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Commit e4ff5b8f authored by Isaku Yamahata's avatar Isaku Yamahata Committed by Tony Luck
Browse files

ia64/pv_ops: gate page paravirtualization. 



paravirtualize gate page by allowing each pv_ops instances
to define its own gate page.

Signed-off-by: default avatarIsaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent 1aec1c55

arch/ia64/include/asm/native/patchlist.h

0 → 100644
+38 −0
Original line number Diff line number Diff line 
/******************************************************************************

 * arch/ia64/include/asm/native/inst.h

 *

 * 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

 *

 */



#define __paravirt_start_gate_fsyscall_patchlist		\

	__ia64_native_start_gate_fsyscall_patchlist

#define __paravirt_end_gate_fsyscall_patchlist			\

	__ia64_native_end_gate_fsyscall_patchlist

#define __paravirt_start_gate_brl_fsys_bubble_down_patchlist	\

	__ia64_native_start_gate_brl_fsys_bubble_down_patchlist

#define __paravirt_end_gate_brl_fsys_bubble_down_patchlist	\

	__ia64_native_end_gate_brl_fsys_bubble_down_patchlist

#define __paravirt_start_gate_vtop_patchlist			\

	__ia64_native_start_gate_vtop_patchlist

#define __paravirt_end_gate_vtop_patchlist			\

	__ia64_native_end_gate_vtop_patchlist

#define __paravirt_start_gate_mckinley_e9_patchlist		\

	__ia64_native_start_gate_mckinley_e9_patchlist

#define __paravirt_end_gate_mckinley_e9_patchlist		\

	__ia64_native_end_gate_mckinley_e9_patchlist

arch/ia64/include/asm/paravirt.h

+35 −0
Original line number Diff line number Diff line
@@ -35,6 +35,41 @@ extern struct pv_fsys_data pv_fsys_data; 


unsigned long *paravirt_get_fsyscall_table(void);

char *paravirt_get_fsys_bubble_down(void);



/******************************************************************************

 * patchlist addresses for gate page

 */

enum pv_gate_patchlist {

	PV_GATE_START_FSYSCALL,

	PV_GATE_END_FSYSCALL,



	PV_GATE_START_BRL_FSYS_BUBBLE_DOWN,

	PV_GATE_END_BRL_FSYS_BUBBLE_DOWN,



	PV_GATE_START_VTOP,

	PV_GATE_END_VTOP,



	PV_GATE_START_MCKINLEY_E9,

	PV_GATE_END_MCKINLEY_E9,

};



struct pv_patchdata {

	unsigned long start_fsyscall_patchlist;

	unsigned long end_fsyscall_patchlist;

	unsigned long start_brl_fsys_bubble_down_patchlist;

	unsigned long end_brl_fsys_bubble_down_patchlist;

	unsigned long start_vtop_patchlist;

	unsigned long end_vtop_patchlist;

	unsigned long start_mckinley_e9_patchlist;

	unsigned long end_mckinley_e9_patchlist;



	void *gate_section;

};



extern struct pv_patchdata pv_patchdata;



unsigned long paravirt_get_gate_patchlist(enum pv_gate_patchlist type);

void *paravirt_get_gate_section(void);

#endif



#ifdef CONFIG_PARAVIRT_GUEST

arch/ia64/kernel/Makefile

+5 −27
Original line number Diff line number Diff line
@@ -5,7 +5,7 @@ 
extra-y	:= head.o init_task.o vmlinux.lds



obj-y := acpi.o entry.o efi.o efi_stub.o gate-data.o fsys.o ia64_ksyms.o irq.o irq_ia64.o	\

	 irq_lsapic.o ivt.o machvec.o pal.o patch.o process.o perfmon.o ptrace.o sal.o		\

	 irq_lsapic.o ivt.o machvec.o pal.o paravirt_patchlist.o patch.o process.o perfmon.o ptrace.o sal.o		\

	 salinfo.o setup.o signal.o sys_ia64.o time.o traps.o unaligned.o \

	 unwind.o mca.o mca_asm.o topology.o
@@ -47,35 +47,13 @@ ifeq ($(CONFIG_DMAR), y) 
obj-$(CONFIG_SWIOTLB)		+= pci-swiotlb.o

endif



# The gate DSO image is built using a special linker script.

targets += gate.so gate-syms.o



extra-y += gate.so gate-syms.o gate.lds gate.o



# fp_emulate() expects f2-f5,f16-f31 to contain the user-level state.

CFLAGS_traps.o  += -mfixed-range=f2-f5,f16-f31



CPPFLAGS_gate.lds := -P -C -U$(ARCH)



quiet_cmd_gate = GATE $@

      cmd_gate = $(CC) -nostdlib $(GATECFLAGS_$(@F)) -Wl,-T,$(filter-out FORCE,$^) -o $@



GATECFLAGS_gate.so = -shared -s -Wl,-soname=linux-gate.so.1 \

		     $(call ld-option, -Wl$(comma)--hash-style=sysv)

$(obj)/gate.so: $(obj)/gate.lds $(obj)/gate.o FORCE

	$(call if_changed,gate)



$(obj)/built-in.o: $(obj)/gate-syms.o

$(obj)/built-in.o: ld_flags += -R $(obj)/gate-syms.o



GATECFLAGS_gate-syms.o = -r

$(obj)/gate-syms.o: $(obj)/gate.lds $(obj)/gate.o FORCE

	$(call if_changed,gate)



# gate-data.o contains the gate DSO image as data in section .data.gate.

# We must build gate.so before we can assemble it.

# Note: kbuild does not track this dependency due to usage of .incbin

$(obj)/gate-data.o: $(obj)/gate.so

# The gate DSO image is built using a special linker script.

include $(srctree)/arch/ia64/kernel/Makefile.gate

# tell compiled for native

CPPFLAGS_gate.lds += -D__IA64_GATE_PARAVIRTUALIZED_NATIVE



# Calculate NR_IRQ = max(IA64_NATIVE_NR_IRQS, XEN_NR_IRQS, ...) based on config

define sed-y

arch/ia64/kernel/Makefile.gate

0 → 100644
+27 −0
Original line number Diff line number Diff line 
# The gate DSO image is built using a special linker script.



targets += gate.so gate-syms.o



extra-y += gate.so gate-syms.o gate.lds gate.o



CPPFLAGS_gate.lds := -P -C -U$(ARCH)



quiet_cmd_gate = GATE $@

      cmd_gate = $(CC) -nostdlib $(GATECFLAGS_$(@F)) -Wl,-T,$(filter-out FORCE,$^) -o $@



GATECFLAGS_gate.so = -shared -s -Wl,-soname=linux-gate.so.1 \

		     $(call ld-option, -Wl$(comma)--hash-style=sysv)

$(obj)/gate.so: $(obj)/gate.lds $(obj)/gate.o FORCE

	$(call if_changed,gate)



$(obj)/built-in.o: $(obj)/gate-syms.o

$(obj)/built-in.o: ld_flags += -R $(obj)/gate-syms.o



GATECFLAGS_gate-syms.o = -r

$(obj)/gate-syms.o: $(obj)/gate.lds $(obj)/gate.o FORCE

	$(call if_changed,gate)



# gate-data.o contains the gate DSO image as data in section .data.gate.

# We must build gate.so before we can assemble it.

# Note: kbuild does not track this dependency due to usage of .incbin

$(obj)/gate-data.o: $(obj)/gate.so

arch/ia64/kernel/gate.lds.S

+9 −8
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ 




#include <asm/system.h>

#include "paravirt_patchlist.h"



SECTIONS

{
@@ -33,21 +34,21 @@ SECTIONS 
	. = GATE_ADDR + 0x600;



	.data.patch		: {

		__start_gate_mckinley_e9_patchlist = .;

		__paravirt_start_gate_mckinley_e9_patchlist = .;

		*(.data.patch.mckinley_e9)

		__end_gate_mckinley_e9_patchlist = .;

		__paravirt_end_gate_mckinley_e9_patchlist = .;



		__start_gate_vtop_patchlist = .;

		__paravirt_start_gate_vtop_patchlist = .;

		*(.data.patch.vtop)

		__end_gate_vtop_patchlist = .;

		__paravirt_end_gate_vtop_patchlist = .;



		__start_gate_fsyscall_patchlist = .;

		__paravirt_start_gate_fsyscall_patchlist = .;

		*(.data.patch.fsyscall_table)

		__end_gate_fsyscall_patchlist = .;

		__paravirt_end_gate_fsyscall_patchlist = .;



		__start_gate_brl_fsys_bubble_down_patchlist = .;

		__paravirt_start_gate_brl_fsys_bubble_down_patchlist = .;

		*(.data.patch.brl_fsys_bubble_down)

		__end_gate_brl_fsys_bubble_down_patchlist = .;

		__paravirt_end_gate_brl_fsys_bubble_down_patchlist = .;

	}						:readable



	.IA_64.unwind_info	: { *(.IA_64.unwind_info*) }