linux-kernel - [PATCH 2/3] Xen pad paravirt interface

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Date:	Fri, 17 Feb 2012 08:57:49 +0000
From:	"Liu, Jinsong" <jinsong.liu@...el.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	Kernel development list <linux-kernel@...r.kernel.org>
CC:	"Li, Shaohua" <shaohua.li@...el.com>,
	Jan Beulich <JBeulich@...e.com>,
	"keir.xen@...il.com" <keir.xen@...il.com>
Subject: [PATCH 2/3] Xen pad paravirt interface

>From 9b7dbe30e9d2a862a0931ee365e832bbd4d6c2e5 Mon Sep 17 00:00:00 2001
From: Liu, Jinsong <jinsong.liu@...el.com>
Date: Fri, 10 Feb 2012 20:34:46 +0800
Subject: [PATCH 2/3] Xen pad paravirt interface

Redirect paravirt template to Xen pv ops, preparing for Xen core parking.

Signed-off-by: Liu, Jinsong <jinsong.liu@...el.com>
---
 arch/x86/xen/enlighten.c   |    6 ++++++
 drivers/xen/Makefile       |    1 +
 drivers/xen/xen_acpi_pad.c |    8 ++++++++
 include/xen/xen-ops.h      |    3 +++
 4 files changed, 18 insertions(+), 0 deletions(-)
 create mode 100644 drivers/xen/xen_acpi_pad.c

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 12eb07b..5b4f209 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1023,6 +1023,11 @@ static const struct pv_cpu_ops xen_cpu_ops __initconst = {
 	.end_context_switch = xen_end_context_switch,
 };
 
+static const struct pv_pad_ops xen_pad_ops __initconst = {
+	.acpi_pad_init = xen_acpi_pad_init,
+	.acpi_pad_exit = xen_acpi_pad_exit,
+};
+
 static const struct pv_apic_ops xen_apic_ops __initconst = {
 #ifdef CONFIG_X86_LOCAL_APIC
 	.startup_ipi_hook = paravirt_nop,
@@ -1126,6 +1131,7 @@ asmlinkage void __init xen_start_kernel(void)
 	pv_init_ops = xen_init_ops;
 	pv_cpu_ops = xen_cpu_ops;
 	pv_apic_ops = xen_apic_ops;
+	pv_pad_ops = xen_pad_ops;
 
 	x86_init.resources.memory_setup = xen_memory_setup;
 	x86_init.oem.arch_setup = xen_arch_setup;
diff --git a/drivers/xen/Makefile b/drivers/xen/Makefile
index aa31337..c0268c9 100644
--- a/drivers/xen/Makefile
+++ b/drivers/xen/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_SWIOTLB_XEN)		+= swiotlb-xen.o
 obj-$(CONFIG_XEN_DOM0)			+= pci.o
 obj-$(CONFIG_XEN_PCIDEV_BACKEND)	+= xen-pciback/
 obj-$(CONFIG_XEN_PRIVCMD)		+= xen-privcmd.o
+obj-$(CONFIG_XEN_DOM0)			+= xen_acpi_pad.o
 
 xen-evtchn-y				:= evtchn.o
 xen-gntdev-y				:= gntdev.o
diff --git a/drivers/xen/xen_acpi_pad.c b/drivers/xen/xen_acpi_pad.c
new file mode 100644
index 0000000..63ab2fb
--- /dev/null
+++ b/drivers/xen/xen_acpi_pad.c
@@ -0,0 +1,8 @@
+int xen_acpi_pad_init(void)
+{
+	return 0;
+}
+
+void xen_acpi_pad_exit(void)
+{
+}
diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h
index 03c85d7..eeb0d38 100644
--- a/include/xen/xen-ops.h
+++ b/include/xen/xen-ops.h
@@ -28,4 +28,7 @@ int xen_remap_domain_mfn_range(struct vm_area_struct *vma,
 			       unsigned long mfn, int nr,
 			       pgprot_t prot, unsigned domid);
 
+int xen_acpi_pad_init(void);
+void xen_acpi_pad_exit(void);
+
 #endif /* INCLUDE_XEN_OPS_H */
-- 
1.7.1

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