| Date | Thu, 15 Jan 2015 12:47:03 -0600 | From | Mark Langsdorf <> | Subject | Re: [PATCH v7 07/17] ARM64 / ACPI: Disable ACPI if FADT revision is less than 5.1 |
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On 01/14/2015 09:04 AM, Hanjun Guo wrote: > FADT Major.Minor version was introduced in ACPI 5.1, it is the same > as ACPI version. > > In ACPI 5.1, some major gaps are fixed for ARM, such as updates in > MADT table for GIC and SMP init, without those updates, we can not > get the MPIDR for SMP init, and GICv2/3 related init information, so > we can't boot arm64 ACPI properly with table versions predating 5.1. > > If firmware provides ACPI tables with ACPI version less than 5.1, > OS will be messed up with those information and have no way to init > smp and GIC, so disable ACPI if we get an FADT table with version > less that 5.1. > > Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> > Tested-by: Yijing Wang <wangyijing@huawei.com> > Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> > --- Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
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