summaryrefslogtreecommitdiff
path: root/arch/powerpc/include/uapi
diff options
context:
space:
mode:
authorPaul Mackerras <paulus@samba.org>2013-09-20 08:52:38 +0400
committerAlexander Graf <agraf@suse.de>2013-10-17 16:45:01 +0400
commita0144e2a6b0b4a137a32f0102354782547bf0935 (patch)
treeafc87f1baa02328aaf7a66209ad1d96aef4e533c /arch/powerpc/include/uapi
parent8b75cbbe647603f2b3c17ead35ee3cefa88397e7 (diff)
downloadlinux-a0144e2a6b0b4a137a32f0102354782547bf0935.tar.xz
KVM: PPC: Book3S HV: Store LPCR value for each virtual core
This adds the ability to have a separate LPCR (Logical Partitioning Control Register) value relating to a guest for each virtual core, rather than only having a single value for the whole VM. This corresponds to what real POWER hardware does, where there is a LPCR per CPU thread but most of the fields are required to have the same value on all active threads in a core. The per-virtual-core LPCR can be read and written using the GET/SET_ONE_REG interface. Userspace can can only modify the following fields of the LPCR value: DPFD Default prefetch depth ILE Interrupt little-endian TC Translation control (secondary HPT hash group search disable) We still maintain a per-VM default LPCR value in kvm->arch.lpcr, which contains bits relating to memory management, i.e. the Virtualized Partition Memory (VPM) bits and the bits relating to guest real mode. When this default value is updated, the update needs to be propagated to the per-vcore values, so we add a kvmppc_update_lpcr() helper to do that. Signed-off-by: Paul Mackerras <paulus@samba.org> [agraf: fix whitespace] Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/include/uapi')
-rw-r--r--arch/powerpc/include/uapi/asm/kvm.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h
index b98bf3f50527..e42127d1ae8e 100644
--- a/arch/powerpc/include/uapi/asm/kvm.h
+++ b/arch/powerpc/include/uapi/asm/kvm.h
@@ -533,6 +533,7 @@ struct kvm_get_htab_header {
#define KVM_REG_PPC_ACOP (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xb3)
#define KVM_REG_PPC_VRSAVE (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xb4)
+#define KVM_REG_PPC_LPCR (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xb5)
/* Transactional Memory checkpointed state:
* This is all GPRs, all VSX regs and a subset of SPRs