Merge branch 'for-queue' of https://github.com/agraf/linux-2.6 into queue

* 'for-queue' of https://github.com/agraf/linux-2.6:
  PPC: ePAPR: Convert hcall header to uapi (round 2)
  KVM: PPC: Book3S HV: Fix thinko in try_lock_hpte()
  KVM: PPC: Book3S HV: Allow DTL to be set to address 0, length 0
  KVM: PPC: Book3S HV: Fix accounting of stolen time
  KVM: PPC: Book3S HV: Run virtual core whenever any vcpus in it can run
  KVM: PPC: Book3S HV: Fixes for late-joining threads
  KVM: PPC: Book3s HV: Don't access runnable threads list without vcore lock
  KVM: PPC: Book3S HV: Fix some races in starting secondary threads
  KVM: PPC: Book3S HV: Allow KVM guests to stop secondary threads coming online
  PPC: ePAPR: Convert header to uapi
  KVM: PPC: Move mtspr/mfspr emulation into own functions
  KVM: Documentation: Fix reentry-to-be-consistent paragraph
  KVM: PPC: 44x: fix DCR read/write

13 files changed, 880 insertions, 626 deletions

diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index 4258180b1ecd..6671fdc0afb1 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -2183,7 +2183,8 @@ executed a memory-mapped I/O instruction which could not be satisfied
 by kvm.  The 'data' member contains the written data if 'is_write' is
 true, and should be filled by application code otherwise.
 
-NOTE: For KVM_EXIT_IO, KVM_EXIT_MMIO and KVM_EXIT_OSI, the corresponding
+NOTE: For KVM_EXIT_IO, KVM_EXIT_MMIO, KVM_EXIT_OSI, KVM_EXIT_DCR
+      and KVM_EXIT_PAPR the corresponding
 operations are complete (and guest state is consistent) only after userspace
 has re-entered the kernel with KVM_RUN.  The kernel side will first finish
 incomplete operations and then check for pending signals.  Userspace
diff --git a/arch/powerpc/include/asm/epapr_hcalls.h b/arch/powerpc/include/asm/epapr_hcalls.h
new file mode 100644
index 000000000000..d3d634274d2c
--- /dev/null
+++ b/arch/powerpc/include/asm/epapr_hcalls.h
@@ -0,0 +1,458 @@
+/*
+ * ePAPR hcall interface
+ *
+ * Copyright 2008-2011 Freescale Semiconductor, Inc.
+ *
+ * Author: Timur Tabi <timur@freescale.com>
+ *
+ * This file is provided under a dual BSD/GPL license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of Freescale Semiconductor nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* A "hypercall" is an "sc 1" instruction.  This header file file provides C
+ * wrapper functions for the ePAPR hypervisor interface.  It is inteded
+ * for use by Linux device drivers and other operating systems.
+ *
+ * The hypercalls are implemented as inline assembly, rather than assembly
+ * language functions in a .S file, for optimization.  It allows
+ * the caller to issue the hypercall instruction directly, improving both
+ * performance and memory footprint.
+ */
+
+#ifndef _EPAPR_HCALLS_H
+#define _EPAPR_HCALLS_H
+
+#include <uapi/asm/epapr_hcalls.h>
+
+#ifndef __ASSEMBLY__
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <asm/byteorder.h>
+
+/*
+ * Hypercall register clobber list
+ *
+ * These macros are used to define the list of clobbered registers during a
+ * hypercall.  Technically, registers r0 and r3-r12 are always clobbered,
+ * but the gcc inline assembly syntax does not allow us to specify registers
+ * on the clobber list that are also on the input/output list.  Therefore,
+ * the lists of clobbered registers depends on the number of register
+ * parmeters ("+r" and "=r") passed to the hypercall.
+ *
+ * Each assembly block should use one of the HCALL_CLOBBERSx macros.  As a
+ * general rule, 'x' is the number of parameters passed to the assembly
+ * block *except* for r11.
+ *
+ * If you're not sure, just use the smallest value of 'x' that does not
+ * generate a compilation error.  Because these are static inline functions,
+ * the compiler will only check the clobber list for a function if you
+ * compile code that calls that function.
+ *
+ * r3 and r11 are not included in any clobbers list because they are always
+ * listed as output registers.
+ *
+ * XER, CTR, and LR are currently listed as clobbers because it's uncertain
+ * whether they will be clobbered.
+ *
+ * Note that r11 can be used as an output parameter.
+ *
+ * The "memory" clobber is only necessary for hcalls where the Hypervisor
+ * will read or write guest memory. However, we add it to all hcalls because
+ * the impact is minimal, and we want to ensure that it's present for the
+ * hcalls that need it.
+*/
+
+/* List of common clobbered registers.  Do not use this macro. */
+#define EV_HCALL_CLOBBERS "r0", "r12", "xer", "ctr", "lr", "cc", "memory"
+
+#define EV_HCALL_CLOBBERS8 EV_HCALL_CLOBBERS
+#define EV_HCALL_CLOBBERS7 EV_HCALL_CLOBBERS8, "r10"
+#define EV_HCALL_CLOBBERS6 EV_HCALL_CLOBBERS7, "r9"
+#define EV_HCALL_CLOBBERS5 EV_HCALL_CLOBBERS6, "r8"
+#define EV_HCALL_CLOBBERS4 EV_HCALL_CLOBBERS5, "r7"
+#define EV_HCALL_CLOBBERS3 EV_HCALL_CLOBBERS4, "r6"
+#define EV_HCALL_CLOBBERS2 EV_HCALL_CLOBBERS3, "r5"
+#define EV_HCALL_CLOBBERS1 EV_HCALL_CLOBBERS2, "r4"
+
+extern bool epapr_paravirt_enabled;
+extern u32 epapr_hypercall_start[];
+
+/*
+ * We use "uintptr_t" to define a register because it's guaranteed to be a
+ * 32-bit integer on a 32-bit platform, and a 64-bit integer on a 64-bit
+ * platform.
+ *
+ * All registers are either input/output or output only.  Registers that are
+ * initialized before making the hypercall are input/output.  All
+ * input/output registers are represented with "+r".  Output-only registers
+ * are represented with "=r".  Do not specify any unused registers.  The
+ * clobber list will tell the compiler that the hypercall modifies those
+ * registers, which is good enough.
+ */
+
+/**
+ * ev_int_set_config - configure the specified interrupt
+ * @interrupt: the interrupt number
+ * @config: configuration for this interrupt
+ * @priority: interrupt priority
+ * @destination: destination CPU number
+ *
+ * Returns 0 for success, or an error code.
+ */
+static inline unsigned int ev_int_set_config(unsigned int interrupt,
+	uint32_t config, unsigned int priority, uint32_t destination)
+{
+	register uintptr_t r11 __asm__("r11");
+	register uintptr_t r3 __asm__("r3");
+	register uintptr_t r4 __asm__("r4");
+	register uintptr_t r5 __asm__("r5");
+	register uintptr_t r6 __asm__("r6");
+
+	r11 = EV_HCALL_TOKEN(EV_INT_SET_CONFIG);
+	r3  = interrupt;
+	r4  = config;
+	r5  = priority;
+	r6  = destination;
+
+	asm volatile("bl	epapr_hypercall_start"
+		: "+r" (r11), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6)
+		: : EV_HCALL_CLOBBERS4
+	);
+
+	return r3;
+}
+
+/**
+ * ev_int_get_config - return the config of the specified interrupt
+ * @interrupt: the interrupt number
+ * @config: returned configuration for this interrupt
+ * @priority: returned interrupt priority
+ * @destination: returned destination CPU number
+ *
+ * Returns 0 for success, or an error code.
+ */
+static inline unsigned int ev_int_get_config(unsigned int interrupt,
+	uint32_t *config, unsigned int *priority, uint32_t *destination)
+{
+	register uintptr_t r11 __asm__("r11");
+	register uintptr_t r3 __asm__("r3");
+	register uintptr_t r4 __asm__("r4");
+	register uintptr_t r5 __asm__("r5");
+	register uintptr_t r6 __asm__("r6");
+
+	r11 = EV_HCALL_TOKEN(EV_INT_GET_CONFIG);
+	r3 = interrupt;
+
+	asm volatile("bl	epapr_hypercall_start"
+		: "+r" (r11), "+r" (r3), "=r" (r4), "=r" (r5), "=r" (r6)
+		: : EV_HCALL_CLOBBERS4
+	);
+
+	*config = r4;
+	*priority = r5;
+	*destination = r6;
+
+	return r3;
+}
+
+/**
+ * ev_int_set_mask - sets the mask for the specified interrupt source
+ * @interrupt: the interrupt number
+ * @mask: 0=enable interrupts, 1=disable interrupts
+ *
+ * Returns 0 for success, or an error code.
+ */
+static inline unsigned int ev_int_set_mask(unsigned int interrupt,
+	unsigned int mask)
+{
+	register uintptr_t r11 __asm__("r11");
+	register uintptr_t r3 __asm__("r3");
+	register uintptr_t r4 __asm__("r4");
+
+	r11 = EV_HCALL_TOKEN(EV_INT_SET_MASK);
+	r3 = interrupt;
+	r4 = mask;
+
+	asm volatile("bl	epapr_hypercall_start"
+		: "+r" (r11), "+r" (r3), "+r" (r4)
+		: : EV_HCALL_CLOBBERS2
+	);
+
+	return r3;
+}
+
+/**
+ * ev_int_get_mask - returns the mask for the specified interrupt source
+ * @interrupt: the interrupt number
+ * @mask: returned mask for this interrupt (0=enabled, 1=disabled)
+ *
+ * Returns 0 for success, or an error code.
+ */
+static inline unsigned int ev_int_get_mask(unsigned int interrupt,
+	unsigned int *mask)
+{
+	register uintptr_t r11 __asm__("r11");
+	register uintptr_t r3 __asm__("r3");
+	register uintptr_t r4 __asm__("r4");
+
+	r11 = EV_HCALL_TOKEN(EV_INT_GET_MASK);
+	r3 = interrupt;
+
+	asm volatile("bl	epapr_hypercall_start"
+		: "+r" (r11), "+r" (r3), "=r" (r4)
+		: : EV_HCALL_CLOBBERS2
+	);
+
+	*mask = r4;
+
+	return r3;
+}
+
+/**
+ * ev_int_eoi - signal the end of interrupt processing
+ * @interrupt: the interrupt number
+ *
+ * This function signals the end of processing for the the specified
+ * interrupt, which must be the interrupt currently in service. By
+ * definition, this is also the highest-priority interrupt.
+ *
+ * Returns 0 for success, or an error code.
+ */
+static inline unsigned int ev_int_eoi(unsigned int interrupt)
+{
+	register uintptr_t r11 __asm__("r11");
+	register uintptr_t r3 __asm__("r3");
+
+	r11 = EV_HCALL_TOKEN(EV_INT_EOI);
+	r3 = interrupt;
+
+	asm volatile("bl	epapr_hypercall_start"
+		: "+r" (r11), "+r" (r3)
+		: : EV_HCALL_CLOBBERS1
+	);
+
+	return r3;
+}
+
+/**
+ * ev_byte_channel_send - send characters to a byte stream
+ * @handle: byte stream handle
+ * @count: (input) num of chars to send, (output) num chars sent
+ * @buffer: pointer to a 16-byte buffer
+ *
+ * @buffer must be at least 16 bytes long, because all 16 bytes will be
+ * read from memory into registers, even if count < 16.
+ *
+ * Returns 0 for success, or an error code.
+ */
+static inline unsigned int ev_byte_channel_send(unsigned int handle,
+	unsigned int *count, const char buffer[EV_BYTE_CHANNEL_MAX_BYTES])
+{
+	register uintptr_t r11 __asm__("r11");
+	register uintptr_t r3 __asm__("r3");
+	register uintptr_t r4 __asm__("r4");
+	register uintptr_t r5 __asm__("r5");
+	register uintptr_t r6 __asm__("r6");
+	register uintptr_t r7 __asm__("r7");
+	register uintptr_t r8 __asm__("r8");
+	const uint32_t *p = (const uint32_t *) buffer;
+
+	r11 = EV_HCALL_TOKEN(EV_BYTE_CHANNEL_SEND);
+	r3 = handle;
+	r4 = *count;
+	r5 = be32_to_cpu(p[0]);
+	r6 = be32_to_cpu(p[1]);
+	r7 = be32_to_cpu(p[2]);
+	r8 = be32_to_cpu(p[3]);
+
+	asm volatile("bl	epapr_hypercall_start"
+		: "+r" (r11), "+r" (r3),
+		  "+r" (r4), "+r" (r5), "+r" (r6), "+r" (r7), "+r" (r8)
+		: : EV_HCALL_CLOBBERS6
+	);
+
+	*count = r4;
+
+	return r3;
+}
+
+/**
+ * ev_byte_channel_receive - fetch characters from a byte channel
+ * @handle: byte channel handle
+ * @count: (input) max num of chars to receive, (output) num chars received
+ * @buffer: pointer to a 16-byte buffer
+ *
+ * The size of @buffer must be at least 16 bytes, even if you request fewer
+ * than 16 characters, because we always write 16 bytes to @buffer.  This is
+ * for performance reasons.
+ *
+ * Returns 0 for success, or an error code.
+ */
+static inline unsigned int ev_byte_channel_receive(unsigned int handle,
+	unsigned int *count, char buffer[EV_BYTE_CHANNEL_MAX_BYTES])
+{
+	register uintptr_t r11 __asm__("r11");
+	register uintptr_t r3 __asm__("r3");
+	register uintptr_t r4 __asm__("r4");
+	register uintptr_t r5 __asm__("r5");
+	register uintptr_t r6 __asm__("r6");
+	register uintptr_t r7 __asm__("r7");
+	register uintptr_t r8 __asm__("r8");
+	uint32_t *p = (uint32_t *) buffer;
+
+	r11 = EV_HCALL_TOKEN(EV_BYTE_CHANNEL_RECEIVE);
+	r3 = handle;
+	r4 = *count;
+
+	asm volatile("bl	epapr_hypercall_start"
+		: "+r" (r11), "+r" (r3), "+r" (r4),
+		  "=r" (r5), "=r" (r6), "=r" (r7), "=r" (r8)
+		: : EV_HCALL_CLOBBERS6
+	);
+
+	*count = r4;
+	p[0] = cpu_to_be32(r5);
+	p[1] = cpu_to_be32(r6);
+	p[2] = cpu_to_be32(r7);
+	p[3] = cpu_to_be32(r8);
+
+	return r3;
+}
+
+/**
+ * ev_byte_channel_poll - returns the status of the byte channel buffers
+ * @handle: byte channel handle
+ * @rx_count: returned count of bytes in receive queue
+ * @tx_count: returned count of free space in transmit queue
+ *
+ * This function reports the amount of data in the receive queue (i.e. the
+ * number of bytes you can read), and the amount of free space in the transmit
+ * queue (i.e. the number of bytes you can write).
+ *
+ * Returns 0 for success, or an error code.
+ */
+static inline unsigned int ev_byte_channel_poll(unsigned int handle,
+	unsigned int *rx_count,	unsigned int *tx_count)
+{
+	register uintptr_t r11 __asm__("r11");
+	register uintptr_t r3 __asm__("r3");
+	register uintptr_t r4 __asm__("r4");
+	register uintptr_t r5 __asm__("r5");
+
+	r11 = EV_HCALL_TOKEN(EV_BYTE_CHANNEL_POLL);
+	r3 = handle;
+
+	asm volatile("bl	epapr_hypercall_start"
+		: "+r" (r11), "+r" (r3), "=r" (r4), "=r" (r5)
+		: : EV_HCALL_CLOBBERS3
+	);
+
+	*rx_count = r4;
+	*tx_count = r5;
+
+	return r3;
+}
+
+/**
+ * ev_int_iack - acknowledge an interrupt
+ * @handle: handle to the target interrupt controller
+ * @vector: returned interrupt vector
+ *
+ * If handle is zero, the function returns the next interrupt source
+ * number to be handled irrespective of the hierarchy or cascading
+ * of interrupt controllers. If non-zero, specifies a handle to the
+ * interrupt controller that is the target of the acknowledge.
+ *
+ * Returns 0 for success, or an error code.
+ */
+static inline unsigned int ev_int_iack(unsigned int handle,
+	unsigned int *vector)
+{
+	register uintptr_t r11 __asm__("r11");
+	register uintptr_t r3 __asm__("r3");
+	register uintptr_t r4 __asm__("r4");
+
+	r11 = EV_HCALL_TOKEN(EV_INT_IACK);
+	r3 = handle;
+
+	asm volatile("bl	epapr_hypercall_start"
+		: "+r" (r11), "+r" (r3), "=r" (r4)
+		: : EV_HCALL_CLOBBERS2
+	);
+
+	*vector = r4;
+
+	return r3;
+}
+
+/**
+ * ev_doorbell_send - send a doorbell to another partition
+ * @handle: doorbell send handle
+ *
+ * Returns 0 for success, or an error code.
+ */
+static inline unsigned int ev_doorbell_send(unsigned int handle)
+{
+	register uintptr_t r11 __asm__("r11");
+	register uintptr_t r3 __asm__("r3");
+
+	r11 = EV_HCALL_TOKEN(EV_DOORBELL_SEND);
+	r3 = handle;
+
+	asm volatile("bl	epapr_hypercall_start"
+		: "+r" (r11), "+r" (r3)
+		: : EV_HCALL_CLOBBERS1
+	);
+
+	return r3;
+}
+
+/**
+ * ev_idle -- wait for next interrupt on this core
+ *
+ * Returns 0 for success, or an error code.
+ */
+static inline unsigned int ev_idle(void)
+{
+	register uintptr_t r11 __asm__("r11");
+	register uintptr_t r3 __asm__("r3");
+
+	r11 = EV_HCALL_TOKEN(EV_IDLE);
+
+	asm volatile("bl	epapr_hypercall_start"
+		: "+r" (r11), "=r" (r3)
+		: : EV_HCALL_CLOBBERS1
+	);
+
+	return r3;
+}
+#endif /* !__ASSEMBLY__ */
+#endif /* _EPAPR_HCALLS_H */
diff --git a/arch/powerpc/include/asm/kvm_asm.h b/arch/powerpc/include/asm/kvm_asm.h
index 76fdcfef0889..aabcdba8f6b0 100644
--- a/arch/powerpc/include/asm/kvm_asm.h
+++ b/arch/powerpc/include/asm/kvm_asm.h
@@ -118,6 +118,7 @@
 
 #define RESUME_FLAG_NV          (1<<0)  /* Reload guest nonvolatile state? */
 #define RESUME_FLAG_HOST        (1<<1)  /* Resume host? */
+#define RESUME_FLAG_ARCH1	(1<<2)
 
 #define RESUME_GUEST            0
 #define RESUME_GUEST_NV         RESUME_FLAG_NV
diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h b/arch/powerpc/include/asm/kvm_book3s_64.h
index 0dd1d86d3e31..1472a5b4e4e3 100644
--- a/arch/powerpc/include/asm/kvm_book3s_64.h
+++ b/arch/powerpc/include/asm/kvm_book3s_64.h
@@ -60,7 +60,7 @@ static inline long try_lock_hpte(unsigned long *hpte, unsigned long bits)
 		     "	ori	%0,%0,%4\n"
 		     "  stdcx.	%0,0,%2\n"
 		     "	beq+	2f\n"
-		     "	li	%1,%3\n"
+		     "	mr	%1,%3\n"
 		     "2:	isync"
 		     : "=&r" (tmp), "=&r" (old)
 		     : "r" (hpte), "r" (bits), "i" (HPTE_V_HVLOCK)
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index 68f5a308737a..3093896015f0 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -289,9 +289,10 @@ struct kvmppc_vcore {
 
 /* Values for vcore_state */
 #define VCORE_INACTIVE	0
-#define VCORE_RUNNING	1
-#define VCORE_EXITING	2
-#define VCORE_SLEEPING	3
+#define VCORE_SLEEPING	1
+#define VCORE_STARTING	2
+#define VCORE_RUNNING	3
+#define VCORE_EXITING	4
 
 /*
  * Struct used to manage memory for a virtual processor area
@@ -558,13 +559,17 @@ struct kvm_vcpu_arch {
 	unsigned long dtl_index;
 	u64 stolen_logged;
 	struct kvmppc_vpa slb_shadow;
+
+	spinlock_t tbacct_lock;
+	u64 busy_stolen;
+	u64 busy_preempt;
 #endif
 };
 
 /* Values for vcpu->arch.state */
-#define KVMPPC_VCPU_STOPPED		0
-#define KVMPPC_VCPU_BUSY_IN_HOST	1
-#define KVMPPC_VCPU_RUNNABLE		2
+#define KVMPPC_VCPU_NOTREADY		0
+#define KVMPPC_VCPU_RUNNABLE		1
+#define KVMPPC_VCPU_BUSY_IN_HOST	2
 
 /* Values for vcpu->arch.io_gpr */
 #define KVM_MMIO_REG_MASK	0x001f
diff --git a/arch/powerpc/include/asm/smp.h b/arch/powerpc/include/asm/smp.h
index e807e9d8e3f7..5a4e437c238d 100644
--- a/arch/powerpc/include/asm/smp.h
+++ b/arch/powerpc/include/asm/smp.h
@@ -67,6 +67,14 @@ void generic_mach_cpu_die(void);
 void generic_set_cpu_dead(unsigned int cpu);
 void generic_set_cpu_up(unsigned int cpu);
 int generic_check_cpu_restart(unsigned int cpu);
+
+extern void inhibit_secondary_onlining(void);
+extern void uninhibit_secondary_onlining(void);
+
+#else /* HOTPLUG_CPU */
+static inline void inhibit_secondary_onlining(void) {}
+static inline void uninhibit_secondary_onlining(void) {}
+
 #endif
 
 #ifdef CONFIG_PPC64
diff --git a/arch/powerpc/include/uapi/asm/Kbuild b/arch/powerpc/include/uapi/asm/Kbuild
index 9eedfc5a557b..f7bca6370745 100644
--- a/arch/powerpc/include/uapi/asm/Kbuild
+++ b/arch/powerpc/include/uapi/asm/Kbuild
@@ -7,6 +7,7 @@ header-y += bootx.h
 header-y += byteorder.h
 header-y += cputable.h
 header-y += elf.h
+header-y += epapr_hcalls.h
 header-y += errno.h
 header-y += fcntl.h
 header-y += ioctl.h
@@ -42,4 +43,3 @@ header-y += termios.h
 header-y += types.h
 header-y += ucontext.h
 header-y += unistd.h
-header-y += epapr_hcalls.h
diff --git a/arch/powerpc/include/uapi/asm/epapr_hcalls.h b/arch/powerpc/include/uapi/asm/epapr_hcalls.h
index b8d94459a929..7f9c74b46704 100644
--- a/arch/powerpc/include/uapi/asm/epapr_hcalls.h
+++ b/arch/powerpc/include/uapi/asm/epapr_hcalls.h
@@ -37,18 +37,8 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-/* A "hypercall" is an "sc 1" instruction.  This header file file provides C
- * wrapper functions for the ePAPR hypervisor interface.  It is inteded
- * for use by Linux device drivers and other operating systems.
- *
- * The hypercalls are implemented as inline assembly, rather than assembly
- * language functions in a .S file, for optimization.  It allows
- * the caller to issue the hypercall instruction directly, improving both
- * performance and memory footprint.
- */
-
-#ifndef _EPAPR_HCALLS_H
-#define _EPAPR_HCALLS_H
+#ifndef _UAPI_ASM_POWERPC_EPAPR_HCALLS_H
+#define _UAPI_ASM_POWERPC_EPAPR_HCALLS_H
 
 #define EV_BYTE_CHANNEL_SEND		1
 #define EV_BYTE_CHANNEL_RECEIVE		2
@@ -105,407 +95,4 @@
 #define EV_UNIMPLEMENTED	12	/* Unimplemented hypercall */
 #define EV_BUFFER_OVERFLOW	13	/* Caller-supplied buffer too small */
 
-#ifndef __ASSEMBLY__
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <asm/byteorder.h>
-
-/*
- * Hypercall register clobber list
- *
- * These macros are used to define the list of clobbered registers during a
- * hypercall.  Technically, registers r0 and r3-r12 are always clobbered,
- * but the gcc inline assembly syntax does not allow us to specify registers
- * on the clobber list that are also on the input/output list.  Therefore,
- * the lists of clobbered registers depends on the number of register
- * parmeters ("+r" and "=r") passed to the hypercall.
- *
- * Each assembly block should use one of the HCALL_CLOBBERSx macros.  As a
- * general rule, 'x' is the number of parameters passed to the assembly
- * block *except* for r11.
- *
- * If you're not sure, just use the smallest value of 'x' that does not
- * generate a compilation error.  Because these are static inline functions,
- * the compiler will only check the clobber list for a function if you
- * compile code that calls that function.
- *
- * r3 and r11 are not included in any clobbers list because they are always
- * listed as output registers.
- *
- * XER, CTR, and LR are currently listed as clobbers because it's uncertain
- * whether they will be clobbered.
- *
- * Note that r11 can be used as an output parameter.
- *
- * The "memory" clobber is only necessary for hcalls where the Hypervisor
- * will read or write guest memory. However, we add it to all hcalls because
- * the impact is minimal, and we want to ensure that it's present for the
- * hcalls that need it.
-*/
-
-/* List of common clobbered registers.  Do not use this macro. */
-#define EV_HCALL_CLOBBERS "r0", "r12", "xer", "ctr", "lr", "cc", "memory"
-
-#define EV_HCALL_CLOBBERS8 EV_HCALL_CLOBBERS
-#define EV_HCALL_CLOBBERS7 EV_HCALL_CLOBBERS8, "r10"
-#define EV_HCALL_CLOBBERS6 EV_HCALL_CLOBBERS7, "r9"
-#define EV_HCALL_CLOBBERS5 EV_HCALL_CLOBBERS6, "r8"
-#define EV_HCALL_CLOBBERS4 EV_HCALL_CLOBBERS5, "r7"
-#define EV_HCALL_CLOBBERS3 EV_HCALL_CLOBBERS4, "r6"
-#define EV_HCALL_CLOBBERS2 EV_HCALL_CLOBBERS3, "r5"
-#define EV_HCALL_CLOBBERS1 EV_HCALL_CLOBBERS2, "r4"
-
-extern bool epapr_paravirt_enabled;
-extern u32 epapr_hypercall_start[];
-
-/*
- * We use "uintptr_t" to define a register because it's guaranteed to be a
- * 32-bit integer on a 32-bit platform, and a 64-bit integer on a 64-bit
- * platform.
- *
- * All registers are either input/output or output only.  Registers that are
- * initialized before making the hypercall are input/output.  All
- * input/output registers are represented with "+r".  Output-only registers
- * are represented with "=r".  Do not specify any unused registers.  The
- * clobber list will tell the compiler that the hypercall modifies those
- * registers, which is good enough.
- */
-
-/**
- * ev_int_set_config - configure the specified interrupt
- * @interrupt: the interrupt number
- * @config: configuration for this interrupt
- * @priority: interrupt priority
- * @destination: destination CPU number
- *
- * Returns 0 for success, or an error code.
- */
-static inline unsigned int ev_int_set_config(unsigned int interrupt,
-	uint32_t config, unsigned int priority, uint32_t destination)
-{
-	register uintptr_t r11 __asm__("r11");
-	register uintptr_t r3 __asm__("r3");
-	register uintptr_t r4 __asm__("r4");
-	register uintptr_t r5 __asm__("r5");
-	register uintptr_t r6 __asm__("r6");
-
-	r11 = EV_HCALL_TOKEN(EV_INT_SET_CONFIG);
-	r3  = interrupt;
-	r4  = config;
-	r5  = priority;
-	r6  = destination;
-
-	asm volatile("bl	epapr_hypercall_start"
-		: "+r" (r11), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6)
-		: : EV_HCALL_CLOBBERS4
-	);
-
-	return r3;
-}
-
-/**
- * ev_int_get_config - return the config of the specified interrupt
- * @interrupt: the interrupt number
- * @config: returned configuration for this interrupt
- * @priority: returned interrupt priority
- * @destination: returned destination CPU number
- *
- * Returns 0 for success, or an error code.
- */
-static inline unsigned int ev_int_get_config(unsigned int interrupt,
-	uint32_t *config, unsigned int *priority, uint32_t *destination)
-{
-	register uintptr_t r11 __asm__("r11");
-	register uintptr_t r3 __asm__("r3");
-	register uintptr_t r4 __asm__("r4");
-	register uintptr_t r5 __asm__("r5");
-	register uintptr_t r6 __asm__("r6");
-
-	r11 = EV_HCALL_TOKEN(EV_INT_GET_CONFIG);
-	r3 = interrupt;
-
-	asm volatile("bl	epapr_hypercall_start"
-		: "+r" (r11), "+r" (r3), "=r" (r4), "=r" (r5), "=r" (r6)
-		: : EV_HCALL_CLOBBERS4
-	);
-
-	*config = r4;
-	*priority = r5;
-	*destination = r6;
-
-	return r3;
-}
-
-/**
- * ev_int_set_mask - sets the mask for the specified interrupt source
- * @interrupt: the interrupt number
- * @mask: 0=enable interrupts, 1=disable interrupts
- *
- * Returns 0 for success, or an error code.
- */
-static inline unsigned int ev_int_set_mask(unsigned int interrupt,
-	unsigned int mask)
-{
-	register uintptr_t r11 __asm__("r11");
-	register uintptr_t r3 __asm__("r3");
-	register uintptr_t r4 __asm__("r4");
-
-	r11 = EV_HCALL_TOKEN(EV_INT_SET_MASK);
-	r3 = interrupt;
-	r4 = mask;
-
-	asm volatile("bl	epapr_hypercall_start"
-		: "+r" (r11), "+r" (r3), "+r" (r4)
-		: : EV_HCALL_CLOBBERS2
-	);
-
-	return r3;
-}
-
-/**
- * ev_int_get_mask - returns the mask for the specified interrupt source
- * @interrupt: the interrupt number
- * @mask: returned mask for this interrupt (0=enabled, 1=disabled)
- *
- * Returns 0 for success, or an error code.
- */
-static inline unsigned int ev_int_get_mask(unsigned int interrupt,
-	unsigned int *mask)
-{
-	register uintptr_t r11 __asm__("r11");
-	register uintptr_t r3 __asm__("r3");
-	register uintptr_t r4 __asm__("r4");
-
-	r11 = EV_HCALL_TOKEN(EV_INT_GET_MASK);
-	r3 = interrupt;
-
-	asm volatile("bl	epapr_hypercall_start"
-		: "+r" (r11), "+r" (r3), "=r" (r4)
-		: : EV_HCALL_CLOBBERS2
-	);
-
-	*mask = r4;
-
-	return r3;
-}
-
-/**
- * ev_int_eoi - signal the end of interrupt processing
- * @interrupt: the interrupt number
- *
- * This function signals the end of processing for the the specified
- * interrupt, which must be the interrupt currently in service. By
- * definition, this is also the highest-priority interrupt.
- *
- * Returns 0 for success, or an error code.
- */
-static inline unsigned int ev_int_eoi(unsigned int interrupt)
-{
-	register uintptr_t r11 __asm__("r11");
-	register uintptr_t r3 __asm__("r3");
-
-	r11 = EV_HCALL_TOKEN(EV_INT_EOI);
-	r3 = interrupt;
-
-	asm volatile("bl	epapr_hypercall_start"
-		: "+r" (r11), "+r" (r3)
-		: : EV_HCALL_CLOBBERS1
-	);
-
-	return r3;
-}
-
-/**
- * ev_byte_channel_send - send characters to a byte stream
- * @handle: byte stream handle
- * @count: (input) num of chars to send, (output) num chars sent
- * @buffer: pointer to a 16-byte buffer
- *
- * @buffer must be at least 16 bytes long, because all 16 bytes will be
- * read from memory into registers, even if count < 16.
- *
- * Returns 0 for success, or an error code.
- */
-static inline unsigned int ev_byte_channel_send(unsigned int handle,
-	unsigned int *count, const char buffer[EV_BYTE_CHANNEL_MAX_BYTES])
-{
-	register uintptr_t r11 __asm__("r11");
-	register uintptr_t r3 __asm__("r3");
-	register uintptr_t r4 __asm__("r4");
-	register uintptr_t r5 __asm__("r5");
-	register uintptr_t r6 __asm__("r6");
-	register uintptr_t r7 __asm__("r7");
-	register uintptr_t r8 __asm__("r8");
-	const uint32_t *p = (const uint32_t *) buffer;
-
-	r11 = EV_HCALL_TOKEN(EV_BYTE_CHANNEL_SEND);
-	r3 = handle;
-	r4 = *count;
-	r5 = be32_to_cpu(p[0]);
-	r6 = be32_to_cpu(p[1]);
-	r7 = be32_to_cpu(p[2]);
-	r8 = be32_to_cpu(p[3]);
-
-	asm volatile("bl	epapr_hypercall_start"
-		: "+r" (r11), "+r" (r3),
-		  "+r" (r4), "+r" (r5), "+r" (r6), "+r" (r7), "+r" (r8)
-		: : EV_HCALL_CLOBBERS6
-	);
-
-	*count = r4;
-
-	return r3;
-}
-
-/**
- * ev_byte_channel_receive - fetch characters from a byte channel
- * @handle: byte channel handle
- * @count: (input) max num of chars to receive, (output) num chars received
- * @buffer: pointer to a 16-byte buffer
- *
- * The size of @buffer must be at least 16 bytes, even if you request fewer
- * than 16 characters, because we always write 16 bytes to @buffer.  This is
- * for performance reasons.
- *
- * Returns 0 for success, or an error code.
- */
-static inline unsigned int ev_byte_channel_receive(unsigned int handle,
-	unsigned int *count, char buffer[EV_BYTE_CHANNEL_MAX_BYTES])
-{
-	register uintptr_t r11 __asm__("r11");
-	register uintptr_t r3 __asm__("r3");
-	register uintptr_t r4 __asm__("r4");
-	register uintptr_t r5 __asm__("r5");
-	register uintptr_t r6 __asm__("r6");
-	register uintptr_t r7 __asm__("r7");
-	register uintptr_t r8 __asm__("r8");
-	uint32_t *p = (uint32_t *) buffer;
-
-	r11 = EV_HCALL_TOKEN(EV_BYTE_CHANNEL_RECEIVE);
-	r3 = handle;
-	r4 = *count;
-
-	asm volatile("bl	epapr_hypercall_start"
-		: "+r" (r11), "+r" (r3), "+r" (r4),
-		  "=r" (r5), "=r" (r6), "=r" (r7), "=r" (r8)
-		: : EV_HCALL_CLOBBERS6
-	);
-
-	*count = r4;
-	p[0] = cpu_to_be32(r5);
-	p[1] = cpu_to_be32(r6);
-	p[2] = cpu_to_be32(r7);
-	p[3] = cpu_to_be32(r8);
-
-	return r3;
-}
-
-/**
- * ev_byte_channel_poll - returns the status of the byte channel buffers
- * @handle: byte channel handle
- * @rx_count: returned count of bytes in receive queue
- * @tx_count: returned count of free space in transmit queue
- *
- * This function reports the amount of data in the receive queue (i.e. the
- * number of bytes you can read), and the amount of free space in the transmit
- * queue (i.e. the number of bytes you can write).
- *
- * Returns 0 for success, or an error code.
- */
-static inline unsigned int ev_byte_channel_poll(unsigned int handle,
-	unsigned int *rx_count,	unsigned int *tx_count)
-{
-	register uintptr_t r11 __asm__("r11");
-	register uintptr_t r3 __asm__("r3");
-	register uintptr_t r4 __asm__("r4");
-	register uintptr_t r5 __asm__("r5");
-
-	r11 = EV_HCALL_TOKEN(EV_BYTE_CHANNEL_POLL);
-	r3 = handle;
-
-	asm volatile("bl	epapr_hypercall_start"
-		: "+r" (r11), "+r" (r3), "=r" (r4), "=r" (r5)
-		: : EV_HCALL_CLOBBERS3
-	);
-
-	*rx_count = r4;
-	*tx_count = r5;
-
-	return r3;
-}
-
-/**
- * ev_int_iack - acknowledge an interrupt
- * @handle: handle to the target interrupt controller
- * @vector: returned interrupt vector
- *
- * If handle is zero, the function returns the next interrupt source
- * number to be handled irrespective of the hierarchy or cascading
- * of interrupt controllers. If non-zero, specifies a handle to the
- * interrupt controller that is the target of the acknowledge.
- *
- * Returns 0 for success, or an error code.
- */
-static inline unsigned int ev_int_iack(unsigned int handle,
-	unsigned int *vector)
-{
-	register uintptr_t r11 __asm__("r11");
-	register uintptr_t r3 __asm__("r3");
-	register uintptr_t r4 __asm__("r4");
-
-	r11 = EV_HCALL_TOKEN(EV_INT_IACK);
-	r3 = handle;
-
-	asm volatile("bl	epapr_hypercall_start"
-		: "+r" (r11), "+r" (r3), "=r" (r4)