From: Suresh Siddha <suresh.b.siddha@intel.com>
Subject: x86: apic_ops for lguest
References: fate #303948 and fate #303984
Patch-Mainline: queued for .28
Commit-ID: 511d9d34183662aada3890883e860b151d707e22

Signed-off-by: Thomas Renninger <trenn@suse.de>

apic_ops for lguest.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Acked-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

---
 arch/x86/lguest/boot.c |   34 ++++++++++++++++++++++++++++++++--
 1 file changed, 32 insertions(+), 2 deletions(-)

Index: linux-2.6.26/arch/x86/lguest/boot.c
===================================================================
--- linux-2.6.26.orig/arch/x86/lguest/boot.c
+++ linux-2.6.26/arch/x86/lguest/boot.c
@@ -792,6 +792,37 @@ static u32 lguest_apic_read(u32 reg)
 {
 	return 0;
 }
+
+static u64 lguest_apic_icr_read(void)
+{
+	return 0;
+}
+
+static void lguest_apic_icr_write(u32 low, u32 id)
+{
+	/* Warn to see if there's any stray references */
+	WARN_ON(1);
+}
+
+static void lguest_apic_wait_icr_idle(void)
+{
+	return;
+}
+
+static u32 lguest_apic_safe_wait_icr_idle(void)
+{
+	return 0;
+}
+
+static struct apic_ops lguest_basic_apic_ops = {
+	.read = lguest_apic_read,
+	.write = lguest_apic_write,
+	.write_atomic = lguest_apic_write,
+	.icr_read = lguest_apic_icr_read,
+	.icr_write = lguest_apic_icr_write,
+	.wait_icr_idle = lguest_apic_wait_icr_idle,
+	.safe_wait_icr_idle = lguest_apic_safe_wait_icr_idle,
+};
 #endif
 
 /* STOP!  Until an interrupt comes in. */
@@ -991,8 +1022,7 @@ __init void lguest_init(void)
 
 #ifdef CONFIG_X86_LOCAL_APIC
 	/* apic read/write intercepts */
-	pv_apic_ops.apic_write = lguest_apic_write;
-	pv_apic_ops.apic_read = lguest_apic_read;
+	apic_ops = &lguest_basic_apic_ops;
 #endif
 
 	/* time operations */