Merge branches 'upstream/xenfs' and 'upstream/core' of git://git.kern…

…el.org/pub/scm/linux/kernel/git/jeremy/xen

* 'upstream/xenfs' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen:
  xen/privcmd: make privcmd visible in domU
  xen/privcmd: move remap_domain_mfn_range() to core xen code and export.
  privcmd: MMAPBATCH: Fix error handling/reporting
  xenbus: export xen_store_interface for xenfs
  xen/privcmd: make sure vma is ours before doing anything to it
  xen/privcmd: print SIGBUS faults
  xen/xenfs: set_page_dirty is supposed to return true if it dirties
  xen/privcmd: create address space to allow writable mmaps
  xen: add privcmd driver
  xen: add variable hypercall caller
  xen: add xen_set_domain_pte()
  xen: add /proc/xen/xsd_{kva,port} to xenfs

* 'upstream/core' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen: (29 commits)
  xen: include xen/xen.h for definition of xen_initial_domain()
  xen: use host E820 map for dom0
  xen: correctly rebuild mfn list list after migration.
  xen: improvements to VIRQ_DEBUG output
  xen: set up IRQ before binding virq to evtchn
  xen: ensure that all event channels start off bound to VCPU 0
  xen/hvc: only notify if we actually sent something
  xen: don't add extra_pages for RAM after mem_end
  xen: add support for PAT
  xen: make sure xen_max_p2m_pfn is up to date
  xen: limit extra memory to a certain ratio of base
  xen: add extra pages for E820 RAM regions, even if beyond mem_end
  xen: make sure xen_extra_mem_start is beyond all non-RAM e820
  xen: implement "extra" memory to reserve space for pages not present at boot
  xen: Use host-provided E820 map
  xen: don't map missing memory
  xen: defer building p2m mfn structures until kernel is mapped
  xen: add return value to set_phys_to_machine()
  xen: convert p2m to a 3 level tree
  xen: make install_p2mtop_page() static
  ...

Fix up trivial conflict in arch/x86/xen/mmu.c, and fix the use of
'reserve_early()' - in the new memblock world order it is now
'memblock_x86_reserve_range()' instead. Pointed out by Jeremy.

arch/x86/include/asm/xen/hypercall.h

@@ -200,6 +200,23 @@ extern struct { char _entry[32]; } hypercall_page[];
 	(type)__res;							\
 })
 
+static inline long
+privcmd_call(unsigned call,
+	     unsigned long a1, unsigned long a2,
+	     unsigned long a3, unsigned long a4,
+	     unsigned long a5)
+{
+	__HYPERCALL_DECLS;
+	__HYPERCALL_5ARG(a1, a2, a3, a4, a5);
+
+	asm volatile("call *%[call]"
+		     : __HYPERCALL_5PARAM
+		     : [call] "a" (&hypercall_page[call])
+		     : __HYPERCALL_CLOBBER5);
+
+	return (long)__res;
+}
+
 static inline int
 HYPERVISOR_set_trap_table(struct trap_info *table)
 {

arch/x86/include/asm/xen/page.h

@@ -37,14 +37,21 @@ typedef struct xpaddr {
 
 
 extern unsigned long get_phys_to_machine(unsigned long pfn);
-extern void set_phys_to_machine(unsigned long pfn, unsigned long mfn);
+extern bool set_phys_to_machine(unsigned long pfn, unsigned long mfn);
 
 static inline unsigned long pfn_to_mfn(unsigned long pfn)
 {
+	unsigned long mfn;
+
 	if (xen_feature(XENFEAT_auto_translated_physmap))
 		return pfn;
 
-	return get_phys_to_machine(pfn) & ~FOREIGN_FRAME_BIT;
+	mfn = get_phys_to_machine(pfn);
+
+	if (mfn != INVALID_P2M_ENTRY)
+		mfn &= ~FOREIGN_FRAME_BIT;
+
+	return mfn;
 }
 
 static inline int phys_to_machine_mapping_valid(unsigned long pfn)
@@ -159,6 +166,7 @@ static inline pte_t __pte_ma(pteval_t x)
 
 #define pgd_val_ma(x)	((x).pgd)
 
+void xen_set_domain_pte(pte_t *ptep, pte_t pteval, unsigned domid);
 
 xmaddr_t arbitrary_virt_to_machine(void *address);
 unsigned long arbitrary_virt_to_mfn(void *vaddr);

arch/x86/xen/Kconfig

@@ -19,15 +19,12 @@ config XEN_PVHVM
 	depends on X86_LOCAL_APIC
 
 config XEN_MAX_DOMAIN_MEMORY
-       int "Maximum allowed size of a domain in gigabytes"
-       default 8 if X86_32
-       default 32 if X86_64
+       int
+       default 128
        depends on XEN
        help
-         The pseudo-physical to machine address array is sized
-         according to the maximum possible memory size of a Xen
-         domain.  This array uses 1 page per gigabyte, so there's no
-         need to be too stingy here.
+         This only affects the sizing of some bss arrays, the unused
+         portions of which are freed.
 
 config XEN_SAVE_RESTORE
        bool

arch/x86/xen/enlighten.c

@@ -136,9 +136,6 @@ static void xen_vcpu_setup(int cpu)
 	info.mfn = arbitrary_virt_to_mfn(vcpup);
 	info.offset = offset_in_page(vcpup);
 
-	printk(KERN_DEBUG "trying to map vcpu_info %d at %p, mfn %llx, offset %d\n",
-	       cpu, vcpup, info.mfn, info.offset);
-
 	/* Check to see if the hypervisor will put the vcpu_info
 	   structure where we want it, which allows direct access via
 	   a percpu-variable. */
@@ -152,9 +149,6 @@ static void xen_vcpu_setup(int cpu)
 		/* This cpu is using the registered vcpu info, even if
 		   later ones fail to. */
 		per_cpu(xen_vcpu, cpu) = vcpup;
-
-		printk(KERN_DEBUG "cpu %d using vcpu_info at %p\n",
-		       cpu, vcpup);
 	}
 }
 
@@ -836,6 +830,11 @@ static int xen_write_msr_safe(unsigned int msr, unsigned low, unsigned high)
 		   Xen console noise. */
 		break;
 
+	case MSR_IA32_CR_PAT:
+		if (smp_processor_id() == 0)
+			xen_set_pat(((u64)high << 32) | low);
+		break;
+
 	default:
 		ret = native_write_msr_safe(msr, low, high);
 	}
@@ -874,8 +873,6 @@ void xen_setup_vcpu_info_placement(void)
 	/* xen_vcpu_setup managed to place the vcpu_info within the
 	   percpu area for all cpus, so make use of it */
 	if (have_vcpu_info_placement) {
-		printk(KERN_INFO "Xen: using vcpu_info placement\n");
-
 		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);
@@ -1189,6 +1186,9 @@ asmlinkage void __init xen_start_kernel(void)
 	xen_raw_console_write("mapping kernel into physical memory\n");
 	pgd = xen_setup_kernel_pagetable(pgd, xen_start_info->nr_pages);
 
+	/* Allocate and initialize top and mid mfn levels for p2m structure */
+	xen_build_mfn_list_list();
+
 	init_mm.pgd = pgd;
 
 	/* keep using Xen gdt for now; no urgent need to change it */