x86/xen: eliminate some private header files

Under arch/x86/xen there is one large private header file xen-ops.h
containing most of the Xen-private x86 related declarations, and then
there are several small headers with a handful of declarations each.

Merge the small headers into xen-ops.h.

While doing that, move the declaration of xen_fifo_events from
xen-ops.h into include/xen/events.h where it should have been from the
beginning.
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Message-ID: <20240710093718.14552-3-jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>

arch/x86/xen/apic.c

@@ -10,8 +10,6 @@
 #include <xen/xen.h>
 #include <xen/interface/physdev.h>
 #include "xen-ops.h"
-#include "pmu.h"
-#include "smp.h"
 
 static unsigned int xen_io_apic_read(unsigned apic, unsigned reg)
 {

arch/x86/xen/debugfs.c

@@ -3,7 +3,7 @@
 #include <linux/debugfs.h>
 #include <linux/slab.h>
 
-#include "debugfs.h"
+#include "xen-ops.h"
 
 static struct dentry *d_xen_debug;
 

arch/x86/xen/debugfs.h

-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _XEN_DEBUGFS_H
-#define _XEN_DEBUGFS_H
-
-struct dentry * __init xen_init_debugfs(void);
-
-#endif /* _XEN_DEBUGFS_H */

arch/x86/xen/enlighten.c

@@ -20,8 +20,6 @@
 #include <asm/setup.h>
 
 #include "xen-ops.h"
-#include "smp.h"
-#include "pmu.h"
 
 EXPORT_SYMBOL_GPL(hypercall_page);
 

arch/x86/xen/enlighten_hvm.c

@@ -28,8 +28,6 @@
 #include <asm/xen/page.h>
 
 #include "xen-ops.h"
-#include "mmu.h"
-#include "smp.h"
 
 static unsigned long shared_info_pfn;
 

arch/x86/xen/enlighten_pv.c

@@ -85,10 +85,6 @@
 #endif
 
 #include "xen-ops.h"
-#include "mmu.h"
-#include "smp.h"
-#include "multicalls.h"
-#include "pmu.h"
 
 #include "../kernel/cpu/cpu.h" /* get_cpu_cap() */
 

arch/x86/xen/mmu.c

@@ -5,8 +5,7 @@
 #include <asm/xen/hypercall.h>
 #include <xen/interface/memory.h>
 
-#include "multicalls.h"
-#include "mmu.h"
+#include "xen-ops.h"
 
 unsigned long arbitrary_virt_to_mfn(void *vaddr)
 {

arch/x86/xen/mmu.h

-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _XEN_MMU_H
-
-#include <linux/linkage.h>
-#include <asm/page.h>
-
-enum pt_level {
-	PT_PGD,
-	PT_P4D,
-	PT_PUD,
-	PT_PMD,
-	PT_PTE
-};
-
-
-bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);
-
-void set_pte_mfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags);
-
-unsigned long xen_read_cr2_direct(void);
-
-extern void xen_init_mmu_ops(void);
-extern void xen_hvm_init_mmu_ops(void);
-#endif	/* _XEN_MMU_H */

arch/x86/xen/mmu_hvm.c

@@ -5,7 +5,7 @@
 #include <xen/interface/xen.h>
 #include <xen/hvm.h>
 
-#include "mmu.h"
+#include "xen-ops.h"
 
 #ifdef CONFIG_PROC_VMCORE
 /*

arch/x86/xen/mmu_pv.c

@@ -82,9 +82,7 @@
 #include <xen/hvc-console.h>
 #include <xen/swiotlb-xen.h>
 
-#include "multicalls.h"
-#include "mmu.h"
-#include "debugfs.h"
+#include "xen-ops.h"
 
 /*
  * Prototypes for functions called via PV_CALLEE_SAVE_REGS_THUNK() in order

arch/x86/xen/multicalls.c

@@ -28,8 +28,7 @@
 
 #include <asm/xen/hypercall.h>
 
-#include "multicalls.h"
-#include "debugfs.h"
+#include "xen-ops.h"
 
 #define MC_BATCH	32
 

arch/x86/xen/multicalls.h

-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _XEN_MULTICALLS_H
-#define _XEN_MULTICALLS_H
-
-#include <trace/events/xen.h>
-
-#include "xen-ops.h"
-
-/* Multicalls */
-struct multicall_space
-{
-	struct multicall_entry *mc;
-	void *args;
-};
-
-/* Allocate room for a multicall and its args */
-struct multicall_space __xen_mc_entry(size_t args);
-
-DECLARE_PER_CPU(unsigned long, xen_mc_irq_flags);
-
-/* Call to start a batch of multiple __xen_mc_entry()s.  Must be
-   paired with xen_mc_issue() */
-static inline void xen_mc_batch(void)
-{
-	unsigned long flags;
-
-	/* need to disable interrupts until this entry is complete */
-	local_irq_save(flags);
-	trace_xen_mc_batch(xen_get_lazy_mode());
-	__this_cpu_write(xen_mc_irq_flags, flags);
-}
-
-static inline struct multicall_space xen_mc_entry(size_t args)
-{
-	xen_mc_batch();
-	return __xen_mc_entry(args);
-}
-
-/* Flush all pending multicalls */
-void xen_mc_flush(void);
-
-/* Issue a multicall if we're not in a lazy mode */
-static inline void xen_mc_issue(unsigned mode)
-{
-	trace_xen_mc_issue(mode);
-
-	if ((xen_get_lazy_mode() & mode) == 0)
-		xen_mc_flush();
-
-	/* restore flags saved in xen_mc_batch */
-	local_irq_restore(this_cpu_read(xen_mc_irq_flags));
-}
-
-/* Set up a callback to be called when the current batch is flushed */
-void xen_mc_callback(void (*fn)(void *), void *data);
-
-/*
- * Try to extend the arguments of the previous multicall command.  The
- * previous command's op must match.  If it does, then it attempts to
- * extend the argument space allocated to the multicall entry by
- * arg_size bytes.
- *
- * The returned multicall_space will return with mc pointing to the
- * command on success, or NULL on failure, and args pointing to the
- * newly allocated space.
- */
-struct multicall_space xen_mc_extend_args(unsigned long op, size_t arg_size);
-
-#endif /* _XEN_MULTICALLS_H */

arch/x86/xen/p2m.c

@@ -81,7 +81,6 @@
 #include <xen/balloon.h>
 #include <xen/grant_table.h>
 
-#include "multicalls.h"
 #include "xen-ops.h"
 
 #define P2M_MID_PER_PAGE	(PAGE_SIZE / sizeof(unsigned long *))
@@ -795,7 +794,6 @@ int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops,
 
 #ifdef CONFIG_XEN_DEBUG_FS
 #include <linux/debugfs.h>
-#include "debugfs.h"
 static int p2m_dump_show(struct seq_file *m, void *v)
 {
 	static const char * const type_name[] = {

arch/x86/xen/pmu.c

@@ -10,7 +10,6 @@
 #include <xen/interface/xenpmu.h>
 
 #include "xen-ops.h"
-#include "pmu.h"
 
 /* x86_pmu.handle_irq definition */
 #include "../events/perf_event.h"

arch/x86/xen/pmu.h

-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __XEN_PMU_H
-#define __XEN_PMU_H
-
-#include <xen/interface/xenpmu.h>
-
-extern bool is_xen_pmu;
-
-irqreturn_t xen_pmu_irq_handler(int irq, void *dev_id);
-#ifdef CONFIG_XEN_HAVE_VPMU
-void xen_pmu_init(int cpu);
-void xen_pmu_finish(int cpu);
-#else
-static inline void xen_pmu_init(int cpu) {}
-static inline void xen_pmu_finish(int cpu) {}
-#endif
-bool pmu_msr_read(unsigned int msr, uint64_t *val, int *err);
-bool pmu_msr_write(unsigned int msr, uint32_t low, uint32_t high, int *err);
-int pmu_apic_update(uint32_t reg);
-unsigned long long xen_read_pmc(int counter);
-
-#endif /* __XEN_PMU_H */

arch/x86/xen/setup.c

@@ -34,7 +34,6 @@
 #include <xen/features.h>
 #include <xen/hvc-console.h>
 #include "xen-ops.h"
-#include "mmu.h"
 
 #define GB(x) ((uint64_t)(x) * 1024 * 1024 * 1024)
 

arch/x86/xen/smp.c

@@ -9,7 +9,6 @@
 
 #include <xen/hvc-console.h>
 #include "xen-ops.h"
-#include "smp.h"
 
 static DEFINE_PER_CPU(struct xen_common_irq, xen_resched_irq) = { .irq = -1 };
 static DEFINE_PER_CPU(struct xen_common_irq, xen_callfunc_irq) = { .irq = -1 };

arch/x86/xen/smp.h

-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _XEN_SMP_H
-
-#ifdef CONFIG_SMP
-
-void asm_cpu_bringup_and_idle(void);
-asmlinkage void cpu_bringup_and_idle(void);
-
-extern void xen_send_IPI_mask(const struct cpumask *mask,
-			      int vector);
-extern void xen_send_IPI_mask_allbutself(const struct cpumask *mask,
-				int vector);
-extern void xen_send_IPI_allbutself(int vector);
-extern void xen_send_IPI_all(int vector);
-extern void xen_send_IPI_self(int vector);
-
-extern int xen_smp_intr_init(unsigned int cpu);
-extern void xen_smp_intr_free(unsigned int cpu);
-int xen_smp_intr_init_pv(unsigned int cpu);
-void xen_smp_intr_free_pv(unsigned int cpu);
-
-void xen_smp_count_cpus(void);
-void xen_smp_cpus_done(unsigned int max_cpus);
-
-void xen_smp_send_reschedule(int cpu);
-void xen_smp_send_call_function_ipi(const struct cpumask *mask);
-void xen_smp_send_call_function_single_ipi(int cpu);
-
-void __noreturn xen_cpu_bringup_again(unsigned long stack);
-
-struct xen_common_irq {
-	int irq;
-	char *name;
-};
-#else /* CONFIG_SMP */
-
-static inline int xen_smp_intr_init(unsigned int cpu)
-{
-	return 0;
-}
-static inline void xen_smp_intr_free(unsigned int cpu) {}
-
-static inline int xen_smp_intr_init_pv(unsigned int cpu)
-{
-	return 0;
-}
-static inline void xen_smp_intr_free_pv(unsigned int cpu) {}
-static inline void xen_smp_count_cpus(void) { }
-#endif /* CONFIG_SMP */
-
-#endif

arch/x86/xen/smp_hvm.c

@@ -5,8 +5,6 @@
 #include <xen/events.h>
 
 #include "xen-ops.h"
-#include "smp.h"
-
 
 static void __init xen_hvm_smp_prepare_boot_cpu(void)
 {

arch/x86/xen/smp_pv.c

@@ -46,9 +46,6 @@
 
 #include <xen/hvc-console.h>
 #include "xen-ops.h"
-#include "mmu.h"
-#include "smp.h"
-#include "pmu.h"
 
 cpumask_var_t xen_cpu_initialized_map;
 

arch/x86/xen/suspend.c

@@ -15,8 +15,6 @@
 #include <asm/fixmap.h>
 
 #include "xen-ops.h"
-#include "mmu.h"
-#include "pmu.h"
 
 static DEFINE_PER_CPU(u64, spec_ctrl);
 

arch/x86/xen/xen-ops.h

@@ -5,8 +5,15 @@
 #include <linux/init.h>
 #include <linux/clocksource.h>
 #include <linux/irqreturn.h>
+#include <linux/linkage.h>
+
+#include <xen/interface/xenpmu.h>
 #include <xen/xen-ops.h>
 
+#include <asm/page.h>
+
+#include <trace/events/xen.h>
+
 /* These are code, but not functions.  Defined in entry.S */
 extern const char xen_failsafe_callback[];
 
@@ -28,8 +35,6 @@ extern struct start_info *xen_start_info;
 extern struct shared_info xen_dummy_shared_info;
 extern struct shared_info *HYPERVISOR_shared_info;
 
-extern bool xen_fifo_events;
-
 void xen_setup_mfn_list_list(void);
 void xen_build_mfn_list_list(void);
 void xen_setup_machphys_mapping(void);
@@ -176,4 +181,142 @@ static inline void xen_hvm_post_suspend(int suspend_cancelled) {}
 
 void xen_add_extra_mem(unsigned long start_pfn, unsigned long n_pfns);
 
+struct dentry * __init xen_init_debugfs(void);
+
+enum pt_level {
+	PT_PGD,
+	PT_P4D,
+	PT_PUD,
+	PT_PMD,
+	PT_PTE
+};
+
+bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);
+void set_pte_mfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags);
+unsigned long xen_read_cr2_direct(void);
+void xen_init_mmu_ops(void);
+void xen_hvm_init_mmu_ops(void);
+
+/* Multicalls */
+struct multicall_space
+{
+	struct multicall_entry *mc;
+	void *args;
+};
+
+/* Allocate room for a multicall and its args */
+struct multicall_space __xen_mc_entry(size_t args);
+
+DECLARE_PER_CPU(unsigned long, xen_mc_irq_flags);
+
+/* Call to start a batch of multiple __xen_mc_entry()s.  Must be
+   paired with xen_mc_issue() */
+static inline void xen_mc_batch(void)
+{
+	unsigned long flags;
+
+	/* need to disable interrupts until this entry is complete */
+	local_irq_save(flags);
+	trace_xen_mc_batch(xen_get_lazy_mode());
+	__this_cpu_write(xen_mc_irq_flags, flags);
+}
+
+static inline struct multicall_space xen_mc_entry(size_t args)
+{
+	xen_mc_batch();
+	return __xen_mc_entry(args);
+}
+
+/* Flush all pending multicalls */
+void xen_mc_flush(void);
+
+/* Issue a multicall if we're not in a lazy mode */
+static inline void xen_mc_issue(unsigned mode)
+{
+	trace_xen_mc_issue(mode);
+
+	if ((xen_get_lazy_mode() & mode) == 0)
+		xen_mc_flush();
+
+	/* restore flags saved in xen_mc_batch */
+	local_irq_restore(this_cpu_read(xen_mc_irq_flags));
+}
+
+/* Set up a callback to be called when the current batch is flushed */
+void xen_mc_callback(void (*fn)(void *), void *data);
+
+/*
+ * Try to extend the arguments of the previous multicall command.  The
+ * previous command's op must match.  If it does, then it attempts to
+ * extend the argument space allocated to the multicall entry by
+ * arg_size bytes.
+ *
+ * The returned multicall_space will return with mc pointing to the
+ * command on success, or NULL on failure, and args pointing to the
+ * newly allocated space.
+ */
+struct multicall_space xen_mc_extend_args(unsigned long op, size_t arg_size);
+
+extern bool is_xen_pmu;
+
+irqreturn_t xen_pmu_irq_handler(int irq, void *dev_id);
+#ifdef CONFIG_XEN_HAVE_VPMU
+void xen_pmu_init(int cpu);
+void xen_pmu_finish(int cpu);
+#else
+static inline void xen_pmu_init(int cpu) {}
+static inline void xen_pmu_finish(int cpu) {}
+#endif
+bool pmu_msr_read(unsigned int msr, uint64_t *val, int *err);
+bool pmu_msr_write(unsigned int msr, uint32_t low, uint32_t high, int *err);
+int pmu_apic_update(uint32_t reg);
+unsigned long long xen_read_pmc(int counter);
+
+#ifdef CONFIG_SMP
+
+void asm_cpu_bringup_and_idle(void);
+asmlinkage void cpu_bringup_and_idle(void);
+
+extern void xen_send_IPI_mask(const struct cpumask *mask,
+			      int vector);
+extern void xen_send_IPI_mask_allbutself(const struct cpumask *mask,
+				int vector);
+extern void xen_send_IPI_allbutself(int vector);
+extern void xen_send_IPI_all(int vector);
+extern void xen_send_IPI_self(int vector);
+
+extern int xen_smp_intr_init(unsigned int cpu);
+extern void xen_smp_intr_free(unsigned int cpu);
+int xen_smp_intr_init_pv(unsigned int cpu);
+void xen_smp_intr_free_pv(unsigned int cpu);
+
+void xen_smp_count_cpus(void);
+void xen_smp_cpus_done(unsigned int max_cpus);
+
+void xen_smp_send_reschedule(int cpu);
+void xen_smp_send_call_function_ipi(const struct cpumask *mask);
+void xen_smp_send_call_function_single_ipi(int cpu);
+
+void __noreturn xen_cpu_bringup_again(unsigned long stack);
+
+struct xen_common_irq {
+	int irq;
+	char *name;
+};
+#else /* CONFIG_SMP */
+
+static inline int xen_smp_intr_init(unsigned int cpu)
+{
+	return 0;
+}
+static inline void xen_smp_intr_free(unsigned int cpu) {}
+
+static inline int xen_smp_intr_init_pv(unsigned int cpu)
+{
+	return 0;
+}
+static inline void xen_smp_intr_free_pv(unsigned int cpu) {}
+static inline void xen_smp_count_cpus(void) { }
+#endif /* CONFIG_SMP */
+
 #endif /* XEN_OPS_H */

include/xen/events.h

@@ -144,4 +144,6 @@ static inline void xen_evtchn_close(evtchn_port_t port)
 		BUG();
 }
 
+extern bool xen_fifo_events;
+
 #endif	/* _XEN_EVENTS_H */