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powerpc/sstep: Add tests for prefixed integer load/stores

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Add tests for the prefixed versions of the integer load/stores that
are currently tested. This includes the following instructions:
  * Prefixed Load Doubleword (pld)
  * Prefixed Load Word and Zero (plwz)
  * Prefixed Store Doubleword (pstd)

Skip the new tests if ISA v3.1 is unsupported.

Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
[mpe: Fix conflicts with ppc-opcode.h changes]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200525025923.19843-1-jniethe5@gmail.com
This commit is contained in:
Jordan Niethe 2020-05-25 12:59:19 +10:00 committed by Michael Ellerman
parent 1cade527f6
commit b6b54b4272
2 changed files with 94 additions and 0 deletions
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9
arch/powerpc/include/asm/ppc-opcode.h
View File

@ -265,6 +265,14 @@
#define PPC_INST_BRANCH 0x48000000
#define PPC_INST_BRANCH_COND 0x40800000
/* Prefixes */
#define PPC_PREFIX_MLS 0x06000000
#define PPC_PREFIX_8LS 0x04000000
/* Prefixed instructions */
#define PPC_INST_PLD 0xe4000000
#define PPC_INST_PSTD 0xf4000000
/* macros to insert fields into opcodes */
#define ___PPC_RA(a) (((a) & 0x1f) << 16)
#define ___PPC_RB(b) (((b) & 0x1f) << 11)
@ -296,6 +304,7 @@
#define __PPC_CT(t) (((t) & 0x0f) << 21)
#define __PPC_SPR(r) ((((r) & 0x1f) << 16) | ((((r) >> 5) & 0x1f) << 11))
#define __PPC_RC21 (0x1 << 10)
#define __PPC_PRFX_R(r) (((r) & 0x1) << 20)
/*
* Both low and high 16 bits are added as SIGNED additions, so if low 16 bits

85
arch/powerpc/lib/test_emulate_step.c
View File

@ -19,6 +19,18 @@
#define IGNORE_XER (0x1UL << 32)
#define IGNORE_CCR (0x1UL << 33)
#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))
static void __init init_pt_regs(struct pt_regs *regs)
{
static unsigned long msr;
@ -70,6 +82,29 @@ static void __init test_ld(void)
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(&regs);
regs.gpr[3] = (unsigned long)&a;
/* pld r5, 0(r3), 0 */
stepped = emulate_step(&regs, 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;
@ -88,6 +123,30 @@ static void __init test_lwz(void)
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(&regs);
regs.gpr[3] = (unsigned long)&a;
/* plwz r5, 0(r3), 0 */
stepped = emulate_step(&regs, 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;
@ -125,6 +184,29 @@ static void __init test_std(void)
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(&regs);
regs.gpr[3] = (unsigned long)&a;
regs.gpr[5] = 0x5678;
/* pstd r5, 0(r3), 0 */
stepped = emulate_step(&regs, 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;
@ -404,9 +486,12 @@ static void __init test_lxvd2x_stxvd2x(void)
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_lfdx_stfdx();