forked from Minki/linux
b5a26e4db8
This patch implements xen version of pv_init_ops to do various xen initialization. This patch also includes ia64 counter part of x86 xen early printk support patches. Signed-off-by: Akio Takebe <takebe_akio@jp.fujitsu.com> Signed-off-by: Alex Williamson <alex.williamson@hp.com> 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>
97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
/******************************************************************************
|
|
* arch/ia64/xen/hypervisor.c
|
|
*
|
|
* Copyright (c) 2006 Isaku Yamahata <yamahata at valinux co jp>
|
|
* VA Linux Systems Japan K.K.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#include <linux/efi.h>
|
|
#include <asm/xen/hypervisor.h>
|
|
#include <asm/xen/privop.h>
|
|
|
|
#include "irq_xen.h"
|
|
|
|
struct shared_info *HYPERVISOR_shared_info __read_mostly =
|
|
(struct shared_info *)XSI_BASE;
|
|
EXPORT_SYMBOL(HYPERVISOR_shared_info);
|
|
|
|
DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu);
|
|
|
|
struct start_info *xen_start_info;
|
|
EXPORT_SYMBOL(xen_start_info);
|
|
|
|
EXPORT_SYMBOL(xen_domain_type);
|
|
|
|
EXPORT_SYMBOL(__hypercall);
|
|
|
|
/* Stolen from arch/x86/xen/enlighten.c */
|
|
/*
|
|
* Flag to determine whether vcpu info placement is available on all
|
|
* VCPUs. We assume it is to start with, and then set it to zero on
|
|
* the first failure. This is because it can succeed on some VCPUs
|
|
* and not others, since it can involve hypervisor memory allocation,
|
|
* or because the guest failed to guarantee all the appropriate
|
|
* constraints on all VCPUs (ie buffer can't cross a page boundary).
|
|
*
|
|
* Note that any particular CPU may be using a placed vcpu structure,
|
|
* but we can only optimise if the all are.
|
|
*
|
|
* 0: not available, 1: available
|
|
*/
|
|
|
|
static void __init xen_vcpu_setup(int cpu)
|
|
{
|
|
/*
|
|
* WARNING:
|
|
* before changing MAX_VIRT_CPUS,
|
|
* check that shared_info fits on a page
|
|
*/
|
|
BUILD_BUG_ON(sizeof(struct shared_info) > PAGE_SIZE);
|
|
per_cpu(xen_vcpu, cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu];
|
|
}
|
|
|
|
void __init xen_setup_vcpu_info_placement(void)
|
|
{
|
|
int cpu;
|
|
|
|
for_each_possible_cpu(cpu)
|
|
xen_vcpu_setup(cpu);
|
|
}
|
|
|
|
void __cpuinit
|
|
xen_cpu_init(void)
|
|
{
|
|
xen_smp_intr_init();
|
|
}
|
|
|
|
/**************************************************************************
|
|
* opt feature
|
|
*/
|
|
void
|
|
xen_ia64_enable_opt_feature(void)
|
|
{
|
|
/* Enable region 7 identity map optimizations in Xen */
|
|
struct xen_ia64_opt_feature optf;
|
|
|
|
optf.cmd = XEN_IA64_OPTF_IDENT_MAP_REG7;
|
|
optf.on = XEN_IA64_OPTF_ON;
|
|
optf.pgprot = pgprot_val(PAGE_KERNEL);
|
|
optf.key = 0; /* No key on linux. */
|
|
HYPERVISOR_opt_feature(&optf);
|
|
}
|