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

1 files changed, 38 insertions, 44 deletions

diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h
index 83ce282eed0a..fba54ca23b2a 100644
--- a/arch/x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -66,12 +66,14 @@ struct paravirt_callee_save {
 
 /* general info */
 struct pv_info {
+#ifdef CONFIG_PARAVIRT_XXL
 	unsigned int kernel_rpl;
 	int shared_kernel_pmd;
 
 #ifdef CONFIG_X86_64
 	u16 extra_user_64bit_cs;  /* __USER_CS if none */
 #endif
+#endif
 
 	const char *name;
 };
@@ -85,17 +87,18 @@ struct pv_init_ops {
 	 * the number of bytes of code generated, as we nop pad the
 	 * rest in generic code.
 	 */
-	unsigned (*patch)(u8 type, u16 clobber, void *insnbuf,
+	unsigned (*patch)(u8 type, void *insnbuf,
 			  unsigned long addr, unsigned len);
 } __no_randomize_layout;
 
-
+#ifdef CONFIG_PARAVIRT_XXL
 struct pv_lazy_ops {
 	/* Set deferred update mode, used for batching operations. */
 	void (*enter)(void);
 	void (*leave)(void);
 	void (*flush)(void);
 } __no_randomize_layout;
+#endif
 
 struct pv_time_ops {
 	unsigned long long (*sched_clock)(void);
@@ -104,6 +107,9 @@ struct pv_time_ops {
 
 struct pv_cpu_ops {
 	/* hooks for various privileged instructions */
+	void (*io_delay)(void);
+
+#ifdef CONFIG_PARAVIRT_XXL
 	unsigned long (*get_debugreg)(int regno);
 	void (*set_debugreg)(int regno, unsigned long value);
 
@@ -141,7 +147,6 @@ struct pv_cpu_ops {
 	void (*set_iopl_mask)(unsigned mask);
 
 	void (*wbinvd)(void);
-	void (*io_delay)(void);
 
 	/* cpuid emulation, mostly so that caps bits can be disabled */
 	void (*cpuid)(unsigned int *eax, unsigned int *ebx,
@@ -176,9 +181,11 @@ struct pv_cpu_ops {
 
 	void (*start_context_switch)(struct task_struct *prev);
 	void (*end_context_switch)(struct task_struct *next);
+#endif
 } __no_randomize_layout;
 
 struct pv_irq_ops {
+#ifdef CONFIG_PARAVIRT_XXL
 	/*
 	 * Get/set interrupt state.  save_fl and restore_fl are only
 	 * expected to use X86_EFLAGS_IF; all other bits
@@ -195,35 +202,34 @@ struct pv_irq_ops {
 
 	void (*safe_halt)(void);
 	void (*halt)(void);
-
+#endif
 } __no_randomize_layout;
 
 struct pv_mmu_ops {
+	/* TLB operations */
+	void (*flush_tlb_user)(void);
+	void (*flush_tlb_kernel)(void);
+	void (*flush_tlb_one_user)(unsigned long addr);
+	void (*flush_tlb_others)(const struct cpumask *cpus,
+				 const struct flush_tlb_info *info);
+
+	void (*tlb_remove_table)(struct mmu_gather *tlb, void *table);
+
+	/* Hook for intercepting the destruction of an mm_struct. */
+	void (*exit_mmap)(struct mm_struct *mm);
+
+#ifdef CONFIG_PARAVIRT_XXL
 	unsigned long (*read_cr2)(void);
 	void (*write_cr2)(unsigned long);
 
 	unsigned long (*read_cr3)(void);
 	void (*write_cr3)(unsigned long);
 
-	/*
-	 * Hooks for intercepting the creation/use/destruction of an
-	 * mm_struct.
-	 */
+	/* Hooks for intercepting the creation/use of an mm_struct. */
 	void (*activate_mm)(struct mm_struct *prev,
 			    struct mm_struct *next);
 	void (*dup_mmap)(struct mm_struct *oldmm,
 			 struct mm_struct *mm);
-	void (*exit_mmap)(struct mm_struct *mm);
-
-
-	/* TLB operations */
-	void (*flush_tlb_user)(void);
-	void (*flush_tlb_kernel)(void);
-	void (*flush_tlb_one_user)(unsigned long addr);
-	void (*flush_tlb_others)(const struct cpumask *cpus,
-				 const struct flush_tlb_info *info);
-
-	void (*tlb_remove_table)(struct mmu_gather *tlb, void *table);
 
 	/* Hooks for allocating and freeing a pagetable top-level */
 	int  (*pgd_alloc)(struct mm_struct *mm);
@@ -298,6 +304,7 @@ struct pv_mmu_ops {
 	   an mfn.  We can tell which is which from the index. */
 	void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx,
 			   phys_addr_t phys, pgprot_t flags);
+#endif
 } __no_randomize_layout;
 
 struct arch_spinlock;
@@ -321,28 +328,23 @@ struct pv_lock_ops {
  * number for each function using the offset which we use to indicate
  * what to patch. */
 struct paravirt_patch_template {
-	struct pv_init_ops pv_init_ops;
-	struct pv_time_ops pv_time_ops;
-	struct pv_cpu_ops pv_cpu_ops;
-	struct pv_irq_ops pv_irq_ops;
-	struct pv_mmu_ops pv_mmu_ops;
-	struct pv_lock_ops pv_lock_ops;
+	struct pv_init_ops	init;
+	struct pv_time_ops	time;
+	struct pv_cpu_ops	cpu;
+	struct pv_irq_ops	irq;
+	struct pv_mmu_ops	mmu;
+	struct pv_lock_ops	lock;
 } __no_randomize_layout;
 
 extern struct pv_info pv_info;
-extern struct pv_init_ops pv_init_ops;
-extern struct pv_time_ops pv_time_ops;
-extern struct pv_cpu_ops pv_cpu_ops;
-extern struct pv_irq_ops pv_irq_ops;
-extern struct pv_mmu_ops pv_mmu_ops;
-extern struct pv_lock_ops pv_lock_ops;
+extern struct paravirt_patch_template pv_ops;
 
 #define PARAVIRT_PATCH(x)					\
 	(offsetof(struct paravirt_patch_template, x) / sizeof(void *))
 
 #define paravirt_type(op)				\
 	[paravirt_typenum] "i" (PARAVIRT_PATCH(op)),	\
-	[paravirt_opptr] "i" (&(op))
+	[paravirt_opptr] "i" (&(pv_ops.op))
 #define paravirt_clobber(clobber)		\
 	[paravirt_clobber] "i" (clobber)
 
@@ -361,20 +363,13 @@ extern struct pv_lock_ops pv_lock_ops;
 
 unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len);
 unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len);
-unsigned paravirt_patch_call(void *insnbuf,
-			     const void *target, u16 tgt_clobbers,
-			     unsigned long addr, u16 site_clobbers,
-			     unsigned len);
-unsigned paravirt_patch_jmp(void *insnbuf, const void *target,
-			    unsigned long addr, unsigned len);
-unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
+unsigned paravirt_patch_default(u8 type, void *insnbuf,
 				unsigned long addr, unsigned len);
 
 unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
 			      const char *start, const char *end);
 
-unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
-		      unsigned long addr, unsigned len);
+unsigned native_patch(u8 type, void *ibuf, unsigned long addr, unsigned len);
 
 int paravirt_disable_iospace(void);
 
@@ -488,9 +483,9 @@ int paravirt_disable_iospace(void);
 #endif	/* CONFIG_X86_32 */
 
 #ifdef CONFIG_PARAVIRT_DEBUG
-#define PVOP_TEST_NULL(op)	BUG_ON(op == NULL)
+#define PVOP_TEST_NULL(op)	BUG_ON(pv_ops.op == NULL)
 #else
-#define PVOP_TEST_NULL(op)	((void)op)
+#define PVOP_TEST_NULL(op)	((void)pv_ops.op)
 #endif
 
 #define PVOP_RETMASK(rettype)						\
@@ -666,7 +661,6 @@ struct paravirt_patch_site {
 	u8 *instr; 		/* original instructions */
 	u8 instrtype;		/* type of this instruction */
 	u8 len;			/* length of original instruction */
-	u16 clobbers;		/* what registers you may clobber */
 };
 
 extern struct paravirt_patch_site __parainstructions[],