tree 6b38683b18f98bd2a5950149d5d2d29793833cdb
parent e82f2069b52fb350f4ea568957dcc5c9f3649999
author Tianyu Lan <Tianyu.Lan@microsoft.com> 1635164466 -0400
committer Wei Liu <wei.liu@kernel.org> 1635418072 +0000

x86/hyperv: Initialize GHCB page in Isolation VM

Hyperv exposes GHCB page via SEV ES GHCB MSR for SNP guest
to communicate with hypervisor. Map GHCB page for all
cpus to read/write MSR register and submit hvcall request
via ghcb page.

Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
Link: https://lore.kernel.org/r/20211025122116.264793-2-ltykernel@gmail.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>