aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc
diff options
context:
space:
mode:
authorScott Wood <scottwood@freescale.com>2013-06-06 19:16:31 -0500
committerGleb Natapov <gleb@redhat.com>2013-06-11 11:10:59 +0300
commitf1e89028f020ca982bf51be6eaba0d462ba0f7fa (patch)
treeb6d06ea63e61d1f93037f1f9ff76fe19358dfd52 /arch/powerpc
parent2b6398fcf2831f52a8ad9f01c123b3ce2ea31277 (diff)
downloadvexpress-lsk-f1e89028f020ca982bf51be6eaba0d462ba0f7fa.tar.gz
kvm/ppc/booke: Hold srcu lock when calling gfn functions
KVM core expects arch code to acquire the srcu lock when calling gfn_to_memslot and similar functions. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Gleb Natapov <gleb@redhat.com>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/kvm/44x_tlb.c5
-rw-r--r--arch/powerpc/kvm/booke.c7
-rw-r--r--arch/powerpc/kvm/e500_mmu.c5
3 files changed, 17 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/44x_tlb.c b/arch/powerpc/kvm/44x_tlb.c
index 5dd3ab46997..ed038544814 100644
--- a/arch/powerpc/kvm/44x_tlb.c
+++ b/arch/powerpc/kvm/44x_tlb.c
@@ -441,6 +441,7 @@ int kvmppc_44x_emul_tlbwe(struct kvm_vcpu *vcpu, u8 ra, u8 rs, u8 ws)
struct kvmppc_vcpu_44x *vcpu_44x = to_44x(vcpu);
struct kvmppc_44x_tlbe *tlbe;
unsigned int gtlb_index;
+ int idx;
gtlb_index = kvmppc_get_gpr(vcpu, ra);
if (gtlb_index >= KVM44x_GUEST_TLB_SIZE) {
@@ -473,6 +474,8 @@ int kvmppc_44x_emul_tlbwe(struct kvm_vcpu *vcpu, u8 ra, u8 rs, u8 ws)
return EMULATE_FAIL;
}
+ idx = srcu_read_lock(&vcpu->kvm->srcu);
+
if (tlbe_is_host_safe(vcpu, tlbe)) {
gva_t eaddr;
gpa_t gpaddr;
@@ -489,6 +492,8 @@ int kvmppc_44x_emul_tlbwe(struct kvm_vcpu *vcpu, u8 ra, u8 rs, u8 ws)
kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
}
+ srcu_read_unlock(&vcpu->kvm->srcu, idx);
+
trace_kvm_gtlb_write(gtlb_index, tlbe->tid, tlbe->word0, tlbe->word1,
tlbe->word2);
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index 1020119226d..ecbe9081c9c 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -832,6 +832,7 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
{
int r = RESUME_HOST;
int s;
+ int idx;
/* update before a new last_exit_type is rewritten */
kvmppc_update_timing_stats(vcpu);
@@ -1053,6 +1054,8 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
break;
}
+ idx = srcu_read_lock(&vcpu->kvm->srcu);
+
gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
gfn = gpaddr >> PAGE_SHIFT;
@@ -1075,6 +1078,7 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
kvmppc_account_exit(vcpu, MMIO_EXITS);
}
+ srcu_read_unlock(&vcpu->kvm->srcu, idx);
break;
}
@@ -1098,6 +1102,8 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
+ idx = srcu_read_lock(&vcpu->kvm->srcu);
+
gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
gfn = gpaddr >> PAGE_SHIFT;
@@ -1114,6 +1120,7 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
}
+ srcu_read_unlock(&vcpu->kvm->srcu, idx);
break;
}
diff --git a/arch/powerpc/kvm/e500_mmu.c b/arch/powerpc/kvm/e500_mmu.c
index c41a5a96b55..6d6f153b6c1 100644
--- a/arch/powerpc/kvm/e500_mmu.c
+++ b/arch/powerpc/kvm/e500_mmu.c
@@ -396,6 +396,7 @@ int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu)
struct kvm_book3e_206_tlb_entry *gtlbe;
int tlbsel, esel;
int recal = 0;
+ int idx;
tlbsel = get_tlb_tlbsel(vcpu);
esel = get_tlb_esel(vcpu, tlbsel);
@@ -430,6 +431,8 @@ int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu)
kvmppc_set_tlb1map_range(vcpu, gtlbe);
}
+ idx = srcu_read_lock(&vcpu->kvm->srcu);
+
/* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */
if (tlbe_is_host_safe(vcpu, gtlbe)) {
u64 eaddr = get_tlb_eaddr(gtlbe);
@@ -444,6 +447,8 @@ int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu)
kvmppc_mmu_map(vcpu, eaddr, raddr, index_of(tlbsel, esel));
}
+ srcu_read_unlock(&vcpu->kvm->srcu, idx);
+
kvmppc_set_exit_type(vcpu, EMULATED_TLBWE_EXITS);
return EMULATE_DONE;
}