ia64/xen: define helper functions for xen hypercalls.
introduce helper functions for xen hypercalls which traps to hypervisor. Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Isaku Yamahata
Tony Luck
Родитель
67fe8d27a8
Коммит
ed50bd6096
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/******************************************************************************
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* hypercall.h
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*
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* Linux-specific hypervisor handling.
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*
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* Copyright (c) 2002-2004, K A Fraser
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation; or, when distributed
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* separately from the Linux kernel or incorporated into other
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* software packages, subject to the following license:
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this source file (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy, modify,
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* merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef _ASM_IA64_XEN_HYPERCALL_H
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#define _ASM_IA64_XEN_HYPERCALL_H
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#include <xen/interface/xen.h>
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#include <xen/interface/physdev.h>
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#include <xen/interface/sched.h>
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#include <asm/xen/xcom_hcall.h>
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struct xencomm_handle;
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extern unsigned long __hypercall(unsigned long a1, unsigned long a2,
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unsigned long a3, unsigned long a4,
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unsigned long a5, unsigned long cmd);
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/*
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* Assembler stubs for hyper-calls.
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*/
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#define _hypercall0(type, name) \
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({ \
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long __res; \
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__res = __hypercall(0, 0, 0, 0, 0, __HYPERVISOR_##name);\
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(type)__res; \
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})
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#define _hypercall1(type, name, a1) \
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({ \
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long __res; \
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__res = __hypercall((unsigned long)a1, \
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0, 0, 0, 0, __HYPERVISOR_##name); \
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(type)__res; \
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})
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#define _hypercall2(type, name, a1, a2) \
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({ \
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long __res; \
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__res = __hypercall((unsigned long)a1, \
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(unsigned long)a2, \
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0, 0, 0, __HYPERVISOR_##name); \
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(type)__res; \
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})
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#define _hypercall3(type, name, a1, a2, a3) \
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({ \
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long __res; \
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__res = __hypercall((unsigned long)a1, \
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(unsigned long)a2, \
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(unsigned long)a3, \
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0, 0, __HYPERVISOR_##name); \
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(type)__res; \
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})
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#define _hypercall4(type, name, a1, a2, a3, a4) \
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({ \
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long __res; \
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__res = __hypercall((unsigned long)a1, \
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(unsigned long)a2, \
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(unsigned long)a3, \
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(unsigned long)a4, \
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0, __HYPERVISOR_##name); \
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(type)__res; \
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})
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#define _hypercall5(type, name, a1, a2, a3, a4, a5) \
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({ \
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long __res; \
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__res = __hypercall((unsigned long)a1, \
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(unsigned long)a2, \
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(unsigned long)a3, \
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(unsigned long)a4, \
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(unsigned long)a5, \
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__HYPERVISOR_##name); \
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(type)__res; \
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})
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static inline int
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xencomm_arch_hypercall_sched_op(int cmd, struct xencomm_handle *arg)
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{
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return _hypercall2(int, sched_op_new, cmd, arg);
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}
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static inline long
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HYPERVISOR_set_timer_op(u64 timeout)
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{
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unsigned long timeout_hi = (unsigned long)(timeout >> 32);
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unsigned long timeout_lo = (unsigned long)timeout;
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return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
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}
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static inline int
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xencomm_arch_hypercall_multicall(struct xencomm_handle *call_list,
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int nr_calls)
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{
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return _hypercall2(int, multicall, call_list, nr_calls);
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}
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static inline int
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xencomm_arch_hypercall_memory_op(unsigned int cmd, struct xencomm_handle *arg)
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{
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return _hypercall2(int, memory_op, cmd, arg);
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}
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static inline int
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xencomm_arch_hypercall_event_channel_op(int cmd, struct xencomm_handle *arg)
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{
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return _hypercall2(int, event_channel_op, cmd, arg);
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}
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static inline int
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xencomm_arch_hypercall_xen_version(int cmd, struct xencomm_handle *arg)
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{
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return _hypercall2(int, xen_version, cmd, arg);
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}
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static inline int
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xencomm_arch_hypercall_console_io(int cmd, int count,
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struct xencomm_handle *str)
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{
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return _hypercall3(int, console_io, cmd, count, str);
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}
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static inline int
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xencomm_arch_hypercall_physdev_op(int cmd, struct xencomm_handle *arg)
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{
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return _hypercall2(int, physdev_op, cmd, arg);
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}
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static inline int
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xencomm_arch_hypercall_grant_table_op(unsigned int cmd,
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struct xencomm_handle *uop,
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unsigned int count)
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{
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return _hypercall3(int, grant_table_op, cmd, uop, count);
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}
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int HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count);
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extern int xencomm_arch_hypercall_suspend(struct xencomm_handle *arg);
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static inline int
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xencomm_arch_hypercall_callback_op(int cmd, struct xencomm_handle *arg)
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{
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return _hypercall2(int, callback_op, cmd, arg);
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}
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static inline long
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xencomm_arch_hypercall_vcpu_op(int cmd, int cpu, void *arg)
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{
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return _hypercall3(long, vcpu_op, cmd, cpu, arg);
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}
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static inline int
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HYPERVISOR_physdev_op(int cmd, void *arg)
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{
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switch (cmd) {
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case PHYSDEVOP_eoi:
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return _hypercall1(int, ia64_fast_eoi,
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((struct physdev_eoi *)arg)->irq);
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default:
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return xencomm_hypercall_physdev_op(cmd, arg);
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}
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}
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static inline long
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xencomm_arch_hypercall_opt_feature(struct xencomm_handle *arg)
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{
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return _hypercall1(long, opt_feature, arg);
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}
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/* for balloon driver */
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#define HYPERVISOR_update_va_mapping(va, new_val, flags) (0)
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/* Use xencomm to do hypercalls. */
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#define HYPERVISOR_sched_op xencomm_hypercall_sched_op
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#define HYPERVISOR_event_channel_op xencomm_hypercall_event_channel_op
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#define HYPERVISOR_callback_op xencomm_hypercall_callback_op
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#define HYPERVISOR_multicall xencomm_hypercall_multicall
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#define HYPERVISOR_xen_version xencomm_hypercall_xen_version
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#define HYPERVISOR_console_io xencomm_hypercall_console_io
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#define HYPERVISOR_memory_op xencomm_hypercall_memory_op
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#define HYPERVISOR_suspend xencomm_hypercall_suspend
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#define HYPERVISOR_vcpu_op xencomm_hypercall_vcpu_op
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#define HYPERVISOR_opt_feature xencomm_hypercall_opt_feature
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/* to compile gnttab_copy_grant_page() in drivers/xen/core/gnttab.c */
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#define HYPERVISOR_mmu_update(req, count, success_count, domid) ({ BUG(); 0; })
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static inline int
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HYPERVISOR_shutdown(
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unsigned int reason)
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{
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struct sched_shutdown sched_shutdown = {
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.reason = reason
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};
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int rc = HYPERVISOR_sched_op(SCHEDOP_shutdown, &sched_shutdown);
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return rc;
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}
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/* for netfront.c, netback.c */
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#define MULTI_UVMFLAGS_INDEX 0 /* XXX any value */
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static inline void
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MULTI_update_va_mapping(
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struct multicall_entry *mcl, unsigned long va,
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pte_t new_val, unsigned long flags)
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{
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mcl->op = __HYPERVISOR_update_va_mapping;
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mcl->result = 0;
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}
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static inline void
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MULTI_grant_table_op(struct multicall_entry *mcl, unsigned int cmd,
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void *uop, unsigned int count)
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{
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mcl->op = __HYPERVISOR_grant_table_op;
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mcl->args[0] = cmd;
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mcl->args[1] = (unsigned long)uop;
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mcl->args[2] = count;
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}
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static inline void
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MULTI_mmu_update(struct multicall_entry *mcl, struct mmu_update *req,
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int count, int *success_count, domid_t domid)
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{
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mcl->op = __HYPERVISOR_mmu_update;
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mcl->args[0] = (unsigned long)req;
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mcl->args[1] = count;
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mcl->args[2] = (unsigned long)success_count;
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mcl->args[3] = domid;
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}
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#endif /* _ASM_IA64_XEN_HYPERCALL_H */
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@ -0,0 +1,129 @@
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#ifndef _ASM_IA64_XEN_PRIVOP_H
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#define _ASM_IA64_XEN_PRIVOP_H
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/*
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* Copyright (C) 2005 Hewlett-Packard Co
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* Dan Magenheimer <dan.magenheimer@hp.com>
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*
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* Paravirtualizations of privileged operations for Xen/ia64
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*
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*
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* inline privop and paravirt_alt support
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* Copyright (c) 2007 Isaku Yamahata <yamahata at valinux co jp>
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* VA Linux Systems Japan K.K.
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*
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*/
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#ifndef __ASSEMBLY__
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#include <linux/types.h> /* arch-ia64.h requires uint64_t */
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#endif
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#include <asm/xen/interface.h>
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/* At 1 MB, before per-cpu space but still addressable using addl instead
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of movl. */
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#define XSI_BASE 0xfffffffffff00000
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/* Address of mapped regs. */
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#define XMAPPEDREGS_BASE (XSI_BASE + XSI_SIZE)
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#ifdef __ASSEMBLY__
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#define XEN_HYPER_RFI break HYPERPRIVOP_RFI
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#define XEN_HYPER_RSM_PSR_DT break HYPERPRIVOP_RSM_DT
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#define XEN_HYPER_SSM_PSR_DT break HYPERPRIVOP_SSM_DT
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#define XEN_HYPER_COVER break HYPERPRIVOP_COVER
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#define XEN_HYPER_ITC_D break HYPERPRIVOP_ITC_D
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#define XEN_HYPER_ITC_I break HYPERPRIVOP_ITC_I
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#define XEN_HYPER_SSM_I break HYPERPRIVOP_SSM_I
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#define XEN_HYPER_GET_IVR break HYPERPRIVOP_GET_IVR
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#define XEN_HYPER_THASH break HYPERPRIVOP_THASH
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#define XEN_HYPER_ITR_D break HYPERPRIVOP_ITR_D
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#define XEN_HYPER_SET_KR break HYPERPRIVOP_SET_KR
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#define XEN_HYPER_GET_PSR break HYPERPRIVOP_GET_PSR
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#define XEN_HYPER_SET_RR0_TO_RR4 break HYPERPRIVOP_SET_RR0_TO_RR4
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#define XSI_IFS (XSI_BASE + XSI_IFS_OFS)
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#define XSI_PRECOVER_IFS (XSI_BASE + XSI_PRECOVER_IFS_OFS)
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#define XSI_IFA (XSI_BASE + XSI_IFA_OFS)
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#define XSI_ISR (XSI_BASE + XSI_ISR_OFS)
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#define XSI_IIM (XSI_BASE + XSI_IIM_OFS)
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#define XSI_ITIR (XSI_BASE + XSI_ITIR_OFS)
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#define XSI_PSR_I_ADDR (XSI_BASE + XSI_PSR_I_ADDR_OFS)
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#define XSI_PSR_IC (XSI_BASE + XSI_PSR_IC_OFS)
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#define XSI_IPSR (XSI_BASE + XSI_IPSR_OFS)
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#define XSI_IIP (XSI_BASE + XSI_IIP_OFS)
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#define XSI_B1NAT (XSI_BASE + XSI_B1NATS_OFS)
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#define XSI_BANK1_R16 (XSI_BASE + XSI_BANK1_R16_OFS)
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#define XSI_BANKNUM (XSI_BASE + XSI_BANKNUM_OFS)
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#define XSI_IHA (XSI_BASE + XSI_IHA_OFS)
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#endif
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#ifndef __ASSEMBLY__
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/************************************************/
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/* Instructions paravirtualized for correctness */
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/************************************************/
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/* "fc" and "thash" are privilege-sensitive instructions, meaning they
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* may have different semantics depending on whether they are executed
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* at PL0 vs PL!=0. When paravirtualized, these instructions mustn't
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* be allowed to execute directly, lest incorrect semantics result. */
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extern void xen_fc(unsigned long addr);
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extern unsigned long xen_thash(unsigned long addr);
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/* Note that "ttag" and "cover" are also privilege-sensitive; "ttag"
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* is not currently used (though it may be in a long-format VHPT system!)
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* and the semantics of cover only change if psr.ic is off which is very
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* rare (and currently non-existent outside of assembly code */
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/* There are also privilege-sensitive registers. These registers are
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* readable at any privilege level but only writable at PL0. */
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extern unsigned long xen_get_cpuid(int index);
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extern unsigned long xen_get_pmd(int index);
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extern unsigned long xen_get_eflag(void); /* see xen_ia64_getreg */
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extern void xen_set_eflag(unsigned long); /* see xen_ia64_setreg */
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/************************************************/
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/* Instructions paravirtualized for performance */
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/************************************************/
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/* Xen uses memory-mapped virtual privileged registers for access to many
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* performance-sensitive privileged registers. Some, like the processor
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* status register (psr), are broken up into multiple memory locations.
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* Others, like "pend", are abstractions based on privileged registers.
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* "Pend" is guaranteed to be set if reading cr.ivr would return a
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* (non-spurious) interrupt. */
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#define XEN_MAPPEDREGS ((struct mapped_regs *)XMAPPEDREGS_BASE)
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#define XSI_PSR_I \
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(*XEN_MAPPEDREGS->interrupt_mask_addr)
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#define xen_get_virtual_psr_i() \
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(!XSI_PSR_I)
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#define xen_set_virtual_psr_i(_val) \
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({ XSI_PSR_I = (uint8_t)(_val) ? 0 : 1; })
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#define xen_set_virtual_psr_ic(_val) \
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({ XEN_MAPPEDREGS->interrupt_collection_enabled = _val ? 1 : 0; })
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#define xen_get_virtual_pend() \
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(*(((uint8_t *)XEN_MAPPEDREGS->interrupt_mask_addr) - 1))
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/* Although all privileged operations can be left to trap and will
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* be properly handled by Xen, some are frequent enough that we use
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* hyperprivops for performance. */
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extern unsigned long xen_get_psr(void);
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extern unsigned long xen_get_ivr(void);
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extern unsigned long xen_get_tpr(void);
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extern void xen_hyper_ssm_i(void);
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extern void xen_set_itm(unsigned long);
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extern void xen_set_tpr(unsigned long);
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extern void xen_eoi(unsigned long);
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extern unsigned long xen_get_rr(unsigned long index);
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extern void xen_set_rr(unsigned long index, unsigned long val);
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extern void xen_set_rr0_to_rr4(unsigned long val0, unsigned long val1,
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unsigned long val2, unsigned long val3,
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unsigned long val4);
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extern void xen_set_kr(unsigned long index, unsigned long val);
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extern void xen_ptcga(unsigned long addr, unsigned long size);
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#endif /* !__ASSEMBLY__ */
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#endif /* _ASM_IA64_XEN_PRIVOP_H */
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@ -0,0 +1,5 @@
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#
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# Makefile for Xen components
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#
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obj-y := hypercall.o
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@ -0,0 +1,91 @@
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/*
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* Support routines for Xen hypercalls
|
||||
*
|
||||
* Copyright (C) 2005 Dan Magenheimer <dan.magenheimer@hp.com>
|
||||
* Copyright (C) 2008 Yaozu (Eddie) Dong <eddie.dong@intel.com>
|
||||
*/
|
||||
|
||||
#include <asm/asmmacro.h>
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#include <asm/intrinsics.h>
|
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#include <asm/xen/privop.h>
|
||||
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||||
/*
|
||||
* Hypercalls without parameter.
|
||||
*/
|
||||
#define __HCALL0(name,hcall) \
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GLOBAL_ENTRY(name); \
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||||
break hcall; \
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||||
br.ret.sptk.many rp; \
|
||||
END(name)
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||||
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||||
/*
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* Hypercalls with 1 parameter.
|
||||
*/
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||||
#define __HCALL1(name,hcall) \
|
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GLOBAL_ENTRY(name); \
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||||
mov r8=r32; \
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break hcall; \
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||||
br.ret.sptk.many rp; \
|
||||
END(name)
|
||||
|
||||
/*
|
||||
* Hypercalls with 2 parameters.
|
||||
*/
|
||||
#define __HCALL2(name,hcall) \
|
||||
GLOBAL_ENTRY(name); \
|
||||
mov r8=r32; \
|
||||
mov r9=r33; \
|
||||
break hcall; \
|
||||
br.ret.sptk.many rp; \
|
||||
END(name)
|
||||
|
||||
__HCALL0(xen_get_psr, HYPERPRIVOP_GET_PSR)
|
||||
__HCALL0(xen_get_ivr, HYPERPRIVOP_GET_IVR)
|
||||
__HCALL0(xen_get_tpr, HYPERPRIVOP_GET_TPR)
|
||||
__HCALL0(xen_hyper_ssm_i, HYPERPRIVOP_SSM_I)
|
||||
|
||||
__HCALL1(xen_set_tpr, HYPERPRIVOP_SET_TPR)
|
||||
__HCALL1(xen_eoi, HYPERPRIVOP_EOI)
|
||||
__HCALL1(xen_thash, HYPERPRIVOP_THASH)
|
||||
__HCALL1(xen_set_itm, HYPERPRIVOP_SET_ITM)
|
||||
__HCALL1(xen_get_rr, HYPERPRIVOP_GET_RR)
|
||||
__HCALL1(xen_fc, HYPERPRIVOP_FC)
|
||||
__HCALL1(xen_get_cpuid, HYPERPRIVOP_GET_CPUID)
|
||||
__HCALL1(xen_get_pmd, HYPERPRIVOP_GET_PMD)
|
||||
|
||||
__HCALL2(xen_ptcga, HYPERPRIVOP_PTC_GA)
|
||||
__HCALL2(xen_set_rr, HYPERPRIVOP_SET_RR)
|
||||
__HCALL2(xen_set_kr, HYPERPRIVOP_SET_KR)
|
||||
|
||||
#ifdef CONFIG_IA32_SUPPORT
|
||||
__HCALL1(xen_get_eflag, HYPERPRIVOP_GET_EFLAG)
|
||||
__HCALL1(xen_set_eflag, HYPERPRIVOP_SET_EFLAG) // refer SDM vol1 3.1.8
|
||||
#endif /* CONFIG_IA32_SUPPORT */
|
||||
|
||||
GLOBAL_ENTRY(xen_set_rr0_to_rr4)
|
||||
mov r8=r32
|
||||
mov r9=r33
|
||||
mov r10=r34
|
||||
mov r11=r35
|
||||
mov r14=r36
|
||||
XEN_HYPER_SET_RR0_TO_RR4
|
||||
br.ret.sptk.many rp
|
||||
;;
|
||||
END(xen_set_rr0_to_rr4)
|
||||
|
||||
GLOBAL_ENTRY(xen_send_ipi)
|
||||
mov r14=r32
|
||||
mov r15=r33
|
||||
mov r2=0x400
|
||||
break 0x1000
|
||||
;;
|
||||
br.ret.sptk.many rp
|
||||
;;
|
||||
END(xen_send_ipi)
|
||||
|
||||
GLOBAL_ENTRY(__hypercall)
|
||||
mov r2=r37
|
||||
break 0x1000
|
||||
br.ret.sptk.many b0
|
||||
;;
|
||||
END(__hypercall)
|
||||
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