ia64/pv_ops/xen: define xen pv_init_ops for various xen initialization.
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>hifive-unleashed-5.1
Isaku Yamahata
Tony Luck
parent
080104cd0f
commit
b5a26e4db8
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@ -59,8 +59,22 @@ extern enum xen_domain_type xen_domain_type;
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/* deprecated. remove this */
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#define is_running_on_xen() (xen_domain_type == XEN_PV_DOMAIN)
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extern struct shared_info *HYPERVISOR_shared_info;
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extern struct start_info *xen_start_info;
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void __init xen_setup_vcpu_info_placement(void);
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void force_evtchn_callback(void);
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/* for drivers/xen/balloon/balloon.c */
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#ifdef CONFIG_XEN_SCRUB_PAGES
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#define scrub_pages(_p, _n) memset((void *)(_p), 0, (_n) << PAGE_SHIFT)
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#else
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#define scrub_pages(_p, _n) ((void)0)
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#endif
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/* For setup_arch() in arch/ia64/kernel/setup.c */
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void xen_ia64_enable_opt_feature(void);
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#else /* CONFIG_XEN */
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#define xen_domain() (0)
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@ -3,4 +3,4 @@
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#
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obj-y := hypercall.o xensetup.o xen_pv_ops.o \
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xencomm.o xcom_hcall.o grant-table.o
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hypervisor.o xencomm.o xcom_hcall.o grant-table.o
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@ -0,0 +1,96 @@
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/******************************************************************************
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* arch/ia64/xen/hypervisor.c
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*
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* Copyright (c) 2006 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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/efi.h>
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#include <asm/xen/hypervisor.h>
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#include <asm/xen/privop.h>
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#include "irq_xen.h"
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struct shared_info *HYPERVISOR_shared_info __read_mostly =
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(struct shared_info *)XSI_BASE;
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EXPORT_SYMBOL(HYPERVISOR_shared_info);
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DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu);
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struct start_info *xen_start_info;
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EXPORT_SYMBOL(xen_start_info);
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EXPORT_SYMBOL(xen_domain_type);
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EXPORT_SYMBOL(__hypercall);
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/* Stolen from arch/x86/xen/enlighten.c */
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/*
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* Flag to determine whether vcpu info placement is available on all
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* VCPUs. We assume it is to start with, and then set it to zero on
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* the first failure. This is because it can succeed on some VCPUs
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* and not others, since it can involve hypervisor memory allocation,
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* or because the guest failed to guarantee all the appropriate
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* constraints on all VCPUs (ie buffer can't cross a page boundary).
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*
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* Note that any particular CPU may be using a placed vcpu structure,
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* but we can only optimise if the all are.
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*
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* 0: not available, 1: available
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*/
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static void __init xen_vcpu_setup(int cpu)
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{
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/*
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* WARNING:
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* before changing MAX_VIRT_CPUS,
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* check that shared_info fits on a page
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*/
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BUILD_BUG_ON(sizeof(struct shared_info) > PAGE_SIZE);
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per_cpu(xen_vcpu, cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu];
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}
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void __init xen_setup_vcpu_info_placement(void)
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{
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int cpu;
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for_each_possible_cpu(cpu)
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xen_vcpu_setup(cpu);
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}
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void __cpuinit
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xen_cpu_init(void)
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{
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xen_smp_intr_init();
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}
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/**************************************************************************
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* opt feature
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*/
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void
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xen_ia64_enable_opt_feature(void)
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{
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/* Enable region 7 identity map optimizations in Xen */
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struct xen_ia64_opt_feature optf;
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optf.cmd = XEN_IA64_OPTF_IDENT_MAP_REG7;
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optf.on = XEN_IA64_OPTF_ON;
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optf.pgprot = pgprot_val(PAGE_KERNEL);
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optf.key = 0; /* No key on linux. */
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HYPERVISOR_opt_feature(&optf);
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}
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@ -53,6 +53,115 @@ xen_info_init(void)
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xen_info.kernel_rpl = rpl;
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}
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/***************************************************************************
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* pv_init_ops
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* initialization hooks.
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*/
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static void
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xen_panic_hypercall(struct unw_frame_info *info, void *arg)
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{
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current->thread.ksp = (__u64)info->sw - 16;
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HYPERVISOR_shutdown(SHUTDOWN_crash);
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/* we're never actually going to get here... */
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}
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static int
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xen_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
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{
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unw_init_running(xen_panic_hypercall, NULL);
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/* we're never actually going to get here... */
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return NOTIFY_DONE;
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}
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static struct notifier_block xen_panic_block = {
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xen_panic_event, NULL, 0 /* try to go last */
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};
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static void xen_pm_power_off(void)
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{
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local_irq_disable();
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HYPERVISOR_shutdown(SHUTDOWN_poweroff);
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}
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static void __init
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xen_banner(void)
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{
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printk(KERN_INFO
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"Running on Xen! pl = %d start_info_pfn=0x%lx nr_pages=%ld "
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"flags=0x%x\n",
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xen_info.kernel_rpl,
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HYPERVISOR_shared_info->arch.start_info_pfn,
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xen_start_info->nr_pages, xen_start_info->flags);
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}
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static int __init
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xen_reserve_memory(struct rsvd_region *region)
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{
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region->start = (unsigned long)__va(
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(HYPERVISOR_shared_info->arch.start_info_pfn << PAGE_SHIFT));
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region->end = region->start + PAGE_SIZE;
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return 1;
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}
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static void __init
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xen_arch_setup_early(void)
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{
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struct shared_info *s;
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BUG_ON(!xen_pv_domain());
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s = HYPERVISOR_shared_info;
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xen_start_info = __va(s->arch.start_info_pfn << PAGE_SHIFT);
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/* Must be done before any hypercall. */
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xencomm_initialize();
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xen_setup_features();
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/* Register a call for panic conditions. */
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atomic_notifier_chain_register(&panic_notifier_list,
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&xen_panic_block);
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pm_power_off = xen_pm_power_off;
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xen_ia64_enable_opt_feature();
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}
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static void __init
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xen_arch_setup_console(char **cmdline_p)
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{
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add_preferred_console("xenboot", 0, NULL);
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add_preferred_console("tty", 0, NULL);
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/* use hvc_xen */
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add_preferred_console("hvc", 0, NULL);
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#if !defined(CONFIG_VT) || !defined(CONFIG_DUMMY_CONSOLE)
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conswitchp = NULL;
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#endif
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}
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static int __init
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xen_arch_setup_nomca(void)
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{
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return 1;
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}
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static void __init
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xen_post_smp_prepare_boot_cpu(void)
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{
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xen_setup_vcpu_info_placement();
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}
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static const struct pv_init_ops xen_init_ops __initdata = {
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.banner = xen_banner,
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.reserve_memory = xen_reserve_memory,
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.arch_setup_early = xen_arch_setup_early,
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.arch_setup_console = xen_arch_setup_console,
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.arch_setup_nomca = xen_arch_setup_nomca,
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.post_smp_prepare_boot_cpu = xen_post_smp_prepare_boot_cpu,
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};
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/***************************************************************************
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* pv_ops initialization
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*/
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@ -62,4 +171,5 @@ xen_setup_pv_ops(void)
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{
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xen_info_init();
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pv_info = xen_info;
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pv_init_ops = xen_init_ops;
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}
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