linux-kernel - [PATCH v2 10/42] KVM: selftests: Check for _both

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220614200707.3315957-11-seanjc@google.com>
Date:   Tue, 14 Jun 2022 20:06:35 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Sean Christopherson <seanjc@...gle.com>,
        Jim Mattson <jmattson@...gle.com>
Subject: [PATCH v2 10/42] KVM: selftests: Check for _both_ XTILE data and cfg
 in AMX test

Check for _both_ XTILE data and cfg support in the AMX test instead of
checking for _either_ feature.  Practically speaking, no sane CPU or vCPU
will support one but not the other, but the effective "or" behavior is
subtle and technically incorrect.

Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 tools/testing/selftests/kvm/x86_64/amx_test.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kvm/x86_64/amx_test.c b/tools/testing/selftests/kvm/x86_64/amx_test.c
index 7127873bb0cb..dcad838953d0 100644
--- a/tools/testing/selftests/kvm/x86_64/amx_test.c
+++ b/tools/testing/selftests/kvm/x86_64/amx_test.c
@@ -335,7 +335,8 @@ int main(int argc, char *argv[])
 	TEST_REQUIRE(kvm_get_cpuid_max_basic() >= 0xd);
 
 	entry = kvm_get_supported_cpuid_index(0xd, 0);
-	TEST_REQUIRE(entry->eax & XFEATURE_MASK_XTILE);
+	TEST_REQUIRE(entry->eax & XFEATURE_MASK_XTILECFG);
+	TEST_REQUIRE(entry->eax & XFEATURE_MASK_XTILEDATA);
 
 	/* Get xsave/restore max size */
 	xsave_restore_size = entry->ecx;
-- 
2.36.1.476.g0c4daa206d-goog