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authorPaolo Bonzini <pbonzini@redhat.com>2017-02-20 11:54:22 +0100
committerPaolo Bonzini <pbonzini@redhat.com>2017-02-20 11:54:22 +0100
commita26d553400b30b6e0389f5c723c0fc6f7ea473da (patch)
treed158102d9c7b9cc966092521d5a2560967aa9ecb /arch/powerpc
parent843574a3ede1d4d3f3c88317a50d5c76d5a9515c (diff)
parentbcd3bb63dbc87a3bbb21e95a09cd26bb6479c332 (diff)
Merge branch 'kvm-ppc-next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into HEAD
Paul Mackerras writes: "Please do a pull from my kvm-ppc-next branch to get some fixes which I would like to have in 4.11. There are four small commits there; two are fixes for potential host crashes in the new HPT resizing code, and the other two are changes to printks to make KVM on PPC a little less noisy."
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/kvm/book3s_32_mmu.c3
-rw-r--r--arch/powerpc/kvm/book3s_64_mmu.c3
-rw-r--r--arch/powerpc/kvm/book3s_64_mmu_hv.c13
-rw-r--r--arch/powerpc/kvm/powerpc.c3
4 files changed, 17 insertions, 5 deletions
diff --git a/arch/powerpc/kvm/book3s_32_mmu.c b/arch/powerpc/kvm/book3s_32_mmu.c
index a2eb6d354a57..1992676c7a94 100644
--- a/arch/powerpc/kvm/book3s_32_mmu.c
+++ b/arch/powerpc/kvm/book3s_32_mmu.c
@@ -224,7 +224,8 @@ static int kvmppc_mmu_book3s_32_xlate_pte(struct kvm_vcpu *vcpu, gva_t eaddr,
ptem = kvmppc_mmu_book3s_32_get_ptem(sre, eaddr, primary);
if(copy_from_user(pteg, (void __user *)ptegp, sizeof(pteg))) {
- printk(KERN_ERR "KVM: Can't copy data from 0x%lx!\n", ptegp);
+ printk_ratelimited(KERN_ERR
+ "KVM: Can't copy data from 0x%lx!\n", ptegp);
goto no_page_found;
}
diff --git a/arch/powerpc/kvm/book3s_64_mmu.c b/arch/powerpc/kvm/book3s_64_mmu.c
index b9131aa1aedf..70153578131a 100644
--- a/arch/powerpc/kvm/book3s_64_mmu.c
+++ b/arch/powerpc/kvm/book3s_64_mmu.c
@@ -265,7 +265,8 @@ do_second:
goto no_page_found;
if(copy_from_user(pteg, (void __user *)ptegp, sizeof(pteg))) {
- printk(KERN_ERR "KVM can't copy data from 0x%lx!\n", ptegp);
+ printk_ratelimited(KERN_ERR
+ "KVM: Can't copy data from 0x%lx!\n", ptegp);
goto no_page_found;
}
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index 013552f05182..f3158fb16de3 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c
@@ -127,8 +127,8 @@ void kvmppc_set_hpt(struct kvm *kvm, struct kvm_hpt_info *info)
kvm->arch.hpt = *info;
kvm->arch.sdr1 = __pa(info->virt) | (info->order - 18);
- pr_info("KVM guest htab at %lx (order %ld), LPID %x\n",
- info->virt, (long)info->order, kvm->arch.lpid);
+ pr_debug("KVM guest htab at %lx (order %ld), LPID %x\n",
+ info->virt, (long)info->order, kvm->arch.lpid);
}
long kvmppc_alloc_reset_hpt(struct kvm *kvm, int order)
@@ -1370,6 +1370,12 @@ static int resize_hpt_rehash(struct kvm_resize_hpt *resize)
unsigned long i;
int rc;
+ /*
+ * resize_hpt_rehash_hpte() doesn't handle the new-format HPTEs
+ * that POWER9 uses, and could well hit a BUG_ON on POWER9.
+ */
+ if (cpu_has_feature(CPU_FTR_ARCH_300))
+ return -EIO;
for (i = 0; i < kvmppc_hpt_npte(&kvm->arch.hpt); i++) {
rc = resize_hpt_rehash_hpte(resize, i);
if (rc != 0)
@@ -1407,6 +1413,9 @@ static void resize_hpt_release(struct kvm *kvm, struct kvm_resize_hpt *resize)
{
BUG_ON(kvm->arch.resize_hpt != resize);
+ if (!resize)
+ return;
+
if (resize->hpt.virt)
kvmppc_free_hpt(&resize->hpt);
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 1fe1391ba2c2..2b38d824e9e5 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -614,7 +614,8 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
r = 1;
break;
case KVM_CAP_SPAPR_RESIZE_HPT:
- r = !!hv_enabled;
+ /* Disable this on POWER9 until code handles new HPTE format */
+ r = !!hv_enabled && !cpu_has_feature(CPU_FTR_ARCH_300);
break;
#endif
case KVM_CAP_PPC_HTM: