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| author | Thomas Gleixner <tglx@linutronix.de> | 2019-07-22 20:47:08 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-05 12:27:45 +0200 |
| commit | 3b6cccf414ac23606aaa68e43392be52493eb279 (patch) | |
| tree | d5e772d88c563a595dc1977a2a2e7c618dbb6383 /include/uapi | |
| parent | 03b8c7430457993761da4b1f5e54a1a56cf7a4b0 (diff) | |
x86/apic: Soft disable APIC before initializing it
[ Upstream commit 2640da4cccf5cc613bf26f0998b9e340f4b5f69c ]
If the APIC was already enabled on entry of setup_local_APIC() then
disabling it soft via the SPIV register makes a lot of sense.
That masks all LVT entries and brings it into a well defined state.
Otherwise previously enabled LVTs which are not touched in the setup
function stay unmasked and might surprise the just booting kernel.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20190722105219.068290579@linutronix.de
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/uapi')
0 files changed, 0 insertions, 0 deletions