ia64/pv_ops/xen: define xen pv_init_ops for various xen initialization. (b5a26e4d) · Commits · e / devices / android_kernel_oneplus_sm7250

arch/ia64/include/asm/xen/hypervisor.h

+14 −0

Original line number	Diff line number	Diff line
		@@ -59,8 +59,22 @@ extern enum xen_domain_type xen_domain_type;
		/* deprecated. remove this */
		#define is_running_on_xen() (xen_domain_type == XEN_PV_DOMAIN)

		extern struct shared_info *HYPERVISOR_shared_info;
		extern struct start_info *xen_start_info;

		void __init xen_setup_vcpu_info_placement(void);
		void force_evtchn_callback(void);

		/* for drivers/xen/balloon/balloon.c */
		#ifdef CONFIG_XEN_SCRUB_PAGES
		#define scrub_pages(_p, _n) memset((void *)(_p), 0, (_n) << PAGE_SHIFT)
		#else
		#define scrub_pages(_p, _n) ((void)0)
		#endif

		/* For setup_arch() in arch/ia64/kernel/setup.c */
		void xen_ia64_enable_opt_feature(void);

		#else /* CONFIG_XEN */

		#define xen_domain() (0)

arch/ia64/xen/Makefile

+1 −1

Original line number	Diff line number	Diff line
		@@ -3,4 +3,4 @@
		#

		obj-y := hypercall.o xensetup.o xen_pv_ops.o \
		xencomm.o xcom_hcall.o grant-table.o
		hypervisor.o xencomm.o xcom_hcall.o grant-table.o

arch/ia64/xen/hypervisor.c

0 → 100644

+96 −0

Original line number	Diff line number	Diff line
		/******************************************************************************
		* 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);
		}

arch/ia64/xen/xen_pv_ops.c

+110 −0

Original line number	Diff line number	Diff line
		@@ -53,6 +53,115 @@ xen_info_init(void)
		xen_info.kernel_rpl = rpl;
		}

		/***************************************************************************
		* pv_init_ops
		* initialization hooks.
		*/

		static void
		xen_panic_hypercall(struct unw_frame_info info, void arg)
		{
		current->thread.ksp = (__u64)info->sw - 16;
		HYPERVISOR_shutdown(SHUTDOWN_crash);
		/* we're never actually going to get here... */
		}

		static int
		xen_panic_event(struct notifier_block this, unsigned long event, void ptr)
		{
		unw_init_running(xen_panic_hypercall, NULL);
		/* we're never actually going to get here... */
		return NOTIFY_DONE;
		}

		static struct notifier_block xen_panic_block = {
		xen_panic_event, NULL, 0 /* try to go last */
		};

		static void xen_pm_power_off(void)
		{
		local_irq_disable();
		HYPERVISOR_shutdown(SHUTDOWN_poweroff);
		}

		static void __init
		xen_banner(void)
		{
		printk(KERN_INFO
		"Running on Xen! pl = %d start_info_pfn=0x%lx nr_pages=%ld "
		"flags=0x%x\n",
		xen_info.kernel_rpl,
		HYPERVISOR_shared_info->arch.start_info_pfn,
		xen_start_info->nr_pages, xen_start_info->flags);
		}

		static int __init
		xen_reserve_memory(struct rsvd_region *region)
		{
		region->start = (unsigned long)__va(
		(HYPERVISOR_shared_info->arch.start_info_pfn << PAGE_SHIFT));
		region->end = region->start + PAGE_SIZE;
		return 1;
		}

		static void __init
		xen_arch_setup_early(void)
		{
		struct shared_info *s;
		BUG_ON(!xen_pv_domain());

		s = HYPERVISOR_shared_info;
		xen_start_info = __va(s->arch.start_info_pfn << PAGE_SHIFT);

		/* Must be done before any hypercall. */
		xencomm_initialize();

		xen_setup_features();
		/* Register a call for panic conditions. */
		atomic_notifier_chain_register(&panic_notifier_list,
		&xen_panic_block);
		pm_power_off = xen_pm_power_off;

		xen_ia64_enable_opt_feature();
		}

		static void __init
		xen_arch_setup_console(char **cmdline_p)
		{
		add_preferred_console("xenboot", 0, NULL);
		add_preferred_console("tty", 0, NULL);
		/* use hvc_xen */
		add_preferred_console("hvc", 0, NULL);

		#if !defined(CONFIG_VT) \|\| !defined(CONFIG_DUMMY_CONSOLE)
		conswitchp = NULL;
		#endif
		}

		static int __init
		xen_arch_setup_nomca(void)
		{
		return 1;
		}

		static void __init
		xen_post_smp_prepare_boot_cpu(void)
		{
		xen_setup_vcpu_info_placement();
		}

		static const struct pv_init_ops xen_init_ops __initdata = {
		.banner = xen_banner,

		.reserve_memory = xen_reserve_memory,

		.arch_setup_early = xen_arch_setup_early,
		.arch_setup_console = xen_arch_setup_console,
		.arch_setup_nomca = xen_arch_setup_nomca,

		.post_smp_prepare_boot_cpu = xen_post_smp_prepare_boot_cpu,
		};

		/***************************************************************************
		* pv_ops initialization
		*/
		@@ -62,4 +171,5 @@ xen_setup_pv_ops(void)
		{
		xen_info_init();
		pv_info = xen_info;
		pv_init_ops = xen_init_ops;
		}