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(parent: 40c4590) | patch
x86/fsgsbase: Fix Xen PV support
authorAndy Lutomirski <luto@kernel.org>
Fri, 26 Jun 2020 17:24:30 +0000 (10:24 -0700)
committerThomas Gleixner <tglx@linutronix.de>
Wed, 1 Jul 2020 13:27:20 +0000 (15:27 +0200)
commitd029bff60aa6c7eab281d52602b6a7a971615324
treebc6aadea2b2a234361696aff4a6a9d2ac1564d36tree | snapshot
parent40c45904f818c1f6555294ca27afc5fda4f09e68commit | diff
x86/fsgsbase: Fix Xen PV support

On Xen PV, SWAPGS doesn't work.  Teach __rdfsbase_inactive() and
__wrgsbase_inactive() to use rdmsrl()/wrmsrl() on Xen PV.  The Xen
pvop code will understand this and issue the correct hypercalls.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/f07c08f178fe9711915862b656722a207cd52c28.1593192140.git.luto@kernel.org
arch/x86/kernel/process_64.c diff | blob | history
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