> On 4 November 2016 at 02:26, Alison Wang <alison.w...@nxp.com> wrote: > > York, > > > > > > > > No, he don’t have my 32-bit kernel image. I am not > > sure he is using 32-bit kernel or 64-bit kernel. > > > > > > > > Ryan, > > > > > > > > I am not familiar with the boards you tested, > > The FVP Foundation model is free to use from ARM. The entire software > stack I'm using is available via ARM's portal: > > https://community.arm.com/groups/arm-development-platforms > > > > so I have some > > questions, please help to work with me to find the root cause. > > > > > > > > 1. Are you loading 32-bit kernel or 64-bit kernel? > > > > I'm loading the "standard" 64-bit kernel. I was using a kernel based > off 4.8: > > https://git.linaro.org/landing-teams/working/arm/kernel- > release.git/log/?h=latest-armlt-20161001 > > > 2. Is CONFIG_ARMV8_SWITCH_TO_EL1 defined on these boards? > > > > I guess it is for the FVP models, if I grep for it, it's in my > configs' .h file: > > include/configs/vexpress_aemv8a.h:15:#define CONFIG_ARMV8_SWITCH_TO_EL1 > > ------------------------------------------------------- > #ifdef CONFIG_TARGET_VEXPRESS64_BASE_FVP #ifndef CONFIG_SEMIHOSTING > #error CONFIG_TARGET_VEXPRESS64_BASE_FVP requires CONFIG_SEMIHOSTING > #endif #define CONFIG_ARMV8_SWITCH_TO_EL1 #endif > ------------------------------------------------------- > > But it isn't in my Juno config. > > > > 3. Are you using some secure firmware on these boards? In > detail, I > > want to know which EL is running on these boards when calling > > armv8_switch_to_el2 in arch/arm/lib/bootm.c. If it is already running > > in EL2 when calling armv8_swith_to_el2, the attached patch with PSCI > > enabled is needed. > > > > I'm using what ARM consider the "standard" boot flow. I'm using ARM > Trusted Firmware to boot u-boot which in turn boots an arm64 kernel. > > I'd expect my setup to still work after you've added patches to allow > an aarch32 kernel to be booted, but I guess you're changing the boot > path for non-aarch32 kernels also. [Alison Wang] Of course, although I add these patches to support aarch32 kernel, I should make sure aarch64 kernel work too.
If you are using ARM Trusted Firmware to boot u-boot, I want to know what EL is running for your U-Boot. If it is running in EL2 or EL1, please add the attached patch to test again. Thanks. > > Regards, > Ryan. > > > > > > > > > > > Best Regards, > > > > Alison Wang > > > > > > > > From: york sun > > Sent: Friday, November 04, 2016 10:04 AM > > To: ryan.har...@linaro.org > > Cc: Wang Huan <b18...@freescale.com>; ag...@suse.de; Scott Wood > > <scott.w...@nxp.com>; Stuart Yoder <stuart.yo...@nxp.com>; Leo Li > > <leoyang...@nxp.com>; feng...@phytium.com.cn; mon...@monstr.eu; > > thomas...@samsung.com; mk7.k...@samsung.com; u-boot@lists.denx.de; > > Jason Jin <jason....@nxp.com>; Alison Wang <alison.w...@nxp.com> > > > > > > Subject: Re: [PATCH v7 1/2] armv8: Support loading 32-bit OS in > > AArch32 execution state > > > > > > > > Alison, > > > > Does Ryan have your 32-bit kernel image? I think kernel 32-bit > doesn't > > support spin table. Please work with Ryan if your PSCI patch is > > required for the test. > > > > York > > > > > > > > -------- Original Message -------- > > From: Ryan Harkin <ryan.har...@linaro.org> > > Sent: Thursday, November 3, 2016 12:17 PM > > To: york sun <york....@nxp.com> > > Subject: Re: [PATCH v7 1/2] armv8: Support loading 32-bit OS in > > AArch32 execution state > > CC: Alison Wang <b18...@freescale.com>,ag...@suse.de,Scott Wood > > <scott.w...@nxp.com>,Stuart Yoder <stuart.yo...@nxp.com>,Leo Li > > > <leoyang...@nxp.com>,feng...@phytium.com.cn,mon...@monstr.eu,thomas.ab > > @samsung.com,mk7.k...@samsung.com,u-boot@lists.denx.de,Jason > > Jin <jason....@nxp.com>,Alison Wang <alison.w...@nxp.com> > > > > Hi York/Alison, > > > > Sorry for not having had time to look at this earlier. > > > > > > On 26 October 2016 at 17:54, york sun <york....@nxp.com> wrote: > >> On 10/07/2016 11:56 PM, Alison Wang wrote: > >>> To support loading a 32-bit OS, the execution state will change > from > >>> AArch64 to AArch32 when jumping to kernel. > >>> > >>> The architecture information will be got through checking FIT image, > >>> then U-Boot will load 32-bit OS or 64-bit OS automatically. > >>> > >>> Signed-off-by: Ebony Zhu <ebony....@nxp.com> > >>> Signed-off-by: Alison Wang <alison.w...@nxp.com> > >>> Signed-off-by: Chenhui Zhao <chenhui.z...@nxp.com> > >>> --- > >>> Changes in v7: > >>> - Move the call for armv8_switch_to_el2_m into this patch. > >>> > >> > >> Reviewers, > >> > >> May I have your comment please? I intend to merge this set when the > >> merge window opens. > >> > > > > I've just tested these two patches on ARM's FVP Foundation and AEMv8 > > models and ARM's Juno board. > > > > In all cases, with this patchset, the kernel fails to start. I see a > > continuous reboot, where the kernel starts then immediately resets: > > > > -------------------------------------------------- > > Starting kernel ... > > > > resetting ... > > -------------------------------------------------- > > > > So I wouldn't want to see these patches merged. > > > > Regards, > > Ryan.
0001-armv8-fsl-layerscape-Support-loading-32-bit-OS-with-.patch
Description: 0001-armv8-fsl-layerscape-Support-loading-32-bit-OS-with-.patch
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