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| author | Liu Yu <yu.liu@freescale.com> | 2011-06-14 18:35:14 -0500 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-07-12 13:16:39 +0300 |
| commit | dd9ebf1f94354b010f2ac7a98bf69168636cb08e (patch) | |
| tree | d7a6cbe2b31cd7349913d289b715fa1086ba0a1a /arch/powerpc/kvm/e500_tlb.h | |
| parent | 08b7fa92b9250eab0f493f7721977e781a887b3d (diff) | |
| download | blackbird-op-linux-dd9ebf1f94354b010f2ac7a98bf69168636cb08e.tar.gz blackbird-op-linux-dd9ebf1f94354b010f2ac7a98bf69168636cb08e.zip | |
KVM: PPC: e500: Add shadow PID support
Dynamically assign host PIDs to guest PIDs, splitting each guest PID into
multiple host (shadow) PIDs based on kernel/user and MSR[IS/DS]. Use
both PID0 and PID1 so that the shadow PIDs for the right mode can be
selected, that correspond both to guest TID = zero and guest TID = guest
PID.
This allows us to significantly reduce the frequency of needing to
invalidate the entire TLB. When the guest mode or PID changes, we just
update the host PID0/PID1. And since the allocation of shadow PIDs is
global, multiple guests can share the TLB without conflict.
Note that KVM does not yet support the guest setting PID1 or PID2 to
a value other than zero. This will need to be fixed for nested KVM
to work. Until then, we enforce the requirement for guest PID1/PID2
to stay zero by failing the emulation if the guest tries to set them
to something else.
Signed-off-by: Liu Yu <yu.liu@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kvm/e500_tlb.h')
| -rw-r--r-- | arch/powerpc/kvm/e500_tlb.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/e500_tlb.h b/arch/powerpc/kvm/e500_tlb.h index 458946b4775d..59b88e99a235 100644 --- a/arch/powerpc/kvm/e500_tlb.h +++ b/arch/powerpc/kvm/e500_tlb.h @@ -1,5 +1,5 @@ /* - * Copyright (C) 2008 Freescale Semiconductor, Inc. All rights reserved. + * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved. * * Author: Yu Liu, yu.liu@freescale.com * @@ -55,6 +55,7 @@ extern void kvmppc_e500_tlb_load(struct kvm_vcpu *, int); extern int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *); extern void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *); extern void kvmppc_e500_tlb_setup(struct kvmppc_vcpu_e500 *); +extern void kvmppc_e500_recalc_shadow_pid(struct kvmppc_vcpu_e500 *); /* TLB helper functions */ static inline unsigned int get_tlb_size(const struct tlbe *tlbe) @@ -110,6 +111,16 @@ static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu) return vcpu->arch.pid & 0xff; } +static inline unsigned int get_cur_as(struct kvm_vcpu *vcpu) +{ + return !!(vcpu->arch.shared->msr & (MSR_IS | MSR_DS)); +} + +static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu) +{ + return !!(vcpu->arch.shared->msr & MSR_PR); +} + static inline unsigned int get_cur_spid( const struct kvmppc_vcpu_e500 *vcpu_e500) { |
