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authorPaul Mackerras <paulus@ozlabs.org>2017-01-30 13:21:41 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2017-01-31 11:11:47 +0300
commitc92701322711682de89b2bd0f32affad040b6e86 (patch)
tree12bfd6dd11550ed8e85b40ef6a2847eff51109b5 /arch/powerpc/include/asm/kvm_ppc.h
parentbc3551257af837fc603d295e59f9e32953525b98 (diff)
downloadlinux-c92701322711682de89b2bd0f32affad040b6e86.tar.xz
KVM: PPC: Book3S HV: Add userspace interfaces for POWER9 MMU
This adds two capabilities and two ioctls to allow userspace to find out about and configure the POWER9 MMU in a guest. The two capabilities tell userspace whether KVM can support a guest using the radix MMU, or using the hashed page table (HPT) MMU with a process table and segment tables. (Note that the MMUs in the POWER9 processor cores do not use the process and segment tables when in HPT mode, but the nest MMU does). The KVM_PPC_CONFIGURE_V3_MMU ioctl allows userspace to specify whether a guest will use the radix MMU or the HPT MMU, and to specify the size and location (in guest space) of the process table. The KVM_PPC_GET_RMMU_INFO ioctl gives userspace information about the radix MMU. It returns a list of supported radix tree geometries (base page size and number of bits indexed at each level of the radix tree) and the encoding used to specify the various page sizes for the TLB invalidate entry instruction. Initially, both capabilities return 0 and the ioctls return -EINVAL, until the necessary infrastructure for them to operate correctly is added. Signed-off-by: Paul Mackerras <paulus@ozlabs.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/kvm_ppc.h')
-rw-r--r--arch/powerpc/include/asm/kvm_ppc.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h
index 2da67bf1f2ec..48c760f89590 100644
--- a/arch/powerpc/include/asm/kvm_ppc.h
+++ b/arch/powerpc/include/asm/kvm_ppc.h
@@ -291,6 +291,8 @@ struct kvmppc_ops {
struct irq_bypass_producer *);
void (*irq_bypass_del_producer)(struct irq_bypass_consumer *,
struct irq_bypass_producer *);
+ int (*configure_mmu)(struct kvm *kvm, struct kvm_ppc_mmuv3_cfg *cfg);
+ int (*get_rmmu_info)(struct kvm *kvm, struct kvm_ppc_rmmu_info *info);
};
extern struct kvmppc_ops *kvmppc_hv_ops;