From: kfraser@localhost.localdomain <kfraser@localhost.localdomain>
Date: Thu, 30 Aug 2007 08:57:09 +0000 (+0100)
Subject: hvm: Provide an HVMOP_flush_tlbs to flush VCPU TLBs.
X-Git-Tag: 3.2.0-rc1~365^2~39
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=f57dc30e307d561093da5bf95d6bd45673997783;p=xen.git

hvm: Provide an HVMOP_flush_tlbs to flush VCPU TLBs.
From: Peter Johnston <pjohnston@xensource.com>
Signed-off-by: Keir Fraser <keir@xensource.com>
---

diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 0961f3372b..cb07b19289 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -1166,6 +1166,12 @@ static int hvmop_set_pci_link_route(
     return rc;
 }
 
+static int hvmop_flush_tlb_all(void)
+{
+    flush_tlb_mask(current->domain->domain_dirty_cpumask);
+    return 0;
+}
+
 long do_hvm_op(unsigned long op, XEN_GUEST_HANDLE(void) arg)
 
 {
@@ -1257,6 +1263,10 @@ long do_hvm_op(unsigned long op, XEN_GUEST_HANDLE(void) arg)
             guest_handle_cast(arg, xen_hvm_set_pci_link_route_t));
         break;
 
+    case HVMOP_flush_tlbs:
+        rc = guest_handle_is_null(arg) ? hvmop_flush_tlb_all() : -ENOSYS;
+        break;
+
     default:
     {
         gdprintk(XENLOG_WARNING, "Bad HVM op %ld.\n", op);
diff --git a/xen/include/public/hvm/hvm_op.h b/xen/include/public/hvm/hvm_op.h
index f568050949..b21b0f7abe 100644
--- a/xen/include/public/hvm/hvm_op.h
+++ b/xen/include/public/hvm/hvm_op.h
@@ -70,4 +70,7 @@ struct xen_hvm_set_pci_link_route {
 typedef struct xen_hvm_set_pci_link_route xen_hvm_set_pci_link_route_t;
 DEFINE_XEN_GUEST_HANDLE(xen_hvm_set_pci_link_route_t);
 
+/* Flushes all VCPU TLBs: @arg must be NULL. */
+#define HVMOP_flush_tlbs          5
+
 #endif /* __XEN_PUBLIC_HVM_HVM_OP_H__ */