On Fri, Jul 14, 2023 at 03:28:26PM -0500, Tom Lendacky wrote: > Commit 63c50d3ff2854a76432b752af4f2a76f33ff1974 changed the check that is > used to determine if SEV-ES is active. Originally, a CMP instruction with > a supporting JZ instruction was used for the check. It was changed to use > the BT instruction but not JZ instruction. The result of a BT instruction > changes the the carry flag (CF) and not the zero flag (ZF). As a result, > the wrong condition is being checked. Update the JZ to a JNC to properly > detect if SEV-ES is active.
What is the effect of this bug? Is it just the encryption sanity check being skipped? take care, Gerd -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#108817): https://edk2.groups.io/g/devel/message/108817 Mute This Topic: https://groups.io/mt/100149226/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
