[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [PATCH] x86/svm: Fix handling of EFLAGS.RF on task switch

On 03.12.19 23:30, Andrew Cooper wrote:
VT-x updates RF before vmexit, so eflags written into the outgoing TSS happens
to be correct.  SVM does not update RF before vmexit, and instead provides it
via a bit in exitinfo2.

In practice, needing RF set in the outgoing state occurs when a task gate is
used to handle faults.

Extend hvm_task_switch() with an extra_eflags parameter which gets fed into
the outgoing TSS, and fill it in suitably from the SVM vmexit information.

Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Release-acked-by: Juergen Gross <jgross@xxxxxxxx>


Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.