platform/x86: ISST: Avoid some SkyLake server models

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Some SkyLake server variants don't support any SST functionality. No use
of providing any SST related interfaces on them.

All supported SkyLake servers provide mailbox interface via MSR. So check
for the presence of MSR 0xB0 and 0xB1. If not present don't load common
module.

Move defines for MSR_OS_MAILBOX_INTERFACE and MSR_OS_MAILBOX_DATA to
common header file to avoid duplicating them.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://lore.kernel.org/r/20240531083554.1313110-3-srinivas.pandruvada@linux.intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

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Srinivas Pandruvada 2024-05-31 01:35:47 -07:00 • committed by Ilpo Järvinen

parent 1630dc626c

commit 3ea025fb4b

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GPG key ID: 59AC4F6153E5CE31

3 changed files with 14 additions and 4 deletions

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13

drivers/platform/x86/intel/speed_select_if/isst_if_common.c

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3

drivers/platform/x86/intel/speed_select_if/isst_if_common.h

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2

drivers/platform/x86/intel/speed_select_if/isst_if_mbox_msr.c

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