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| author | Peter Zijlstra <peterz@infradead.org> | 2018-12-03 18:03:46 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-12-17 18:54:23 +0100 |
| commit | 16ebf031e8ab73779a382c9f2b097891da6af923 (patch) | |
| tree | 9320edf801261c9c25343981eabd041a779d848c /arch/x86/mm | |
| parent | x86/mm/cpa: Add ARRAY and PAGES_ARRAY selftests (diff) | |
| download | linux-16ebf031e8ab73779a382c9f2b097891da6af923.tar.xz linux-16ebf031e8ab73779a382c9f2b097891da6af923.zip | |
x86/mm/cpa: Add __cpa_addr() helper
The code to compute the virtual address of a cpa_data is duplicated;
introduce a helper before more copies happen.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tom.StDenis@amd.com
Cc: dave.hansen@intel.com
Link: http://lkml.kernel.org/r/20181203171043.229119497@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/mm')
| -rw-r--r-- | arch/x86/mm/pageattr.c | 38 |
1 files changed, 19 insertions, 19 deletions
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c index a1bcde35db4c..6e6900ebea30 100644 --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -228,6 +228,23 @@ static bool __cpa_pfn_in_highmap(unsigned long pfn) #endif +static unsigned long __cpa_addr(struct cpa_data *cpa, int idx) +{ + if (cpa->flags & CPA_PAGES_ARRAY) { + struct page *page = cpa->pages[idx]; + + if (unlikely(PageHighMem(page))) + return 0; + + return (unsigned long)page_address(page); + } + + if (cpa->flags & CPA_ARRAY) + return cpa->vaddr[idx]; + + return *cpa->vaddr; +} + /* * Flushing functions */ @@ -1476,15 +1493,7 @@ static int __change_page_attr(struct cpa_data *cpa, int primary) unsigned int level; pte_t *kpte, old_pte; - if (cpa->flags & CPA_PAGES_ARRAY) { - struct page *page = cpa->pages[cpa->curpage]; - if (unlikely(PageHighMem(page))) - return 0; - address = (unsigned long)page_address(page); - } else if (cpa->flags & CPA_ARRAY) - address = cpa->vaddr[cpa->curpage]; - else - address = *cpa->vaddr; + address = __cpa_addr(cpa, cpa->curpage); repeat: kpte = _lookup_address_cpa(cpa, address, &level); if (!kpte) @@ -1565,16 +1574,7 @@ static int cpa_process_alias(struct cpa_data *cpa) * No need to redo, when the primary call touched the direct * mapping already: */ - if (cpa->flags & CPA_PAGES_ARRAY) { - struct page *page = cpa->pages[cpa->curpage]; - if (unlikely(PageHighMem(page))) - return 0; - vaddr = (unsigned long)page_address(page); - } else if (cpa->flags & CPA_ARRAY) - vaddr = cpa->vaddr[cpa->curpage]; - else - vaddr = *cpa->vaddr; - + vaddr = __cpa_addr(cpa, cpa->curpage); if (!(within(vaddr, PAGE_OFFSET, PAGE_OFFSET + (max_pfn_mapped << PAGE_SHIFT)))) { |