linux-kernel - Re: [PATCH v3] soc: qcom: llcc: Fix slice configuration values for SC8280XP

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Message-ID: <ZAXxYPZ/zarxcsNF@linaro.org>
Date:   Mon, 6 Mar 2023 15:57:52 +0200
From:   Abel Vesa <abel.vesa@...aro.org>
To:     Johan Hovold <johan@...nel.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Sai Prakash Ranjan <quic_saipraka@...cinc.com>,
        Juerg Haefliger <juerg.haefliger@...onical.com>,
        linux-arm-msm@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        stable@...r.kernel.org
Subject: Re: [PATCH v3] soc: qcom: llcc: Fix slice configuration values for
 SC8280XP

On 23-03-06 14:01:20, Johan Hovold wrote:
> On Sun, Feb 19, 2023 at 06:57:01PM +0200, Abel Vesa wrote:
> > The slice IDs for CVPFW, CPUSS1 and CPUWHT currently overflow the 32bit
> > LLCC config registers. Fix that by using the slice ID values taken from
> > the latest LLCC SC table.
> 
> This still doesn't really explain what the impact of this bug is (e.g.
> for people doing backports), but I guess this will do.
> 

Sent a v4 here:
https://lore.kernel.org/all/20230306135527.509796-1-abel.vesa@linaro.org/

> > Fixes: ec69dfbdc426 ("soc: qcom: llcc: Add sc8180x and sc8280xp configurations")
> > Cc: stable@...r.kernel.org	# 5.19+
> > Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
> > Tested-by: Juerg Haefliger <juerg.haefliger@...onical.com>
> > Reviewed-by: Sai Prakash Ranjan <quic_saipraka@...cinc.com>
> > Acked-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> 
> Reviewed-by: Johan Hovold <johan+linaro@...nel.org>

Added your R-b tag.

Thanks.

> 
> > ---
> > 
> > The v2 is here:
> > https://lore.kernel.org/all/20230127144724.1292580-1-abel.vesa@linaro.org/
> > 
> > Changes since v2:
> >  * specifically mentioned the 3 slice IDs that are being fixed and
> >    what is happening without this patch
> >  * added stabke Cc line
> >  * added Juerg's T-b tag
> >  * added Sai's R-b tag
> >  * added Konrad's A-b tag
> > 
> > Changes since v1:
> >  * dropped the LLCC_GPU and LLCC_WRCACHE max_cap changes
> >  * took the new values from documentatio this time rather than
> >    downstream kernel
> > 
> >  drivers/soc/qcom/llcc-qcom.c | 6 +++---
> >  1 file changed, 3 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/soc/qcom/llcc-qcom.c b/drivers/soc/qcom/llcc-qcom.c
> > index 23ce2f78c4ed..26efe12012a0 100644
> > --- a/drivers/soc/qcom/llcc-qcom.c
> > +++ b/drivers/soc/qcom/llcc-qcom.c
> > @@ -191,9 +191,9 @@ static const struct llcc_slice_config sc8280xp_data[] = {
> >  	{ LLCC_CVP,      28, 512,  3, 1, 0xfff, 0x0, 0, 0, 0, 1, 0, 0 },
> >  	{ LLCC_APTCM,    30, 1024, 3, 1, 0x0,   0x1, 1, 0, 0, 1, 0, 0 },
> >  	{ LLCC_WRCACHE,  31, 1024, 1, 1, 0xfff, 0x0, 0, 0, 0, 0, 1, 0 },
> > -	{ LLCC_CVPFW,    32, 512,  1, 0, 0xfff, 0x0, 0, 0, 0, 1, 0, 0 },
> > -	{ LLCC_CPUSS1,   33, 2048, 1, 1, 0xfff, 0x0, 0, 0, 0, 1, 0, 0 },
> > -	{ LLCC_CPUHWT,   36, 512,  1, 1, 0xfff, 0x0, 0, 0, 0, 0, 1, 0 },
> > +	{ LLCC_CVPFW,    17, 512,  1, 0, 0xfff, 0x0, 0, 0, 0, 1, 0, 0 },
> > +	{ LLCC_CPUSS1,   3, 2048, 1, 1, 0xfff, 0x0, 0, 0, 0, 1, 0, 0 },
> > +	{ LLCC_CPUHWT,   5, 512,  1, 1, 0xfff, 0x0, 0, 0, 0, 0, 1, 0 },
> >  };
> >  
> >  static const struct llcc_slice_config sdm845_data[] =  {