linux-kernel - Re: [PATCH v2] arm64: dts: ti: k3-am64-main: Update the location of ATF in SRAM and increase its max size

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, 9 Jun 2021 20:52:07 +0530
From:   Aswath Govindraju <a-govindraju@...com>
To:     Lokesh Vutla <lokeshvutla@...com>
CC:     Vignesh Raghavendra <vigneshr@...com>, Suman Anna <s-anna@...com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Nishanth Menon <nm@...com>, Tero Kristo <kristo@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] arm64: dts: ti: k3-am64-main: Update the location of
 ATF in SRAM and increase its max size

Hi Lokesh,

On 09/06/21 7:59 pm, Lokesh Vutla wrote:
> 
> 
> On 07/06/21 7:08 pm, Aswath Govindraju wrote:
>> Due to a limitation for USB DFU boot mode, SPL load address has to be less
>> than  or equal to 0x70001000. So, load address of SPL and ATF have been
>> moved to 0x70000000 and 0x701a0000 respectively.
>>
>> Also, the maximum size of ATF has been increased to 0x1c000 [1].
>>
>> Therefore, update ATF's location and maximum size accordingly in the device
>> tree file.
>>
>> [1] - https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git/commit/?id=2fb5312f61a7de8b7a70e1639199c4f14a10b6f9
>>
>> Signed-off-by: Aswath Govindraju <a-govindraju@...com>
>> ---
>>  arch/arm64/boot/dts/ti/k3-am64-main.dtsi | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
>> index ca59d1f711f8..fcd12b6f10f6 100644
>> --- a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
>> +++ b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
>> @@ -13,8 +13,8 @@
>>  		#size-cells = <1>;
>>  		ranges = <0x0 0x00 0x70000000 0x200000>;
>>  
>> -		atf-sram@0 {
>> -			reg = <0x0 0x1a000>;
>> +		atf-sram@...000 {
>> +			reg = <0x1a0000 0x1c000>;
> 
> After thinking a bot more, isn't size be 0x20000?
> ATF is allocated with 125KB no? no point keeping the ~3 as hole IMO.
> 

The max size of ATF as defined above in [1] is 0x1c000 and as the
argument has to reflect it I have modified it to the same.

Thanks,
Aswath


> Thanks and regards,
> Lokesh
> 
>>  		};
>>  	};
>>  
>>