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Revision 74ca317c26a3f8543203b61d262c0ab2e30c384e authored by Vivek Goyal on 29 August 2014, 22:18:46 UTC, committed by Linus Torvalds on 29 August 2014, 23:28:16 UTC 
kexec: create a new config option CONFIG_KEXEC_FILE for new syscall
 
Currently new system call kexec_file_load() and all the associated code
compiles if CONFIG_KEXEC=y.  But new syscall also compiles purgatory
code which currently uses gcc option -mcmodel=large.  This option seems
to be available only gcc 4.4 onwards.

Hiding new functionality behind a new config option will not break
existing users of old gcc.  Those who wish to enable new functionality
will require new gcc.  Having said that, I am trying to figure out how
can I move away from using -mcmodel=large but that can take a while.

I think there are other advantages of introducing this new config
option.  As this option will be enabled only on x86_64, other arches
don't have to compile generic kexec code which will never be used.  This
new code selects CRYPTO=y and CRYPTO_SHA256=y.  And all other arches had
to do this for CONFIG_KEXEC.  Now with introduction of new config
option, we can remove crypto dependency from other arches.

Now CONFIG_KEXEC_FILE is available only on x86_64.  So whereever I had
CONFIG_X86_64 defined, I got rid of that.

For CONFIG_KEXEC_FILE, instead of doing select CRYPTO=y, I changed it to
"depends on CRYPTO=y".  This should be safer as "select" is not
recursive.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Tested-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent b38af47
Raw File
fixup-loongson3.c 
/*
 * fixup-loongson3.c
 *
 * Copyright (C) 2012 Lemote, Inc.
 * Author: Xiang Yu, xiangy@lemote.com
 *         Chen Huacai, chenhc@lemote.com
 *
 * 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  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
 * WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 * NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
 * USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#include <linux/pci.h>
#include <boot_param.h>

static void print_fixup_info(const struct pci_dev *pdev)
{
	dev_info(&pdev->dev, "Device %x:%x, irq %d\n",
			pdev->vendor, pdev->device, pdev->irq);
}

int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
	print_fixup_info(dev);
	return dev->irq;
}

static void pci_fixup_radeon(struct pci_dev *pdev)
{
	if (pdev->resource[PCI_ROM_RESOURCE].start)
		return;

	if (!loongson_sysconf.vgabios_addr)
		return;

	pdev->resource[PCI_ROM_RESOURCE].start =
		loongson_sysconf.vgabios_addr;
	pdev->resource[PCI_ROM_RESOURCE].end   =
		loongson_sysconf.vgabios_addr + 256*1024 - 1;
	pdev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_COPY;

	dev_info(&pdev->dev, "BAR %d: assigned %pR for Radeon ROM\n",
			PCI_ROM_RESOURCE, &pdev->resource[PCI_ROM_RESOURCE]);
}

DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_ATI, PCI_ANY_ID,
				PCI_CLASS_DISPLAY_VGA, 8, pci_fixup_radeon);

/* Do platform specific device initialization at pci_enable_device() time */
int pcibios_plat_dev_init(struct pci_dev *dev)
{
	return 0;
}
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