0, 3, 0), PPC_RAW_PLXVP_S(34, 0, 3, 0));
stepped = emulate_step(®s, instr);
if (stepped == 1 && cpu_has_feature(CPU_FTR_VSX)) {
show_result("plxvp", "PASS");
} else {
if (!cpu_has_feature(CPU_FTR_VSX))
show_result("plxvp", "PASS (!CPU_FTR_VSX)");
else
show_result("plxvp", "FAIL");
}
/*** pstxvp ***/
c[0].b[0] = 21379463;
c[0].b[1] = 87;
c[0].b[2] = 374234;
c[0].b[3] = 4;
c[1].b[0] = 90;
c[1].b[1] = 122;
c[1].b[2] = 555;
c[1].b[3] = 32144;
/*
* pstxvp XSp,D(RA),R
* XSp = 32xSX + 2xSp
* let RA=3 D=d0||d1=0 R=0 Sp=1 SX=1
*/
instr = ppc_inst_prefix(PPC_RAW_PSTXVP_P(34, 0, 3, 0), PPC_RAW_PSTXVP_S(34, 0, 3, 0));
stepped = emulate_step(®s, instr);
if (stepped == 1 && cached_b[0] == c[0].b[0] && cached_b[1] == c[0].b[1] &&
cached_b[2] == c[0].b[2] && cached_b[3] == c[0].b[3] &&
cached_b[4] == c[1].b[0] && cached_b[5] == c[1].b[1] &&
cached_b[6] == c[1].b[2] && cached_b[7] == c[1].b[3] &&
cpu_has_feature(CPU_FTR_VSX)) {
show_result("pstxvp", "PASS");
} else {
if (!cpu_has_feature(CPU_FTR_VSX))
show_result("pstxvp", "PASS (!CPU_FTR_VSX)");
else
show_result("pstxvp", "FAIL");
}
}
#else
static void __init test_plxvp_pstxvp(void)
{
show_result("plxvp", "SKIP (CONFIG_VSX is not set)");
show_result("pstxvp", "SKIP (CONFIG_VSX is not set)");
}
#endif /* CONFIG_VSX */
static void __init run_tests_load_store(void)
{
test_ld();
test_pld();
test_lwz();
test_plwz();
test_lwzx();
test_std();
test_pstd();
test_ldarx_stdcx();
test_lfsx_stfsx();
test_plfs_pstfs();
test_lfdx_stfdx();
test_plfd_pstfd();
test_lvx_stvx();
test_lxvd2x_stxvd2x();
test_lxvp_stxvp();
test_lxvpx_stxvpx();
test_plxvp_pstxvp();
}
struct compute_test {
char *mnemonic;
unsigned long cpu_feature;
struct {
char *descr;
unsigned long flags;
ppc_inst_t instr;
struct pt_regs regs;
} subtests[MAX_SUBTESTS + 1];
};
/* Extreme values for si0||si1 (the MLS:D-form 34 bit immediate field) */
#define SI_MIN BIT(33)
#define SI_MAX (BIT(33) - 1)
#define SI_UMAX (BIT(34) - 1)
static struct compute_test compute_tests[] = {
{
.mnemonic = "nop",
.subtests = {
{
.descr = "R0 = LONG_MAX",
.instr = ppc_inst(PPC_RAW_NOP()),
.regs = {
.gpr[0] = LONG_MAX,
}
}
}
},
{
.mnemonic = "setb",
.cpu_feature = CPU_FTR_ARCH_300,
.subtests = {
{
.descr = "BFA = 1, CR = GT",
.instr = ppc_inst(PPC_RAW_SETB(20, 1)),
.regs = {
.ccr = 0x4000000,
}
},
{
.descr = "BFA = 4, CR = LT",
.instr = ppc_inst(PPC_RAW_SETB(20, 4)),
.regs = {
.ccr = 0x8000,
}
},
{
.descr = "BFA = 5, CR = EQ",
.instr = ppc_inst(PPC_RAW_SETB(20, 5)),
.regs = {
.ccr = 0x200,
}
}
}
},
{
.mnemonic = "add",
.subtests = {
{
.descr = "RA = LONG_MIN, RB = LONG_MIN",
.instr = ppc_inst(PPC_RAW_ADD(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MIN,
.gpr[22] = LONG_MIN,
}
},
{
.descr = "RA = LONG_MIN, RB = LONG_MAX",
.instr = ppc_inst(PPC_RAW_ADD(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MIN,
.gpr[22] = LONG_MAX,
}
},
{
.descr = "RA = LONG_MAX, RB = LONG_MAX",
.instr = ppc_inst(PPC_RAW_ADD(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MAX,
.gpr[22] = LONG_MAX,
}
},
{
.descr = "RA = ULONG_MAX, RB = ULONG_MAX",
.instr = ppc_inst(PPC_RAW_ADD(20, 21, 22)),
.regs = {
.gpr[21] = ULONG_MAX,
.gpr[22] = ULONG_MAX,
}
},
{
.descr = "RA = ULONG_MAX, RB = 0x1",
.instr = ppc_inst(PPC_RAW_ADD(20, 21, 22)),
.regs = {
.gpr[21] = ULONG_MAX,
.gpr[22] = 0x1,
}
},
{
.descr = "RA = INT_MIN, RB = INT_MIN",
.instr = ppc_inst(PPC_RAW_ADD(20, 21, 22)),
.regs = {
.gpr[21] = INT_MIN,
.gpr[22] = INT_MIN,
}
},
{
.descr = "RA = INT_MIN, RB = INT_MAX",
.instr = ppc_inst(PPC_RAW_ADD(20, 21, 22)),
.regs = {
.gpr[21] = INT_MIN,
.gpr[22] = INT_MAX,
}
},
{
.descr = "RA = INT_MAX, RB = INT_MAX",
.instr = ppc_inst(PPC_RAW_ADD(20, 21, 22)),
.regs = {
.gpr[21] = INT_MAX,
.gpr[22] = INT_MAX,
}
},
{
.descr = "RA = UINT_MAX, RB = UINT_MAX",
.instr = ppc_inst(PPC_RAW_ADD(20, 21, 22)),
.regs = {
.gpr[21] = UINT_MAX,
.gpr[22] = UINT_MAX,
}
},
{
.descr = "RA = UINT_MAX, RB = 0x1",
.instr = ppc_inst(PPC_RAW_ADD(20, 21, 22)),
.regs = {
.gpr[21] = UINT_MAX,
.gpr[22] = 0x1,
}
}
}
},
{
.mnemonic = "add.",
.subtests = {
{
.descr = "RA = LONG_MIN, RB = LONG_MIN",
.flags = IGNORE_CCR,
.instr = ppc_inst(PPC_RAW_ADD_DOT(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MIN,
.gpr[22] = LONG_MIN,
}
},
{
.descr = "RA = LONG_MIN, RB = LONG_MAX",
.instr = ppc_inst(PPC_RAW_ADD_DOT(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MIN,
.gpr[22] = LONG_MAX,
}
},
{
.descr = "RA = LONG_MAX, RB = LONG_MAX",
.flags = IGNORE_CCR,
.instr = ppc_inst(PPC_RAW_ADD_DOT(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MAX,
.gpr[22] = LONG_MAX,
}
},
{
.descr = "RA = ULONG_MAX, RB = ULONG_MAX",
.instr = ppc_inst(PPC_RAW_ADD_DOT(20, 21, 22)),
.regs = {
.gpr[21] = ULONG_MAX,
.gpr[22] = ULONG_MAX,
}
},
{
.descr = "RA = ULONG_MAX, RB = 0x1",
.instr = ppc_inst(PPC_RAW_ADD_DOT(20, 21, 22)),
.regs = {
.gpr[21] = ULONG_MAX,
.gpr[22] = 0x1,
}
},
{
.descr = "RA = INT_MIN, RB = INT_MIN",
.instr = ppc_inst(PPC_RAW_ADD_DOT(20, 21, 22)),
.regs = {
.gpr[21] = INT_MIN,
.gpr[22] = INT_MIN,
}
},
{
.descr = "RA = INT_MIN, RB = INT_MAX",
.instr = ppc_inst(PPC_RAW_ADD_DOT(20, 21, 22)),
.regs = {
.gpr[21] = INT_MIN,
.gpr[22] = INT_MAX,
}
},
{
.descr = "RA = INT_MAX, RB = INT_MAX",
.instr = ppc_inst(PPC_RAW_ADD_DOT(20, 21, 22)),
.regs = {
.gpr[21] = INT_MAX,
.gpr[22] = INT_MAX,
}
},
{
.descr = "RA = UINT_MAX, RB = UINT_MAX",
.instr = ppc_inst(PPC_RAW_ADD_DOT(20, 21, 22)),
.regs = {
.gpr[21] = UINT_MAX,
.gpr[22] = UINT_MAX,
}
},
{
.descr = "RA = UINT_MAX, RB = 0x1",
.instr = ppc_inst(PPC_RAW_ADD_DOT(20, 21, 22)),
.regs = {
.gpr[21] = UINT_MAX,
.gpr[22] = 0x1,
}
}
}
},
{
.mnemonic = "addc",
.subtests = {
{
.descr = "RA = LONG_MIN, RB = LONG_MIN",
.instr = ppc_inst(PPC_RAW_ADDC(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MIN,
.gpr[22] = LONG_MIN,
}
},
{
.descr = "RA = LONG_MIN, RB = LONG_MAX",
.instr = ppc_inst(PPC_RAW_ADDC(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MIN,
.gpr[22] = LONG_MAX,
}
},
{
.descr = "RA = LONG_MAX, RB = LONG_MAX",
.instr = ppc_inst(PPC_RAW_ADDC(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MAX,
.gpr[22] = LONG_MAX,
}
},
{
.descr = "RA = ULONG_MAX, RB = ULONG_MAX",
.instr = ppc_inst(PPC_RAW_ADDC(20, 21, 22)),
.regs = {
.gpr[21] = ULONG_MAX,
.gpr[22] = ULONG_MAX,
}
},
{
.descr = "RA = ULONG_MAX, RB = 0x1",
.instr = ppc_inst(PPC_RAW_ADDC(20, 21, 22)),
.regs = {
.gpr[21] = ULONG_MAX,
.gpr[22] = 0x1,
}
},
{
.descr = "RA = INT_MIN, RB = INT_MIN",
.instr = ppc_inst(PPC_RAW_ADDC(20, 21, 22)),
.regs = {
.gpr[21] = INT_MIN,
.gpr[22] = INT_MIN,
}
},
{
.descr = "RA = INT_MIN, RB = INT_MAX",
.instr = ppc_inst(PPC_RAW_ADDC(20, 21, 22)),
.regs = {
.gpr[21] = INT_MIN,
.gpr[22] = INT_MAX,
}
},
{
.descr = "RA = INT_MAX, RB = INT_MAX",
.instr = ppc_inst(PPC_RAW_ADDC(20, 21, 22)),
.regs = {
.gpr[21] = INT_MAX,
.gpr[22] = INT_MAX,
}
},
{
.descr = "RA = UINT_MAX, RB = UINT_MAX",
.instr = ppc_inst(PPC_RAW_ADDC(20, 21, 22)),
.regs = {
.gpr[21] = UINT_MAX,
.gpr[22] = UINT_MAX,
}
},
{
.descr = "RA = UINT_MAX, RB = 0x1",
.instr = ppc_inst(PPC_RAW_ADDC(20, 21, 22)),
.regs = {
.gpr[21] = UINT_MAX,
.gpr[22] = 0x1,
}
},
{
.descr = "RA = LONG_MIN | INT_MIN, RB = LONG_MIN | INT_MIN",
.instr = ppc_inst(PPC_RAW_ADDC(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MIN | (uint)INT_MIN,
.gpr[22] = LONG_MIN | (uint)INT_MIN,
}
}
}
},
{
.mnemonic = "addc.",
.subtests = {
{
.descr = "RA = LONG_MIN, RB = LONG_MIN",
.flags = IGNORE_CCR,
.instr = ppc_inst(PPC_RAW_ADDC_DOT(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MIN,
.gpr[22] = LONG_MIN,
}
},
{
.descr = "RA = LONG_MIN, RB = LONG_MAX",
.instr = ppc_inst(PPC_RAW_ADDC_DOT(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MIN,
.gpr[22] = LONG_MAX,
}
},
{
.descr = "RA = LONG_MAX, RB = LONG_MAX",
.flags = IGNORE_CCR,
.instr = ppc_inst(PPC_RAW_ADDC_DOT(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MAX,
.gpr[22] = LONG_MAX,
}
},
{
.descr = "RA = ULONG_MAX, RB = ULONG_MAX",
.instr = ppc_inst(PPC_RAW_ADDC_DOT(20, 21, 22)),
.regs = {
.gpr[21] = ULONG_MAX,
.gpr[22] = ULONG_MAX,
}
},
{
.descr = "RA = ULONG_MAX, RB = 0x1",
.instr = ppc_inst(PPC_RAW_ADDC_DOT(20, 21, 22)),
.regs = {
.gpr[21] = ULONG_MAX,
.gpr[22] = 0x1,
}
},
{
.descr = "RA = INT_MIN, RB = INT_MIN",
.instr = ppc_inst(PPC_RAW_ADDC_DOT(20, 21, 22)),
.regs = {
.gpr[21] = INT_MIN,
.gpr[22] = INT_MIN,
}
},
{
.descr = "RA = INT_MIN, RB = INT_MAX",
.instr = ppc_inst(PPC_RAW_ADDC_DOT(20, 21, 22)),
.regs = {
.gpr[21] = INT_MIN,
.gpr[22] = INT_MAX,
}
},
{
.descr = "RA = INT_MAX, RB = INT_MAX",
.instr = ppc_inst(PPC_RAW_ADDC_DOT(20, 21, 22)),
.regs = {
.gpr[21] = INT_MAX,
.gpr[22] = INT_MAX,
}
},
{
.descr = "RA = UINT_MAX, RB = UINT_MAX",
.instr = ppc_inst(PPC_RAW_ADDC_DOT(20, 21, 22)),
.regs = {
.gpr[21] = UINT_MAX,
.gpr[22] = UINT_MAX,
}
},
{
.descr = "RA = UINT_MAX, RB = 0x1",
.instr = ppc_inst(PPC_RAW_ADDC_DOT(20, 21, 22)),
.regs = {
.gpr[21] = UINT_MAX,
.gpr[22] = 0x1,
}
},
{
.descr = "RA = LONG_MIN | INT_MIN, RB = LONG_MIN | INT_MIN",
.instr = ppc_inst(PPC_RAW_ADDC_DOT(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MIN | (uint)INT_MIN,
.gpr[22] = LONG_MIN | (uint)INT_MIN,
}
}
}
},
{
.mnemonic = "divde",
.subtests = {
{
.descr = "RA = LONG_MIN, RB = LONG_MIN",
.instr = ppc_inst(PPC_RAW_DIVDE(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MIN,
.gpr[22] = LONG_MIN,
}
},
{
.descr = "RA = 1L, RB = 0",
.instr = ppc_inst(PPC_RAW_DIVDE(20, 21, 22)),
.flags = IGNORE_GPR(20),
.regs = {
.gpr[21] = 1L,
.gpr[22] = 0,
}
},
{
.descr = "RA = LONG_MIN, RB = LONG_MAX",
.instr = ppc_inst(PPC_RAW_DIVDE(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MIN,
.gpr[22] = LONG_MAX,
}
}
}
},
{
.mnemonic = "divde.",
.subtests = {
{
.descr = "RA = LONG_MIN, RB = LONG_MIN",
.instr = ppc_inst(PPC_RAW_DIVDE_DOT(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MIN,
.gpr[22] = LONG_MIN,
}
},
{
.descr = "RA = 1L, RB = 0",
.instr = ppc_inst(PPC_RAW_DIVDE_DOT(20, 21, 22)),
.flags = IGNORE_GPR(20),
.regs = {
.gpr[21] = 1L,
.gpr[22] = 0,
}
},
{
.descr = "RA = LONG_MIN, RB = LONG_MAX",
.instr = ppc_inst(PPC_RAW_DIVDE_DOT(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MIN,
.gpr[22] = LONG_MAX,
}
}
}
},
{
.mnemonic = "divdeu",
.subtests = {
{
.descr = "RA = LONG_MIN, RB = LONG_MIN",
.instr = ppc_inst(PPC_RAW_DIVDEU(20, 21, 22)),
.flags = IGNORE_GPR(20),
.regs = {
.gpr[21] = LONG_MIN,
.gpr[22] = LONG_MIN,
}
},
{
.descr = "RA = 1L, RB = 0",
.instr = ppc_inst(PPC_RAW_DIVDEU(20, 21, 22)),
.flags = IGNORE_GPR(20),
.regs = {
.gpr[21] = 1L,
.gpr[22] = 0,
}
},
{
.descr = "RA = LONG_MIN, RB = LONG_MAX",
.instr = ppc_inst(PPC_RAW_DIVDEU(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MIN,
.gpr[22] = LONG_MAX,
}
},
{
.descr = "RA = LONG_MAX - 1, RB = LONG_MAX",
.instr = ppc_inst(PPC_RAW_DIVDEU(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MAX - 1,
.gpr[22] = LONG_MAX,
}
},
{
.descr = "RA = LONG_MIN + 1, RB = LONG_MIN",
.instr = ppc_inst(PPC_RAW_DIVDEU(20, 21, 22)),
.flags = IGNORE_GPR(20),
.regs = {
.gpr[21] = LONG_MIN + 1,
.gpr[22] = LONG_MIN,
}
}
}
},
{
.mnemonic = "divdeu.",
.subtests = {
{
.descr = "RA = LONG_MIN, RB = LONG_MIN",
.instr = ppc_inst(PPC_RAW_DIVDEU_DOT(20, 21, 22)),
.flags = IGNORE_GPR(20),
.regs = {
.gpr[21] = LONG_MIN,
.gpr[22] = LONG_MIN,
}
},
{
.descr = "RA = 1L, RB = 0",
.instr = ppc_inst(PPC_RAW_DIVDEU_DOT(20, 21, 22)),
.flags = IGNORE_GPR(20),
.regs = {
.gpr[21] = 1L,
.gpr[22] = 0,
}
},
{
.descr = "RA = LONG_MIN, RB = LONG_MAX",
.instr = ppc_inst(PPC_RAW_DIVDEU_DOT(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MIN,
.gpr[22] = LONG_MAX,
}
},
{
.descr = "RA = LONG_MAX - 1, RB = LONG_MAX",
.instr = ppc_inst(PPC_RAW_DIVDEU_DOT(20, 21, 22)),
.regs = {
.gpr[21] = LONG_MAX - 1,
.gpr[22] = LONG_MAX,
}
},
{
.descr = "RA = LONG_MIN + 1, RB = LONG_MIN",
.instr = ppc_inst(PPC_RAW_DIVDEU_DOT(20, 21, 22)),
.flags = IGNORE_GPR(20),
.regs = {
.gpr[21] = LONG_MIN + 1,
.gpr[22] = LONG_MIN,
}
}
}
},
{
.mnemonic = "paddi",
.cpu_feature = CPU_FTR_ARCH_31,
.subtests = {
{
.descr = "RA = LONG_MIN, SI = SI_MIN, R = 0",
.instr = TEST_PADDI(21, 22, SI_MIN, 0),
.regs = {
.gpr[21] = 0,
.gpr[22] = LONG_MIN,
}
},
{
.descr = "RA = LONG_MIN, SI = SI_MAX, R = 0",
.instr = TEST_PADDI(21, 22, SI_MAX, 0),
.regs = {
.gpr[21] = 0,
.gpr[22] = LONG_MIN,
}
},
{
.descr = "RA = LONG_MAX, SI = SI_MAX, R = 0",
.instr = TEST_PADDI(21, 22, SI_MAX, 0),
.regs = {
.gpr[21] = 0,
.gpr[22] = LONG_MAX,
}
},
{
.descr = "RA = ULONG_MAX, SI = SI_UMAX, R = 0",
.instr = TEST_PADDI(21, 22, SI_UMAX, 0),
.regs = {
.gpr[21] = 0,
.gpr[22] = ULONG_MAX,
}
},
{
.descr = "RA = ULONG_MAX, SI = 0x1, R = 0",
.instr = TEST_PADDI(21, 22, 0x1, 0),
.regs = {
.gpr[21] = 0,
.gpr[22] = ULONG_MAX,
}
},
{
.descr = "RA = INT_MIN, SI = SI_MIN, R = 0",
.instr = TEST_PADDI(21, 22, SI_MIN, 0),
.regs = {
.gpr[21] = 0,
.gpr[22] = INT_MIN,
}
},
{
.descr = "RA = INT_MIN, SI = SI_MAX, R = 0",
.instr = TEST_PADDI(21, 22, SI_MAX, 0),
.regs = {
.gpr[21] = 0,
.gpr[22] = INT_MIN,
}
},
{
.descr = "RA = INT_MAX, SI = SI_MAX, R = 0",
.instr = TEST_PADDI(21, 22, SI_MAX, 0),
.regs = {
.gpr[21] = 0,
.gpr[22] = INT_MAX,
}
},
{
.descr = "RA = UINT_MAX, SI = 0x1, R = 0",
.instr = TEST_PADDI(21, 22, 0x1, 0),
.regs = {
.gpr[21] = 0,
.gpr[22] = UINT_MAX,
}
},
{
.descr = "RA = UINT_MAX, SI = SI_MAX, R = 0",
.instr = TEST_PADDI(21, 22, SI_MAX, 0),
.regs = {
.gpr[21] = 0,
.gpr[22] = UINT_MAX,
}
},
{
.descr = "RA is r0, SI = SI_MIN, R = 0",
.instr = TEST_PADDI(21, 0, SI_MIN, 0),
.regs = {
.gpr[21] = 0x0,
}
},
{
.descr = "RA = 0, SI = SI_MIN, R = 0",
.instr = TEST_PADDI(21, 22, SI_MIN, 0),
.regs = {
.gpr[21] = 0x0,
.gpr[22] = 0x0,
}
},
{
.descr = "RA is r0, SI = 0, R = 1",
.instr = TEST_PADDI(21, 0, 0, 1),
.regs = {
.gpr[21] = 0,
}
},
{
.descr = "RA is r0, SI = SI_MIN, R = 1",
.instr = TEST_PADDI(21, 0, SI_MIN, 1),
.regs = {
.gpr[21] = 0,
}
},
/* Invalid instruction form with R = 1 and RA != 0 */
{
.descr = "RA = R22(0), SI = 0, R = 1",
.instr = TEST_PADDI(21, 22, 0, 1),
.flags = NEGATIVE_TEST,
.regs = {
.gpr[21] = 0,
.gpr[22] = 0,
}
}
}
}
};
static int __init emulate_compute_instr(struct pt_regs *regs,
ppc_inst_t instr,
bool negative)
{
int analysed;
struct instruction_op op;
if (!regs || !ppc_inst_val(instr))
return -EINVAL;
/* This is not a return frame regs */
regs->nip = patch_site_addr(&patch__exec_instr);
analysed = analyse_instr(&op, regs, instr);
if (analysed != 1 || GETTYPE(op.type) != COMPUTE) {
if (negative)
return -EFAULT;
pr_info("emulation failed, instruction = %08lx\n", ppc_inst_as_ulong(instr));
return -EFAULT;
}
if (analysed == 1 && negative)
pr_info("negative test failed, instruction = %08lx\n", ppc_inst_as_ulong(instr));
if (!negative)
emulate_update_regs(regs, &op);
return 0;
}
static int __init execute_compute_instr(struct pt_regs *regs,
ppc_inst_t instr)
{
extern int exec_instr(struct pt_regs *regs);
if (!regs || !ppc_inst_val(instr))
return -EINVAL;
/* Patch the NOP with the actual instruction */
patch_instruction_site(&patch__exec_instr, instr);
if (exec_instr(regs)) {
pr_info("execution failed, instruction = %08lx\n", ppc_inst_as_ulong(instr));
return -EFAULT;
}
return 0;
}
#define gpr_mismatch(gprn, exp, got) \
pr_info("GPR%u mismatch, exp = 0x%016lx, got = 0x%016lx\n", \
gprn, exp, got)
#define reg_mismatch(name, exp, got) \
pr_info("%s mismatch, exp = 0x%016lx, got = 0x%016lx\n", \
name, exp, got)
static void __init run_tests_compute(void)
{
unsigned long flags;
struct compute_test *test;
struct pt_regs *regs, exp, got;
unsigned int i, j, k;
ppc_inst_t instr;
bool ignore_gpr, ignore_xer, ignore_ccr, passed, rc, negative;
for (i = 0; i < ARRAY_SIZE(compute_tests); i++) {
test = &compute_tests[i];
if (test->cpu_feature && !early_cpu_has_feature(test->cpu_feature)) {
show_result(test->mnemonic, "SKIP (!CPU_FTR)");
continue;
}
for (j = 0; j < MAX_SUBTESTS && test->subtests[j].descr; j++) {
instr = test->subtests[j].instr;
flags = test->subtests[j].flags;
regs = &test->subtests[j].regs;
negative = flags & NEGATIVE_TEST;
ignore_xer = flags & IGNORE_XER;
ignore_ccr = flags & IGNORE_CCR;
passed = true;
memcpy(&exp, regs, sizeof(struct pt_regs));
memcpy(&got, regs, sizeof(struct pt_regs));
/*
* Set a compatible MSR value explicitly to ensure
* that XER and CR bits are updated appropriately
*/
exp.msr = MSR_KERNEL;
got.msr = MSR_KERNEL;
rc = emulate_compute_instr(&got, instr, negative) != 0;
if (negative) {
/* skip executing instruction */
passed = rc;
goto print;
} else if (rc || execute_compute_instr(&exp, instr)) {
passed = false;
goto print;
}
/* Verify GPR values */
for (k = 0; k < 32; k++) {
ignore_gpr = flags & IGNORE_GPR(k);
if (!ignore_gpr && exp.gpr[k] != got.gpr[k]) {
passed = false;
gpr_mismatch(k, exp.gpr[k], got.gpr[k]);
}
}
/* Verify LR value */
if (exp.link != got.link) {
passed = false;
reg_mismatch("LR", exp.link, got.link);
}
/* Verify XER value */
if (!ignore_xer && exp.xer != got.xer) {
passed = false;
reg_mismatch("XER", exp.xer, got.xer);
}
/* Verify CR value */
if (!ignore_ccr && exp.ccr != got.ccr) {
passed = false;
reg_mismatch("CR", exp.ccr, got.ccr);
}
print:
show_result_with_descr(test->mnemonic,
test->subtests[j].descr,
passed ? "PASS" : "FAIL");
}
}
}
static int __init test_emulate_step(void)
{
printk(KERN_INFO "Running instruction emulation self-tests ...\n");
run_tests_load_store();
run_tests_compute();
return 0;
}
late_initcall(test_emulate_step);