| commit | 7c6d9f9785d156d0438401ef270322da3d5247db | |
| author | Suresh Siddha <suresh.b.siddha@intel.com> | |
| Tue, 17 Mar 2009 00:04:59 +0000 (16 17:04 -0700) | ||
| committer | H. Peter Anvin <hpa@linux.intel.com> | |
| Tue, 17 Mar 2009 22:42:28 +0000 (17 15:42 -0700) | ||
| tree | 43836c9bbce7ad270b3e5e34cf469e0210c5d2a9 | treesnapshot (tar.gz zip) |
| parent | 2e93456f5c069cf889c0c3acd1246ee88c49ae5c | commitdiff |
x86, x2apic: use virtual wire A mode in disable_IO_APIC() with interrupt-remapping
Impact: make kexec work with x2apic
disable_IO_APIC() gets called during crashdump aswell, which configures the
IO-APIC/LAPIC so that legacy interrupts can be delivered for the kexec'd kernel.
In the presence of interrupt-remapping, we need to change the
interrupt-remapping configuration aswell as modifying IO-APIC for virtual wire
B mode.
To keep things simple during the crash, use virtual wire A mode
(for which we don't need to touch io-apic and interrupt-remapping tables).
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Impact: make kexec work with x2apic
disable_IO_APIC() gets called during crashdump aswell, which configures the
IO-APIC/LAPIC so that legacy interrupts can be delivered for the kexec'd kernel.
In the presence of interrupt-remapping, we need to change the
interrupt-remapping configuration aswell as modifying IO-APIC for virtual wire
B mode.
To keep things simple during the crash, use virtual wire A mode
(for which we don't need to touch io-apic and interrupt-remapping tables).
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| arch/x86/kernel/apic/io_apic.c | diffblobblamehistory |