* [Bug 214165] New: Missing clflush before RECEIVE_UPDATE_DATA
@ 2021-08-24 11:52 bugzilla-daemon
2021-09-13 23:06 ` [Bug 214165] " bugzilla-daemon
0 siblings, 1 reply; 2+ messages in thread
From: bugzilla-daemon @ 2021-08-24 11:52 UTC (permalink / raw)
To: kvm
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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* [Bug 214165] Missing clflush before RECEIVE_UPDATE_DATA
2021-08-24 11:52 [Bug 214165] New: Missing clflush before RECEIVE_UPDATE_DATA bugzilla-daemon
@ 2021-09-13 23:06 ` bugzilla-daemon
0 siblings, 0 replies; 2+ messages in thread
From: bugzilla-daemon @ 2021-09-13 23:06 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=214165
Sean Christopherson (seanjc@google.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |seanjc@google.com
--- Comment #1 from Sean Christopherson (seanjc@google.com) ---
If you can provided a Signed-off-by, I'll happily write a changelog and post
the patch on your behalf. Thanks!
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