b3fdf9398a
Relocate the twin mce functions to arch/x86/mm/pat/set_memory.c
file where they belong.
While at it, fixup a function name in a comment.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jane Chu <jane.chu@oracle.com>
Acked-by: Borislav Petkov <bp@suse.de>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
[sfr: gate {set,clear}_mce_nospec() by CONFIG_X86_64]
Link: https://lore.kernel.org/r/165272527328.90175.8336008202048685278.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright 2017, Michael Ellerman, IBM Corporation.
|
|
*/
|
|
#ifndef _LINUX_SET_MEMORY_H_
|
|
#define _LINUX_SET_MEMORY_H_
|
|
|
|
#ifdef CONFIG_ARCH_HAS_SET_MEMORY
|
|
#include <asm/set_memory.h>
|
|
#else
|
|
static inline int set_memory_ro(unsigned long addr, int numpages) { return 0; }
|
|
static inline int set_memory_rw(unsigned long addr, int numpages) { return 0; }
|
|
static inline int set_memory_x(unsigned long addr, int numpages) { return 0; }
|
|
static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; }
|
|
#endif
|
|
|
|
#ifndef CONFIG_ARCH_HAS_SET_DIRECT_MAP
|
|
static inline int set_direct_map_invalid_noflush(struct page *page)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int set_direct_map_default_noflush(struct page *page)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline bool kernel_page_present(struct page *page)
|
|
{
|
|
return true;
|
|
}
|
|
#else /* CONFIG_ARCH_HAS_SET_DIRECT_MAP */
|
|
/*
|
|
* Some architectures, e.g. ARM64 can disable direct map modifications at
|
|
* boot time. Let them overrive this query.
|
|
*/
|
|
#ifndef can_set_direct_map
|
|
static inline bool can_set_direct_map(void)
|
|
{
|
|
return true;
|
|
}
|
|
#define can_set_direct_map can_set_direct_map
|
|
#endif
|
|
#endif /* CONFIG_ARCH_HAS_SET_DIRECT_MAP */
|
|
|
|
#ifdef CONFIG_X86_64
|
|
int set_mce_nospec(unsigned long pfn, bool unmap);
|
|
int clear_mce_nospec(unsigned long pfn);
|
|
#else
|
|
static inline int set_mce_nospec(unsigned long pfn, bool unmap)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int clear_mce_nospec(unsigned long pfn)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifndef CONFIG_ARCH_HAS_MEM_ENCRYPT
|
|
static inline int set_memory_encrypted(unsigned long addr, int numpages)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int set_memory_decrypted(unsigned long addr, int numpages)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_ARCH_HAS_MEM_ENCRYPT */
|
|
|
|
#endif /* _LINUX_SET_MEMORY_H_ */
|