]> git.karo-electronics.de Git - linux-beck.git/commit
arm64: Fix behavior of maxcpus=N
authorSuzuki K Poulose <suzuki.poulose@arm.com>
Fri, 22 Apr 2016 11:25:35 +0000 (12:25 +0100)
committerWill Deacon <will.deacon@arm.com>
Mon, 25 Apr 2016 14:14:09 +0000 (15:14 +0100)
commit44dbcc93ab67145bf8ebe3e91123303443c4a3bf
tree0a990758ac2815ab96efc04d7e0c00384f95fbdd
parent6a6efbb45b7d95c84840010095367eb06a64f342
arm64: Fix behavior of maxcpus=N

maxcpu=n sets the number of CPUs activated at boot time to a max of n,
but allowing the remaining CPUs to be brought up later if the user
decides to do so. However, on arm64 due to various reasons, we disallowed
hotplugging CPUs beyond n, by marking them not present. Now that
we have checks in place to make sure the hotplugged CPUs have compatible
features with system and requires no new errata, relax the restriction.

Cc: Will Deacon <will.deacon@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: James Morse <james.morse@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
arch/arm64/kernel/smp.c