On 3/22/2022 5:02 PM, Gerd Hoffmann wrote:
On Thu, Mar 17, 2022 at 09:58:49PM +0800, Xiaoyao Li wrote:
Add sept-ve-disable property for tdx-guest object. It's used to
configure bit 28 of TD attributes.
What is this?
It seems this bit doesn't show up in the public spec yet.
Bit 28 (SEPT_VE_DISABLE): Disable EPT violation conversion to #VE ON
guest TD ACCESS of PENDING pages.
The TDX architecture requires a private page to be accepted before
using. If guest accesses a not-accepted (pending) page it will get #VE.
For some OS, e.g., Linux TD guest, it doesn't want the #VE on pending
page so it will set this bit.
--- a/qapi/qom.json
+++ b/qapi/qom.json
@@ -792,10 +792,13 @@
#
# @attributes: TDX guest's attributes (default: 0)
#
+# @sept-ve-disable: attributes.sept-ve-disable[bit 28] (default: 0)
I'd suggest to document this here.
thanks,
Gerd
