kernel_optimize_test/arch/x86_64
Eric W. Biederman 1008fddcae [PATCH] x86_64: Memorize location of i8259 for reboots.
Currently we attempt to restore virtual wire mode on reboot, which only
works if we can figure out where the i8259 is connected.  This is very
useful when we are kexec another kernel and likely helpful to an peculiar
BIOS that make assumptions about how the system is setup.

Since the acpi MADT table does not provide the location where the i8259 is
connected we have to look at the hardware to figure it out.

Most systems have the i8259 connected the local apic of the cpu so won't be
affected but people running Opteron and some serverworks chipsets should be
able to use kexec now.

In addition this patch removes the hard coded assumption that the io_apic
that delivers isa interrups is always known to the kernel as io_apic 0.
There does not appear to be anything to guarantee that assumption is true.

And From: Vivek Goyal <vgoyal@in.ibm.com>

  A minor fix to the patch which remembers the location of where i8259 is
  connected.  Now counter i has been replaced by apic.  counter i is having
  some junk value which was leading to non-detection of i8259 connected to
  IOAPIC.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-11 19:05:00 -08:00
..
boot Merge ssh://master.kernel.org/pub/scm/linux/kernel/git/sam/kbuild 2006-01-10 08:21:33 -08:00
crypto [CRYPTO] Allow AES C/ASM implementations to coexist 2006-01-09 14:15:39 -08:00
ia32 [PATCH] x86_64: allow setting RF in EFLAGS 2006-01-11 19:05:00 -08:00
kernel [PATCH] x86_64: Memorize location of i8259 for reboots. 2006-01-11 19:05:00 -08:00
lib [PATCH] x86_64: Clean up copy_*_user 2006-01-11 19:04:55 -08:00
mm [PATCH] x86_64: Node local pda take 2 -- cpu_pda preparation 2006-01-11 19:04:59 -08:00
oprofile [PATCH] Move Kprobes and Oprofile to "Instrumentation Support" menu 2005-11-07 07:53:35 -08:00
pci [PATCH] x86_64: Remove bogus file in arch/x86_64/pci 2006-01-11 19:04:51 -08:00
defconfig [PATCH] x86_64: Update defconfig 2006-01-11 19:01:09 -08:00
Kconfig [PATCH] x86_64: Use function pointers to call DMA mapping functions 2006-01-11 19:04:55 -08:00
Kconfig.debug [PATCH] x86/x86_64: mark rodata section read-only: x86-64 support 2006-01-06 08:33:36 -08:00
Makefile [PATCH] x86_64: Allow compilation on a 32bit biarch toolchain 2006-01-11 19:04:52 -08:00