656 lines
17 KiB
C
656 lines
17 KiB
C
/*
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* Freescale hypervisor call interface
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*
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* Copyright 2008-2010 Freescale Semiconductor, Inc.
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*
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* Author: Timur Tabi <timur@freescale.com>
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*
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* This file is provided under a dual BSD/GPL license. When using or
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* redistributing this file, you may do so under either license.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Freescale Semiconductor nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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*
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* ALTERNATIVELY, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") as published by the Free Software
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* Foundation, either version 2 of that License or (at your option) any
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* later version.
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*
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* THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _FSL_HCALLS_H
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#define _FSL_HCALLS_H
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <asm/byteorder.h>
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#include <asm/epapr_hcalls.h>
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#define FH_API_VERSION 1
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#define FH_ERR_GET_INFO 1
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#define FH_PARTITION_GET_DTPROP 2
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#define FH_PARTITION_SET_DTPROP 3
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#define FH_PARTITION_RESTART 4
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#define FH_PARTITION_GET_STATUS 5
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#define FH_PARTITION_START 6
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#define FH_PARTITION_STOP 7
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#define FH_PARTITION_MEMCPY 8
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#define FH_DMA_ENABLE 9
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#define FH_DMA_DISABLE 10
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#define FH_SEND_NMI 11
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#define FH_VMPIC_GET_MSIR 12
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#define FH_SYSTEM_RESET 13
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#define FH_GET_CORE_STATE 14
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#define FH_ENTER_NAP 15
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#define FH_EXIT_NAP 16
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#define FH_CLAIM_DEVICE 17
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#define FH_PARTITION_STOP_DMA 18
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/* vendor ID: Freescale Semiconductor */
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#define FH_HCALL_TOKEN(num) _EV_HCALL_TOKEN(EV_FSL_VENDOR_ID, num)
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/*
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* We use "uintptr_t" to define a register because it's guaranteed to be a
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* 32-bit integer on a 32-bit platform, and a 64-bit integer on a 64-bit
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* platform.
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*
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* All registers are either input/output or output only. Registers that are
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* initialized before making the hypercall are input/output. All
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* input/output registers are represented with "+r". Output-only registers
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* are represented with "=r". Do not specify any unused registers. The
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* clobber list will tell the compiler that the hypercall modifies those
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* registers, which is good enough.
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*/
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/**
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* fh_send_nmi - send NMI to virtual cpu(s).
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* @vcpu_mask: send NMI to virtual cpu(s) specified by this mask.
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*
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* Returns 0 for success, or EINVAL for invalid vcpu_mask.
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*/
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static inline unsigned int fh_send_nmi(unsigned int vcpu_mask)
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{
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register uintptr_t r11 __asm__("r11");
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register uintptr_t r3 __asm__("r3");
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r11 = FH_HCALL_TOKEN(FH_SEND_NMI);
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r3 = vcpu_mask;
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__asm__ __volatile__ ("sc 1"
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: "+r" (r11), "+r" (r3)
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: : EV_HCALL_CLOBBERS1
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);
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return r3;
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}
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/* Arbitrary limits to avoid excessive memory allocation in hypervisor */
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#define FH_DTPROP_MAX_PATHLEN 4096
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#define FH_DTPROP_MAX_PROPLEN 32768
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/**
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* fh_partiton_get_dtprop - get a property from a guest device tree.
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* @handle: handle of partition whose device tree is to be accessed
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* @dtpath_addr: physical address of device tree path to access
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* @propname_addr: physical address of name of property
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* @propvalue_addr: physical address of property value buffer
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* @propvalue_len: length of buffer on entry, length of property on return
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*
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* Returns zero on success, non-zero on error.
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*/
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static inline unsigned int fh_partition_get_dtprop(int handle,
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uint64_t dtpath_addr,
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uint64_t propname_addr,
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uint64_t propvalue_addr,
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uint32_t *propvalue_len)
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{
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register uintptr_t r11 __asm__("r11");
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register uintptr_t r3 __asm__("r3");
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register uintptr_t r4 __asm__("r4");
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register uintptr_t r5 __asm__("r5");
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register uintptr_t r6 __asm__("r6");
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register uintptr_t r7 __asm__("r7");
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register uintptr_t r8 __asm__("r8");
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register uintptr_t r9 __asm__("r9");
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register uintptr_t r10 __asm__("r10");
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r11 = FH_HCALL_TOKEN(FH_PARTITION_GET_DTPROP);
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r3 = handle;
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#ifdef CONFIG_PHYS_64BIT
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r4 = dtpath_addr >> 32;
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r6 = propname_addr >> 32;
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r8 = propvalue_addr >> 32;
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#else
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r4 = 0;
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r6 = 0;
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r8 = 0;
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#endif
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r5 = (uint32_t)dtpath_addr;
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r7 = (uint32_t)propname_addr;
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r9 = (uint32_t)propvalue_addr;
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r10 = *propvalue_len;
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__asm__ __volatile__ ("sc 1"
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: "+r" (r11),
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"+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), "+r" (r7),
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"+r" (r8), "+r" (r9), "+r" (r10)
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: : EV_HCALL_CLOBBERS8
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);
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*propvalue_len = r4;
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return r3;
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}
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/**
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* Set a property in a guest device tree.
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* @handle: handle of partition whose device tree is to be accessed
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* @dtpath_addr: physical address of device tree path to access
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* @propname_addr: physical address of name of property
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* @propvalue_addr: physical address of property value
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* @propvalue_len: length of property
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*
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* Returns zero on success, non-zero on error.
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*/
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static inline unsigned int fh_partition_set_dtprop(int handle,
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uint64_t dtpath_addr,
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uint64_t propname_addr,
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uint64_t propvalue_addr,
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uint32_t propvalue_len)
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{
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register uintptr_t r11 __asm__("r11");
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register uintptr_t r3 __asm__("r3");
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register uintptr_t r4 __asm__("r4");
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register uintptr_t r6 __asm__("r6");
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register uintptr_t r8 __asm__("r8");
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register uintptr_t r5 __asm__("r5");
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register uintptr_t r7 __asm__("r7");
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register uintptr_t r9 __asm__("r9");
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register uintptr_t r10 __asm__("r10");
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r11 = FH_HCALL_TOKEN(FH_PARTITION_SET_DTPROP);
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r3 = handle;
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#ifdef CONFIG_PHYS_64BIT
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r4 = dtpath_addr >> 32;
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r6 = propname_addr >> 32;
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r8 = propvalue_addr >> 32;
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#else
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r4 = 0;
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r6 = 0;
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r8 = 0;
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#endif
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r5 = (uint32_t)dtpath_addr;
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r7 = (uint32_t)propname_addr;
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r9 = (uint32_t)propvalue_addr;
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r10 = propvalue_len;
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__asm__ __volatile__ ("sc 1"
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: "+r" (r11),
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"+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), "+r" (r7),
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"+r" (r8), "+r" (r9), "+r" (r10)
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: : EV_HCALL_CLOBBERS8
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);
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return r3;
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}
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/**
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* fh_partition_restart - reboot the current partition
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* @partition: partition ID
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*
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* Returns an error code if reboot failed. Does not return if it succeeds.
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*/
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static inline unsigned int fh_partition_restart(unsigned int partition)
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{
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register uintptr_t r11 __asm__("r11");
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register uintptr_t r3 __asm__("r3");
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r11 = FH_HCALL_TOKEN(FH_PARTITION_RESTART);
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r3 = partition;
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__asm__ __volatile__ ("sc 1"
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: "+r" (r11), "+r" (r3)
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: : EV_HCALL_CLOBBERS1
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);
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return r3;
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}
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#define FH_PARTITION_STOPPED 0
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#define FH_PARTITION_RUNNING 1
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#define FH_PARTITION_STARTING 2
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#define FH_PARTITION_STOPPING 3
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#define FH_PARTITION_PAUSING 4
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#define FH_PARTITION_PAUSED 5
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#define FH_PARTITION_RESUMING 6
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/**
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* fh_partition_get_status - gets the status of a partition
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* @partition: partition ID
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* @status: returned status code
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*
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* Returns 0 for success, or an error code.
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*/
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static inline unsigned int fh_partition_get_status(unsigned int partition,
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unsigned int *status)
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{
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register uintptr_t r11 __asm__("r11");
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register uintptr_t r3 __asm__("r3");
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register uintptr_t r4 __asm__("r4");
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r11 = FH_HCALL_TOKEN(FH_PARTITION_GET_STATUS);
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r3 = partition;
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__asm__ __volatile__ ("sc 1"
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: "+r" (r11), "+r" (r3), "=r" (r4)
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: : EV_HCALL_CLOBBERS2
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);
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*status = r4;
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return r3;
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}
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/**
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* fh_partition_start - boots and starts execution of the specified partition
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* @partition: partition ID
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* @entry_point: guest physical address to start execution
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*
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* The hypervisor creates a 1-to-1 virtual/physical IMA mapping, so at boot
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* time, guest physical address are the same as guest virtual addresses.
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*
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* Returns 0 for success, or an error code.
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*/
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static inline unsigned int fh_partition_start(unsigned int partition,
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uint32_t entry_point, int load)
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{
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register uintptr_t r11 __asm__("r11");
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register uintptr_t r3 __asm__("r3");
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register uintptr_t r4 __asm__("r4");
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register uintptr_t r5 __asm__("r5");
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r11 = FH_HCALL_TOKEN(FH_PARTITION_START);
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r3 = partition;
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r4 = entry_point;
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r5 = load;
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__asm__ __volatile__ ("sc 1"
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: "+r" (r11), "+r" (r3), "+r" (r4), "+r" (r5)
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: : EV_HCALL_CLOBBERS3
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);
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return r3;
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}
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/**
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* fh_partition_stop - stops another partition
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* @partition: partition ID
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*
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* Returns 0 for success, or an error code.
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*/
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static inline unsigned int fh_partition_stop(unsigned int partition)
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{
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register uintptr_t r11 __asm__("r11");
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register uintptr_t r3 __asm__("r3");
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r11 = FH_HCALL_TOKEN(FH_PARTITION_STOP);
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r3 = partition;
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__asm__ __volatile__ ("sc 1"
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: "+r" (r11), "+r" (r3)
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: : EV_HCALL_CLOBBERS1
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);
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return r3;
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}
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/**
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* struct fh_sg_list: definition of the fh_partition_memcpy S/G list
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* @source: guest physical address to copy from
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* @target: guest physical address to copy to
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* @size: number of bytes to copy
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* @reserved: reserved, must be zero
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*
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* The scatter/gather list for fh_partition_memcpy() is an array of these
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* structures. The array must be guest physically contiguous.
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*
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* This structure must be aligned on 32-byte boundary, so that no single
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* strucuture can span two pages.
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*/
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struct fh_sg_list {
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uint64_t source; /**< guest physical address to copy from */
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uint64_t target; /**< guest physical address to copy to */
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uint64_t size; /**< number of bytes to copy */
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uint64_t reserved; /**< reserved, must be zero */
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} __attribute__ ((aligned(32)));
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/**
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* fh_partition_memcpy - copies data from one guest to another
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* @source: the ID of the partition to copy from
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* @target: the ID of the partition to copy to
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* @sg_list: guest physical address of an array of &fh_sg_list structures
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* @count: the number of entries in @sg_list
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*
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* Returns 0 for success, or an error code.
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*/
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static inline unsigned int fh_partition_memcpy(unsigned int source,
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unsigned int target, phys_addr_t sg_list, unsigned int count)
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{
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register uintptr_t r11 __asm__("r11");
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register uintptr_t r3 __asm__("r3");
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register uintptr_t r4 __asm__("r4");
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register uintptr_t r5 __asm__("r5");
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register uintptr_t r6 __asm__("r6");
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register uintptr_t r7 __asm__("r7");
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r11 = FH_HCALL_TOKEN(FH_PARTITION_MEMCPY);
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r3 = source;
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r4 = target;
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r5 = (uint32_t) sg_list;
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#ifdef CONFIG_PHYS_64BIT
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r6 = sg_list >> 32;
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#else
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r6 = 0;
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#endif
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r7 = count;
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__asm__ __volatile__ ("sc 1"
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: "+r" (r11),
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"+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), "+r" (r7)
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: : EV_HCALL_CLOBBERS5
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);
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return r3;
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}
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/**
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* fh_dma_enable - enable DMA for the specified device
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* @liodn: the LIODN of the I/O device for which to enable DMA
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*
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* Returns 0 for success, or an error code.
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*/
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static inline unsigned int fh_dma_enable(unsigned int liodn)
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{
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register uintptr_t r11 __asm__("r11");
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register uintptr_t r3 __asm__("r3");
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r11 = FH_HCALL_TOKEN(FH_DMA_ENABLE);
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r3 = liodn;
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__asm__ __volatile__ ("sc 1"
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: "+r" (r11), "+r" (r3)
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: : EV_HCALL_CLOBBERS1
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);
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return r3;
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}
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/**
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* fh_dma_disable - disable DMA for the specified device
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* @liodn: the LIODN of the I/O device for which to disable DMA
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*
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* Returns 0 for success, or an error code.
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*/
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static inline unsigned int fh_dma_disable(unsigned int liodn)
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{
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register uintptr_t r11 __asm__("r11");
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register uintptr_t r3 __asm__("r3");
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r11 = FH_HCALL_TOKEN(FH_DMA_DISABLE);
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r3 = liodn;
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__asm__ __volatile__ ("sc 1"
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: "+r" (r11), "+r" (r3)
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: : EV_HCALL_CLOBBERS1
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);
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return r3;
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}
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/**
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* fh_vmpic_get_msir - returns the MPIC-MSI register value
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* @interrupt: the interrupt number
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* @msir_val: returned MPIC-MSI register value
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*
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* Returns 0 for success, or an error code.
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*/
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static inline unsigned int fh_vmpic_get_msir(unsigned int interrupt,
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unsigned int *msir_val)
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{
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register uintptr_t r11 __asm__("r11");
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register uintptr_t r3 __asm__("r3");
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register uintptr_t r4 __asm__("r4");
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r11 = FH_HCALL_TOKEN(FH_VMPIC_GET_MSIR);
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r3 = interrupt;
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__asm__ __volatile__ ("sc 1"
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: "+r" (r11), "+r" (r3), "=r" (r4)
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: : EV_HCALL_CLOBBERS2
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);
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*msir_val = r4;
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return r3;
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}
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/**
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* fh_system_reset - reset the system
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*
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* Returns 0 for success, or an error code.
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*/
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static inline unsigned int fh_system_reset(void)
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{
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register uintptr_t r11 __asm__("r11");
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register uintptr_t r3 __asm__("r3");
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r11 = FH_HCALL_TOKEN(FH_SYSTEM_RESET);
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__asm__ __volatile__ ("sc 1"
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: "+r" (r11), "=r" (r3)
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: : EV_HCALL_CLOBBERS1
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);
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return r3;
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}
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/**
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* fh_err_get_info - get platform error information
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* @queue id:
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* 0 for guest error event queue
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* 1 for global error event queue
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*
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* @pointer to store the platform error data:
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* platform error data is returned in registers r4 - r11
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*
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* Returns 0 for success, or an error code.
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*/
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static inline unsigned int fh_err_get_info(int queue, uint32_t *bufsize,
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uint32_t addr_hi, uint32_t addr_lo, int peek)
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{
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register uintptr_t r11 __asm__("r11");
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register uintptr_t r3 __asm__("r3");
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register uintptr_t r4 __asm__("r4");
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register uintptr_t r5 __asm__("r5");
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register uintptr_t r6 __asm__("r6");
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register uintptr_t r7 __asm__("r7");
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r11 = FH_HCALL_TOKEN(FH_ERR_GET_INFO);
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r3 = queue;
|
|
r4 = *bufsize;
|
|
r5 = addr_hi;
|
|
r6 = addr_lo;
|
|
r7 = peek;
|
|
|
|
__asm__ __volatile__ ("sc 1"
|
|
: "+r" (r11), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6),
|
|
"+r" (r7)
|
|
: : EV_HCALL_CLOBBERS5
|
|
);
|
|
|
|
*bufsize = r4;
|
|
|
|
return r3;
|
|
}
|
|
|
|
|
|
#define FH_VCPU_RUN 0
|
|
#define FH_VCPU_IDLE 1
|
|
#define FH_VCPU_NAP 2
|
|
|
|
/**
|
|
* fh_get_core_state - get the state of a vcpu
|
|
*
|
|
* @handle: handle of partition containing the vcpu
|
|
* @vcpu: vcpu number within the partition
|
|
* @state:the current state of the vcpu, see FH_VCPU_*
|
|
*
|
|
* Returns 0 for success, or an error code.
|
|
*/
|
|
static inline unsigned int fh_get_core_state(unsigned int handle,
|
|
unsigned int vcpu, unsigned int *state)
|
|
{
|
|
register uintptr_t r11 __asm__("r11");
|
|
register uintptr_t r3 __asm__("r3");
|
|
register uintptr_t r4 __asm__("r4");
|
|
|
|
r11 = FH_HCALL_TOKEN(FH_GET_CORE_STATE);
|
|
r3 = handle;
|
|
r4 = vcpu;
|
|
|
|
__asm__ __volatile__ ("sc 1"
|
|
: "+r" (r11), "+r" (r3), "+r" (r4)
|
|
: : EV_HCALL_CLOBBERS2
|
|
);
|
|
|
|
*state = r4;
|
|
return r3;
|
|
}
|
|
|
|
/**
|
|
* fh_enter_nap - enter nap on a vcpu
|
|
*
|
|
* Note that though the API supports entering nap on a vcpu other
|
|
* than the caller, this may not be implmented and may return EINVAL.
|
|
*
|
|
* @handle: handle of partition containing the vcpu
|
|
* @vcpu: vcpu number within the partition
|
|
*
|
|
* Returns 0 for success, or an error code.
|
|
*/
|
|
static inline unsigned int fh_enter_nap(unsigned int handle, unsigned int vcpu)
|
|
{
|
|
register uintptr_t r11 __asm__("r11");
|
|
register uintptr_t r3 __asm__("r3");
|
|
register uintptr_t r4 __asm__("r4");
|
|
|
|
r11 = FH_HCALL_TOKEN(FH_ENTER_NAP);
|
|
r3 = handle;
|
|
r4 = vcpu;
|
|
|
|
__asm__ __volatile__ ("sc 1"
|
|
: "+r" (r11), "+r" (r3), "+r" (r4)
|
|
: : EV_HCALL_CLOBBERS2
|
|
);
|
|
|
|
return r3;
|
|
}
|
|
|
|
/**
|
|
* fh_exit_nap - exit nap on a vcpu
|
|
* @handle: handle of partition containing the vcpu
|
|
* @vcpu: vcpu number within the partition
|
|
*
|
|
* Returns 0 for success, or an error code.
|
|
*/
|
|
static inline unsigned int fh_exit_nap(unsigned int handle, unsigned int vcpu)
|
|
{
|
|
register uintptr_t r11 __asm__("r11");
|
|
register uintptr_t r3 __asm__("r3");
|
|
register uintptr_t r4 __asm__("r4");
|
|
|
|
r11 = FH_HCALL_TOKEN(FH_EXIT_NAP);
|
|
r3 = handle;
|
|
r4 = vcpu;
|
|
|
|
__asm__ __volatile__ ("sc 1"
|
|
: "+r" (r11), "+r" (r3), "+r" (r4)
|
|
: : EV_HCALL_CLOBBERS2
|
|
);
|
|
|
|
return r3;
|
|
}
|
|
/**
|
|
* fh_claim_device - claim a "claimable" shared device
|
|
* @handle: fsl,hv-device-handle of node to claim
|
|
*
|
|
* Returns 0 for success, or an error code.
|
|
*/
|
|
static inline unsigned int fh_claim_device(unsigned int handle)
|
|
{
|
|
register uintptr_t r11 __asm__("r11");
|
|
register uintptr_t r3 __asm__("r3");
|
|
|
|
r11 = FH_HCALL_TOKEN(FH_CLAIM_DEVICE);
|
|
r3 = handle;
|
|
|
|
__asm__ __volatile__ ("sc 1"
|
|
: "+r" (r11), "+r" (r3)
|
|
: : EV_HCALL_CLOBBERS1
|
|
);
|
|
|
|
return r3;
|
|
}
|
|
|
|
/**
|
|
* Run deferred DMA disabling on a partition's private devices
|
|
*
|
|
* This applies to devices which a partition owns either privately,
|
|
* or which are claimable and still actively owned by that partition,
|
|
* and which do not have the no-dma-disable property.
|
|
*
|
|
* @handle: partition (must be stopped) whose DMA is to be disabled
|
|
*
|
|
* Returns 0 for success, or an error code.
|
|
*/
|
|
static inline unsigned int fh_partition_stop_dma(unsigned int handle)
|
|
{
|
|
register uintptr_t r11 __asm__("r11");
|
|
register uintptr_t r3 __asm__("r3");
|
|
|
|
r11 = FH_HCALL_TOKEN(FH_PARTITION_STOP_DMA);
|
|
r3 = handle;
|
|
|
|
__asm__ __volatile__ ("sc 1"
|
|
: "+r" (r11), "+r" (r3)
|
|
: : EV_HCALL_CLOBBERS1
|
|
);
|
|
|
|
return r3;
|
|
}
|
|
#endif
|