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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-07-26 15:04:02 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2013-07-29 09:03:09 +0200 |
| commit | 3eabaee998c787e7e1565574821652548f7fc003 (patch) | |
| tree | 8e36fdfda46ec4c0a5b2a419a39fa2f5c1ba0f8e /arch/s390/include/asm/pgtable.h | |
| parent | KVM: x86: handle singlestep during emulation (diff) | |
| download | linux-3eabaee998c787e7e1565574821652548f7fc003.tar.xz linux-3eabaee998c787e7e1565574821652548f7fc003.zip | |
KVM: s390: allow sie enablement for multi-threaded programs
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>
Diffstat (limited to 'arch/s390/include/asm/pgtable.h')
| -rw-r--r-- | arch/s390/include/asm/pgtable.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 75fb726de91f..7a60bb93e83c 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -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 |