From: Christoph Hellwig <hch@lst.de>
To: Tianyu Lan <ltykernel@gmail.com>
Cc: linux-hyperv@vger.kernel.org, brijesh.singh@amd.com,
dave.hansen@linux.intel.com, hpa@zytor.com, kys@microsoft.com,
Christoph Hellwig <hch@lst.de>,
hch@infradead.org, wei.liu@kernel.org, sthemmin@microsoft.com,
x86@kernel.org, decui@microsoft.com,
michael.h.kelley@microsoft.com, mingo@redhat.com,
parri.andrea@gmail.com, thomas.lendacky@amd.com,
Tianyu Lan <Tianyu.Lan@microsoft.com>,
konrad.wilk@oracle.com, haiyangz@microsoft.com, bp@alien8.de,
tglx@linutronix.de, linux-kernel@vger.kernel.org,
iommu@lists.linux-foundation.org, vkuznets@redhat.com,
robin.murphy@arm.com
Subject: Re: [PATCH V2 1/2] Swiotlb: Add swiotlb_alloc_from_low_pages switch
Date: Tue, 22 Feb 2022 17:00:39 +0100 [thread overview]
Message-ID: <20220222160039.GA13380@lst.de> (raw)
In-Reply-To: <00112505-4999-ac41-877e-49c4cc45312e@gmail.com>
On Tue, Feb 22, 2022 at 11:07:19PM +0800, Tianyu Lan wrote:
> Thanks for your comment. That means we need to expose an
> swiotlb_device_init() interface to allocate bounce buffer and initialize
> io tlb mem entry. DMA API Current rmem_swiotlb_device_init() only works
> for platform with device tree. The new API should be called in the bus
> driver or new DMA API. Could you check whether this is a right way before
> we start the work.
Do these VMs use ACPI? We'd probably really want some kind of higher
level configuration and not have the drivers request it themselves.
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next prev parent reply other threads:[~2022-02-22 16:00 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-09 12:23 [PATCH V2 0/2] x86/hyperv/Swiotlb: Add swiotlb_set_alloc_from_low_pages() switch function Tianyu Lan
2022-02-09 12:23 ` [PATCH V2 1/2] Swiotlb: Add swiotlb_alloc_from_low_pages switch Tianyu Lan
2022-02-14 8:19 ` Christoph Hellwig
2022-02-14 11:28 ` Tianyu Lan
2022-02-14 13:58 ` Christoph Hellwig
2022-02-15 15:32 ` Tianyu Lan
2022-02-21 15:14 ` Tianyu Lan
2022-02-22 8:05 ` Christoph Hellwig
2022-02-22 15:07 ` Tianyu Lan
2022-02-22 16:00 ` Christoph Hellwig [this message]
2022-02-23 9:46 ` Tianyu Lan
2022-02-25 14:28 ` Tianyu Lan
2022-03-01 11:53 ` Christoph Hellwig
2022-03-01 14:01 ` Tianyu Lan
2022-02-09 12:23 ` [PATCH V2 2/2] x86/hyperv: Make swiotlb bounce buffer allocation not just from low pages Tianyu Lan
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