[PATCH]Implement domctl_sendtrigger_nmi for x86 hvm

[Yosuke Iwamatsu <y-iwamatsu@ab.jp.nec.com>]

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Hi there,

This patch implements DOMCTL_SENDTRIGGER_NMI hypercall
for x86 hvm domains.
we can manually inject NMI into a domain by using
'xm trigger [domain] nmi [vcpu]'.

Regards,
-------------------
Yosuke Iwamatsu
        NEC Corporation


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# HG changeset patch
# User Yosuke Iwamatsu <y-iwamatsu@ab.jp.nec.com>
# Date 1184291863 -32400
# Node ID aa538b0b8a496fee48a1c75ae0bec78ea7f31dfc
# Parent  1f348e70a5affdea9b44c1e39cd5ef094ad4a0bf
Implement DOMCTL_SENDTRIGGER_NMI for x86 hvm

Signed-off-by: Yosuke Iwamatsu <y-iwamatsu@ab.jp.nec.com>

diff -r 1f348e70a5af -r aa538b0b8a49 xen/arch/x86/domctl.c
--- a/xen/arch/x86/domctl.c	Tue Jul 10 11:10:38 2007 +0100
+++ b/xen/arch/x86/domctl.c	Fri Jul 13 10:57:43 2007 +0900
@@ -427,6 +427,46 @@ long arch_do_domctl(
     }
     break;
 
+    case XEN_DOMCTL_sendtrigger:
+    {
+        struct domain *d;
+        struct vcpu *v;
+
+        ret = -ESRCH;
+        if ( (d = rcu_lock_domain_by_id(domctl->domain)) == NULL )
+            break;
+
+        ret = -EINVAL;
+        if ( domctl->u.sendtrigger.vcpu >= MAX_VIRT_CPUS )
+            goto sendtrigger_out;
+
+        ret = -ESRCH;
+        if ( (v = d->vcpu[domctl->u.sendtrigger.vcpu]) == NULL )
+            goto sendtrigger_out;
+
+        switch (domctl->u.sendtrigger.trigger)
+        {
+        case XEN_DOMCTL_SENDTRIGGER_NMI:
+        {
+            ret = -ENOSYS;
+            if ( !is_hvm_domain(d) )
+                break;
+
+            ret = 0;
+            if ( !test_and_set_bool(v->arch.hvm_vcpu.nmi_pending) )
+                vcpu_kick(v);
+        }
+        break;
+
+        default:
+            ret = -ENOSYS;
+        }
+
+    sendtrigger_out:
+        rcu_unlock_domain(d);
+    }
+    break;
+
     default:
         ret = -ENOSYS;
         break;

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