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Content-Language: en-US To: Jonathan Cameron , Thomas Gleixner , Peter Zijlstra , linux-pm@vger.kernel.org, loongarch@lists.linux.dev, linux-acpi@vger.kernel.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, x86@kernel.org, Russell King , "Rafael J . Wysocki" , Miguel Luis , James Morse , Salil Mehta , Jean-Philippe Brucker , Catalin Marinas , Will Deacon , Marc Zyngier , Hanjun Guo Cc: Ingo Molnar , Borislav Petkov , Dave Hansen , linuxarm@huawei.com, justin.he@arm.com, jianyong.wu@arm.com References: <20240430142434.10471-1-Jonathan.Cameron@huawei.com> <20240430142434.10471-18-Jonathan.Cameron@huawei.com> From: Gavin Shan In-Reply-To: <20240430142434.10471-18-Jonathan.Cameron@huawei.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 5/1/24 00:24, Jonathan Cameron wrote: > In order to move arch_register_cpu() to be called via the same path > for initially present CPUs described by ACPI and hotplugged CPUs > ACPI_HOTPLUG_CPU needs to be enabled. > > The protection against invalid IDs in acpi_map_cpu() is needed as > at least one production BIOS is in the wild which reports entries > in DSDT (with no _STA method, so assumed enabled and present) > that don't match MADT. > > Tested-by: Miguel Luis > Signed-off-by: Jonathan Cameron > > --- > V9: No change. > > --- > arch/arm64/Kconfig | 1 + > arch/arm64/kernel/acpi.c | 22 ++++++++++++++++++++++ > 2 files changed, 23 insertions(+) > Reviewed-by: Gavin Shan