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KVM: selftests: Assert that both XTILE{CFG,DATA} are XSAVE-enabled

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Assert that both XTILE{CFG,DATA} are written and read back via XSETBV and
XGETBV respectively.  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.

Fixes: bf70636d94 ("selftest: kvm: Add amx selftest")
Signed-off-by: Aaron Lewis <aaronlewis@google.com>
Signed-off-by: Mingwei Zhang <mizhang@google.com>
Link: https://lore.kernel.org/r/20230221163655.920289-11-mizhang@google.com
[sean: massage changelog]
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Aaron Lewis 2023-02-21 16:36:52 +00:00 committed by Sean Christopherson
parent 7e1075f050
commit 2ab3991b0b
1 changed files with 1 additions and 1 deletions
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tools/testing/selftests/kvm/x86_64/amx_test.c
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@ -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,