From: bugzilla-daemon@bugzilla.kernel.org
To: kvm@vger.kernel.org
Subject: [Bug 214165] New: Missing clflush before RECEIVE_UPDATE_DATA
Date: Tue, 24 Aug 2021 11:52:46 +0000 [thread overview]
Message-ID: <bug-214165-28872@https.bugzilla.kernel.org/> (raw)
https://bugzilla.kernel.org/show_bug.cgi?id=214165
Bug ID: 214165
Summary: Missing clflush before RECEIVE_UPDATE_DATA
Product: Virtualization
Version: unspecified
Kernel Version: 5.13.12
Hardware: x86-64
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: kvm
Assignee: virtualization_kvm@kernel-bugs.osdl.org
Reporter: masa.koz@seera-networks.com
Regression: No
Created attachment 298457
--> https://bugzilla.kernel.org/attachment.cgi?id=298457&action=edit
Add the missing sev_clflush_pages()
In sev_receive_update_data(), sev_clflush_pages() is not called b/w
sev_pin_memory() and RECEIVE_UPDATE_DATA. Because of this missing, we will
often see the pre-written contents in the memory updated by
RECEIVE_UPDATE_DATA. I guess that we should call sev_clflush_pages() as
LAUNCH_UPDATE_DATA.
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next reply other threads:[~2021-08-24 11:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-24 11:52 bugzilla-daemon [this message]
2021-09-13 23:06 ` [Bug 214165] Missing clflush before RECEIVE_UPDATE_DATA bugzilla-daemon
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