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x86: Add NMI types for kmap_atomic

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Two new kmap_atomic slots for NMI context. And teach pte_offset_map()
about NMI context.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
CC: Nick Piggin <npiggin@suse.de>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2009-06-15 12:40:41 +02:00 committed by Ingo Molnar
parent 465a454f25
commit 3ff0141aa3
2 changed files with 6 additions and 3 deletions
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4
arch/x86/include/asm/kmap_types.h
View File

@ -21,7 +21,9 @@ D(9) KM_IRQ0,
D(10) KM_IRQ1,
D(11) KM_SOFTIRQ0,
D(12) KM_SOFTIRQ1,
D(13) KM_TYPE_NR
D(13) KM_NMI,
D(14) KM_NMI_PTE,
D(15) KM_TYPE_NR
};
#undef D

5
arch/x86/include/asm/pgtable_32.h
View File

@ -49,13 +49,14 @@ extern void set_pmd_pfn(unsigned long, unsigned long, pgprot_t);
#endif
#if defined(CONFIG_HIGHPTE)
#define __KM_PTE (in_nmi() ? KM_NMI_PTE : KM_PTE0)
#define pte_offset_map(dir, address) \
((pte_t *)kmap_atomic_pte(pmd_page(*(dir)), KM_PTE0) + \
((pte_t *)kmap_atomic_pte(pmd_page(*(dir)), __KM_PTE) + \
pte_index((address)))
#define pte_offset_map_nested(dir, address) \
((pte_t *)kmap_atomic_pte(pmd_page(*(dir)), KM_PTE1) + \
pte_index((address)))
#define pte_unmap(pte) kunmap_atomic((pte), KM_PTE0)
#define pte_unmap(pte) kunmap_atomic((pte), __KM_PTE)
#define pte_unmap_nested(pte) kunmap_atomic((pte), KM_PTE1)
#else
#define pte_offset_map(dir, address) \