xen/arch/arm/platforms/Makefile | 1 + xen/arch/arm/platforms/brcm-raspberry-pi.c | 55 ++++++++++++++++++++++ xen/drivers/char/ns16550.c | 7 +++ 3 files changed, 63 insertions(+) create mode 100644 xen/arch/arm/platforms/brcm-raspberry-pi.c
This is a series to enable UART console for Raspberry Pi 4. Note that I'm relying on the firmware to initialize the UART (i.e. enable_uart=1 in config.txt), since full UART initialization on this platform requires accessing some registers outside the range specified in the brcm,bcm2835-aux-uart node. I have been able to get Xen+dom0+domUs booting. Tested with Xen 4.12 and 4.13-unstable (b4c8a27d5b) and Linux 4.19.y (Raspberry Pi linux tree + a couple of patches). Please see [1] for build instructions and limitations. New in v2: * Drop early printk alias * Set reg-shift and reg-io-width in the Xen driver * Blacklist other aux peripherals in platform settings (spi1, spi2, and a couple of base aux registers) Thanks, Stewart Hildebrand DornerWorks, Ltd [1] https://github.com/dornerworks/xen-rpi4-builder Stewart Hildebrand (2): ns16550: Add compatible string for Raspberry Pi 4 xen/arm: platform: Add Raspberry Pi platform xen/arch/arm/platforms/Makefile | 1 + xen/arch/arm/platforms/brcm-raspberry-pi.c | 55 ++++++++++++++++++++++ xen/drivers/char/ns16550.c | 7 +++ 3 files changed, 63 insertions(+) create mode 100644 xen/arch/arm/platforms/brcm-raspberry-pi.c -- 2.22.0 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
Hi Stewart, On 29/07/2019 14:19, Stewart Hildebrand wrote: > This is a series to enable UART console for Raspberry Pi 4. Note that I'm relying on the firmware to initialize the UART (i.e. enable_uart=1 in config.txt), since full UART initialization on this platform requires accessing some registers outside the range specified in the brcm,bcm2835-aux-uart node. > > I have been able to get Xen+dom0+domUs booting. Tested with Xen 4.12 and 4.13-unstable (b4c8a27d5b) and Linux 4.19.y (Raspberry Pi linux tree + a couple of patches). Please see [1] for build instructions and limitations. > > New in v2: > * Drop early printk alias > * Set reg-shift and reg-io-width in the Xen driver > * Blacklist other aux peripherals in platform settings (spi1, spi2, and a couple of base aux registers) > > Thanks, > Stewart Hildebrand > DornerWorks, Ltd > > [1] https://github.com/dornerworks/xen-rpi4-builder > > Stewart Hildebrand (2): > ns16550: Add compatible string for Raspberry Pi 4 I have committed this patch... > xen/arm: platform: Add Raspberry Pi platform ... this one need an answer regarding the impact on blacklist spi1 and spi2. Cheers, -- Julien Grall _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
Hi, On 7/31/19 1:05 PM, Julien Grall wrote: > On 29/07/2019 14:19, Stewart Hildebrand wrote: >> This is a series to enable UART console for Raspberry Pi 4. Note that >> I'm relying on the firmware to initialize the UART (i.e. enable_uart=1 >> in config.txt), since full UART initialization on this platform >> requires accessing some registers outside the range specified in the >> brcm,bcm2835-aux-uart node. >> >> I have been able to get Xen+dom0+domUs booting. Tested with Xen 4.12 >> and 4.13-unstable (b4c8a27d5b) and Linux 4.19.y (Raspberry Pi linux >> tree + a couple of patches). Please see [1] for build instructions and >> limitations. >> >> New in v2: >> * Drop early printk alias >> * Set reg-shift and reg-io-width in the Xen driver >> * Blacklist other aux peripherals in platform settings (spi1, spi2, >> and a couple of base aux registers) >> >> Thanks, >> Stewart Hildebrand >> DornerWorks, Ltd >> >> [1] https://github.com/dornerworks/xen-rpi4-builder >> >> Stewart Hildebrand (2): >> ns16550: Add compatible string for Raspberry Pi 4 > > I have committed this patch... > >> xen/arm: platform: Add Raspberry Pi platform > ... this one need an answer regarding the impact on blacklist spi1 and > spi2. This patch is now merged as well. Thank you for adding support for the RPI4! Cheers, -- Julien Grall _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
On Mon, 29 Jul 2019 09:19:18 -0400
Stewart Hildebrand <stewart.hildebrand@dornerworks.com> wrote:
Hi,
> This is a series to enable UART console for Raspberry Pi 4. Note that I'm relying on the firmware to initialize the UART (i.e. enable_uart=1 in config.txt), since full UART initialization on this platform requires accessing some registers outside the range specified in the brcm,bcm2835-aux-uart node.
>
> I have been able to get Xen+dom0+domUs booting. Tested with Xen 4.12 and 4.13-unstable (b4c8a27d5b)
Mmmh, did that really work for you? I needed the next commit in staging as well:
commit ead6b9f78355e8d366e0c80c4a73fa7fbd6d26cc
Author: Andrii Anisov <andrii_anisov@epam.com>
Date: Thu Jul 18 16:22:20 2019 +0300
xen/arm: cpuerrata: Align a virtual address before unmap
Otherwise Xen would crash before even considering Dom0.
With Andrii's patch, your two patches and Stefano's resmem series I was able to at least run Xen till it was looking for Dom0, from U-Boot, with ATF (providing PSCI).
There seems to be some hiccup in the reserved-memory code in U-Boot, where U-Boot tries to use the already region, but that's an independent matter.
Cheers,
Andre.
> and Linux 4.19.y (Raspberry Pi linux tree + a couple of patches). Please see [1] for build instructions and limitations.
>
> New in v2:
> * Drop early printk alias
> * Set reg-shift and reg-io-width in the Xen driver
> * Blacklist other aux peripherals in platform settings (spi1, spi2, and a couple of base aux registers)
>
> Thanks,
> Stewart Hildebrand
> DornerWorks, Ltd
>
> [1] https://github.com/dornerworks/xen-rpi4-builder
>
> Stewart Hildebrand (2):
> ns16550: Add compatible string for Raspberry Pi 4
> xen/arm: platform: Add Raspberry Pi platform
>
> xen/arch/arm/platforms/Makefile | 1 +
> xen/arch/arm/platforms/brcm-raspberry-pi.c | 55 ++++++++++++++++++++++
> xen/drivers/char/ns16550.c | 7 +++
> 3 files changed, 63 insertions(+)
> create mode 100644 xen/arch/arm/platforms/brcm-raspberry-pi.c
>
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On Wednesday, July 31, 2019 8:32 AM, Andre Przywara <andre.przywara@arm.com> wrote: >On Mon, 29 Jul 2019 09:19:18 -0400 >Stewart Hildebrand <stewart.hildebrand@dornerworks.com> wrote: > >Hi, > >> This is a series to enable UART console for Raspberry Pi 4. Note that I'm relying on the firmware to initialize the UART (i.e. enable_uart=1 in config.txt), since full UART initialization on this platform requires accessing some registers outside the range specified in the brcm,bcm2835-aux-uart node. >> >> I have been able to get Xen+dom0+domUs booting. Tested with Xen 4.12 and 4.13-unstable (b4c8a27d5b) > >Mmmh, did that really work for you? I needed the next commit in staging as well: >commit ead6b9f78355e8d366e0c80c4a73fa7fbd6d26cc >Author: Andrii Anisov <andrii_anisov@epam.com> >Date: Thu Jul 18 16:22:20 2019 +0300 > > xen/arm: cpuerrata: Align a virtual address before unmap > >Otherwise Xen would crash before even considering Dom0. Hmm... Yes. I did not have Andrii's patch included in my tests. I tested in 4.13-unstable (b4c8a27d5b) and on 4.12 (604ee1116d3e), it booted into Xen+dom0. Now that I'm thinking about it, the domU test may have only been on 4.12, not on 4.13-unstable. >With Andrii's patch, your two patches and Stefano's resmem series I was able to at least run Xen till it was looking for Dom0, from U- >Boot, with ATF (providing PSCI). I'm not using ATF/U-Boot, and I've limited system RAM to total_mem=1024 in config.txt (even though I have the 4GB model) due to some DMA/driver issues (SD card, PCIe, etc) with the 64-bit RPi kernel. I also did not have Stefano's reserved-memory series applied in any test. The following logs are a from couple of test runs from 4.13-unstable on Sun Jul 28: (XEN) RAM: 0000000000000000 - 000000003b3fffff (XEN) (XEN) MODULE[0]: 000000002eff5f00 - 000000002effff49 Device Tree (XEN) MODULE[1]: 0000000000480000 - 0000000001400000 Kernel (XEN) RESVD[0]: 0000000000000000 - 0000000000001000 ... (XEN) Allocating 1:1 mappings totalling 512MB for dom0: (XEN) BANK[0] 0x00000010000000-0x00000028000000 (384MB) (XEN) BANK[1] 0x00000030000000-0x00000038000000 (128MB) Curiously, in another test with total_mem=1536, Xen happened to allocate memory for dom0 in a different way. I am noticing that the RPi firmware carved out a hole in RAM for me in this case. (XEN) RAM: 0000000000000000 - 000000003b3fffff (XEN) RAM: 0000000040000000 - 000000005fffffff (XEN) (XEN) MODULE[0]: 000000002eff5f00 - 000000002effff55 Device Tree (XEN) MODULE[1]: 0000000000480000 - 0000000001400000 Kernel (XEN) RESVD[0]: 0000000000000000 - 0000000000001000 ... (XEN) Allocating 1:1 mappings totalling 512MB for dom0: (XEN) BANK[0] 0x00000010000000-0x00000020000000 (256MB) (XEN) BANK[1] 0x00000040000000-0x00000050000000 (256MB) Stew >There seems to be some hiccup in the reserved-memory code in U-Boot, where U-Boot tries to use the already region, but that's an >independent matter. > >Cheers, >Andre. > >> and Linux 4.19.y (Raspberry Pi linux tree + a couple of patches). Please see [1] for build instructions and limitations. >> >> New in v2: >> * Drop early printk alias >> * Set reg-shift and reg-io-width in the Xen driver >> * Blacklist other aux peripherals in platform settings (spi1, spi2, and a couple of base aux registers) >> >> Thanks, >> Stewart Hildebrand >> DornerWorks, Ltd >> >> [1] https://github.com/dornerworks/xen-rpi4-builder >> >> Stewart Hildebrand (2): >> ns16550: Add compatible string for Raspberry Pi 4 >> xen/arm: platform: Add Raspberry Pi platform >> >> xen/arch/arm/platforms/Makefile | 1 + >> xen/arch/arm/platforms/brcm-raspberry-pi.c | 55 ++++++++++++++++++++++ >> xen/drivers/char/ns16550.c | 7 +++ >> 3 files changed, 63 insertions(+) >> create mode 100644 xen/arch/arm/platforms/brcm-raspberry-pi.c >> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
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