2014-11-12 19:59:38 -05:00
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2015-01-27 16:03:57 -05:00
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2014-11-12 19:59:38 -05:00
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2015-01-27 16:03:57 -05:00
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2014-11-12 19:59:38 -05:00
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2016-08-15 17:14:05 -07:00
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2014-11-12 19:59:38 -05:00
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2016-02-17 13:21:01 -07:00
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2016-11-14 11:19:02 -08:00
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2014-11-12 19:59:38 -05:00
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2016-08-15 17:14:05 -07:00
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2014-11-12 19:59:38 -05:00
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2016-02-17 13:21:01 -07:00
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2016-08-15 17:14:05 -07:00
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2016-02-17 13:21:01 -07:00
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2014-11-12 19:59:38 -05:00
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2017-07-21 15:09:29 -07:00
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2014-11-12 19:59:38 -05:00
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2015-12-10 17:28:37 +00:00
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2014-11-12 19:59:38 -05:00
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2016-08-15 17:14:05 -07:00
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2017-06-05 16:39:08 +08:00
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2016-08-15 17:14:05 -07:00
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2014-11-12 19:59:38 -05:00
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2015-09-16 19:34:24 +05:30
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2015-01-27 16:03:57 -05:00
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2014-11-12 19:59:38 -05:00
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2017-09-28 11:18:52 +01:00
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2014-11-12 19:59:38 -05:00
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2016-11-14 11:19:02 -08:00
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2016-08-15 17:14:05 -07:00
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2016-11-14 11:19:02 -08:00
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2016-08-15 17:14:05 -07:00
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2014-11-12 19:59:38 -05:00
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2016-08-15 17:14:05 -07:00
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2014-11-12 19:59:38 -05:00
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2016-08-15 17:14:05 -07:00
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2016-11-14 11:19:02 -08:00
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2014-11-12 19:59:38 -05:00
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2017-09-28 11:18:52 +01:00
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2014-11-12 19:59:38 -05:00
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2015-01-27 16:03:57 -05:00
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2014-11-12 19:59:38 -05:00
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2015-01-27 16:03:57 -05:00
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2014-11-12 19:59:38 -05:00
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2016-02-17 13:21:01 -07:00
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2014-11-12 19:59:38 -05:00
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2016-02-17 13:21:01 -07:00
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2014-11-12 19:59:38 -05:00
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2016-02-17 13:21:01 -07:00
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2014-11-12 19:59:38 -05:00
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2015-01-27 16:03:57 -05:00
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2016-02-17 13:21:01 -07:00
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2014-11-12 19:59:38 -05:00
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2015-05-04 10:36:35 -07:00
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2014-11-12 19:59:38 -05:00
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mailbox: PCC: erroneous error message when parsing ACPI PCCT
There have been multiple reports of the following error message:
[ 0.068293] Error parsing PCC subspaces from PCCT
This error message is not correct. In multiple cases examined, the PCCT
(Platform Communications Channel Table) concerned is actually properly
constructed; the problem is that acpi_pcc_probe() which reads the PCCT
is making the assumption that the only valid PCCT is one that contains
subtables of one of two types: ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE or
ACPI_PCCT_TYPE_HW_REDUCED_TYPE2. The number of subtables of these
types are counted and as long as there is at least one of the desired
types, the acpi_pcc_probe() succeeds. When no subtables of these types
are found, regardless of whether or not any other subtable types are
present, the error mentioned above is reported.
In the cases reported to me personally, the PCCT contains exactly one
subtable of type ACPI_PCCT_TYPE_GENERIC_SUBSPACE. The function
acpi_pcc_probe() does not count it as a valid subtable, so believes
there to be no valid subtables, and hence outputs the error message.
An example of the PCCT being reported as erroneous yet perfectly fine
is the following:
Signature : "PCCT"
Table Length : 0000006E
Revision : 05
Checksum : A9
Oem ID : "XXXXXX"
Oem Table ID : "XXXXX "
Oem Revision : 00002280
Asl Compiler ID : "XXXX"
Asl Compiler Revision : 00000002
Flags (decoded below) : 00000001
Platform : 1
Reserved : 0000000000000000
Subtable Type : 00 [Generic Communications Subspace]
Length : 3E
Reserved : 000000000000
Base Address : 00000000DCE43018
Address Length : 0000000000001000
Doorbell Register : [Generic Address Structure]
Space ID : 01 [SystemIO]
Bit Width : 08
Bit Offset : 00
Encoded Access Width : 01 [Byte Access:8]
Address : 0000000000001842
Preserve Mask : 00000000000000FD
Write Mask : 0000000000000002
Command Latency : 00001388
Maximum Access Rate : 00000000
Minimum Turnaround Time : 0000
To fix this, we count up all of the possible subtable types for the
PCCT, and only report an error when there are none (which could mean
either no subtables, or no valid subtables), or there are too many.
We also change the logic so that if there is a valid subtable, we
do try to initialize it per the PCCT subtable contents. This is a
change in functionality; previously, the probe would have returned
right after the error message and would not have tried to use any
other subtable definition.
Tested on my personal laptop which showed the error previously; the
error message no longer appears and the laptop appears to operate
normally.
Signed-off-by: Al Stone <ahs3@redhat.com>
Reviewed-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-05-16 16:01:41 -06:00
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2014-11-12 19:59:38 -05:00
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mailbox: PCC: erroneous error message when parsing ACPI PCCT
There have been multiple reports of the following error message:
[ 0.068293] Error parsing PCC subspaces from PCCT
This error message is not correct. In multiple cases examined, the PCCT
(Platform Communications Channel Table) concerned is actually properly
constructed; the problem is that acpi_pcc_probe() which reads the PCCT
is making the assumption that the only valid PCCT is one that contains
subtables of one of two types: ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE or
ACPI_PCCT_TYPE_HW_REDUCED_TYPE2. The number of subtables of these
types are counted and as long as there is at least one of the desired
types, the acpi_pcc_probe() succeeds. When no subtables of these types
are found, regardless of whether or not any other subtable types are
present, the error mentioned above is reported.
In the cases reported to me personally, the PCCT contains exactly one
subtable of type ACPI_PCCT_TYPE_GENERIC_SUBSPACE. The function
acpi_pcc_probe() does not count it as a valid subtable, so believes
there to be no valid subtables, and hence outputs the error message.
An example of the PCCT being reported as erroneous yet perfectly fine
is the following:
Signature : "PCCT"
Table Length : 0000006E
Revision : 05
Checksum : A9
Oem ID : "XXXXXX"
Oem Table ID : "XXXXX "
Oem Revision : 00002280
Asl Compiler ID : "XXXX"
Asl Compiler Revision : 00000002
Flags (decoded below) : 00000001
Platform : 1
Reserved : 0000000000000000
Subtable Type : 00 [Generic Communications Subspace]
Length : 3E
Reserved : 000000000000
Base Address : 00000000DCE43018
Address Length : 0000000000001000
Doorbell Register : [Generic Address Structure]
Space ID : 01 [SystemIO]
Bit Width : 08
Bit Offset : 00
Encoded Access Width : 01 [Byte Access:8]
Address : 0000000000001842
Preserve Mask : 00000000000000FD
Write Mask : 0000000000000002
Command Latency : 00001388
Maximum Access Rate : 00000000
Minimum Turnaround Time : 0000
To fix this, we count up all of the possible subtable types for the
PCCT, and only report an error when there are none (which could mean
either no subtables, or no valid subtables), or there are too many.
We also change the logic so that if there is a valid subtable, we
do try to initialize it per the PCCT subtable contents. This is a
change in functionality; previously, the probe would have returned
right after the error message and would not have tried to use any
other subtable definition.
Tested on my personal laptop which showed the error previously; the
error message no longer appears and the laptop appears to operate
normally.
Signed-off-by: Al Stone <ahs3@redhat.com>
Reviewed-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-05-16 16:01:41 -06:00
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2014-11-12 19:59:38 -05:00
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mailbox: PCC: erroneous error message when parsing ACPI PCCT
There have been multiple reports of the following error message:
[ 0.068293] Error parsing PCC subspaces from PCCT
This error message is not correct. In multiple cases examined, the PCCT
(Platform Communications Channel Table) concerned is actually properly
constructed; the problem is that acpi_pcc_probe() which reads the PCCT
is making the assumption that the only valid PCCT is one that contains
subtables of one of two types: ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE or
ACPI_PCCT_TYPE_HW_REDUCED_TYPE2. The number of subtables of these
types are counted and as long as there is at least one of the desired
types, the acpi_pcc_probe() succeeds. When no subtables of these types
are found, regardless of whether or not any other subtable types are
present, the error mentioned above is reported.
In the cases reported to me personally, the PCCT contains exactly one
subtable of type ACPI_PCCT_TYPE_GENERIC_SUBSPACE. The function
acpi_pcc_probe() does not count it as a valid subtable, so believes
there to be no valid subtables, and hence outputs the error message.
An example of the PCCT being reported as erroneous yet perfectly fine
is the following:
Signature : "PCCT"
Table Length : 0000006E
Revision : 05
Checksum : A9
Oem ID : "XXXXXX"
Oem Table ID : "XXXXX "
Oem Revision : 00002280
Asl Compiler ID : "XXXX"
Asl Compiler Revision : 00000002
Flags (decoded below) : 00000001
Platform : 1
Reserved : 0000000000000000
Subtable Type : 00 [Generic Communications Subspace]
Length : 3E
Reserved : 000000000000
Base Address : 00000000DCE43018
Address Length : 0000000000001000
Doorbell Register : [Generic Address Structure]
Space ID : 01 [SystemIO]
Bit Width : 08
Bit Offset : 00
Encoded Access Width : 01 [Byte Access:8]
Address : 0000000000001842
Preserve Mask : 00000000000000FD
Write Mask : 0000000000000002
Command Latency : 00001388
Maximum Access Rate : 00000000
Minimum Turnaround Time : 0000
To fix this, we count up all of the possible subtable types for the
PCCT, and only report an error when there are none (which could mean
either no subtables, or no valid subtables), or there are too many.
We also change the logic so that if there is a valid subtable, we
do try to initialize it per the PCCT subtable contents. This is a
change in functionality; previously, the probe would have returned
right after the error message and would not have tried to use any
other subtable definition.
Tested on my personal laptop which showed the error previously; the
error message no longer appears and the laptop appears to operate
normally.
Signed-off-by: Al Stone <ahs3@redhat.com>
Reviewed-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-05-16 16:01:41 -06:00
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2014-11-12 19:59:38 -05:00
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mailbox: PCC: erroneous error message when parsing ACPI PCCT
There have been multiple reports of the following error message:
[ 0.068293] Error parsing PCC subspaces from PCCT
This error message is not correct. In multiple cases examined, the PCCT
(Platform Communications Channel Table) concerned is actually properly
constructed; the problem is that acpi_pcc_probe() which reads the PCCT
is making the assumption that the only valid PCCT is one that contains
subtables of one of two types: ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE or
ACPI_PCCT_TYPE_HW_REDUCED_TYPE2. The number of subtables of these
types are counted and as long as there is at least one of the desired
types, the acpi_pcc_probe() succeeds. When no subtables of these types
are found, regardless of whether or not any other subtable types are
present, the error mentioned above is reported.
In the cases reported to me personally, the PCCT contains exactly one
subtable of type ACPI_PCCT_TYPE_GENERIC_SUBSPACE. The function
acpi_pcc_probe() does not count it as a valid subtable, so believes
there to be no valid subtables, and hence outputs the error message.
An example of the PCCT being reported as erroneous yet perfectly fine
is the following:
Signature : "PCCT"
Table Length : 0000006E
Revision : 05
Checksum : A9
Oem ID : "XXXXXX"
Oem Table ID : "XXXXX "
Oem Revision : 00002280
Asl Compiler ID : "XXXX"
Asl Compiler Revision : 00000002
Flags (decoded below) : 00000001
Platform : 1
Reserved : 0000000000000000
Subtable Type : 00 [Generic Communications Subspace]
Length : 3E
Reserved : 000000000000
Base Address : 00000000DCE43018
Address Length : 0000000000001000
Doorbell Register : [Generic Address Structure]
Space ID : 01 [SystemIO]
Bit Width : 08
Bit Offset : 00
Encoded Access Width : 01 [Byte Access:8]
Address : 0000000000001842
Preserve Mask : 00000000000000FD
Write Mask : 0000000000000002
Command Latency : 00001388
Maximum Access Rate : 00000000
Minimum Turnaround Time : 0000
To fix this, we count up all of the possible subtable types for the
PCCT, and only report an error when there are none (which could mean
either no subtables, or no valid subtables), or there are too many.
We also change the logic so that if there is a valid subtable, we
do try to initialize it per the PCCT subtable contents. This is a
change in functionality; previously, the probe would have returned
right after the error message and would not have tried to use any
other subtable definition.
Tested on my personal laptop which showed the error previously; the
error message no longer appears and the laptop appears to operate
normally.
Signed-off-by: Al Stone <ahs3@redhat.com>
Reviewed-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-05-16 16:01:41 -06:00
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2014-11-12 19:59:38 -05:00
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mailbox: PCC: erroneous error message when parsing ACPI PCCT
There have been multiple reports of the following error message:
[ 0.068293] Error parsing PCC subspaces from PCCT
This error message is not correct. In multiple cases examined, the PCCT
(Platform Communications Channel Table) concerned is actually properly
constructed; the problem is that acpi_pcc_probe() which reads the PCCT
is making the assumption that the only valid PCCT is one that contains
subtables of one of two types: ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE or
ACPI_PCCT_TYPE_HW_REDUCED_TYPE2. The number of subtables of these
types are counted and as long as there is at least one of the desired
types, the acpi_pcc_probe() succeeds. When no subtables of these types
are found, regardless of whether or not any other subtable types are
present, the error mentioned above is reported.
In the cases reported to me personally, the PCCT contains exactly one
subtable of type ACPI_PCCT_TYPE_GENERIC_SUBSPACE. The function
acpi_pcc_probe() does not count it as a valid subtable, so believes
there to be no valid subtables, and hence outputs the error message.
An example of the PCCT being reported as erroneous yet perfectly fine
is the following:
Signature : "PCCT"
Table Length : 0000006E
Revision : 05
Checksum : A9
Oem ID : "XXXXXX"
Oem Table ID : "XXXXX "
Oem Revision : 00002280
Asl Compiler ID : "XXXX"
Asl Compiler Revision : 00000002
Flags (decoded below) : 00000001
Platform : 1
Reserved : 0000000000000000
Subtable Type : 00 [Generic Communications Subspace]
Length : 3E
Reserved : 000000000000
Base Address : 00000000DCE43018
Address Length : 0000000000001000
Doorbell Register : [Generic Address Structure]
Space ID : 01 [SystemIO]
Bit Width : 08
Bit Offset : 00
Encoded Access Width : 01 [Byte Access:8]
Address : 0000000000001842
Preserve Mask : 00000000000000FD
Write Mask : 0000000000000002
Command Latency : 00001388
Maximum Access Rate : 00000000
Minimum Turnaround Time : 0000
To fix this, we count up all of the possible subtable types for the
PCCT, and only report an error when there are none (which could mean
either no subtables, or no valid subtables), or there are too many.
We also change the logic so that if there is a valid subtable, we
do try to initialize it per the PCCT subtable contents. This is a
change in functionality; previously, the probe would have returned
right after the error message and would not have tried to use any
other subtable definition.
Tested on my personal laptop which showed the error previously; the
error message no longer appears and the laptop appears to operate
normally.
Signed-off-by: Al Stone <ahs3@redhat.com>
Reviewed-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-05-16 16:01:41 -06:00
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2014-11-12 19:59:38 -05:00
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2016-08-15 17:14:05 -07:00
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2017-06-05 16:39:08 +08:00
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2016-08-15 17:14:05 -07:00
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2017-06-05 16:39:08 +08:00
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2016-08-15 17:14:05 -07:00
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2017-06-05 16:39:08 +08:00
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2016-08-15 17:14:05 -07:00
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2014-11-12 19:59:38 -05:00
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2016-08-15 17:14:05 -07:00
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mailbox: PCC: erroneous error message when parsing ACPI PCCT
There have been multiple reports of the following error message:
[ 0.068293] Error parsing PCC subspaces from PCCT
This error message is not correct. In multiple cases examined, the PCCT
(Platform Communications Channel Table) concerned is actually properly
constructed; the problem is that acpi_pcc_probe() which reads the PCCT
is making the assumption that the only valid PCCT is one that contains
subtables of one of two types: ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE or
ACPI_PCCT_TYPE_HW_REDUCED_TYPE2. The number of subtables of these
types are counted and as long as there is at least one of the desired
types, the acpi_pcc_probe() succeeds. When no subtables of these types
are found, regardless of whether or not any other subtable types are
present, the error mentioned above is reported.
In the cases reported to me personally, the PCCT contains exactly one
subtable of type ACPI_PCCT_TYPE_GENERIC_SUBSPACE. The function
acpi_pcc_probe() does not count it as a valid subtable, so believes
there to be no valid subtables, and hence outputs the error message.
An example of the PCCT being reported as erroneous yet perfectly fine
is the following:
Signature : "PCCT"
Table Length : 0000006E
Revision : 05
Checksum : A9
Oem ID : "XXXXXX"
Oem Table ID : "XXXXX "
Oem Revision : 00002280
Asl Compiler ID : "XXXX"
Asl Compiler Revision : 00000002
Flags (decoded below) : 00000001
Platform : 1
Reserved : 0000000000000000
Subtable Type : 00 [Generic Communications Subspace]
Length : 3E
Reserved : 000000000000
Base Address : 00000000DCE43018
Address Length : 0000000000001000
Doorbell Register : [Generic Address Structure]
Space ID : 01 [SystemIO]
Bit Width : 08
Bit Offset : 00
Encoded Access Width : 01 [Byte Access:8]
Address : 0000000000001842
Preserve Mask : 00000000000000FD
Write Mask : 0000000000000002
Command Latency : 00001388
Maximum Access Rate : 00000000
Minimum Turnaround Time : 0000
To fix this, we count up all of the possible subtable types for the
PCCT, and only report an error when there are none (which could mean
either no subtables, or no valid subtables), or there are too many.
We also change the logic so that if there is a valid subtable, we
do try to initialize it per the PCCT subtable contents. This is a
change in functionality; previously, the probe would have returned
right after the error message and would not have tried to use any
other subtable definition.
Tested on my personal laptop which showed the error previously; the
error message no longer appears and the laptop appears to operate
normally.
Signed-off-by: Al Stone <ahs3@redhat.com>
Reviewed-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-05-16 16:01:41 -06:00
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2016-08-15 17:14:05 -07:00
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2014-11-12 19:59:38 -05:00
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2016-12-14 15:04:39 +08:00
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2014-11-12 19:59:38 -05:00
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2017-08-01 13:43:57 +01:00
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2014-11-12 19:59:38 -05:00
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mailbox: PCC: erroneous error message when parsing ACPI PCCT
There have been multiple reports of the following error message:
[ 0.068293] Error parsing PCC subspaces from PCCT
This error message is not correct. In multiple cases examined, the PCCT
(Platform Communications Channel Table) concerned is actually properly
constructed; the problem is that acpi_pcc_probe() which reads the PCCT
is making the assumption that the only valid PCCT is one that contains
subtables of one of two types: ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE or
ACPI_PCCT_TYPE_HW_REDUCED_TYPE2. The number of subtables of these
types are counted and as long as there is at least one of the desired
types, the acpi_pcc_probe() succeeds. When no subtables of these types
are found, regardless of whether or not any other subtable types are
present, the error mentioned above is reported.
In the cases reported to me personally, the PCCT contains exactly one
subtable of type ACPI_PCCT_TYPE_GENERIC_SUBSPACE. The function
acpi_pcc_probe() does not count it as a valid subtable, so believes
there to be no valid subtables, and hence outputs the error message.
An example of the PCCT being reported as erroneous yet perfectly fine
is the following:
Signature : "PCCT"
Table Length : 0000006E
Revision : 05
Checksum : A9
Oem ID : "XXXXXX"
Oem Table ID : "XXXXX "
Oem Revision : 00002280
Asl Compiler ID : "XXXX"
Asl Compiler Revision : 00000002
Flags (decoded below) : 00000001
Platform : 1
Reserved : 0000000000000000
Subtable Type : 00 [Generic Communications Subspace]
Length : 3E
Reserved : 000000000000
Base Address : 00000000DCE43018
Address Length : 0000000000001000
Doorbell Register : [Generic Address Structure]
Space ID : 01 [SystemIO]
Bit Width : 08
Bit Offset : 00
Encoded Access Width : 01 [Byte Access:8]
Address : 0000000000001842
Preserve Mask : 00000000000000FD
Write Mask : 0000000000000002
Command Latency : 00001388
Maximum Access Rate : 00000000
Minimum Turnaround Time : 0000
To fix this, we count up all of the possible subtable types for the
PCCT, and only report an error when there are none (which could mean
either no subtables, or no valid subtables), or there are too many.
We also change the logic so that if there is a valid subtable, we
do try to initialize it per the PCCT subtable contents. This is a
change in functionality; previously, the probe would have returned
right after the error message and would not have tried to use any
other subtable definition.
Tested on my personal laptop which showed the error previously; the
error message no longer appears and the laptop appears to operate
normally.
Signed-off-by: Al Stone <ahs3@redhat.com>
Reviewed-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-05-16 16:01:41 -06:00
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2014-11-12 19:59:38 -05:00
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mailbox: PCC: erroneous error message when parsing ACPI PCCT
There have been multiple reports of the following error message:
[ 0.068293] Error parsing PCC subspaces from PCCT
This error message is not correct. In multiple cases examined, the PCCT
(Platform Communications Channel Table) concerned is actually properly
constructed; the problem is that acpi_pcc_probe() which reads the PCCT
is making the assumption that the only valid PCCT is one that contains
subtables of one of two types: ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE or
ACPI_PCCT_TYPE_HW_REDUCED_TYPE2. The number of subtables of these
types are counted and as long as there is at least one of the desired
types, the acpi_pcc_probe() succeeds. When no subtables of these types
are found, regardless of whether or not any other subtable types are
present, the error mentioned above is reported.
In the cases reported to me personally, the PCCT contains exactly one
subtable of type ACPI_PCCT_TYPE_GENERIC_SUBSPACE. The function
acpi_pcc_probe() does not count it as a valid subtable, so believes
there to be no valid subtables, and hence outputs the error message.
An example of the PCCT being reported as erroneous yet perfectly fine
is the following:
Signature : "PCCT"
Table Length : 0000006E
Revision : 05
Checksum : A9
Oem ID : "XXXXXX"
Oem Table ID : "XXXXX "
Oem Revision : 00002280
Asl Compiler ID : "XXXX"
Asl Compiler Revision : 00000002
Flags (decoded below) : 00000001
Platform : 1
Reserved : 0000000000000000
Subtable Type : 00 [Generic Communications Subspace]
Length : 3E
Reserved : 000000000000
Base Address : 00000000DCE43018
Address Length : 0000000000001000
Doorbell Register : [Generic Address Structure]
Space ID : 01 [SystemIO]
Bit Width : 08
Bit Offset : 00
Encoded Access Width : 01 [Byte Access:8]
Address : 0000000000001842
Preserve Mask : 00000000000000FD
Write Mask : 0000000000000002
Command Latency : 00001388
Maximum Access Rate : 00000000
Minimum Turnaround Time : 0000
To fix this, we count up all of the possible subtable types for the
PCCT, and only report an error when there are none (which could mean
either no subtables, or no valid subtables), or there are too many.
We also change the logic so that if there is a valid subtable, we
do try to initialize it per the PCCT subtable contents. This is a
change in functionality; previously, the probe would have returned
right after the error message and would not have tried to use any
other subtable definition.
Tested on my personal laptop which showed the error previously; the
error message no longer appears and the laptop appears to operate
normally.
Signed-off-by: Al Stone <ahs3@redhat.com>
Reviewed-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-05-16 16:01:41 -06:00
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2014-11-12 19:59:38 -05:00
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treewide: kzalloc() -> kcalloc()
The kzalloc() function has a 2-factor argument form, kcalloc(). This
patch replaces cases of:
kzalloc(a * b, gfp)
with:
kcalloc(a * b, gfp)
as well as handling cases of:
kzalloc(a * b * c, gfp)
with:
kzalloc(array3_size(a, b, c), gfp)
as it's slightly less ugly than:
kzalloc_array(array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
kzalloc(4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
kzalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
|
kzalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
kzalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
- kzalloc
+ kcalloc
(
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
kzalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
kzalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
kzalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
kzalloc(sizeof(THING) * C2, ...)
|
kzalloc(sizeof(TYPE) * C2, ...)
|
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(C1 * C2, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * E2
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * (E2)
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12 14:03:40 -07:00
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2014-11-12 19:59:38 -05:00
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mailbox: PCC: erroneous error message when parsing ACPI PCCT
There have been multiple reports of the following error message:
[ 0.068293] Error parsing PCC subspaces from PCCT
This error message is not correct. In multiple cases examined, the PCCT
(Platform Communications Channel Table) concerned is actually properly
constructed; the problem is that acpi_pcc_probe() which reads the PCCT
is making the assumption that the only valid PCCT is one that contains
subtables of one of two types: ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE or
ACPI_PCCT_TYPE_HW_REDUCED_TYPE2. The number of subtables of these
types are counted and as long as there is at least one of the desired
types, the acpi_pcc_probe() succeeds. When no subtables of these types
are found, regardless of whether or not any other subtable types are
present, the error mentioned above is reported.
In the cases reported to me personally, the PCCT contains exactly one
subtable of type ACPI_PCCT_TYPE_GENERIC_SUBSPACE. The function
acpi_pcc_probe() does not count it as a valid subtable, so believes
there to be no valid subtables, and hence outputs the error message.
An example of the PCCT being reported as erroneous yet perfectly fine
is the following:
Signature : "PCCT"
Table Length : 0000006E
Revision : 05
Checksum : A9
Oem ID : "XXXXXX"
Oem Table ID : "XXXXX "
Oem Revision : 00002280
Asl Compiler ID : "XXXX"
Asl Compiler Revision : 00000002
Flags (decoded below) : 00000001
Platform : 1
Reserved : 0000000000000000
Subtable Type : 00 [Generic Communications Subspace]
Length : 3E
Reserved : 000000000000
Base Address : 00000000DCE43018
Address Length : 0000000000001000
Doorbell Register : [Generic Address Structure]
Space ID : 01 [SystemIO]
Bit Width : 08
Bit Offset : 00
Encoded Access Width : 01 [Byte Access:8]
Address : 0000000000001842
Preserve Mask : 00000000000000FD
Write Mask : 0000000000000002
Command Latency : 00001388
Maximum Access Rate : 00000000
Minimum Turnaround Time : 0000
To fix this, we count up all of the possible subtable types for the
PCCT, and only report an error when there are none (which could mean
either no subtables, or no valid subtables), or there are too many.
We also change the logic so that if there is a valid subtable, we
do try to initialize it per the PCCT subtable contents. This is a
change in functionality; previously, the probe would have returned
right after the error message and would not have tried to use any
other subtable definition.
Tested on my personal laptop which showed the error previously; the
error message no longer appears and the laptop appears to operate
normally.
Signed-off-by: Al Stone <ahs3@redhat.com>
Reviewed-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-05-16 16:01:41 -06:00
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2016-02-17 13:21:01 -07:00
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2016-08-15 17:14:05 -07:00
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mailbox: PCC: erroneous error message when parsing ACPI PCCT
There have been multiple reports of the following error message:
[ 0.068293] Error parsing PCC subspaces from PCCT
This error message is not correct. In multiple cases examined, the PCCT
(Platform Communications Channel Table) concerned is actually properly
constructed; the problem is that acpi_pcc_probe() which reads the PCCT
is making the assumption that the only valid PCCT is one that contains
subtables of one of two types: ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE or
ACPI_PCCT_TYPE_HW_REDUCED_TYPE2. The number of subtables of these
types are counted and as long as there is at least one of the desired
types, the acpi_pcc_probe() succeeds. When no subtables of these types
are found, regardless of whether or not any other subtable types are
present, the error mentioned above is reported.
In the cases reported to me personally, the PCCT contains exactly one
subtable of type ACPI_PCCT_TYPE_GENERIC_SUBSPACE. The function
acpi_pcc_probe() does not count it as a valid subtable, so believes
there to be no valid subtables, and hence outputs the error message.
An example of the PCCT being reported as erroneous yet perfectly fine
is the following:
Signature : "PCCT"
Table Length : 0000006E
Revision : 05
Checksum : A9
Oem ID : "XXXXXX"
Oem Table ID : "XXXXX "
Oem Revision : 00002280
Asl Compiler ID : "XXXX"
Asl Compiler Revision : 00000002
Flags (decoded below) : 00000001
Platform : 1
Reserved : 0000000000000000
Subtable Type : 00 [Generic Communications Subspace]
Length : 3E
Reserved : 000000000000
Base Address : 00000000DCE43018
Address Length : 0000000000001000
Doorbell Register : [Generic Address Structure]
Space ID : 01 [SystemIO]
Bit Width : 08
Bit Offset : 00
Encoded Access Width : 01 [Byte Access:8]
Address : 0000000000001842
Preserve Mask : 00000000000000FD
Write Mask : 0000000000000002
Command Latency : 00001388
Maximum Access Rate : 00000000
Minimum Turnaround Time : 0000
To fix this, we count up all of the possible subtable types for the
PCCT, and only report an error when there are none (which could mean
either no subtables, or no valid subtables), or there are too many.
We also change the logic so that if there is a valid subtable, we
do try to initialize it per the PCCT subtable contents. This is a
change in functionality; previously, the probe would have returned
right after the error message and would not have tried to use any
other subtable definition.
Tested on my personal laptop which showed the error previously; the
error message no longer appears and the laptop appears to operate
normally.
Signed-off-by: Al Stone <ahs3@redhat.com>
Reviewed-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-05-16 16:01:41 -06:00
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2016-08-15 17:14:05 -07:00
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mailbox: PCC: erroneous error message when parsing ACPI PCCT
There have been multiple reports of the following error message:
[ 0.068293] Error parsing PCC subspaces from PCCT
This error message is not correct. In multiple cases examined, the PCCT
(Platform Communications Channel Table) concerned is actually properly
constructed; the problem is that acpi_pcc_probe() which reads the PCCT
is making the assumption that the only valid PCCT is one that contains
subtables of one of two types: ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE or
ACPI_PCCT_TYPE_HW_REDUCED_TYPE2. The number of subtables of these
types are counted and as long as there is at least one of the desired
types, the acpi_pcc_probe() succeeds. When no subtables of these types
are found, regardless of whether or not any other subtable types are
present, the error mentioned above is reported.
In the cases reported to me personally, the PCCT contains exactly one
subtable of type ACPI_PCCT_TYPE_GENERIC_SUBSPACE. The function
acpi_pcc_probe() does not count it as a valid subtable, so believes
there to be no valid subtables, and hence outputs the error message.
An example of the PCCT being reported as erroneous yet perfectly fine
is the following:
Signature : "PCCT"
Table Length : 0000006E
Revision : 05
Checksum : A9
Oem ID : "XXXXXX"
Oem Table ID : "XXXXX "
Oem Revision : 00002280
Asl Compiler ID : "XXXX"
Asl Compiler Revision : 00000002
Flags (decoded below) : 00000001
Platform : 1
Reserved : 0000000000000000
Subtable Type : 00 [Generic Communications Subspace]
Length : 3E
Reserved : 000000000000
Base Address : 00000000DCE43018
Address Length : 0000000000001000
Doorbell Register : [Generic Address Structure]
Space ID : 01 [SystemIO]
Bit Width : 08
Bit Offset : 00
Encoded Access Width : 01 [Byte Access:8]
Address : 0000000000001842
Preserve Mask : 00000000000000FD
Write Mask : 0000000000000002
Command Latency : 00001388
Maximum Access Rate : 00000000
Minimum Turnaround Time : 0000
To fix this, we count up all of the possible subtable types for the
PCCT, and only report an error when there are none (which could mean
either no subtables, or no valid subtables), or there are too many.
We also change the logic so that if there is a valid subtable, we
do try to initialize it per the PCCT subtable contents. This is a
change in functionality; previously, the probe would have returned
right after the error message and would not have tried to use any
other subtable definition.
Tested on my personal laptop which showed the error previously; the
error message no longer appears and the laptop appears to operate
normally.
Signed-off-by: Al Stone <ahs3@redhat.com>
Reviewed-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-05-16 16:01:41 -06:00
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2016-08-15 17:14:05 -07:00
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2016-02-17 13:21:01 -07:00
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2014-11-12 19:59:38 -05:00
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2016-08-15 17:14:05 -07:00
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mailbox: PCC: erroneous error message when parsing ACPI PCCT
There have been multiple reports of the following error message:
[ 0.068293] Error parsing PCC subspaces from PCCT
This error message is not correct. In multiple cases examined, the PCCT
(Platform Communications Channel Table) concerned is actually properly
constructed; the problem is that acpi_pcc_probe() which reads the PCCT
is making the assumption that the only valid PCCT is one that contains
subtables of one of two types: ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE or
ACPI_PCCT_TYPE_HW_REDUCED_TYPE2. The number of subtables of these
types are counted and as long as there is at least one of the desired
types, the acpi_pcc_probe() succeeds. When no subtables of these types
are found, regardless of whether or not any other subtable types are
present, the error mentioned above is reported.
In the cases reported to me personally, the PCCT contains exactly one
subtable of type ACPI_PCCT_TYPE_GENERIC_SUBSPACE. The function
acpi_pcc_probe() does not count it as a valid subtable, so believes
there to be no valid subtables, and hence outputs the error message.
An example of the PCCT being reported as erroneous yet perfectly fine
is the following:
Signature : "PCCT"
Table Length : 0000006E
Revision : 05
Checksum : A9
Oem ID : "XXXXXX"
Oem Table ID : "XXXXX "
Oem Revision : 00002280
Asl Compiler ID : "XXXX"
Asl Compiler Revision : 00000002
Flags (decoded below) : 00000001
Platform : 1
Reserved : 0000000000000000
Subtable Type : 00 [Generic Communications Subspace]
Length : 3E
Reserved : 000000000000
Base Address : 00000000DCE43018
Address Length : 0000000000001000
Doorbell Register : [Generic Address Structure]
Space ID : 01 [SystemIO]
Bit Width : 08
Bit Offset : 00
Encoded Access Width : 01 [Byte Access:8]
Address : 0000000000001842
Preserve Mask : 00000000000000FD
Write Mask : 0000000000000002
Command Latency : 00001388
Maximum Access Rate : 00000000
Minimum Turnaround Time : 0000
To fix this, we count up all of the possible subtable types for the
PCCT, and only report an error when there are none (which could mean
either no subtables, or no valid subtables), or there are too many.
We also change the logic so that if there is a valid subtable, we
do try to initialize it per the PCCT subtable contents. This is a
change in functionality; previously, the probe would have returned
right after the error message and would not have tried to use any
other subtable definition.
Tested on my personal laptop which showed the error previously; the
error message no longer appears and the laptop appears to operate
normally.
Signed-off-by: Al Stone <ahs3@redhat.com>
Reviewed-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-05-16 16:01:41 -06:00
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2016-02-17 13:21:01 -07:00
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|
mailbox: PCC: erroneous error message when parsing ACPI PCCT
There have been multiple reports of the following error message:
[ 0.068293] Error parsing PCC subspaces from PCCT
This error message is not correct. In multiple cases examined, the PCCT
(Platform Communications Channel Table) concerned is actually properly
constructed; the problem is that acpi_pcc_probe() which reads the PCCT
is making the assumption that the only valid PCCT is one that contains
subtables of one of two types: ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE or
ACPI_PCCT_TYPE_HW_REDUCED_TYPE2. The number of subtables of these
types are counted and as long as there is at least one of the desired
types, the acpi_pcc_probe() succeeds. When no subtables of these types
are found, regardless of whether or not any other subtable types are
present, the error mentioned above is reported.
In the cases reported to me personally, the PCCT contains exactly one
subtable of type ACPI_PCCT_TYPE_GENERIC_SUBSPACE. The function
acpi_pcc_probe() does not count it as a valid subtable, so believes
there to be no valid subtables, and hence outputs the error message.
An example of the PCCT being reported as erroneous yet perfectly fine
is the following:
Signature : "PCCT"
Table Length : 0000006E
Revision : 05
Checksum : A9
Oem ID : "XXXXXX"
Oem Table ID : "XXXXX "
Oem Revision : 00002280
Asl Compiler ID : "XXXX"
Asl Compiler Revision : 00000002
Flags (decoded below) : 00000001
Platform : 1
Reserved : 0000000000000000
Subtable Type : 00 [Generic Communications Subspace]
Length : 3E
Reserved : 000000000000
Base Address : 00000000DCE43018
Address Length : 0000000000001000
Doorbell Register : [Generic Address Structure]
Space ID : 01 [SystemIO]
Bit Width : 08
Bit Offset : 00
Encoded Access Width : 01 [Byte Access:8]
Address : 0000000000001842
Preserve Mask : 00000000000000FD
Write Mask : 0000000000000002
Command Latency : 00001388
Maximum Access Rate : 00000000
Minimum Turnaround Time : 0000
To fix this, we count up all of the possible subtable types for the
PCCT, and only report an error when there are none (which could mean
either no subtables, or no valid subtables), or there are too many.
We also change the logic so that if there is a valid subtable, we
do try to initialize it per the PCCT subtable contents. This is a
change in functionality; previously, the probe would have returned
right after the error message and would not have tried to use any
other subtable definition.
Tested on my personal laptop which showed the error previously; the
error message no longer appears and the laptop appears to operate
normally.
Signed-off-by: Al Stone <ahs3@redhat.com>
Reviewed-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-05-16 16:01:41 -06:00
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2014-11-12 19:59:38 -05:00
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|
|
2016-02-17 13:21:01 -07:00
|
|
|
|
mailbox: PCC: erroneous error message when parsing ACPI PCCT
There have been multiple reports of the following error message:
[ 0.068293] Error parsing PCC subspaces from PCCT
This error message is not correct. In multiple cases examined, the PCCT
(Platform Communications Channel Table) concerned is actually properly
constructed; the problem is that acpi_pcc_probe() which reads the PCCT
is making the assumption that the only valid PCCT is one that contains
subtables of one of two types: ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE or
ACPI_PCCT_TYPE_HW_REDUCED_TYPE2. The number of subtables of these
types are counted and as long as there is at least one of the desired
types, the acpi_pcc_probe() succeeds. When no subtables of these types
are found, regardless of whether or not any other subtable types are
present, the error mentioned above is reported.
In the cases reported to me personally, the PCCT contains exactly one
subtable of type ACPI_PCCT_TYPE_GENERIC_SUBSPACE. The function
acpi_pcc_probe() does not count it as a valid subtable, so believes
there to be no valid subtables, and hence outputs the error message.
An example of the PCCT being reported as erroneous yet perfectly fine
is the following:
Signature : "PCCT"
Table Length : 0000006E
Revision : 05
Checksum : A9
Oem ID : "XXXXXX"
Oem Table ID : "XXXXX "
Oem Revision : 00002280
Asl Compiler ID : "XXXX"
Asl Compiler Revision : 00000002
Flags (decoded below) : 00000001
Platform : 1
Reserved : 0000000000000000
Subtable Type : 00 [Generic Communications Subspace]
Length : 3E
Reserved : 000000000000
Base Address : 00000000DCE43018
Address Length : 0000000000001000
Doorbell Register : [Generic Address Structure]
Space ID : 01 [SystemIO]
Bit Width : 08
Bit Offset : 00
Encoded Access Width : 01 [Byte Access:8]
Address : 0000000000001842
Preserve Mask : 00000000000000FD
Write Mask : 0000000000000002
Command Latency : 00001388
Maximum Access Rate : 00000000
Minimum Turnaround Time : 0000
To fix this, we count up all of the possible subtable types for the
PCCT, and only report an error when there are none (which could mean
either no subtables, or no valid subtables), or there are too many.
We also change the logic so that if there is a valid subtable, we
do try to initialize it per the PCCT subtable contents. This is a
change in functionality; previously, the probe would have returned
right after the error message and would not have tried to use any
other subtable definition.
Tested on my personal laptop which showed the error previously; the
error message no longer appears and the laptop appears to operate
normally.
Signed-off-by: Al Stone <ahs3@redhat.com>
Reviewed-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-05-16 16:01:41 -06:00
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2016-08-15 17:14:05 -07:00
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|
mailbox: PCC: erroneous error message when parsing ACPI PCCT
There have been multiple reports of the following error message:
[ 0.068293] Error parsing PCC subspaces from PCCT
This error message is not correct. In multiple cases examined, the PCCT
(Platform Communications Channel Table) concerned is actually properly
constructed; the problem is that acpi_pcc_probe() which reads the PCCT
is making the assumption that the only valid PCCT is one that contains
subtables of one of two types: ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE or
ACPI_PCCT_TYPE_HW_REDUCED_TYPE2. The number of subtables of these
types are counted and as long as there is at least one of the desired
types, the acpi_pcc_probe() succeeds. When no subtables of these types
are found, regardless of whether or not any other subtable types are
present, the error mentioned above is reported.
In the cases reported to me personally, the PCCT contains exactly one
subtable of type ACPI_PCCT_TYPE_GENERIC_SUBSPACE. The function
acpi_pcc_probe() does not count it as a valid subtable, so believes
there to be no valid subtables, and hence outputs the error message.
An example of the PCCT being reported as erroneous yet perfectly fine
is the following:
Signature : "PCCT"
Table Length : 0000006E
Revision : 05
Checksum : A9
Oem ID : "XXXXXX"
Oem Table ID : "XXXXX "
Oem Revision : 00002280
Asl Compiler ID : "XXXX"
Asl Compiler Revision : 00000002
Flags (decoded below) : 00000001
Platform : 1
Reserved : 0000000000000000
Subtable Type : 00 [Generic Communications Subspace]
Length : 3E
Reserved : 000000000000
Base Address : 00000000DCE43018
Address Length : 0000000000001000
Doorbell Register : [Generic Address Structure]
Space ID : 01 [SystemIO]
Bit Width : 08
Bit Offset : 00
Encoded Access Width : 01 [Byte Access:8]
Address : 0000000000001842
Preserve Mask : 00000000000000FD
Write Mask : 0000000000000002
Command Latency : 00001388
Maximum Access Rate : 00000000
Minimum Turnaround Time : 0000
To fix this, we count up all of the possible subtable types for the
PCCT, and only report an error when there are none (which could mean
either no subtables, or no valid subtables), or there are too many.
We also change the logic so that if there is a valid subtable, we
do try to initialize it per the PCCT subtable contents. This is a
change in functionality; previously, the probe would have returned
right after the error message and would not have tried to use any
other subtable definition.
Tested on my personal laptop which showed the error previously; the
error message no longer appears and the laptop appears to operate
normally.
Signed-off-by: Al Stone <ahs3@redhat.com>
Reviewed-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-05-16 16:01:41 -06:00
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2016-08-15 17:14:05 -07:00
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|
mailbox: PCC: erroneous error message when parsing ACPI PCCT
There have been multiple reports of the following error message:
[ 0.068293] Error parsing PCC subspaces from PCCT
This error message is not correct. In multiple cases examined, the PCCT
(Platform Communications Channel Table) concerned is actually properly
constructed; the problem is that acpi_pcc_probe() which reads the PCCT
is making the assumption that the only valid PCCT is one that contains
subtables of one of two types: ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE or
ACPI_PCCT_TYPE_HW_REDUCED_TYPE2. The number of subtables of these
types are counted and as long as there is at least one of the desired
types, the acpi_pcc_probe() succeeds. When no subtables of these types
are found, regardless of whether or not any other subtable types are
present, the error mentioned above is reported.
In the cases reported to me personally, the PCCT contains exactly one
subtable of type ACPI_PCCT_TYPE_GENERIC_SUBSPACE. The function
acpi_pcc_probe() does not count it as a valid subtable, so believes
there to be no valid subtables, and hence outputs the error message.
An example of the PCCT being reported as erroneous yet perfectly fine
is the following:
Signature : "PCCT"
Table Length : 0000006E
Revision : 05
Checksum : A9
Oem ID : "XXXXXX"
Oem Table ID : "XXXXX "
Oem Revision : 00002280
Asl Compiler ID : "XXXX"
Asl Compiler Revision : 00000002
Flags (decoded below) : 00000001
Platform : 1
Reserved : 0000000000000000
Subtable Type : 00 [Generic Communications Subspace]
Length : 3E
Reserved : 000000000000
Base Address : 00000000DCE43018
Address Length : 0000000000001000
Doorbell Register : [Generic Address Structure]
Space ID : 01 [SystemIO]
Bit Width : 08
Bit Offset : 00
Encoded Access Width : 01 [Byte Access:8]
Address : 0000000000001842
Preserve Mask : 00000000000000FD
Write Mask : 0000000000000002
Command Latency : 00001388
Maximum Access Rate : 00000000
Minimum Turnaround Time : 0000
To fix this, we count up all of the possible subtable types for the
PCCT, and only report an error when there are none (which could mean
either no subtables, or no valid subtables), or there are too many.
We also change the logic so that if there is a valid subtable, we
do try to initialize it per the PCCT subtable contents. This is a
change in functionality; previously, the probe would have returned
right after the error message and would not have tried to use any
other subtable definition.
Tested on my personal laptop which showed the error previously; the
error message no longer appears and the laptop appears to operate
normally.
Signed-off-by: Al Stone <ahs3@redhat.com>
Reviewed-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-05-16 16:01:41 -06:00
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2016-08-15 17:14:05 -07:00
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2016-02-17 13:21:01 -07:00
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2014-11-12 19:59:38 -05:00
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mailbox: PCC: erroneous error message when parsing ACPI PCCT
There have been multiple reports of the following error message:
[ 0.068293] Error parsing PCC subspaces from PCCT
This error message is not correct. In multiple cases examined, the PCCT
(Platform Communications Channel Table) concerned is actually properly
constructed; the problem is that acpi_pcc_probe() which reads the PCCT
is making the assumption that the only valid PCCT is one that contains
subtables of one of two types: ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE or
ACPI_PCCT_TYPE_HW_REDUCED_TYPE2. The number of subtables of these
types are counted and as long as there is at least one of the desired
types, the acpi_pcc_probe() succeeds. When no subtables of these types
are found, regardless of whether or not any other subtable types are
present, the error mentioned above is reported.
In the cases reported to me personally, the PCCT contains exactly one
subtable of type ACPI_PCCT_TYPE_GENERIC_SUBSPACE. The function
acpi_pcc_probe() does not count it as a valid subtable, so believes
there to be no valid subtables, and hence outputs the error message.
An example of the PCCT being reported as erroneous yet perfectly fine
is the following:
Signature : "PCCT"
Table Length : 0000006E
Revision : 05
Checksum : A9
Oem ID : "XXXXXX"
Oem Table ID : "XXXXX "
Oem Revision : 00002280
Asl Compiler ID : "XXXX"
Asl Compiler Revision : 00000002
Flags (decoded below) : 00000001
Platform : 1
Reserved : 0000000000000000
Subtable Type : 00 [Generic Communications Subspace]
Length : 3E
Reserved : 000000000000
Base Address : 00000000DCE43018
Address Length : 0000000000001000
Doorbell Register : [Generic Address Structure]
Space ID : 01 [SystemIO]
Bit Width : 08
Bit Offset : 00
Encoded Access Width : 01 [Byte Access:8]
Address : 0000000000001842
Preserve Mask : 00000000000000FD
Write Mask : 0000000000000002
Command Latency : 00001388
Maximum Access Rate : 00000000
Minimum Turnaround Time : 0000
To fix this, we count up all of the possible subtable types for the
PCCT, and only report an error when there are none (which could mean
either no subtables, or no valid subtables), or there are too many.
We also change the logic so that if there is a valid subtable, we
do try to initialize it per the PCCT subtable contents. This is a
change in functionality; previously, the probe would have returned
right after the error message and would not have tried to use any
other subtable definition.
Tested on my personal laptop which showed the error previously; the
error message no longer appears and the laptop appears to operate
normally.
Signed-off-by: Al Stone <ahs3@redhat.com>
Reviewed-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-05-16 16:01:41 -06:00
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2014-11-12 19:59:38 -05:00
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2016-08-15 17:14:05 -07:00
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2014-11-12 19:59:38 -05:00
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2015-02-05 00:40:08 +01:00
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2014-11-12 19:59:38 -05:00
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2015-01-14 09:10:56 +08:00
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2015-02-05 00:40:08 +01:00
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2015-01-14 09:10:56 +08:00
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2014-11-12 19:59:38 -05:00
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2015-08-05 09:40:24 -04:00
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