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kselftest/arm64: Teach the generic signal context validation about ZT

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Add ZT to the set of signal contexts that the shared code understands and
validates the form of.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20221208-arm64-sme2-v4-17-f2fa0aef982f@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Mark Brown 2023-01-16 16:04:52 +00:00 committed by Catalin Marinas
parent 6382937326
commit afe6f18275
2 changed files with 37 additions and 0 deletions
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36
tools/testing/selftests/arm64/signal/testcases/testcases.c
View File

@ -108,6 +108,26 @@ bool validate_za_context(struct za_context *za, char **err)
return true;
}
bool validate_zt_context(struct zt_context *zt, char **err)
{
if (!zt || !err)
return false;
/* If the context is present there should be at least one register */
if (zt->nregs == 0) {
*err = "no registers";
return false;
}
/* Size should agree with the number of registers */
if (zt->head.size != ZT_SIG_CONTEXT_SIZE(zt->nregs)) {
*err = "register count does not match size";
return false;
}
return true;
}
bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err)
{
bool terminated = false;
@ -117,6 +137,7 @@ bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err)
struct extra_context *extra = NULL;
struct sve_context *sve = NULL;
struct za_context *za = NULL;
struct zt_context *zt = NULL;
struct _aarch64_ctx *head =
(struct _aarch64_ctx *)uc->uc_mcontext.__reserved;
void *extra_data = NULL;
@ -177,6 +198,13 @@ bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err)
za = (struct za_context *)head;
new_flags |= ZA_CTX;
break;
case ZT_MAGIC:
if (flags & ZT_CTX)
*err = "Multiple ZT_MAGIC";
/* Size is validated in validate_za_context() */
zt = (struct zt_context *)head;
new_flags |= ZT_CTX;
break;
case EXTRA_MAGIC:
if (flags & EXTRA_CTX)
*err = "Multiple EXTRA_MAGIC";
@ -234,6 +262,9 @@ bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err)
if (new_flags & ZA_CTX)
if (!validate_za_context(za, err))
return false;
if (new_flags & ZT_CTX)
if (!validate_zt_context(zt, err))
return false;
flags |= new_flags;
@ -245,6 +276,11 @@ bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err)
return false;
}
if (terminated && (flags & ZT_CTX) && !(flags & ZA_CTX)) {
*err = "ZT context but no ZA context";
return false;
}
return true;
}

1
tools/testing/selftests/arm64/signal/testcases/testcases.h
View File

@ -18,6 +18,7 @@
#define SVE_CTX (1 << 1)
#define ZA_CTX (1 << 2)
#define EXTRA_CTX (1 << 3)
#define ZT_CTX (1 << 4)
#define KSFT_BAD_MAGIC 0xdeadbeef