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| author | Konstantin Weitz <konstantin.weitz@gmail.com> | 2013-04-17 17:36:29 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-02-21 08:50:19 +0100 |
| commit | b31288fa83b2bcc8834e1e208e9526b8bd5ce361 (patch) | |
| tree | 97b2372c7eeb7d7e792042e91f6489900aa38dfc /arch/s390/kvm/kvm-s390.h | |
| parent | mm: add support for discard of unused ptes (diff) | |
| download | linux-b31288fa83b2bcc8834e1e208e9526b8bd5ce361.tar.xz linux-b31288fa83b2bcc8834e1e208e9526b8bd5ce361.zip | |
s390/kvm: support collaborative memory management
This patch enables Collaborative Memory Management (CMM) for kvm
on s390. CMM allows the guest to inform the host about page usage
(see arch/s390/mm/cmm.c). The host uses this information to avoid
swapping in unused pages in the page fault handler. Further, a CPU
provided list of unused invalid pages is processed to reclaim swap
space of not yet accessed unused pages.
[ Martin Schwidefsky: patch reordering and cleanup ]
Signed-off-by: Konstantin Weitz <konstantin.weitz@gmail.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kvm/kvm-s390.h')
| -rw-r--r-- | arch/s390/kvm/kvm-s390.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h index f9559b0bd620..564514f410f4 100644 --- a/arch/s390/kvm/kvm-s390.h +++ b/arch/s390/kvm/kvm-s390.h @@ -156,6 +156,8 @@ void s390_vcpu_block(struct kvm_vcpu *vcpu); void s390_vcpu_unblock(struct kvm_vcpu *vcpu); void exit_sie(struct kvm_vcpu *vcpu); void exit_sie_sync(struct kvm_vcpu *vcpu); +/* are we going to support cmma? */ +bool kvm_enabled_cmma(void); /* implemented in diag.c */ int kvm_s390_handle_diag(struct kvm_vcpu *vcpu); |