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KVM: s390: allow sie enablement for multi-threaded programs

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Improve the code to upgrade the standard 2K page tables to 4K page tables
with PGSTEs to allow the operation to happen when the program is already
multi-threaded.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Martin Schwidefsky
2013-07-26 15:04:02 +02:00
committed by Paolo Bonzini
parent 663f4c61b8
commit 3eabaee998
4 changed files with 129 additions and 84 deletions
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11
arch/s390/include/asm/pgtable.h
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@@ -1361,6 +1361,17 @@ static inline pmd_t pmd_mkwrite(pmd_t pmd)
}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE || CONFIG_HUGETLB_PAGE */
static inline void pmdp_flush_lazy(struct mm_struct *mm,
unsigned long address, pmd_t *pmdp)
{
int active = (mm == current->active_mm) ? 1 : 0;
if ((atomic_read(&mm->context.attach_count) & 0xffff) > active)
__pmd_idte(address, pmdp);
else
mm->context.flush_mm = 1;
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
#define __HAVE_ARCH_PGTABLE_DEPOSIT