GitHub-Mirror/linux-bl808
2
0
Fork 0
mirror of https://github.com/Fishwaldo/linux-bl808.git synced 2025-06-17 20:25:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

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

Browse source 
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
This commit is contained in:
Thiago Jung Bauermann 2019-08-06 01:49:18 -03:00 • committed by Michael Ellerman
parent 284e21fab2
commit ae7eb82a92
5 changed files with 23 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

1
include/linux/mem_encrypt.h
View file

@ -19,7 +19,6 @@
#else /* !CONFIG_ARCH_HAS_MEM_ENCRYPT */
static inline bool mem_encrypt_active(void) { return false; }
static inline bool sev_active(void) { return false; }
#endif /* CONFIG_ARCH_HAS_MEM_ENCRYPT */