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Re: [PATCH 2/3] x86: always initialize xen-swiotlb when xen-pcifront is enabling

To: Christoph Hellwig <hch@xxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, x86@xxxxxxxxxx, "H. Peter Anvin" <hpa@xxxxxxxxx>
From: Juergen Gross <jgross@xxxxxxxx>
Date: Tue, 27 Jun 2023 09:19:18 +0200
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, iommu@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
Delivery-date: Tue, 27 Jun 2023 07:19:27 +0000
List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 12.06.23 16:25, Christoph Hellwig wrote:

Remove the dangerous late initialization of xen-swiotlb in
pci_xen_swiotlb_init_late and instead just always initialize
xen-swiotlb in the boot code if CONFIG_XEN_PCIDEV_FRONTEND is
enabled and Xen PV PCI is possible.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>


Reviewed-by: Juergen Gross <jgross@xxxxxxxx>


Juergen

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References:
- unexport swiotlb_active v2
  - From: Christoph Hellwig
- [PATCH 2/3] x86: always initialize xen-swiotlb when xen-pcifront is enabling
  - From: Christoph Hellwig

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