ia64/pv_ops/xen: elf note based xen startup. (080104cd) · Commits · 戴 / test

arch/ia64/kernel/asm-offsets.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -17,6 +17,7 @@
		#include <asm/mca.h>

		#include <asm/xen/interface.h>
		#include <asm/xen/hypervisor.h>

		#include "../kernel/sigframe.h"
		#include "../kernel/fsyscall_gtod_data.h"
		@@ -292,6 +293,9 @@ void foo(void)
		#ifdef CONFIG_XEN
		BLANK();

		DEFINE(XEN_NATIVE_ASM, XEN_NATIVE);
		DEFINE(XEN_PV_DOMAIN_ASM, XEN_PV_DOMAIN);

		#define DEFINE_MAPPED_REG_OFS(sym, field) \
		DEFINE(sym, (XMAPPEDREGS_OFS + offsetof(struct mapped_regs, field)))

arch/ia64/xen/Makefile

+2 −1

Original line number	Diff line number	Diff line
		@@ -2,4 +2,5 @@
		# Makefile for Xen components
		#

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

arch/ia64/xen/xen_pv_ops.c

0 → 100644

+65 −0

Original line number	Diff line number	Diff line
		/******************************************************************************
		* arch/ia64/xen/xen_pv_ops.c
		*
		* Copyright (c) 2008 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/console.h>
		#include <linux/irq.h>
		#include <linux/kernel.h>
		#include <linux/pm.h>

		#include <asm/xen/hypervisor.h>
		#include <asm/xen/xencomm.h>
		#include <asm/xen/privop.h>

		/***************************************************************************
		* general info
		*/
		static struct pv_info xen_info __initdata = {
		.kernel_rpl = 2, /* or 1: determin at runtime */
		.paravirt_enabled = 1,
		.name = "Xen/ia64",
		};

		#define IA64_RSC_PL_SHIFT 2
		#define IA64_RSC_PL_BIT_SIZE 2
		#define IA64_RSC_PL_MASK \
		(((1UL << IA64_RSC_PL_BIT_SIZE) - 1) << IA64_RSC_PL_SHIFT)

		static void __init
		xen_info_init(void)
		{
		/* Xenified Linux/ia64 may run on pl = 1 or 2.
		* determin at run time. */
		unsigned long rsc = ia64_getreg(_IA64_REG_AR_RSC);
		unsigned int rpl = (rsc & IA64_RSC_PL_MASK) >> IA64_RSC_PL_SHIFT;
		xen_info.kernel_rpl = rpl;
		}

		/***************************************************************************
		* pv_ops initialization
		*/

		void __init
		xen_setup_pv_ops(void)
		{
		xen_info_init();
		pv_info = xen_info;
		}

arch/ia64/xen/xensetup.S

0 → 100644

+83 −0

Original line number	Diff line number	Diff line
		/*
		* Support routines for Xen
		*
		* Copyright (C) 2005 Dan Magenheimer <dan.magenheimer@hp.com>
		*/

		#include <asm/processor.h>
		#include <asm/asmmacro.h>
		#include <asm/pgtable.h>
		#include <asm/system.h>
		#include <asm/paravirt.h>
		#include <asm/xen/privop.h>
		#include <linux/elfnote.h>
		#include <linux/init.h>
		#include <xen/interface/elfnote.h>

		.section .data.read_mostly
		.align 8
		.global xen_domain_type
		xen_domain_type:
		data4 XEN_NATIVE_ASM
		.previous

		__INIT
		ENTRY(startup_xen)
		// Calculate load offset.
		// The constant, LOAD_OFFSET, can't be used because the boot
		// loader doesn't always load to the LMA specified by the vmlinux.lds.
		mov r9=ip // must be the first instruction to make sure
		// that r9 = the physical address of startup_xen.
		// Usually r9 = startup_xen - LOAD_OFFSET
		movl r8=startup_xen
		;;
		sub r9=r9,r8 // Usually r9 = -LOAD_OFFSET.

		mov r10=PARAVIRT_HYPERVISOR_TYPE_XEN
		movl r11=_start
		;;
		add r11=r11,r9
		movl r8=hypervisor_type
		;;
		add r8=r8,r9
		mov b0=r11
		;;
		st8 [r8]=r10
		br.cond.sptk.many b0
		;;
		END(startup_xen)

		ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz "linux")
		ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz "2.6")
		ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz "xen-3.0")
		ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, data8.ua startup_xen - LOAD_OFFSET)

		#define isBP p3 // are we the Bootstrap Processor?

		.text

		GLOBAL_ENTRY(xen_setup_hook)
		mov r8=XEN_PV_DOMAIN_ASM
		(isBP) movl r9=xen_domain_type;;
		(isBP) st4 [r9]=r8
		movl r10=xen_ivt;;

		mov cr.iva=r10

		/* Set xsi base. */
		#define FW_HYPERCALL_SET_SHARED_INFO_VA 0x600
		(isBP) mov r2=FW_HYPERCALL_SET_SHARED_INFO_VA
		(isBP) movl r28=XSI_BASE;;
		(isBP) break 0x1000;;

		/* setup pv_ops */
		(isBP) mov r4=rp
		;;
		(isBP) br.call.sptk.many rp=xen_setup_pv_ops
		;;
		(isBP) mov rp=r4
		;;

		br.ret.sptk.many rp
		;;
		END(xen_setup_hook)

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