On 2015年01月16日 22:33, Lorenzo Pieralisi wrote:
On Wed, Jan 14, 2015 at 03:04:55PM +0000, 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
Nit: "that information"
or
"...OS has no way to retrieve the configuration data that is necessary
to init SMP boot protocol and the GIC properly, so.."
smp and GIC, so disable ACPI if we get an FADT table with version
less that 5.1.
Patch should be reordered in the series and must be sequenced before
patch 5 for bisectability (that patch implements DT unflattening if ACPI
is disabled), or squashed with previous patches.
OK, I will reorder this patch set and update the change log above.
Thanks
Hanjun
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