[Xen-ia64-devel] [PATCH 22/23] vti domain save/restore: libxc: add support set/get_hvmcontext support

[Isaku Yamahata <yamahata@xxxxxxxxxxxxx>]

# HG changeset patch
# User yamahata@xxxxxxxxxxxxx
# Date 1192097456 -32400
# Node ID 6f9435bb6a195a52cb43799b82cc24cdc7a298f3
# Parent  9009a8f49f11378d562a4aed005b17f136a773c0
implement set/gethvmcontext hypercall
PATCHNAME: implement_set_get_hvmcontext_hypercall

Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>

diff -r 9009a8f49f11 -r 6f9435bb6a19 xen/arch/ia64/xen/dom0_ops.c
--- a/xen/arch/ia64/xen/dom0_ops.c      Thu Oct 11 20:10:30 2007 +0900
+++ b/xen/arch/ia64/xen/dom0_ops.c      Thu Oct 11 19:10:56 2007 +0900
@@ -24,6 +24,9 @@
 #include <xen/errno.h>
 #include <xen/nodemask.h>
 #include <asm/dom_fw_utils.h>
+#include <asm/hvm/support.h>
+#include <xsm/xsm.h>
+#include <public/hvm/save.h>
 
 #define get_xen_guest_handle(val, hnd)  do { val = (hnd).p; } while (0)
 
@@ -217,6 +220,109 @@ long arch_do_domctl(xen_domctl_t *op, XE
     }
     break;
 
+    case XEN_DOMCTL_sethvmcontext:
+    { 
+        struct hvm_domain_context c;
+        struct domain             *d;
+
+        c.cur = 0;
+        c.size = op->u.hvmcontext.size;
+        c.data = NULL;
+        
+        ret = -ESRCH;
+        if ( (d = rcu_lock_domain_by_id(op->domain)) == NULL )
+            break;
+
+#ifdef CONFIG_X86
+        ret = xsm_hvmcontext(d, op->cmd);
+        if ( ret )
+            goto sethvmcontext_out;
+#endif /* CONFIG_X86 */
+
+        ret = -EINVAL;
+        if ( !is_hvm_domain(d) ) 
+            goto sethvmcontext_out;
+
+        ret = -ENOMEM;
+        if ( (c.data = xmalloc_bytes(c.size)) == NULL )
+            goto sethvmcontext_out;
+
+        ret = -EFAULT;
+        if ( copy_from_guest(c.data, op->u.hvmcontext.buffer, c.size) != 0)
+            goto sethvmcontext_out;
+
+        domain_pause(d);
+        ret = hvm_load(d, &c);
+        domain_unpause(d);
+
+    sethvmcontext_out:
+        if ( c.data != NULL )
+            xfree(c.data);
+
+        rcu_unlock_domain(d);
+    }
+    break;
+
+    case XEN_DOMCTL_gethvmcontext:
+    { 
+        struct hvm_domain_context c;
+        struct domain             *d;
+
+        ret = -ESRCH;
+        if ( (d = rcu_lock_domain_by_id(op->domain)) == NULL )
+            break;
+
+#ifdef CONFIG_X86
+        ret = xsm_hvmcontext(d, op->cmd);
+        if ( ret )
+            goto gethvmcontext_out;
+#endif /* CONFIG_X86 */
+
+        ret = -EINVAL;
+        if ( !is_hvm_domain(d) ) 
+            goto gethvmcontext_out;
+
+        c.cur = 0;
+        c.size = hvm_save_size(d);
+        c.data = NULL;
+
+        if ( guest_handle_is_null(op->u.hvmcontext.buffer) )
+        {
+            /* Client is querying for the correct buffer size */
+            op->u.hvmcontext.size = c.size;
+            ret = 0;
+            goto gethvmcontext_out;            
+        }
+
+        /* Check that the client has a big enough buffer */
+        ret = -ENOSPC;
+        if ( op->u.hvmcontext.size < c.size ) 
+            goto gethvmcontext_out;
+
+        /* Allocate our own marshalling buffer */
+        ret = -ENOMEM;
+        if ( (c.data = xmalloc_bytes(c.size)) == NULL )
+            goto gethvmcontext_out;
+
+        domain_pause(d);
+        ret = hvm_save(d, &c);
+        domain_unpause(d);
+
+        op->u.hvmcontext.size = c.cur;
+        if ( copy_to_guest(op->u.hvmcontext.buffer, c.data, c.size) != 0 )
+            ret = -EFAULT;
+
+    gethvmcontext_out:
+        if ( copy_to_guest(u_domctl, op, 1) )
+            ret = -EFAULT;
+
+        if ( c.data != NULL )
+            xfree(c.data);
+
+        rcu_unlock_domain(d);
+    }
+    break;
+
     default:
         printk("arch_do_domctl: unrecognized domctl: %d!!!\n",op->cmd);
         ret = -ENOSYS;

Attachment: 16069_6f9435bb6a19_implement_set_get_hvmcontext_hypercall.patch
Description: Text Data

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