6 files changed, 74 insertions, 58 deletions

diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile
index 96ab2c09cb68..7322755f337a 100644
--- a/arch/x86/xen/Makefile
+++ b/arch/x86/xen/Makefile
@@ -22,3 +22,4 @@ obj-$(CONFIG_PARAVIRT_SPINLOCKS)+= spinlock.o
 obj-$(CONFIG_XEN_DEBUG_FS)	+= debugfs.o
 obj-$(CONFIG_XEN_DOM0)		+= apic.o vga.o
 obj-$(CONFIG_SWIOTLB_XEN)	+= pci-swiotlb-xen.o
+obj-$(CONFIG_XEN_EFI)		+= efi.o
diff --git a/arch/x86/xen/efi.c b/arch/x86/xen/efi.c
new file mode 100644
index 000000000000..a02e09e18f57
--- /dev/null
+++ b/arch/x86/xen/efi.c
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2014 Oracle Co., Daniel Kiper
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/efi.h>
+#include <linux/init.h>
+#include <linux/string.h>
+
+#include <xen/xen-ops.h>
+
+#include <asm/setup.h>
+
+void __init xen_efi_init(void)
+{
+	efi_system_table_t *efi_systab_xen;
+
+	efi_systab_xen = xen_efi_probe();
+
+	if (efi_systab_xen == NULL)
+		return;
+
+	strncpy((char *)&boot_params.efi_info.efi_loader_signature, "Xen",
+			sizeof(boot_params.efi_info.efi_loader_signature));
+	boot_params.efi_info.efi_systab = (__u32)__pa(efi_systab_xen);
+	boot_params.efi_info.efi_systab_hi = (__u32)(__pa(efi_systab_xen) >> 32);
+
+	set_bit(EFI_BOOT, &efi.flags);
+	set_bit(EFI_PARAVIRT, &efi.flags);
+	set_bit(EFI_64BIT, &efi.flags);
+}
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index ffb101e45731..c0cb11fb5008 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1718,6 +1718,8 @@ asmlinkage __visible void __init xen_start_kernel(void)
 
 	xen_setup_runstate_info(0);
 
+	xen_efi_init();
+
 	/* Start the world */
 #ifdef CONFIG_X86_32
 	i386_start_kernel();
@@ -1826,8 +1828,19 @@ static void __init xen_hvm_guest_init(void)
 	xen_hvm_init_mmu_ops();
 }
 
+static bool xen_nopv = false;
+static __init int xen_parse_nopv(char *arg)
+{
+       xen_nopv = true;
+       return 0;
+}
+early_param("xen_nopv", xen_parse_nopv);
+
 static uint32_t __init xen_hvm_platform(void)
 {
+	if (xen_nopv)
+		return 0;
+
 	if (xen_pv_domain())
 		return 0;
 
@@ -1836,6 +1849,8 @@ static uint32_t __init xen_hvm_platform(void)
 
 bool xen_hvm_need_lapic(void)
 {
+	if (xen_nopv)
+		return false;
 	if (xen_pv_domain())
 		return false;
 	if (!xen_hvm_domain())
diff --git a/arch/x86/xen/grant-table.c b/arch/x86/xen/grant-table.c
index ebfa9b2c871d..c0413046483a 100644
--- a/arch/x86/xen/grant-table.c
+++ b/arch/x86/xen/grant-table.c
@@ -49,7 +49,7 @@
 static struct gnttab_vm_area {
 	struct vm_struct *area;
 	pte_t **ptes;
-} gnttab_shared_vm_area, gnttab_status_vm_area;
+} gnttab_shared_vm_area;
 
 int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes,
 			   unsigned long max_nr_gframes,
@@ -73,43 +73,16 @@ int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes,
 	return 0;
 }
 
-int arch_gnttab_map_status(uint64_t *frames, unsigned long nr_gframes,
-			   unsigned long max_nr_gframes,
-			   grant_status_t **__shared)
-{
-	grant_status_t *shared = *__shared;
-	unsigned long addr;
-	unsigned long i;
-
-	if (shared == NULL)
-		*__shared = shared = gnttab_status_vm_area.area->addr;
-
-	addr = (unsigned long)shared;
-
-	for (i = 0; i < nr_gframes; i++) {
-		set_pte_at(&init_mm, addr, gnttab_status_vm_area.ptes[i],
-			   mfn_pte(frames[i], PAGE_KERNEL));
-		addr += PAGE_SIZE;
-	}
-
-	return 0;
-}
-
 void arch_gnttab_unmap(void *shared, unsigned long nr_gframes)
 {
-	pte_t **ptes;
 	unsigned long addr;
 	unsigned long i;
 
-	if (shared == gnttab_status_vm_area.area->addr)
-		ptes = gnttab_status_vm_area.ptes;
-	else
-		ptes = gnttab_shared_vm_area.ptes;
-
 	addr = (unsigned long)shared;
 
 	for (i = 0; i < nr_gframes; i++) {
-		set_pte_at(&init_mm, addr, ptes[i], __pte(0));
+		set_pte_at(&init_mm, addr, gnttab_shared_vm_area.ptes[i],
+			   __pte(0));
 		addr += PAGE_SIZE;
 	}
 }
@@ -129,35 +102,12 @@ static int arch_gnttab_valloc(struct gnttab_vm_area *area, unsigned nr_frames)
 	return 0;
 }
 
-static void arch_gnttab_vfree(struct gnttab_vm_area *area)
+int arch_gnttab_init(unsigned long nr_shared)
 {
-	free_vm_area(area->area);
-	kfree(area->ptes);
-}
-
-int arch_gnttab_init(unsigned long nr_shared, unsigned long nr_status)
-{
-	int ret;
-
 	if (!xen_pv_domain())
 		return 0;
 
-	ret = arch_gnttab_valloc(&gnttab_shared_vm_area, nr_shared);
-	if (ret < 0)
-		return ret;
-
-	/*
-	 * Always allocate the space for the status frames in case
-	 * we're migrated to a host with V2 support.
-	 */
-	ret = arch_gnttab_valloc(&gnttab_status_vm_area, nr_status);
-	if (ret < 0)
-		goto err;
-
-	return 0;
-  err:
-	arch_gnttab_vfree(&gnttab_shared_vm_area);
-	return -ENOMEM;
+	return arch_gnttab_valloc(&gnttab_shared_vm_area, nr_shared);
 }
 
 #ifdef CONFIG_XEN_PVH
diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c
index 9bb3d82ffec8..3172692381ae 100644
--- a/arch/x86/xen/p2m.c
+++ b/arch/x86/xen/p2m.c
@@ -841,10 +841,9 @@ unsigned long __init set_phys_range_identity(unsigned long pfn_s,
 			pfn = ALIGN(pfn, P2M_PER_PAGE);
 	}
 
-	if (!WARN((pfn - pfn_s) != (pfn_e - pfn_s),
+	WARN((pfn - pfn_s) != (pfn_e - pfn_s),
 		"Identity mapping failed. We are %ld short of 1-1 mappings!\n",
-		(pfn_e - pfn_s) - (pfn - pfn_s)))
-		printk(KERN_DEBUG "1-1 mapping on %lx->%lx\n", pfn_s, pfn);
+		(pfn_e - pfn_s) - (pfn - pfn_s));
 
 	return pfn - pfn_s;
 }
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index 97d87659f779..28c7e0be56e4 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -105,6 +105,14 @@ static inline void __init xen_init_apic(void)
 }
 #endif
 
+#ifdef CONFIG_XEN_EFI
+extern void xen_efi_init(void);
+#else
+static inline void __init xen_efi_init(void)
+{
+}
+#endif
+
 /* Declare an asm function, along with symbols needed to make it
    inlineable */
 #define DECL_ASM(ret, name, ...)		\