[PATCH 02/13] xen/grant-table: Move xlated_setup_gnttab_pages to common place

[shannon.zhao-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org]

From: Shannon Zhao <shannon.zhao-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>

Move xlated_setup_gnttab_pages to common place, so it can be reused by
ARM to setup grant table when booting with ACPI.

Signed-off-by: Shannon Zhao <shannon.zhao-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
---
 arch/x86/xen/grant-table.c | 51 ----------------------------------------------
 drivers/xen/grant-table.c  | 49 ++++++++++++++++++++++++++++++++++++++++++++
 include/xen/grant_table.h  |  1 +
 3 files changed, 50 insertions(+), 51 deletions(-)

diff --git a/arch/x86/xen/grant-table.c b/arch/x86/xen/grant-table.c
index 1580e7a..2a99a9a 100644
--- a/arch/x86/xen/grant-table.c
+++ b/arch/x86/xen/grant-table.c
@@ -111,57 +111,6 @@ int arch_gnttab_init(unsigned long nr_shared)
 }
 
 #ifdef CONFIG_XEN_PVH
-#include <xen/balloon.h>
-#include <xen/events.h>
-#include <linux/slab.h>
-static int __init xlated_setup_gnttab_pages(void)
-{
-	struct page **pages;
-	xen_pfn_t *pfns;
-	void *vaddr;
-	int rc;
-	unsigned int i;
-	unsigned long nr_grant_frames = gnttab_max_grant_frames();
-
-	BUG_ON(nr_grant_frames == 0);
-	pages = kcalloc(nr_grant_frames, sizeof(pages[0]), GFP_KERNEL);
-	if (!pages)
-		return -ENOMEM;
-
-	pfns = kcalloc(nr_grant_frames, sizeof(pfns[0]), GFP_KERNEL);
-	if (!pfns) {
-		kfree(pages);
-		return -ENOMEM;
-	}
-	rc = alloc_xenballooned_pages(nr_grant_frames, pages, 0 /* lowmem */);
-	if (rc) {
-		pr_warn("%s Couldn't balloon alloc %ld pfns rc:%d\n", __func__,
-			nr_grant_frames, rc);
-		kfree(pages);
-		kfree(pfns);
-		return rc;
-	}
-	for (i = 0; i < nr_grant_frames; i++)
-		pfns[i] = page_to_pfn(pages[i]);
-
-	vaddr = vmap(pages, nr_grant_frames, 0, PAGE_KERNEL);
-	if (!vaddr) {
-		pr_warn("%s Couldn't map %ld pfns rc:%d\n", __func__,
-			nr_grant_frames, rc);
-		free_xenballooned_pages(nr_grant_frames, pages);
-		kfree(pages);
-		kfree(pfns);
-		return -ENOMEM;
-	}
-	kfree(pages);
-
-	xen_auto_xlat_grant_frames.pfn = pfns;
-	xen_auto_xlat_grant_frames.count = nr_grant_frames;
-	xen_auto_xlat_grant_frames.vaddr = vaddr;
-
-	return 0;
-}
-
 static int __init xen_pvh_gnttab_setup(void)
 {
 	if (!xen_pvh_domain())
diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
index 62f591f..c084ba6 100644
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -664,6 +664,55 @@ int gnttab_setup_auto_xlat_frames(phys_addr_t addr)
 }
 EXPORT_SYMBOL_GPL(gnttab_setup_auto_xlat_frames);
 
+int __init xlated_setup_gnttab_pages(void)
+{
+	struct page **pages;
+	xen_pfn_t *pfns;
+	void *vaddr;
+	int rc;
+	unsigned int i;
+	unsigned long nr_grant_frames = gnttab_max_grant_frames();
+
+	BUG_ON(nr_grant_frames == 0);
+	pages = kcalloc(nr_grant_frames, sizeof(pages[0]), GFP_KERNEL);
+	if (!pages)
+		return -ENOMEM;
+
+	pfns = kcalloc(nr_grant_frames, sizeof(pfns[0]), GFP_KERNEL);
+	if (!pfns) {
+		kfree(pages);
+		return -ENOMEM;
+	}
+	rc = alloc_xenballooned_pages(nr_grant_frames, pages, 0 /* lowmem */);
+	if (rc) {
+		pr_warn("%s Couldn't balloon alloc %ld pfns rc:%d\n", __func__,
+			nr_grant_frames, rc);
+		kfree(pages);
+		kfree(pfns);
+		return rc;
+	}
+	for (i = 0; i < nr_grant_frames; i++)
+		pfns[i] = page_to_pfn(pages[i]);
+
+	vaddr = vmap(pages, nr_grant_frames, 0, PAGE_KERNEL);
+	if (!vaddr) {
+		pr_warn("%s Couldn't map %ld pfns rc:%d\n", __func__,
+			nr_grant_frames, rc);
+		free_xenballooned_pages(nr_grant_frames, pages);
+		kfree(pages);
+		kfree(pfns);
+		return -ENOMEM;
+	}
+	kfree(pages);
+
+	xen_auto_xlat_grant_frames.pfn = pfns;
+	xen_auto_xlat_grant_frames.count = nr_grant_frames;
+	xen_auto_xlat_grant_frames.vaddr = vaddr;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(xlated_setup_gnttab_pages);
+
 void gnttab_free_auto_xlat_frames(void)
 {
 	if (!xen_auto_xlat_grant_frames.count)
diff --git a/include/xen/grant_table.h b/include/xen/grant_table.h
index 4478f4b..fa31e66 100644
--- a/include/xen/grant_table.h
+++ b/include/xen/grant_table.h
@@ -177,6 +177,7 @@ struct grant_frames {
 extern struct grant_frames xen_auto_xlat_grant_frames;
 unsigned int gnttab_max_grant_frames(void);
 int gnttab_setup_auto_xlat_frames(phys_addr_t addr);
+int xlated_setup_gnttab_pages(void);
 void gnttab_free_auto_xlat_frames(void);
 
 #define gnttab_map_vaddr(map) ((void *)(map.host_virt_addr))
-- 
2.1.0