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/openbmc/linux/arch/arm64/mm/ |
H A D | context.c | 565630d5 Fri Jun 12 05:24:41 CDT 2015 Catalin Marinas <catalin.marinas@arm.com> arm64: Do not attempt to use init_mm in reset_context()
After secondary CPU boot or hotplug, the active_mm of the idle thread is &init_mm. The init_mm.pgd (swapper_pg_dir) is only meant for TTBR1_EL1 and must not be set in TTBR0_EL1. Since when active_mm == &init_mm the TTBR0_EL1 is already set to the reserved value, there is no need to perform any context reset.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: <stable@vger.kernel.org> 565630d5 Fri Jun 12 05:24:41 CDT 2015 Catalin Marinas <catalin.marinas@arm.com> arm64: Do not attempt to use init_mm in reset_context() After secondary CPU boot or hotplug, the active_mm of the idle thread is &init_mm. The init_mm.pgd (swapper_pg_dir) is only meant for TTBR1_EL1 and must not be set in TTBR0_EL1. Since when active_mm == &init_mm the TTBR0_EL1 is already set to the reserved value, there is no need to perform any context reset. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: <stable@vger.kernel.org>
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