linux-kernel - Re: [PATCH v6 2/2] misc: fastrpc: Increase unsigned PD initmem size

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Message-ID: <be9ffb28-3ad7-4537-bf80-45ea43f97374@quicinc.com>
Date: Tue, 23 Jul 2024 10:06:38 +0530
From: Ekansh Gupta <quic_ekangupt@...cinc.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
CC: <srinivas.kandagatla@...aro.org>, <linux-arm-msm@...r.kernel.org>,
        <gregkh@...uxfoundation.org>, <quic_bkumar@...cinc.com>,
        <linux-kernel@...r.kernel.org>, <quic_chennak@...cinc.com>,
        <dri-devel@...ts.freedesktop.org>, <arnd@...db.de>,
        stable
	<stable@...nel.org>
Subject: Re: [PATCH v6 2/2] misc: fastrpc: Increase unsigned PD initmem size



On 7/22/2024 2:04 PM, Dmitry Baryshkov wrote:
> On Mon, Jul 22, 2024 at 01:32:00PM GMT, Ekansh Gupta wrote:
>> For unsigned PD offloading requirement, additional memory is required
>> because of additional static heap initialization. Without this
>> additional memory, PD initialization would fail. Increase the initmem
>> size by 2MB for unsigned PD initmem buffer allocation. Any additional
>> memory sent to DSP during PD init is used as the PD heap.
> From the previous commit message I had the feeling that DSP can request
> more memory if required. Currently you are stating that PD init would
> fail if it doesn't have enough mem.

DSP PD can request for memory only for PD heap and that too once the PD
initialization is complete.

>
>> Fixes: 7f1f481263c3 ("misc: fastrpc: check before loading process to the DSP")
>> Cc: stable <stable@...nel.org>
>> Signed-off-by: Ekansh Gupta <quic_ekangupt@...cinc.com>
>> ---
>>  drivers/misc/fastrpc.c | 8 ++++++++
>>  1 file changed, 8 insertions(+)
>>