linux-kernel - Re: [PATCH 1/1] ACPI / tables: add DSDT AmlCode new declaration name support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 12 Dec 2018 01:56:15 +0000
From:   "Wang, Dongsheng" <dongsheng.wang@...-semitech.com>
To:     "robert.moore@...el.com" <robert.moore@...el.com>,
        "rjw@...ysocki.net" <rjw@...ysocki.net>
CC:     "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Zheng, Joey" <yu.zheng@...-semitech.com>
Subject: Re: [PATCH 1/1] ACPI / tables: add DSDT AmlCode new declaration name
 support

Hello all,

Any comments about this patch?

Cheers
Dongsheng

On 2018/11/23 16:12, Wang, Dongsheng wrote:
> Hello Robert,
>
> Do you have any comments about this patch?
> Thanks.
>
>
> Cheers
> Dongsheng
>
> On 2018/11/13 18:46, Wang, Dongsheng wrote:
>> The new naming rule is added in acpica version 20180427.
>> So the dsdt aml code name changes from "AmlCode" to "dsdt_aml_code".
>>
>> The patch that introduces naming rules is:
>> https://github.com/acpica/acpica/commit/f9a88a4c1cd020b6a5475d63b29626852a0b5f37
>>
>> Tested:
>> ACPICA release version 20180427+.
>> ARM64: QCOM QDF2400
>> GCC: 4.8.5 20150623
>>
>> Signed-off-by: Wang Dongsheng <dongsheng.wang@...-semitech.com>
>> ---
>>  drivers/acpi/Kconfig  |  2 +-
>>  drivers/acpi/tables.c | 10 ++++++++--
>>  2 files changed, 9 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
>> index 9705fc986da9..15ab53a52fdc 100644
>> --- a/drivers/acpi/Kconfig
>> +++ b/drivers/acpi/Kconfig
>> @@ -336,7 +336,7 @@ config ACPI_CUSTOM_DSDT_FILE
>>  	  See Documentation/acpi/dsdt-override.txt
>>  
>>  	  Enter the full path name to the file which includes the AmlCode
>> -	  declaration.
>> +	  or dsdt_aml_code declaration.
>>  
>>  	  If unsure, don't enter a file name.
>>  
>> diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
>> index a3d012b08fc5..297020bbaade 100644
>> --- a/drivers/acpi/tables.c
>> +++ b/drivers/acpi/tables.c
>> @@ -713,6 +713,9 @@ acpi_os_physical_table_override(struct acpi_table_header *existing_table,
>>  					  table_length);
>>  }
>>  
>> +static void *amlcode __attribute__ ((weakref("AmlCode")));
>> +static void *dsdt_amlcode __attribute__ ((weakref("dsdt_aml_code")));
>> +
>>  acpi_status
>>  acpi_os_table_override(struct acpi_table_header *existing_table,
>>  		       struct acpi_table_header **new_table)
>> @@ -723,8 +726,11 @@ acpi_os_table_override(struct acpi_table_header *existing_table,
>>  	*new_table = NULL;
>>  
>>  #ifdef CONFIG_ACPI_CUSTOM_DSDT
>> -	if (strncmp(existing_table->signature, "DSDT", 4) == 0)
>> -		*new_table = (struct acpi_table_header *)AmlCode;
>> +	if (!strncmp(existing_table->signature, "DSDT", 4)) {
>> +		*new_table = (struct acpi_table_header *)&amlcode;
>> +		if (!(*new_table))
>> +			*new_table = (struct acpi_table_header *)&dsdt_amlcode;
>> +	}
>>  #endif
>>  	if (*new_table != NULL)
>>  		acpi_table_taint(existing_table);
>
>