Merge branch 'x86-paravirt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 paravirt updates from Ingo Molnar:
 "Two main changes:

   - Remove no longer used parts of the paravirt infrastructure and put
     large quantities of paravirt ops under a new config option
     PARAVIRT_XXL=y, which is selected by XEN_PV only. (Joergen Gross)

   - Enable PV spinlocks on Hyperv (Yi Sun)"

* 'x86-paravirt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/hyperv: Enable PV qspinlock for Hyper-V
  x86/hyperv: Add GUEST_IDLE_MSR support
  x86/paravirt: Clean up native_patch()
  x86/paravirt: Prevent redefinition of SAVE_FLAGS macro
  x86/xen: Make xen_reservation_lock static
  x86/paravirt: Remove unneeded mmu related paravirt ops bits
  x86/paravirt: Move the Xen-only pv_mmu_ops under the PARAVIRT_XXL umbrella
  x86/paravirt: Move the pv_irq_ops under the PARAVIRT_XXL umbrella
  x86/paravirt: Move the Xen-only pv_cpu_ops under the PARAVIRT_XXL umbrella
  x86/paravirt: Move items in pv_info under PARAVIRT_XXL umbrella
  x86/paravirt: Introduce new config option PARAVIRT_XXL
  x86/paravirt: Remove unused paravirt bits
  x86/paravirt: Use a single ops structure
  x86/paravirt: Remove clobbers from struct paravirt_patch_site
  x86/paravirt: Remove clobbers parameter from paravirt patch functions
  x86/paravirt: Make paravirt_patch_call() and paravirt_patch_jmp() static
  x86/xen: Add SPDX identifier in arch/x86/xen files
  x86/xen: Link platform-pci-unplug.o only if CONFIG_XEN_PVHVM
  x86/xen: Move pv specific parts of arch/x86/xen/mmu.c to mmu_pv.c
  x86/xen: Move pv irq related functions under CONFIG_XEN_PV umbrella

18 files changed, 232 insertions, 298 deletions

diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
index 14be6a5935e1..1ef391aa184d 100644
--- a/arch/x86/xen/Kconfig
+++ b/arch/x86/xen/Kconfig
@@ -18,6 +18,7 @@ config XEN_PV
 	bool "Xen PV guest support"
 	default y
 	depends on XEN
+	select PARAVIRT_XXL
 	select XEN_HAVE_PVMMU
 	select XEN_HAVE_VPMU
 	help
diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile
index d83cb5478f54..dd2550d33b38 100644
--- a/arch/x86/xen/Makefile
+++ b/arch/x86/xen/Makefile
@@ -12,25 +12,46 @@ endif
 # Make sure early boot has no stackprotector
 nostackp := $(call cc-option, -fno-stack-protector)
 CFLAGS_enlighten_pv.o		:= $(nostackp)
-CFLAGS_mmu_pv.o		:= $(nostackp)
+CFLAGS_mmu_pv.o			:= $(nostackp)
 
-obj-y		:= enlighten.o multicalls.o mmu.o irq.o \
-			time.o xen-asm.o xen-asm_$(BITS).o \
-			grant-table.o suspend.o platform-pci-unplug.o
+obj-y				+= enlighten.o
+obj-y				+= mmu.o
+obj-y				+= time.o
+obj-y				+= grant-table.o
+obj-y				+= suspend.o
 
-obj-$(CONFIG_XEN_PVHVM)		+= enlighten_hvm.o mmu_hvm.o suspend_hvm.o
-obj-$(CONFIG_XEN_PV)			+= setup.o apic.o pmu.o suspend_pv.o \
-						p2m.o enlighten_pv.o mmu_pv.o
-obj-$(CONFIG_XEN_PVH)			+= enlighten_pvh.o
+obj-$(CONFIG_XEN_PVHVM)		+= enlighten_hvm.o
+obj-$(CONFIG_XEN_PVHVM)		+= mmu_hvm.o
+obj-$(CONFIG_XEN_PVHVM)		+= suspend_hvm.o
+obj-$(CONFIG_XEN_PVHVM)		+= platform-pci-unplug.o
 
-obj-$(CONFIG_EVENT_TRACING) += trace.o
+obj-$(CONFIG_XEN_PV)		+= setup.o
+obj-$(CONFIG_XEN_PV)		+= apic.o
+obj-$(CONFIG_XEN_PV)		+= pmu.o
+obj-$(CONFIG_XEN_PV)		+= suspend_pv.o
+obj-$(CONFIG_XEN_PV)		+= p2m.o
+obj-$(CONFIG_XEN_PV)		+= enlighten_pv.o
+obj-$(CONFIG_XEN_PV)		+= mmu_pv.o
+obj-$(CONFIG_XEN_PV)		+= irq.o
+obj-$(CONFIG_XEN_PV)		+= multicalls.o
+obj-$(CONFIG_XEN_PV)		+= xen-asm.o
+obj-$(CONFIG_XEN_PV)		+= xen-asm_$(BITS).o
+
+obj-$(CONFIG_XEN_PVH)		+= enlighten_pvh.o
+obj-$(CONFIG_XEN_PVH)	 	+= xen-pvh.o
+
+obj-$(CONFIG_EVENT_TRACING)	+= trace.o
 
 obj-$(CONFIG_SMP)		+= smp.o
 obj-$(CONFIG_XEN_PV_SMP)  	+= smp_pv.o
 obj-$(CONFIG_XEN_PVHVM_SMP)  	+= smp_hvm.o
+
 obj-$(CONFIG_PARAVIRT_SPINLOCKS)+= spinlock.o
+
 obj-$(CONFIG_XEN_DEBUG_FS)	+= debugfs.o
+
 obj-$(CONFIG_XEN_DOM0)		+= vga.o
+
 obj-$(CONFIG_SWIOTLB_XEN)	+= pci-swiotlb-xen.o
+
 obj-$(CONFIG_XEN_EFI)		+= efi.o
-obj-$(CONFIG_XEN_PVH)	 	+= xen-pvh.o
diff --git a/arch/x86/xen/efi.c b/arch/x86/xen/efi.c
index 1804b27f9632..1fbb629a9d78 100644
--- a/arch/x86/xen/efi.c
+++ b/arch/x86/xen/efi.c
@@ -1,18 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * 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/bitops.h>
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 0ca46e03b830..67b2f31a1265 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0
+
 #ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG
 #include <linux/bootmem.h>
 #endif
diff --git a/arch/x86/xen/enlighten_hvm.c b/arch/x86/xen/enlighten_hvm.c
index 19c1ff542387..0e75642d42a3 100644
--- a/arch/x86/xen/enlighten_hvm.c
+++ b/arch/x86/xen/enlighten_hvm.c
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0
+
 #include <linux/acpi.h>
 #include <linux/cpu.h>
 #include <linux/kexec.h>
diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
index 52a7c3faee0c..ec7a4209f310 100644
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -995,11 +995,14 @@ void __init xen_setup_vcpu_info_placement(void)
 	 * percpu area for all cpus, so make use of it.
 	 */
 	if (xen_have_vcpu_info_placement) {
-		pv_irq_ops.save_fl = __PV_IS_CALLEE_SAVE(xen_save_fl_direct);
-		pv_irq_ops.restore_fl = __PV_IS_CALLEE_SAVE(xen_restore_fl_direct);
-		pv_irq_ops.irq_disable = __PV_IS_CALLEE_SAVE(xen_irq_disable_direct);
-		pv_irq_ops.irq_enable = __PV_IS_CALLEE_SAVE(xen_irq_enable_direct);
-		pv_mmu_ops.read_cr2 = xen_read_cr2_direct;
+		pv_ops.irq.save_fl = __PV_IS_CALLEE_SAVE(xen_save_fl_direct);
+		pv_ops.irq.restore_fl =
+			__PV_IS_CALLEE_SAVE(xen_restore_fl_direct);
+		pv_ops.irq.irq_disable =
+			__PV_IS_CALLEE_SAVE(xen_irq_disable_direct);
+		pv_ops.irq.irq_enable =
+			__PV_IS_CALLEE_SAVE(xen_irq_enable_direct);
+		pv_ops.mmu.read_cr2 = xen_read_cr2_direct;
 	}
 }
 
@@ -1174,14 +1177,14 @@ static void __init xen_boot_params_init_edd(void)
  */
 static void __init xen_setup_gdt(int cpu)
 {
-	pv_cpu_ops.write_gdt_entry = xen_write_gdt_entry_boot;
-	pv_cpu_ops.load_gdt = xen_load_gdt_boot;
+	pv_ops.cpu.write_gdt_entry = xen_write_gdt_entry_boot;
+	pv_ops.cpu.load_gdt = xen_load_gdt_boot;
 
 	setup_stack_canary_segment(cpu);
 	switch_to_new_gdt(cpu);
 
-	pv_cpu_ops.write_gdt_entry = xen_write_gdt_entry;
-	pv_cpu_ops.load_gdt = xen_load_gdt;
+	pv_ops.cpu.write_gdt_entry = xen_write_gdt_entry;
+	pv_ops.cpu.load_gdt = xen_load_gdt;
 }
 
 static void __init xen_dom0_set_legacy_features(void)
@@ -1206,8 +1209,8 @@ asmlinkage __visible void __init xen_start_kernel(void)
 
 	/* Install Xen paravirt ops */
 	pv_info = xen_info;
-	pv_init_ops.patch = paravirt_patch_default;
-	pv_cpu_ops = xen_cpu_ops;
+	pv_ops.init.patch = paravirt_patch_default;
+	pv_ops.cpu = xen_cpu_ops;
 	xen_init_irq_ops();
 
 	/*
@@ -1276,8 +1279,10 @@ asmlinkage __visible void __init xen_start_kernel(void)
 #endif
 
 	if (xen_feature(XENFEAT_mmu_pt_update_preserve_ad)) {
-		pv_mmu_ops.ptep_modify_prot_start = xen_ptep_modify_prot_start;
-		pv_mmu_ops.ptep_modify_prot_commit = xen_ptep_modify_prot_commit;
+		pv_ops.mmu.ptep_modify_prot_start =
+			xen_ptep_modify_prot_start;
+		pv_ops.mmu.ptep_modify_prot_commit =
+			xen_ptep_modify_prot_commit;
 	}
 
 	machine_ops = xen_machine_ops;
diff --git a/arch/x86/xen/grant-table.c b/arch/x86/xen/grant-table.c
index 92ccc718152d..ecb0d5450334 100644
--- a/arch/x86/xen/grant-table.c
+++ b/arch/x86/xen/grant-table.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
 /******************************************************************************
  * grant_table.c
  * x86 specific part
@@ -8,30 +9,6 @@
  * Copyright (c) 2004-2005, K A Fraser
  * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
  *                    VA Linux Systems Japan. Split out x86 specific part.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation; or, when distributed
- * separately from the Linux kernel or incorporated into other
- * software packages, subject to the following license:
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this source file (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use, copy, modify,
- * merge, publish, distribute, sublicense, and/or sell copies of the Software,
- * and to permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
  */
 
 #include <linux/sched.h>
diff --git a/arch/x86/xen/irq.c b/arch/x86/xen/irq.c
index 7515a19fd324..850c93f346c7 100644
--- a/arch/x86/xen/irq.c
+++ b/arch/x86/xen/irq.c
@@ -128,6 +128,6 @@ static const struct pv_irq_ops xen_irq_ops __initconst = {
 
 void __init xen_init_irq_ops(void)
 {
-	pv_irq_ops = xen_irq_ops;
+	pv_ops.irq = xen_irq_ops;
 	x86_init.irqs.intr_init = xen_init_IRQ;
 }
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 96fc2f0fdbfe..60e9c37fd79f 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0
+
 #include <linux/pfn.h>
 #include <asm/xen/page.h>
 #include <asm/xen/hypercall.h>
@@ -6,12 +8,6 @@
 #include "multicalls.h"
 #include "mmu.h"
 
-/*
- * Protects atomic reservation decrease/increase against concurrent increases.
- * Also protects non-atomic updates of current_pages and balloon lists.
- */
-DEFINE_SPINLOCK(xen_reservation_lock);
-
 unsigned long arbitrary_virt_to_mfn(void *vaddr)
 {
 	xmaddr_t maddr = arbitrary_virt_to_machine(vaddr);
@@ -42,186 +38,6 @@ xmaddr_t arbitrary_virt_to_machine(void *vaddr)
 }
 EXPORT_SYMBOL_GPL(arbitrary_virt_to_machine);
 
-static noinline void xen_flush_tlb_all(void)
-{
-	struct mmuext_op *op;
-	struct multicall_space mcs;
-
-	preempt_disable();
-
-	mcs = xen_mc_entry(sizeof(*op));
-
-	op = mcs.args;
-	op->cmd = MMUEXT_TLB_FLUSH_ALL;
-	MULTI_mmuext_op(mcs.mc, op, 1, NULL, DOMID_SELF);
-
-	xen_mc_issue(PARAVIRT_LAZY_MMU);
-
-	preempt_enable();
-}
-
-#define REMAP_BATCH_SIZE 16
-
-struct remap_data {
-	xen_pfn_t *pfn;
-	bool contiguous;
-	bool no_translate;
-	pgprot_t prot;
-	struct mmu_update *mmu_update;
-};
-
-static int remap_area_pfn_pte_fn(pte_t *ptep, pgtable_t token,
-				 unsigned long addr, void *data)
-{
-	struct remap_data *rmd = data;
-	pte_t pte = pte_mkspecial(mfn_pte(*rmd->pfn, rmd->prot));
-
-	/*
-	 * If we have a contiguous range, just update the pfn itself,
-	 * else update pointer to be "next pfn".
-	 */
-	if (rmd->contiguous)
-		(*rmd->pfn)++;
-	else
-		rmd->pfn++;
-
-	rmd->mmu_update->ptr = virt_to_machine(ptep).maddr;
-	rmd->mmu_update->ptr |= rmd->no_translate ?
-		MMU_PT_UPDATE_NO_TRANSLATE :
-		MMU_NORMAL_PT_UPDATE;
-	rmd->mmu_update->val = pte_val_ma(pte);
-	rmd->mmu_update++;
-
-	return 0;
-}
-
-static int do_remap_pfn(struct vm_area_struct *vma,
-			unsigned long addr,
-			xen_pfn_t *pfn, int nr,
-			int *err_ptr, pgprot_t prot,
-			unsigned int domid,
-			bool no_translate,
-			struct page **pages)
-{
-	int err = 0;
-	struct remap_data rmd;
-	struct mmu_update mmu_update[REMAP_BATCH_SIZE];
-	unsigned long range;
-	int mapped = 0;
-
-	BUG_ON(!((vma->vm_flags & (VM_PFNMAP | VM_IO)) == (VM_PFNMAP | VM_IO)));
-
-	rmd.pfn = pfn;
-	rmd.prot = prot;
-	/*
-	 * We use the err_ptr to indicate if there we are doing a contiguous
-	 * mapping or a discontigious mapping.
-	 */
-	rmd.contiguous = !err_ptr;
-	rmd.no_translate = no_translate;
-
-	while (nr) {
-		int index = 0;
-		int done = 0;
-		int batch = min(REMAP_BATCH_SIZE, nr);
-		int batch_left = batch;
-		range = (unsigned long)batch << PAGE_SHIFT;
-
-		rmd.mmu_update = mmu_update;
-		err = apply_to_page_range(vma->vm_mm, addr, range,
-					  remap_area_pfn_pte_fn, &rmd);
-		if (err)
-			goto out;
-
-		/* We record the error for each page that gives an error, but
-		 * continue mapping until the whole set is done */
-		do {
-			int i;
-
-			err = HYPERVISOR_mmu_update(&mmu_update[index],
-						    batch_left, &done, domid);
-
-			/*
-			 * @err_ptr may be the same buffer as @gfn, so
-			 * only clear it after each chunk of @gfn is
-			 * used.
-			 */
-			if (err_ptr) {
-				for (i = index; i < index + done; i++)
-					err_ptr[i] = 0;
-			}
-			if (err < 0) {
-				if (!err_ptr)
-					goto out;
-				err_ptr[i] = err;
-				done++; /* Skip failed frame. */
-			} else
-				mapped += done;
-			batch_left -= done;
-			index += done;
-		} while (batch_left);
-
-		nr -= batch;
-		addr += range;
-		if (err_ptr)
-			err_ptr += batch;
-		cond_resched();
-	}
-out:
-
-	xen_flush_tlb_all();
-
-	return err < 0 ? err : mapped;
-}
-
-int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
-			       unsigned long addr,
-			       xen_pfn_t gfn, int nr,
-			       pgprot_t prot, unsigned domid,
-			       struct page **pages)
-{
-	if (xen_feature(XENFEAT_auto_translated_physmap))
-		return -EOPNOTSUPP;
-
-	return do_remap_pfn(vma, addr, &gfn, nr, NULL, prot, domid, false,
-			    pages);
-}
-EXPORT_SYMBOL_GPL(xen_remap_domain_gfn_range);
-
-int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
-			       unsigned long addr,
-			       xen_pfn_t *gfn, int nr,
-			       int *err_ptr, pgprot_t prot,
-			       unsigned domid, struct page **pages)
-{
-	if (xen_feature(XENFEAT_auto_translated_physmap))
-		return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr,
-						 prot, domid, pages);
-
-	/* We BUG_ON because it's a programmer error to pass a NULL err_ptr,
-	 * and the consequences later is quite hard to detect what the actual
-	 * cause of "wrong memory was mapped in".
-	 */
-	BUG_ON(err_ptr == NULL);
-	return do_remap_pfn(vma, addr, gfn, nr, err_ptr, prot, domid,
-			    false, pages);
-}
-EXPORT_SYMBOL_GPL(xen_remap_domain_gfn_array);
-
-int xen_remap_domain_mfn_array(struct vm_area_struct *vma,
-			       unsigned long addr,
-			       xen_pfn_t *mfn, int nr,
-			       int *err_ptr, pgprot_t prot,
-			       unsigned int domid, struct page **pages)
-{
-	if (xen_feature(XENFEAT_auto_translated_physmap))
-		return -EOPNOTSUPP;
-
-	return do_remap_pfn(vma, addr, mfn, nr, err_ptr, prot, domid,
-			    true, pages);
-}
-EXPORT_SYMBOL_GPL(xen_remap_domain_mfn_array);
-
 /* Returns: 0 success */
 int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
 			       int nr, struct page **pages)
diff --git a/arch/x86/xen/mmu_hvm.c b/arch/x86/xen/mmu_hvm.c
index dd2ad82eee80..57409373750f 100644
--- a/arch/x86/xen/mmu_hvm.c
+++ b/arch/x86/xen/mmu_hvm.c
@@ -73,7 +73,7 @@ static int is_pagetable_dying_supported(void)
 void __init xen_hvm_init_mmu_ops(void)
 {
 	if (is_pagetable_dying_supported())
-		pv_mmu_ops.exit_mmap = xen_hvm_exit_mmap;
+		pv_ops.mmu.exit_mmap = xen_hvm_exit_mmap;
 #ifdef CONFIG_PROC_VMCORE
 	WARN_ON(register_oldmem_pfn_is_ram(&xen_oldmem_pfn_is_ram));
 #endif
diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c
index dd461c0167ef..70ea598a37d2 100644
--- a/arch/x86/xen/mmu_pv.c
+++ b/arch/x86/xen/mmu_pv.c
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0
+
 /*
  * Xen mmu operations
  *
@@ -99,6 +101,12 @@ static pud_t level3_user_vsyscall[PTRS_PER_PUD] __page_aligned_bss;
 #endif /* CONFIG_X86_64 */
 
 /*
+ * Protects atomic reservation decrease/increase against concurrent increases.
+ * Also protects non-atomic updates of current_pages and balloon lists.
+ */
+static DEFINE_SPINLOCK(xen_reservation_lock);
+
+/*
  * Note about cr3 (pagetable base) values:
  *
  * xen_cr3 contains the current logical cr3 value; it contains the
@@ -2209,7 +2217,7 @@ static void __init xen_write_cr3_init(unsigned long cr3)
 	set_page_prot(initial_page_table, PAGE_KERNEL);
 	set_page_prot(initial_kernel_pmd, PAGE_KERNEL);
 
-	pv_mmu_ops.write_cr3 = &xen_write_cr3;
+	pv_ops.mmu.write_cr3 = &xen_write_cr3;
 }
 
 /*
@@ -2358,27 +2366,27 @@ static void xen_set_fixmap(unsigned idx, phys_addr_t phys, pgprot_t prot)
 
 static void __init xen_post_allocator_init(void)
 {
-	pv_mmu_ops.set_pte = xen_set_pte;
-	pv_mmu_ops.set_pmd = xen_set_pmd;
-	pv_mmu_ops.set_pud = xen_set_pud;
+	pv_ops.mmu.set_pte = xen_set_pte;
+	pv_ops.mmu.set_pmd = xen_set_pmd;
+	pv_ops.mmu.set_pud = xen_set_pud;
 #ifdef CONFIG_X86_64
-	pv_mmu_ops.set_p4d = xen_set_p4d;
+	pv_ops.mmu.set_p4d = xen_set_p4d;
 #endif
 
 	/* This will work as long as patching hasn't happened yet
 	   (which it hasn't) */
-	pv_mmu_ops.alloc_pte = xen_alloc_pte;
-	pv_mmu_ops.alloc_pmd = xen_alloc_pmd;
-	pv_mmu_ops.release_pte = xen_release_pte;
-	pv_mmu_ops.release_pmd = xen_release_pmd;
+	pv_ops.mmu.alloc_pte = xen_alloc_pte;
+	pv_ops.mmu.alloc_pmd = xen_alloc_pmd;
+	pv_ops.mmu.release_pte = xen_release_pte;
+	pv_ops.mmu.release_pmd = xen_release_pmd;
 #ifdef CONFIG_X86_64
-	pv_mmu_ops.alloc_pud = xen_alloc_pud;
-	pv_mmu_ops.release_pud = xen_release_pud;
+	pv_ops.mmu.alloc_pud = xen_alloc_pud;
+	pv_ops.mmu.release_pud = xen_release_pud;
 #endif
-	pv_mmu_ops.make_pte = PV_CALLEE_SAVE(xen_make_pte);
+	pv_ops.mmu.make_pte = PV_CALLEE_SAVE(xen_make_pte);
 
 #ifdef CONFIG_X86_64
-	pv_mmu_ops.write_cr3 = &xen_write_cr3;
+	pv_ops.mmu.write_cr3 = &xen_write_cr3;
 #endif
 }
 
@@ -2466,7 +2474,7 @@ void __init xen_init_mmu_ops(void)
 	x86_init.paging.pagetable_init = xen_pagetable_init;
 	x86_init.hyper.init_after_bootmem = xen_after_bootmem;
 
-	pv_mmu_ops = xen_mmu_ops;
+	pv_ops.mmu = xen_mmu_ops;
 
 	memset(dummy_mapping, 0xff, PAGE_SIZE);
 }
@@ -2666,6 +2674,138 @@ void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order)
 }
 EXPORT_SYMBOL_GPL(xen_destroy_contiguous_region);
 
+static noinline void xen_flush_tlb_all(void)
+{
+	struct mmuext_op *op;
+	struct multicall_space mcs;
+
+	preempt_disable();
+
+	mcs = xen_mc_entry(sizeof(*op));
+
+	op = mcs.args;
+	op->cmd = MMUEXT_TLB_FLUSH_ALL;
+	MULTI_mmuext_op(mcs.mc, op, 1, NULL, DOMID_SELF);
+
+	xen_mc_issue(PARAVIRT_LAZY_MMU);
+
+	preempt_enable();
+}
+
+#define REMAP_BATCH_SIZE 16
+
+struct remap_data {
+	xen_pfn_t *pfn;
+	bool contiguous;
+	bool no_translate;
+	pgprot_t prot;
+	struct mmu_update *mmu_update;
+};
+
+static int remap_area_pfn_pte_fn(pte_t *ptep, pgtable_t token,
+				 unsigned long addr, void *data)
+{
+	struct remap_data *rmd = data;
+	pte_t pte = pte_mkspecial(mfn_pte(*rmd->pfn, rmd->prot));
+
+	/*
+	 * If we have a contiguous range, just update the pfn itself,
+	 * else update pointer to be "next pfn".
+	 */
+	if (rmd->contiguous)
+		(*rmd->pfn)++;
+	else
+		rmd->pfn++;
+
+	rmd->mmu_update->ptr = virt_to_machine(ptep).maddr;
+	rmd->mmu_update->ptr |= rmd->no_translate ?
+		MMU_PT_UPDATE_NO_TRANSLATE :
+		MMU_NORMAL_PT_UPDATE;
+	rmd->mmu_update->val = pte_val_ma(pte);
+	rmd->mmu_update++;
+
+	return 0;
+}
+
+int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr,
+		  xen_pfn_t *pfn, int nr, int *err_ptr, pgprot_t prot,
+		  unsigned int domid, bool no_translate, struct page **pages)
+{
+	int err = 0;
+	struct remap_data rmd;
+	struct mmu_update mmu_update[REMAP_BATCH_SIZE];
+	unsigned long range;
+	int mapped = 0;
+
+	BUG_ON(!((vma->vm_flags & (VM_PFNMAP | VM_IO)) == (VM_PFNMAP | VM_IO)));
+
+	rmd.pfn = pfn;
+	rmd.prot = prot;
+	/*
+	 * We use the err_ptr to indicate if there we are doing a contiguous
+	 * mapping or a discontigious mapping.
+	 */
+	rmd.contiguous = !err_ptr;
+	rmd.no_translate = no_translate;
+
+	while (nr) {
+		int index = 0;
+		int done = 0;
+		int batch = min(REMAP_BATCH_SIZE, nr);
+		int batch_left = batch;
+
+		range = (unsigned long)batch << PAGE_SHIFT;
+
+		rmd.mmu_update = mmu_update;
+		err = apply_to_page_range(vma->vm_mm, addr, range,
+					  remap_area_pfn_pte_fn, &rmd);
+		if (err)
+			goto out;
+
+		/*
+		 * We record the error for each page that gives an error, but
+		 * continue mapping until the whole set is done
+		 */
+		do {
+			int i;
+
+			err = HYPERVISOR_mmu_update(&mmu_update[index],
+						    batch_left, &done, domid);
+
+			/*
+			 * @err_ptr may be the same buffer as @gfn, so
+			 * only clear it after each chunk of @gfn is
+			 * used.
+			 */
+			if (err_ptr) {
+				for (i = index; i < index + done; i++)
+					err_ptr[i] = 0;
+			}
+			if (err < 0) {
+				if (!err_ptr)
+					goto out;
+				err_ptr[i] = err;
+				done++; /* Skip failed frame. */
+			} else
+				mapped += done;
+			batch_left -= done;
+			index += done;
+		} while (batch_left);
+
+		nr -= batch;
+		addr += range;
+		if (err_ptr)
+			err_ptr += batch;
+		cond_resched();
+	}
+out:
+
+	xen_flush_tlb_all();
+
+	return err < 0 ? err : mapped;
+}
+EXPORT_SYMBOL_GPL(xen_remap_pfn);
+
 #ifdef CONFIG_KEXEC_CORE
 phys_addr_t paddr_vmcoreinfo_note(void)
 {
diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c
index 159a897151d6..d6d74efd8912 100644
--- a/arch/x86/xen/p2m.c
+++ b/arch/x86/xen/p2m.c
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0
+
 /*
  * Xen leaves the responsibility for maintaining p2m mappings to the
  * guests themselves, but it must also access and update the p2m array
diff --git a/arch/x86/xen/pci-swiotlb-xen.c b/arch/x86/xen/pci-swiotlb-xen.c
index 37c6056a7bba..33293ce01d8d 100644
--- a/arch/x86/xen/pci-swiotlb-xen.c
+++ b/arch/x86/xen/pci-swiotlb-xen.c
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0
+
 /* Glue code to lib/swiotlb-xen.c */
 
 #include <linux/dma-mapping.h>
diff --git a/arch/x86/xen/platform-pci-unplug.c b/arch/x86/xen/platform-pci-unplug.c
index b99585034dd2..66ab96a4e2b3 100644
--- a/arch/x86/xen/platform-pci-unplug.c
+++ b/arch/x86/xen/platform-pci-unplug.c
@@ -1,22 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
+
 /******************************************************************************
  * platform-pci-unplug.c
  *
  * Xen platform PCI device driver
  * Copyright (c) 2010, Citrix
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope 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, write to the Free Software Foundation, Inc., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307 USA.
- *
  */
 
 #include <linux/init.h>
@@ -31,7 +19,6 @@
 #define XEN_PLATFORM_ERR_PROTOCOL -2
 #define XEN_PLATFORM_ERR_BLACKLIST -3
 
-#ifdef CONFIG_XEN_PVHVM
 /* store the value of xen_emul_unplug after the unplug is done */
 static int xen_platform_pci_unplug;
 static int xen_emul_unplug;
@@ -215,4 +202,3 @@ static int __init parse_xen_emul_unplug(char *arg)
 	return 0;
 }
 early_param("xen_emul_unplug", parse_xen_emul_unplug);
-#endif
diff --git a/arch/x86/xen/spinlock.c b/arch/x86/xen/spinlock.c
index 973f10e05211..23f6793af88a 100644
--- a/arch/x86/xen/spinlock.c
+++ b/arch/x86/xen/spinlock.c
@@ -141,11 +141,12 @@ void __init xen_init_spinlocks(void)
 	printk(KERN_DEBUG "xen: PV spinlocks enabled\n");
 
 	__pv_init_lock_hash();
-	pv_lock_ops.queued_spin_lock_slowpath = __pv_queued_spin_lock_slowpath;
-	pv_lock_ops.queued_spin_unlock = PV_CALLEE_SAVE(__pv_queued_spin_unlock);
-	pv_lock_ops.wait = xen_qlock_wait;
-	pv_lock_ops.kick = xen_qlock_kick;
-	pv_lock_ops.vcpu_is_preempted = PV_CALLEE_SAVE(xen_vcpu_stolen);
+	pv_ops.lock.queued_spin_lock_slowpath = __pv_queued_spin_lock_slowpath;
+	pv_ops.lock.queued_spin_unlock =
+		PV_CALLEE_SAVE(__pv_queued_spin_unlock);
+	pv_ops.lock.wait = xen_qlock_wait;
+	pv_ops.lock.kick = xen_qlock_kick;
+	pv_ops.lock.vcpu_is_preempted = PV_CALLEE_SAVE(xen_vcpu_stolen);
 }
 
 static __init int xen_parse_nopvspin(char *arg)
diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index c84f1e039d84..72bf446c3fee 100644
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -513,7 +513,7 @@ static void __init xen_time_init(void)
 void __init xen_init_time_ops(void)
 {
 	xen_sched_clock_offset = xen_clocksource_read();
-	pv_time_ops = xen_time_ops;
+	pv_ops.time = xen_time_ops;
 
 	x86_init.timers.timer_init = xen_time_init;
 	x86_init.timers.setup_percpu_clockev = x86_init_noop;
@@ -555,7 +555,7 @@ void __init xen_hvm_init_time_ops(void)
 	}
 
 	xen_sched_clock_offset = xen_clocksource_read();
-	pv_time_ops = xen_time_ops;
+	pv_ops.time = xen_time_ops;
 	x86_init.timers.setup_percpu_clockev = xen_time_init;
 	x86_cpuinit.setup_percpu_clockev = xen_hvm_setup_cpu_clockevents;
 
diff --git a/arch/x86/xen/vdso.h b/arch/x86/xen/vdso.h
index 861fedfe5230..873c54c488fe 100644
--- a/arch/x86/xen/vdso.h
+++ b/arch/x86/xen/vdso.h
@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
 /* Bit used for the pseudo-hwcap for non-negative segments.  We use
    bit 1 to avoid bugs in some versions of glibc when bit 0 is
    used; the choice is otherwise arbitrary. */
diff --git a/arch/x86/xen/xen-pvh.S b/arch/x86/xen/xen-pvh.S
index ca2d3b2bf2af..b0e471506cd8 100644
--- a/arch/x86/xen/xen-pvh.S
+++ b/arch/x86/xen/xen-pvh.S
@@ -1,18 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
 /*
  * Copyright C 2016, Oracle and/or its affiliates. All rights reserved.
- *
- * 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/>.
  */
 
 	.code32