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[v3,10/13] KVM: selftests: x86: Assert that both XTILE{CFG,DATA} are XSAVE-enabled

Message ID 20230221163655.920289-11-mizhang@google.com (mailing list archive)
State New, archived
Headers show
Series Overhauling amx_test | expand

Commit Message

Mingwei Zhang Feb. 21, 2023, 4:36 p.m. UTC 
From: Aaron Lewis <aaronlewis@google.com>

Assert that both XTILE{CFG,DATA} are XSAVE-enabled.  The original check in
amx_test only ensures at least one of the XTILE bits are set, XTILECFG or
XTILEDATA, when it really should be checking that both are set.

Assert that both XTILECFG and XTILEDATA a set.

Fixes: bf70636d9443 ("selftest: kvm: Add amx selftest")
Signed-off-by: Aaron Lewis <aaronlewis@google.com>
Signed-off-by: Mingwei Zhang <mizhang@google.com>
---
 tools/testing/selftests/kvm/x86_64/amx_test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/tools/testing/selftests/kvm/x86_64/amx_test.c b/tools/testing/selftests/kvm/x86_64/amx_test.c
index d1fbf8936192..1a1565126255 100644
--- a/tools/testing/selftests/kvm/x86_64/amx_test.c
+++ b/tools/testing/selftests/kvm/x86_64/amx_test.c
@@ -161,7 +161,7 @@  static void init_regs(void)
 	xcr0 = __xgetbv(0);
 	xcr0 |= XFEATURE_MASK_XTILE;
 	__xsetbv(0x0, xcr0);
-	GUEST_ASSERT(__xgetbv(0) & XFEATURE_MASK_XTILE);
+	GUEST_ASSERT((__xgetbv(0) & XFEATURE_MASK_XTILE) == XFEATURE_MASK_XTILE);
 }
 
 static void __attribute__((__flatten__)) guest_code(struct tile_config *amx_cfg,