Linux Kernel Selftest development
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From: Mingwei Zhang <mizhang@google.com>
To: kvm@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org,
	Jim Mattson <jmattson@google.com>,
	Venkatesh Srinivas <venkateshs@google.com>,
	Aaron Lewis <aaronlewis@google.com>,
	Mingwei Zhang <mizhang@google.com>
Subject: [PATCH 1/4] KVM: selftests: x86: Fix an error in comment of amx_test
Date: Tue, 10 Jan 2023 18:58:20 +0000	[thread overview]
Message-ID: <20230110185823.1856951-2-mizhang@google.com> (raw)
In-Reply-To: <20230110185823.1856951-1-mizhang@google.com>

After the execution of __tilerelease(), AMX component will be in INIT
state. Therefore, execution of xsavec saving the AMX state into memory will
cause the XSTATE_BV[18] cleared in xheader. However, the XCOMP_BV[18] will
remain set. Fix the error in comment.

Cc: Jim Mattson <jmattson@google.com>
Cc: Venkatesh Srinivas <venkateshs@google.com>
Cc: 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(-)

diff --git a/tools/testing/selftests/kvm/x86_64/amx_test.c b/tools/testing/selftests/kvm/x86_64/amx_test.c
index bd72c6eb3b67..16533949a189 100644
--- a/tools/testing/selftests/kvm/x86_64/amx_test.c
+++ b/tools/testing/selftests/kvm/x86_64/amx_test.c
@@ -204,7 +204,7 @@ static void __attribute__((__flatten__)) guest_code(struct tile_config *amx_cfg,
 	GUEST_SYNC(4);
 	__tilerelease();
 	GUEST_SYNC(5);
-	/* bit 18 not in the XCOMP_BV after xsavec() */
+	/* bit 18 not in the XSTATE_BV after xsavec() */
 	set_xstatebv(xsave_data, XFEATURE_MASK_XTILEDATA);
 	__xsavec(xsave_data, XFEATURE_MASK_XTILEDATA);
 	GUEST_ASSERT((get_xstatebv(xsave_data) & XFEATURE_MASK_XTILEDATA) == 0);
-- 
2.39.0.314.g84b9a713c41-goog


  reply	other threads:[~2023-01-10 18:59 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-10 18:58 [PATCH 0/4] Add extra checkings to amx_test Mingwei Zhang
2023-01-10 18:58 ` Mingwei Zhang [this message]
2023-02-08  1:13   ` [PATCH 1/4] KVM: selftests: x86: Fix an error in comment of amx_test Sean Christopherson
2023-02-13 18:57     ` Mingwei Zhang
2023-01-10 18:58 ` [PATCH 2/4] KVM: selftests: x86: Add check of IA32_XFD in amx_test Mingwei Zhang
2023-02-08  1:17   ` Sean Christopherson
2023-01-10 18:58 ` [PATCH 3/4] KVM: selftests: x86: Enable checking on xcomp_bv " Mingwei Zhang
2023-02-08  1:43   ` Sean Christopherson
2023-01-10 18:58 ` [PATCH 4/4] KVM: selftests: x86: Repeat the checking of xheader when IA32_XFD[18] is set " Mingwei Zhang
2023-02-08  1:48   ` Sean Christopherson

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