# HG changeset patch
# User gingold@xxxxxxxxxxxxxxxxxxxxx
# Date 1171531715 -3600
# Node ID 4c7ae244a9785f5bebc499d9f3de927b9c2081b9
# Parent  bf91ad7f63dd4f44403c3b00b4678d2dd1ef1e51
Return to SAL added for VTi by adding a new SAL (OEM defined) function.
Using this patch I was able to hot-add/hot-remove under linux (in fact
virtualized hot).

Signed-off-by: Tristan Gingold <tgingold@xxxxxxx>

diff -r bf91ad7f63dd -r 4c7ae244a978 xen/arch/ia64/vmx/vlsapic.c
--- a/xen/arch/ia64/vmx/vlsapic.c	Thu Feb 15 09:59:08 2007 +0100
+++ b/xen/arch/ia64/vmx/vlsapic.c	Thu Feb 15 10:28:35 2007 +0100
@@ -672,7 +672,8 @@ static void vlsapic_write_ipi(VCPU *vcpu
     if (targ == NULL)
         panic_domain(NULL, "Unknown IPI cpu\n");
 
-    if (!test_bit(_VCPUF_initialised, &targ->vcpu_flags)) {
+    if (!test_bit(_VCPUF_initialised, &targ->vcpu_flags)
+	|| test_bit(_VCPUF_down, &targ->vcpu_flags)) {
         struct pt_regs *targ_regs = vcpu_regs(targ);
         struct vcpu_guest_context c;
 
diff -r bf91ad7f63dd -r 4c7ae244a978 xen/arch/ia64/xen/fw_emul.c
--- a/xen/arch/ia64/xen/fw_emul.c	Thu Feb 15 09:59:08 2007 +0100
+++ b/xen/arch/ia64/xen/fw_emul.c	Thu Feb 15 10:28:35 2007 +0100
@@ -369,6 +369,10 @@ sal_emulator (long index, unsigned long 
 		break;
 	    case SAL_UPDATE_PAL:
 		printk("*** CALLED SAL_UPDATE_PAL.  IGNORED...\n");
+		break;
+	    case SAL_XEN_SAL_RETURN:
+	        if ( !test_and_set_bit(_VCPUF_down, &current->vcpu_flags) )
+			vcpu_sleep_nosync(current);
 		break;
 	    default:
 		printk("*** CALLED SAL_ WITH UNKNOWN INDEX.  IGNORED...\n");
diff -r bf91ad7f63dd -r 4c7ae244a978 xen/include/asm-ia64/dom_fw.h
--- a/xen/include/asm-ia64/dom_fw.h	Thu Feb 15 09:59:08 2007 +0100
+++ b/xen/include/asm-ia64/dom_fw.h	Thu Feb 15 10:28:35 2007 +0100
@@ -180,6 +180,9 @@
 
 #define EFI_MEMDESC_VERSION		1
 
+/* Additionnal OEM SAL.  */
+#define SAL_XEN_SAL_RETURN	0x02000000
+
 extern struct ia64_pal_retval xen_pal_emulator(u64, u64, u64, u64);
 extern struct sal_ret_values sal_emulator (long index, unsigned long in1, unsigned long in2, unsigned long in3, unsigned long in4, unsigned long in5, unsigned long in6, unsigned long in7);
 extern struct ia64_pal_retval pal_emulator_static (unsigned long);