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KVM: PPC: e500: don't translate gfn to pfn with preemption disabled

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Delay allocation of the shadow pid until we're ready to disable
preemption and write the entry.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Scott Wood 2011-08-18 15:25:14 -05:00 committed by Avi Kivity
parent 59674c1a6a
commit 3bf3cdcc14
1 changed files with 23 additions and 13 deletions
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36
arch/powerpc/kvm/e500_tlb.c
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@ -507,21 +507,16 @@ static inline void kvmppc_e500_deliver_tlb_miss(struct kvm_vcpu *vcpu,
vcpu_e500->mas7 = 0;
}
/* TID must be supplied by the caller */
static inline void kvmppc_e500_setup_stlbe(struct kvmppc_vcpu_e500 *vcpu_e500,
struct tlbe *gtlbe, int tsize,
struct tlbe_priv *priv,
u64 gvaddr, struct tlbe *stlbe)
{
pfn_t pfn = priv->pfn;
unsigned int stid;
stid = kvmppc_e500_get_sid(vcpu_e500, get_tlb_ts(gtlbe),
get_tlb_tid(gtlbe),
get_cur_pr(&vcpu_e500->vcpu), 0);
/* Force TS=1 IPROT=0 for all guest mappings. */
stlbe->mas1 = MAS1_TSIZE(tsize)
| MAS1_TID(stid) | MAS1_TS | MAS1_VALID;
stlbe->mas1 = MAS1_TSIZE(tsize) | MAS1_TS | MAS1_VALID;
stlbe->mas2 = (gvaddr & MAS2_EPN)
| e500_shadow_mas2_attrib(gtlbe->mas2,
vcpu_e500->vcpu.arch.shared->msr & MSR_PR);
@ -816,6 +811,24 @@ int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, int rb)
return EMULATE_DONE;
}
/* sesel is index into the set, not the whole array */
static void write_stlbe(struct kvmppc_vcpu_e500 *vcpu_e500,
struct tlbe *gtlbe,
struct tlbe *stlbe,
int stlbsel, int sesel)
{
int stid;
preempt_disable();
stid = kvmppc_e500_get_sid(vcpu_e500, get_tlb_ts(gtlbe),
get_tlb_tid(gtlbe),
get_cur_pr(&vcpu_e500->vcpu), 0);
stlbe->mas1 |= MAS1_TID(stid);
write_host_tlbe(vcpu_e500, stlbsel, sesel, stlbe);
preempt_enable();
}
int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu)
{
struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
@ -845,7 +858,6 @@ int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu)
u64 eaddr;
u64 raddr;
preempt_disable();
switch (tlbsel) {
case 0:
/* TLB0 */
@ -874,8 +886,8 @@ int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu)
default:
BUG();
}
write_host_tlbe(vcpu_e500, stlbsel, sesel, &stlbe);
preempt_enable();
write_stlbe(vcpu_e500, gtlbe, &stlbe, stlbsel, sesel);
}
kvmppc_set_exit_type(vcpu, EMULATED_TLBWE_EXITS);
@ -937,7 +949,6 @@ void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr,
gtlbe = &vcpu_e500->gtlb_arch[tlbsel][esel];
preempt_disable();
switch (tlbsel) {
case 0:
stlbsel = 0;
@ -962,8 +973,7 @@ void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr,
break;
}
write_host_tlbe(vcpu_e500, stlbsel, sesel, &stlbe);
preempt_enable();
write_stlbe(vcpu_e500, gtlbe, &stlbe, stlbsel, sesel);
}
int kvmppc_e500_tlb_search(struct kvm_vcpu *vcpu,