x86/hyperv: Initialize GHCB page in Isolation VM

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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>

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Tianyu Lan 2021-10-25 08:21:06 -04:00 • committed by Wei Liu

parent e82f2069b5

commit 0cc4f6d9f0

4 changed files with 74 additions and 7 deletions

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68

arch/x86/hyperv/hv_init.c

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4

arch/x86/include/asm/mshyperv.h

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3

arch/x86/kernel/cpu/mshyperv.c

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6

include/asm-generic/mshyperv.h

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