linux-kernel - Re: [PATCH v3] firmware: qcom_scm: Clear download bit during reboot

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]

Message-ID: <CAOX2RU4WcNXu42W6_459wKzyo+6onNRhE+=3usmSRB9AEF3MtA@mail.gmail.com>
Date:   Thu, 18 May 2023 13:01:51 +0200
From:   Robert Marko <robimarko@...il.com>
To:     Mukesh Ojha <quic_mojha@...cinc.com>
Cc:     agross@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] firmware: qcom_scm: Clear download bit during reboot

On Thu, 18 May 2023 at 12:44, Mukesh Ojha <quic_mojha@...cinc.com> wrote:
>
>
>
> On 5/18/2023 3:45 PM, Robert Marko wrote:
> >
> > On 16. 03. 2023. 16:14, Mukesh Ojha wrote:
> >> During normal restart of a system download bit should
> >> be cleared irrespective of whether download mode is
> >> set or not.
> >>
> >> Fixes: 8c1b7dc9ba22 ("firmware: qcom: scm: Expose download-mode control")
> >> Signed-off-by: Mukesh Ojha <quic_mojha@...cinc.com>
> >
> > Hi, this has been backported to 5.15.111, however it seems to be
> > breaking reboot
>
> Thanks for reporting the issue, by any chance enabling
> CONFIG_QCOM_SCM_DOWNLOAD_MODE_DEFAULT + reboot works on
> IPQ4019 ?

Unfortunately not, the board still hangs in SBL.

Regards,
Robert

>
> > on IPQ4019 by causing the board to then hang in SBL with:
> > root@...nWrt:/# reboot
> > root@...nWrt:/# [   76.473541] device lan1 left promiscuous mode
> > [   76.474204] br-lan: port 1(lan1) entered disabled state
> > [   76.527975] device lan2 left promiscuous mode
> > [   76.530301] br-lan: port 2(lan2) entered disabled state
> > [   76.579376] device lan3 left promiscuous mode
> > [   76.581698] br-lan: port 3(lan3) entered disabled state
> > [   76.638434] device lan4 left promiscuous mode
> > [   76.638777] br-lan: port 4(lan4) entered disabled state
> > [   76.978489] qca8k-ipq4019 c000000.switch wan: Link is Down
> > [   76.978883] device eth0 left promiscuous mode
> > [   76.987077] ipqess-edma c080000.ethernet eth0: Link is Down
> > [
> > Format: Log Type - Time(microsec) - Message - Optional Info
> > Log Type: B - Since Boot(Power On Reset),  D - Delta,  S - Statistic
> > S - QC_IMAGE_VERSION_STRING=BOOT.BF.3.1.1-00123
> > S - IMAGE_VARIANT_STRING=DAABANAZA
> > S - OEM_IMAGE_VERSION_STRING=CRM
> > S - Boot Config, 0x00000021
> > S - Reset status Config, 0x00000010
> > S - Core 0 Frequency, 0 MHz
> > B -       261 - PBL, Start
> > B -      1339 - bootable_media_detect_entry, Start
> > B -      1679 - bootable_media_detect_success, Start
> > B -      1693 - elf_loader_entry, Start
> > B -      5076 - auth_hash_seg_entry, Start
> > B -      7223 - auth_hash_seg_exit, Start
> > B -    578349 - elf_segs_hash_verify_entry, Start
> > B -    696356 - PBL, End
> > B -    696380 - SBL1, Start
> > B -    787236 - pm_device_init, Start
> > D -         7 - pm_device_init, Delta
> > B -    788701 - boot_flash_init, Start
> > D -     52782 - boot_flash_init, Delta
> > B -    845625 - boot_config_data_table_init, Start
> > D -      3836 - boot_config_data_table_init, Delta - (419 Bytes)
> > B -    852841 - clock_init, Start
> > D -      7566 - clock_init, Delta
> > B -    864883 - CDT version:2,Platform ID:9,Major ID:0,Minor
> > ID:0,Subtype:64
> > B -    868413 - sbl1_ddr_set_params, Start
> > B -    873402 - cpr_init, Start
> > D -         2 - cpr_init, Delta
> > B -    877842 - Pre_DDR_clock_init, Start
> > D -         4 - Pre_DDR_clock_init, Delta
> > D -     13234 - sbl1_ddr_set_params, Delta
> > B -    891155 - pm_driver_init, Start
> > D -         2 - pm_driver_init, Delta
> > B -    909105 - Image Load, Start
> > B -   1030210 - Boot error ocuured!. Error code: 303d
> >
> > Reverting the commit fixes rebooting.
> >
> > Regards,
> > Robert
> >
> >> ---
> >> Changes in v3:
> >>    - Added Fixes tag.
> >>    - Removed it from below patch series, as it makes sense to go this
> >> independently.
> >>
> >> https://lore.kernel.org/lkml/1677664555-30191-1-git-send-email-quic_mojha@quicinc.com/
> >>
> >> Changes in v2:
> >>    - No change.
> >>
> >>   drivers/firmware/qcom_scm.c | 3 +--
> >>   1 file changed, 1 insertion(+), 2 deletions(-)
> >>
> >> diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
> >> index 468d4d5..3e020d1 100644
> >> --- a/drivers/firmware/qcom_scm.c
> >> +++ b/drivers/firmware/qcom_scm.c
> >> @@ -1506,8 +1506,7 @@ static int qcom_scm_probe(struct platform_device
> >> *pdev)
> >>   static void qcom_scm_shutdown(struct platform_device *pdev)
> >>   {
> >>       /* Clean shutdown, disable download mode to allow normal restart */
> >> -    if (download_mode)
> >> -        qcom_scm_set_download_mode(false);
> >> +    qcom_scm_set_download_mode(false);
> >>   }
> >>   static const struct of_device_id qcom_scm_dt_match[] = {