summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/kvm/Kconfig
diff options
context:
space:
mode:
authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2013-07-02 11:15:16 +0530
committerAlexander Graf <agraf@suse.de>2013-07-08 16:19:58 +0200
commitfa61a4e376d2129690c82dfb05b31705a67d6e0b (patch)
tree549f4aaad63f0b18e60e059681144256a8cb2be7 /arch/powerpc/kvm/Kconfig
parentf35320288c5306ddbcb5ecac046b73519837299c (diff)
downloadlinux-fa61a4e376d2129690c82dfb05b31705a67d6e0b.tar.bz2
powerpc/kvm: Contiguous memory allocator based hash page table allocation
Powerpc architecture uses a hash based page table mechanism for mapping virtual addresses to physical address. The architecture require this hash page table to be physically contiguous. With KVM on Powerpc currently we use early reservation mechanism for allocating guest hash page table. This implies that we need to reserve a big memory region to ensure we can create large number of guest simultaneously with KVM on Power. Another disadvantage is that the reserved memory is not available to rest of the subsystems and and that implies we limit the total available memory in the host. This patch series switch the guest hash page table allocation to use contiguous memory allocator. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kvm/Kconfig')
-rw-r--r--arch/powerpc/kvm/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig
index eb643f862579..ffaef2cb101a 100644
--- a/arch/powerpc/kvm/Kconfig
+++ b/arch/powerpc/kvm/Kconfig
@@ -72,6 +72,7 @@ config KVM_BOOK3S_64_HV
bool "KVM support for POWER7 and PPC970 using hypervisor mode in host"
depends on KVM_BOOK3S_64
select MMU_NOTIFIER
+ select CMA
---help---
Support running unmodified book3s_64 guest kernels in
virtual machines on POWER7 and PPC970 processors that have