s390/uv: de-duplicate checks for Protected Host Virtualization

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De-duplicate checks for Protected Host Virtualization in decompressor and
kernel.

Set prot_virt_host=0 in the decompressor in *any* of the following cases
and hand it over to the decompressed kernel:
* No explicit prot_virt=1 is given on the kernel command-line
* Protected Guest Virtualization is enabled
* Hardware support not present
* kdump or stand-alone dump

The decompressed kernel needs to use only is_prot_virt_host() instead of
performing again all checks done by the decompressor.

Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

...

This commit is contained in:

Alexander Egorenkov 2021-06-25 09:51:15 +02:00 • committed by Heiko Carstens

parent 42c89439b9

commit 7f33565b25

2 changed files with 21 additions and 34 deletions

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42

arch/s390/boot/uv.c

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15

arch/s390/kernel/uv.c

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