powerpc/le: Enable RTAS events support

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The current kernel code assumes big endian and parses RTAS events all
wrong. The most visible effect is that we cannot honor EPOW events,
meaning, for example, we cannot shut down a guest properly from the
hypervisor.

This new patch is largely inspired by Nathan's work: we get rid of all
the bit fields in the RTAS event structures (even the unused ones, for
consistency). We also introduce endian safe accessors for the fields used
by the kernel (trivial rtas_error_type() accessor added for consistency).

Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

...

This commit is contained in:

Greg Kurz 2014-04-04 09:35:13 +02:00 • committed by Benjamin Herrenschmidt

parent c59c015b6a

commit a08a53ea4c

5 changed files with 128 additions and 61 deletions

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127

arch/powerpc/include/asm/rtas.h

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15

arch/powerpc/kernel/rtas.c

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24

arch/powerpc/kernel/rtasd.c

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6

arch/powerpc/platforms/pseries/io_event_irq.c

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17

arch/powerpc/platforms/pseries/ras.c

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