tree 437ed5313f25e22610f994171ecc7a355ba62590
parent 284e21fab2cfcf90dacce565e0b12f29e5df00c1
author Thiago Jung Bauermann <bauerman@linux.ibm.com> 1565066958 -0300
committer Michael Ellerman <mpe@ellerman.id.au> 1565355130 +1000

fs/core/vmcore: Move sev_active() reference to x86 arch code

Secure Encrypted Virtualization is an x86-specific feature, so it shouldn't
appear in generic kernel code because it forces non-x86 architectures to
define the sev_active() function, which doesn't make a lot of sense.

To solve this problem, add an x86 elfcorehdr_read() function to override
the generic weak implementation. To do that, it's necessary to make
read_from_oldmem() public so that it can be used outside of vmcore.c.

Also, remove the export for sev_active() since it's only used in files that
won't be built as modules.

Signed-off-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Lianbo Jiang <lijiang@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190806044919.10622-6-bauerman@linux.ibm.com