Re: [PATCH 08/12] x86: centralize setting SWIOTLB_FORCE when guest memory... | linuxppc-dev

cleanup swiotlb initialization v4 · Christoph Hellwig <hch@lst.de> · 2022-03-01
[PATCH 01/12] dma-direct: use is_swiotlb_active in dma_direct_map_page · Christoph Hellwig <hch@lst.de> · 2022-03-01
[PATCH 02/12] swiotlb: make swiotlb_exit a no-op if SWIOTLB_FORCE is set · Christoph Hellwig <hch@lst.de> · 2022-03-01
[PATCH 03/12] swiotlb: simplify swiotlb_max_segment · Christoph Hellwig <hch@lst.de> · 2022-03-01
[PATCH 04/12] swiotlb: rename swiotlb_late_init_with_default_size · Christoph Hellwig <hch@lst.de> · 2022-03-01
[PATCH 05/12] swiotlb: pass a gfp_mask argument to swiotlb_init_late · Christoph Hellwig <hch@lst.de> · 2022-03-01
[PATCH 06/12] MIPS/octeon: use swiotlb_init instead of open coding it · Christoph Hellwig <hch@lst.de> · 2022-03-01
Re: [PATCH 06/12] MIPS/octeon: use swiotlb_init instead of open coding it · Thomas Bogendoerfer <tsbogend@alpha.franken.de> · 2022-03-03
[PATCH 07/12] x86: remove the IOMMU table infrastructure · Christoph Hellwig <hch@lst.de> · 2022-03-01
[PATCH 08/12] x86: centralize setting SWIOTLB_FORCE when guest memory encryption is enabled · Christoph Hellwig <hch@lst.de> · 2022-03-01
Re: [PATCH 08/12] x86: centralize setting SWIOTLB_FORCE when guest memory encryption is enabled · Andrew Cooper <hidden> · 2022-03-01
Re: [PATCH 08/12] x86: centralize setting SWIOTLB_FORCE when guest memory encryption is enabled · Christoph Hellwig <hch@lst.de> · 2022-03-01
[PATCH 09/12] swiotlb: make the swiotlb_init interface more useful · Christoph Hellwig <hch@lst.de> · 2022-03-01
[PATCH 10/12] swiotlb: add a SWIOTLB_ANY flag to lift the low memory restriction · Christoph Hellwig <hch@lst.de> · 2022-03-01
RE: [PATCH 10/12] swiotlb: add a SWIOTLB_ANY flag to lift the low memory restriction · Michael Kelley (LINUX) <hidden> · 2022-03-04
Re: [PATCH 10/12] swiotlb: add a SWIOTLB_ANY flag to lift the low memory restriction · Dongli Zhang <hidden> · 2022-03-04
RE: [PATCH 10/12] swiotlb: add a SWIOTLB_ANY flag to lift the low memory restriction · Michael Kelley (LINUX) <hidden> · 2022-03-06
[PATCH 11/12] swiotlb: merge swiotlb-xen initialization into swiotlb · Christoph Hellwig <hch@lst.de> · 2022-03-01
Re: [PATCH 11/12] swiotlb: merge swiotlb-xen initialization into swiotlb · Stefano Stabellini <sstabellini@kernel.org> · 2022-03-02
Re: [PATCH 11/12] swiotlb: merge swiotlb-xen initialization into swiotlb · Christoph Hellwig <hch@lst.de> · 2022-03-02
Re: [PATCH 11/12] swiotlb: merge swiotlb-xen initialization into swiotlb · Stefano Stabellini <sstabellini@kernel.org> · 2022-03-03
Re: [PATCH 11/12] swiotlb: merge swiotlb-xen initialization into swiotlb · Christoph Hellwig <hch@lst.de> · 2022-03-03
Re: [PATCH 11/12] swiotlb: merge swiotlb-xen initialization into swiotlb · Stefano Stabellini <sstabellini@kernel.org> · 2022-03-03
Re: [PATCH 11/12] swiotlb: merge swiotlb-xen initialization into swiotlb · Christoph Hellwig <hch@lst.de> · 2022-03-04
Re: [PATCH 11/12] swiotlb: merge swiotlb-xen initialization into swiotlb · Stefano Stabellini <sstabellini@kernel.org> · 2022-03-04
Re: [PATCH 11/12] swiotlb: merge swiotlb-xen initialization into swiotlb · Boris Ostrovsky <boris.ostrovsky@oracle.com> · 2022-03-02
Re: [PATCH 11/12] swiotlb: merge swiotlb-xen initialization into swiotlb · Boris Ostrovsky <boris.ostrovsky@oracle.com> · 2022-03-02
Re: [PATCH 11/12] swiotlb: merge swiotlb-xen initialization into swiotlb · Christoph Hellwig <hch@lst.de> · 2022-03-03
Re: [PATCH 11/12] swiotlb: merge swiotlb-xen initialization into swiotlb · Boris Ostrovsky <boris.ostrovsky@oracle.com> · 2022-03-03
Re: [PATCH 11/12] swiotlb: merge swiotlb-xen initialization into swiotlb · Christoph Hellwig <hch@lst.de> · 2022-03-04
Re: [PATCH 11/12] swiotlb: merge swiotlb-xen initialization into swiotlb · Boris Ostrovsky <boris.ostrovsky@oracle.com> · 2022-03-04
Re: [PATCH 11/12] swiotlb: merge swiotlb-xen initialization into swiotlb · Christoph Hellwig <hch@lst.de> · 2022-03-04
Re: [PATCH 11/12] swiotlb: merge swiotlb-xen initialization into swiotlb · Boris Ostrovsky <boris.ostrovsky@oracle.com> · 2022-03-04
Re: [PATCH 11/12] swiotlb: merge swiotlb-xen initialization into swiotlb · Christoph Hellwig <hch@lst.de> · 2022-03-04
Re: [PATCH 11/12] swiotlb: merge swiotlb-xen initialization into swiotlb · Boris Ostrovsky <boris.ostrovsky@oracle.com> · 2022-03-08
Re: [PATCH 11/12] swiotlb: merge swiotlb-xen initialization into swiotlb · Christoph Hellwig <hch@lst.de> · 2022-03-09
Re: [PATCH 11/12] swiotlb: merge swiotlb-xen initialization into swiotlb · Boris Ostrovsky <boris.ostrovsky@oracle.com> · 2022-03-09
[PATCH 12/12] x86: remove cruft from <asm/dma-mapping.h> · Christoph Hellwig <hch@lst.de> · 2022-03-01

Re: [PATCH 08/12] x86: centralize setting SWIOTLB_FORCE when guest memory encryption is enabled

From: Christoph Hellwig <hch@lst.de>
Date: 2022-03-01 11:44:41
Also in: linux-arm-kernel, linux-hyperv, linux-iommu, linux-mips, linux-pci, linux-riscv, linux-s390, xen-devel

On Tue, Mar 01, 2022 at 11:39:29AM +0000, Andrew Cooper wrote:

This isn't really "must".  The guest is perfectly capable of sharing
memory with the hypervisor.

It's just that for now, bounce buffering is allegedly faster, and the
simple way of getting it working.

Yeah, I guess you щould just share/unshare on demand.  But given that
this isn't implemented it is a must in the current kernel.  But if
you want a different wording suggest one and I'll put it in.

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