diff options
author | Thomas Gleixner <tglx@linutronix.de> | 2016-10-29 13:42:42 +0200 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2016-10-29 14:00:46 +0200 |
commit | 1e90a13d0c3dc94512af1ccb2b6563e8297838fa (patch) | |
tree | ba8b86dbed5f1e33d6039cfd34b633178b562207 /include/dt-bindings | |
parent | c067affcd316a36a28beaf8ea8c39db22a88c778 (diff) |
x86/smpboot: Init apic mapping before usage
The recent changes, which forced the registration of the boot cpu on UP
systems, which do not have ACPI tables, have been fixed for systems w/o
local APIC, but left a wreckage for systems which have neither ACPI nor
mptables, but the CPU has an APIC, e.g. virtualbox.
The boot process crashes in prefill_possible_map() as it wants to register
the boot cpu, which needs to access the local apic, but the local APIC is
not yet mapped.
There is no reason why init_apic_mapping() can't be invoked before
prefill_possible_map(). So instead of playing another silly early mapping
game, as the ACPI/mptables code does, we just move init_apic_mapping()
before the call to prefill_possible_map().
In hindsight, I should have noticed that combination earlier.
Sorry for the churn (also in stable)!
Fixes: ff8560512b8d ("x86/boot/smp: Don't try to poke disabled/non-existent APIC")
Reported-and-debugged-by: Michal Necasek <michal.necasek@oracle.com>
Reported-and-tested-by: Wolfgang Bauer <wbauer@tmo.at>
Cc: prarit@redhat.com
Cc: ville.syrjala@linux.intel.com
Cc: michael.thayer@oracle.com
Cc: knut.osmundsen@oracle.com
Cc: frank.mehnert@oracle.com
Cc: Borislav Petkov <bp@alien8.de>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1610282114380.5053@nanos
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/dt-bindings')
0 files changed, 0 insertions, 0 deletions