On Tue, 2007-07-24 at 15:19 +0300, Avi Kivity wrote:
> They don't rhyme anyway.
Let's NOT start that here.
Is this patch now clear? It's less ambitious I fear.
Cheer,
Rusty.
===
Add and use pr_unimpl for standard formatting of unimplemented features.
All guest-invokable printks should be ratelimited to prevent malicious
guests from flooding logs. This is a start.
Signed-off-by: Rusty Russell <[EMAIL PROTECTED]>
diff -r 5266830ac99d drivers/kvm/kvm.h
--- a/drivers/kvm/kvm.h Tue Jul 24 16:22:15 2007 +1000
+++ b/drivers/kvm/kvm.h Wed Jul 25 09:52:33 2007 +1000
@@ -503,6 +503,14 @@ struct kvm_arch_ops {
extern struct kvm_arch_ops *kvm_arch_ops;
+/* The guest did something we don't support. */
+#define pr_unimpl(vcpu, fmt, ...) \
+ do { \
+ if (printk_ratelimit()) \
+ printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
+ current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
+ } while(0)
+
#define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
#define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
diff -r 5266830ac99d drivers/kvm/kvm_main.c
--- a/drivers/kvm/kvm_main.c Tue Jul 24 16:22:15 2007 +1000
+++ b/drivers/kvm/kvm_main.c Wed Jul 25 09:55:26 2007 +1000
@@ -1001,8 +1001,8 @@ static int emulator_write_std(unsigned l
unsigned int bytes,
struct x86_emulate_ctxt *ctxt)
{
- printk(KERN_ERR "emulator_write_std: addr %lx n %d\n",
- addr, bytes);
+ pr_unimpl(ctxt->vcpu, "emulator_write_std: addr %lx n %d\n",
+ addr, bytes);
return X86EMUL_UNHANDLEABLE;
}
@@ -1529,7 +1529,7 @@ int kvm_get_msr_common(struct kvm_vcpu *
break;
#endif
default:
- printk(KERN_ERR "kvm: unhandled rdmsr: 0x%x\n", msr);
+ pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
return 1;
}
*pdata = data;
@@ -1608,7 +1608,7 @@ int kvm_set_msr_common(struct kvm_vcpu *
return vcpu_register_para(vcpu, data);
default:
- printk(KERN_ERR "kvm: unhandled wrmsr: 0x%x\n", msr);
+ pr_unimpl(vcpu, "unhandled wrmsr: 0x%x\n", msr);
return 1;
}
return 0;
@@ -1862,7 +1862,7 @@ int kvm_setup_pio(struct kvm_vcpu *vcpu,
/*
* String I/O in reverse. Yuck. Kill the guest, fix later.
*/
- printk(KERN_ERR "kvm: guest string pio down\n");
+ pr_unimpl(vcpu, "guest string pio down\n");
inject_gp(vcpu);
return 1;
}
@@ -1893,7 +1893,7 @@ int kvm_setup_pio(struct kvm_vcpu *vcpu,
ret = 1;
}
} else if (pio_dev)
- printk(KERN_ERR "no string pio read support yet, "
+ pr_unimpl(vcpu, "no string pio read support yet, "
"port %x size %d count %ld\n",
port, size, count);
diff -r 5266830ac99d drivers/kvm/svm.c
--- a/drivers/kvm/svm.c Tue Jul 24 16:22:15 2007 +1000
+++ b/drivers/kvm/svm.c Wed Jul 25 10:16:11 2007 +1000
@@ -1132,7 +1132,7 @@ static int invalid_op_interception(struc
static int task_switch_interception(struct kvm_vcpu *vcpu, struct kvm_run
*kvm_run)
{
- printk(KERN_DEBUG "%s: task swiche is unsupported\n", __FUNCTION__);
+ pr_unimpl(vcpu, "%s: task swiche is unsupported\n", __FUNCTION__);
kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
return 0;
}
diff -r 5266830ac99d drivers/kvm/vmx.c
--- a/drivers/kvm/vmx.c Tue Jul 24 16:22:15 2007 +1000
+++ b/drivers/kvm/vmx.c Wed Jul 25 09:59:50 2007 +1000
@@ -1807,7 +1807,7 @@ static int handle_cr(struct kvm_vcpu *vc
break;
}
kvm_run->exit_reason = 0;
- printk(KERN_ERR "kvm: unhandled control register: op %d cr %d\n",
+ pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n",
(int)(exit_qualification >> 4) & 3, cr);
return 0;
}
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