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tests/trace: Add a couple of tests of CIABR function

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Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
This commit is contained in:
Paul Mackerras
2025-01-13 22:00:00 +11:00
parent 5a28f76b6f
commit f64ab6569d
4 changed files with 51 additions and 1 deletions
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BIN
tests/test_trace.bin
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1
tests/test_trace.console_out
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@@ -7,3 +7,4 @@ test 06:PASS
test 07:PASS
test 08:PASS
test 09:PASS
test 10:PASS

13
tests/trace/head.S
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@@ -224,3 +224,16 @@ test8:
test9:
sc
blr
.global test10
test10:
addi %r3,%r3,1
addi %r4,%r4,2
addi %r3,%r3,4
addi %r4,%r4,8
cmpd %r3,%r4
bne 1f
nop
nop
1: li %r3,-1
blr

38
tests/trace/trace.c
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@@ -7,7 +7,6 @@
extern unsigned long callit(unsigned long arg1, unsigned long arg2,
unsigned long (*fn)(unsigned long, unsigned long),
unsigned long msr, unsigned long *regs);
#define MSR_FP 0x2000
#define MSR_SE 0x400
#define MSR_BE 0x200
@@ -16,6 +15,7 @@ extern unsigned long callit(unsigned long arg1, unsigned long arg2,
#define SRR1 27
#define SPRG0 272
#define SPRG1 273
#define CIABR 187
static inline unsigned long mfmsr(void)
{
@@ -218,6 +218,41 @@ int trace_test_9(void)
return 0;
}
extern unsigned long test10(unsigned long, unsigned long);
int trace_test_10(void)
{
unsigned long ret;
unsigned long regs[2];
mtspr(CIABR, (unsigned long)&test10 + 4 + 3);
ret = callit(1, 1, test10, mfmsr(), regs);
if (ret != 0xd00 || mfspr(SRR0) != (unsigned long)&test10 + 8)
return ret + 1;
if ((mfspr(SRR1) & 0x781f0000) != 0x40100000)
return ret + 2;
if (regs[0] != 2 || regs[1] != 3)
return 3;
/* test CIABR on a taken branch */
mtspr(CIABR, (unsigned long)&test10 + 20 + 3);
ret = callit(1, 1, test10, mfmsr(), regs);
if (ret != 0xd00 || mfspr(SRR0) != (unsigned long)&test10 + 32)
return ret + 4;
if ((mfspr(SRR1) & 0x781f0000) != 0x40100000)
return ret + 5;
if (regs[0] != 6 || regs[1] != 11)
return 6;
/* test CIABR with PRIV = problem state */
mtspr(CIABR, (unsigned long)&test10 + 1);
ret = callit(1, 1, test10, mfmsr(), regs);
if (ret != 0)
return ret + 7;
/* don't have page tables so can't actually run in problem state */
return 0;
}
int fail = 0;
void do_test(int num, int (*test)(void))
@@ -249,6 +284,7 @@ int main(void)
do_test(7, trace_test_7);
do_test(8, trace_test_8);
do_test(9, trace_test_9);
do_test(10, trace_test_10);
return fail;
}