Merge branch 'linus' into x86/urgent

Merge reason: Merge upstream commits to avoid conflicts in upcoming patches.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

3 files changed, 52 insertions, 18 deletions

diff --git a/arch/x86/include/asm/xen/hypercall.h b/arch/x86/include/asm/xen/hypercall.h
index a3c28ae4025..8508bfe5229 100644
--- a/arch/x86/include/asm/xen/hypercall.h
+++ b/arch/x86/include/asm/xen/hypercall.h
@@ -287,7 +287,7 @@ HYPERVISOR_fpu_taskswitch(int set)
 static inline int
 HYPERVISOR_sched_op(int cmd, void *arg)
 {
-	return _hypercall2(int, sched_op_new, cmd, arg);
+	return _hypercall2(int, sched_op, cmd, arg);
 }
 
 static inline long
@@ -422,10 +422,17 @@ HYPERVISOR_set_segment_base(int reg, unsigned long value)
 #endif
 
 static inline int
-HYPERVISOR_suspend(unsigned long srec)
+HYPERVISOR_suspend(unsigned long start_info_mfn)
 {
-	return _hypercall3(int, sched_op, SCHEDOP_shutdown,
-			   SHUTDOWN_suspend, srec);
+	struct sched_shutdown r = { .reason = SHUTDOWN_suspend };
+
+	/*
+	 * For a PV guest the tools require that the start_info mfn be
+	 * present in rdx/edx when the hypercall is made. Per the
+	 * hypercall calling convention this is the third hypercall
+	 * argument, which is start_info_mfn here.
+	 */
+	return _hypercall3(int, sched_op, SCHEDOP_shutdown, &r, start_info_mfn);
 }
 
 static inline int
diff --git a/arch/x86/include/asm/xen/page.h b/arch/x86/include/asm/xen/page.h
index f25bdf238a3..c61934fbf22 100644
--- a/arch/x86/include/asm/xen/page.h
+++ b/arch/x86/include/asm/xen/page.h
@@ -29,8 +29,10 @@ typedef struct xpaddr {
 
 /**** MACHINE <-> PHYSICAL CONVERSION MACROS ****/
 #define INVALID_P2M_ENTRY	(~0UL)
-#define FOREIGN_FRAME_BIT	(1UL<<31)
+#define FOREIGN_FRAME_BIT	(1UL<<(BITS_PER_LONG-1))
+#define IDENTITY_FRAME_BIT	(1UL<<(BITS_PER_LONG-2))
 #define FOREIGN_FRAME(m)	((m) | FOREIGN_FRAME_BIT)
+#define IDENTITY_FRAME(m)	((m) | IDENTITY_FRAME_BIT)
 
 /* Maximum amount of memory we can handle in a domain in pages */
 #define MAX_DOMAIN_PAGES						\
@@ -41,12 +43,18 @@ extern unsigned int   machine_to_phys_order;
 
 extern unsigned long get_phys_to_machine(unsigned long pfn);
 extern bool set_phys_to_machine(unsigned long pfn, unsigned long mfn);
+extern bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);
+extern unsigned long set_phys_range_identity(unsigned long pfn_s,
+					     unsigned long pfn_e);
 
 extern int m2p_add_override(unsigned long mfn, struct page *page);
 extern int m2p_remove_override(struct page *page);
 extern struct page *m2p_find_override(unsigned long mfn);
 extern unsigned long m2p_find_override_pfn(unsigned long mfn, unsigned long pfn);
 
+#ifdef CONFIG_XEN_DEBUG_FS
+extern int p2m_dump_show(struct seq_file *m, void *v);
+#endif
 static inline unsigned long pfn_to_mfn(unsigned long pfn)
 {
 	unsigned long mfn;
@@ -57,7 +65,7 @@ static inline unsigned long pfn_to_mfn(unsigned long pfn)
 	mfn = get_phys_to_machine(pfn);
 
 	if (mfn != INVALID_P2M_ENTRY)
-		mfn &= ~FOREIGN_FRAME_BIT;
+		mfn &= ~(FOREIGN_FRAME_BIT | IDENTITY_FRAME_BIT);
 
 	return mfn;
 }
@@ -73,25 +81,44 @@ static inline int phys_to_machine_mapping_valid(unsigned long pfn)
 static inline unsigned long mfn_to_pfn(unsigned long mfn)
 {
 	unsigned long pfn;
+	int ret = 0;
 
 	if (xen_feature(XENFEAT_auto_translated_physmap))
 		return mfn;
 
+	if (unlikely((mfn >> machine_to_phys_order) != 0)) {
+		pfn = ~0;
+		goto try_override;
+	}
 	pfn = 0;
 	/*
 	 * The array access can fail (e.g., device space beyond end of RAM).
 	 * In such cases it doesn't matter what we return (we return garbage),
 	 * but we must handle the fault without crashing!
 	 */
-	__get_user(pfn, &machine_to_phys_mapping[mfn]);
-
-	/*
-	 * If this appears to be a foreign mfn (because the pfn
-	 * doesn't map back to the mfn), then check the local override
-	 * table to see if there's a better pfn to use.
+	ret = __get_user(pfn, &machine_to_phys_mapping[mfn]);
+try_override:
+	/* ret might be < 0 if there are no entries in the m2p for mfn */
+	if (ret < 0)
+		pfn = ~0;
+	else if (get_phys_to_machine(pfn) != mfn)
+		/*
+		 * If this appears to be a foreign mfn (because the pfn
+		 * doesn't map back to the mfn), then check the local override
+		 * table to see if there's a better pfn to use.
+		 *
+		 * m2p_find_override_pfn returns ~0 if it doesn't find anything.
+		 */
+		pfn = m2p_find_override_pfn(mfn, ~0);
+
+	/* 
+	 * pfn is ~0 if there are no entries in the m2p for mfn or if the
+	 * entry doesn't map back to the mfn and m2p_override doesn't have a
+	 * valid entry for it.
 	 */
-	if (get_phys_to_machine(pfn) != mfn)
-		pfn = m2p_find_override_pfn(mfn, pfn);
+	if (pfn == ~0 &&
+			get_phys_to_machine(mfn) == IDENTITY_FRAME(mfn))
+		pfn = mfn;
 
 	return pfn;
 }
diff --git a/arch/x86/include/asm/xen/pci.h b/arch/x86/include/asm/xen/pci.h
index 2329b3eaf8d..aa862098916 100644
--- a/arch/x86/include/asm/xen/pci.h
+++ b/arch/x86/include/asm/xen/pci.h
@@ -27,16 +27,16 @@ static inline void __init xen_setup_pirqs(void)
  * its own functions.
  */
 struct xen_pci_frontend_ops {
-	int (*enable_msi)(struct pci_dev *dev, int **vectors);
+	int (*enable_msi)(struct pci_dev *dev, int vectors[]);
 	void (*disable_msi)(struct pci_dev *dev);
-	int (*enable_msix)(struct pci_dev *dev, int **vectors, int nvec);
+	int (*enable_msix)(struct pci_dev *dev, int vectors[], int nvec);
 	void (*disable_msix)(struct pci_dev *dev);
 };
 
 extern struct xen_pci_frontend_ops *xen_pci_frontend;
 
 static inline int xen_pci_frontend_enable_msi(struct pci_dev *dev,
-					      int **vectors)
+					      int vectors[])
 {
 	if (xen_pci_frontend && xen_pci_frontend->enable_msi)
 		return xen_pci_frontend->enable_msi(dev, vectors);
@@ -48,7 +48,7 @@ static inline void xen_pci_frontend_disable_msi(struct pci_dev *dev)
 			xen_pci_frontend->disable_msi(dev);
 }
 static inline int xen_pci_frontend_enable_msix(struct pci_dev *dev,
-					       int **vectors, int nvec)
+					       int vectors[], int nvec)
 {
 	if (xen_pci_frontend && xen_pci_frontend->enable_msix)
 		return xen_pci_frontend->enable_msix(dev, vectors, nvec);