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| author |   Thiago Jung Bauermann <bauerman@linux.ibm.com> | 2019-08-06 01:49:18 -0300 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2019-08-09 22:52:10 +1000 |
| commit | ae7eb82a92fae4d255a0caa9f7c0f99e3babfec1 (patch) | |
| tree | 437ed5313f25e22610f994171ecc7a355ba62590 /fs/proc | |
| parent | x86, s390/mm: Move sme_active() and sme_me_mask to x86-specific header (diff) | |
| download | linux-dev-ae7eb82a92fae4d255a0caa9f7c0f99e3babfec1.tar.xz linux-dev-ae7eb82a92fae4d255a0caa9f7c0f99e3babfec1.zip | |
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
Diffstat (limited to 'fs/proc')
| -rw-r--r-- | fs/proc/vmcore.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c index 7bcc92add72c..7b13988796e1 100644 --- a/fs/proc/vmcore.c +++ b/fs/proc/vmcore.c @@ -104,9 +104,9 @@ static int pfn_is_ram(unsigned long pfn) } /* Reads a page from the oldmem device from given offset. */ -static ssize_t read_from_oldmem(char *buf, size_t count, - u64 *ppos, int userbuf, - bool encrypted) +ssize_t read_from_oldmem(char *buf, size_t count, + u64 *ppos, int userbuf, + bool encrypted) { unsigned long pfn, offset; size_t nr_bytes; @@ -170,7 +170,7 @@ void __weak elfcorehdr_free(unsigned long long addr) */ ssize_t __weak elfcorehdr_read(char *buf, size_t count, u64 *ppos) { - return read_from_oldmem(buf, count, ppos, 0, sev_active()); + return read_from_oldmem(buf, count, ppos, 0, false); } /* |