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RE: [PATCH 07/10] iommu/ipmmu-vmsa: Add Renesas R8A779F0 (R-Car S4) support
- To: Oleksandr Tyshchenko <olekstysh@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
- Date: Tue, 14 Dec 2021 12:10:19 +0000
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- Cc: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Paul Durrant <paul@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>
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- Thread-topic: [PATCH 07/10] iommu/ipmmu-vmsa: Add Renesas R8A779F0 (R-Car S4) support
Hello Oleksandr-san,
Thank you for the patch!
> From: Oleksandr Tyshchenko, Sent: Sunday, November 28, 2021 2:52 AM
>
> From: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
>
> Based on the following commit from the Renesas BSP:
> 7003b9f732cffdc778fceb4bffb05ebb4540f726
> located at:
> https://github.com/renesas-rcar/linux-bsp/tree/v5.10.41/rcar-5.1.3.rc5
I would like to reuse an upstream-based patch instead of this BSP patch.
Linux upstream doesn't support the IPMMU-VMSA driver for R-Car S4 yet,
but I believe the following patch can be helpful for R-Car S4:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/iommu/ipmmu-vmsa.c?h=v5.16-rc1&id=7a62ced8ebd0e1b692c9dc4781a8d4ddb0f74792
I have a plan to modify the Linux IPMMU-VMSA driver for R-Car S4 in the future.
- The ipmmu_features_r8a779a0 is replaced with ipmmu_features_rcar_gen4.
I'll review further patches (8/10 through 10/10) tomorrow or later.
Best regards,
Yoshihiro Shimoda
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