From ae7eb82a92fae4d255a0caa9f7c0f99e3babfec1 Mon Sep 17 00:00:00 2001 From: Thiago Jung Bauermann Date: Tue, 6 Aug 2019 01:49:18 -0300 Subject: 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 Reviewed-by: Christoph Hellwig Reviewed-by: Lianbo Jiang Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190806044919.10622-6-bauerman@linux.ibm.com --- include/linux/crash_dump.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'include/linux/crash_dump.h') diff --git a/include/linux/crash_dump.h b/include/linux/crash_dump.h index f774c5eb9e3c..4664fc1871de 100644 --- a/include/linux/crash_dump.h +++ b/include/linux/crash_dump.h @@ -115,4 +115,18 @@ static inline int vmcore_add_device_dump(struct vmcoredd_data *data) return -EOPNOTSUPP; } #endif /* CONFIG_PROC_VMCORE_DEVICE_DUMP */ + +#ifdef CONFIG_PROC_VMCORE +ssize_t read_from_oldmem(char *buf, size_t count, + u64 *ppos, int userbuf, + bool encrypted); +#else +static inline ssize_t read_from_oldmem(char *buf, size_t count, + u64 *ppos, int userbuf, + bool encrypted) +{ + return -EOPNOTSUPP; +} +#endif /* CONFIG_PROC_VMCORE */ + #endif /* LINUX_CRASHDUMP_H */ -- cgit v1.2.3