Messages in this thread Patch in this message | | | From | Haozhong Zhang <> | Subject | [PATCH v2 1/2] x86/mm: expose lookup_memtype() | Date | Tue, 31 Oct 2017 19:48:39 +0800 |
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KVM MMU will use it to get the cache mode of the host page.
Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com> --- arch/x86/include/asm/pat.h | 2 ++ arch/x86/mm/pat.c | 3 ++- 2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/pat.h b/arch/x86/include/asm/pat.h index fffb2794dd89..990d955972b8 100644 --- a/arch/x86/include/asm/pat.h +++ b/arch/x86/include/asm/pat.h @@ -21,4 +21,6 @@ int io_reserve_memtype(resource_size_t start, resource_size_t end, void io_free_memtype(resource_size_t start, resource_size_t end); +enum page_cache_mode lookup_memtype(u64 paddr); + #endif /* _ASM_X86_PAT_H */ diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c index fe7d57a8fb60..e85987aaf5d5 100644 --- a/arch/x86/mm/pat.c +++ b/arch/x86/mm/pat.c @@ -650,7 +650,7 @@ int free_memtype(u64 start, u64 end) * Returns _PAGE_CACHE_MODE_WB, _PAGE_CACHE_MODE_WC, _PAGE_CACHE_MODE_UC_MINUS * or _PAGE_CACHE_MODE_WT. */ -static enum page_cache_mode lookup_memtype(u64 paddr) +enum page_cache_mode lookup_memtype(u64 paddr) { enum page_cache_mode rettype = _PAGE_CACHE_MODE_WB; struct memtype *entry; @@ -676,6 +676,7 @@ static enum page_cache_mode lookup_memtype(u64 paddr) spin_unlock(&memtype_lock); return rettype; } +EXPORT_SYMBOL_GPL(lookup_memtype); /** * io_reserve_memtype - Request a memory type mapping for a region of memory -- 2.14.1
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