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From: Christoph Hellwig <hch@lst.de>
To: Tianyu Lan <ltykernel@gmail.com>
Cc: Christoph Hellwig <hch@lst.de>,
	kys@microsoft.com, haiyangz@microsoft.com,
	sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com,
	catalin.marinas@arm.com, will@kernel.org, tglx@linutronix.de,
	mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com,
	dave.hansen@linux.intel.com, luto@kernel.org,
	peterz@infradead.org, konrad.wilk@oracle.com,
	boris.ostrovsky@oracle.com, jgross@suse.com,
	sstabellini@kernel.org, joro@8bytes.org, davem@davemloft.net,
	kuba@kernel.org, jejb@linux.ibm.com, martin.petersen@oracle.com,
	gregkh@linuxfoundation.org, arnd@arndb.de,
	m.szyprowski@samsung.com, robin.murphy@arm.com,
	brijesh.singh@amd.com, thomas.lendacky@amd.com,
	Tianyu.Lan@microsoft.com, pgonda@google.com,
	martin.b.radev@gmail.com, akpm@linux-foundation.org,
	kirill.shutemov@linux.intel.com, rppt@kernel.org,
	hannes@cmpxchg.org, aneesh.kumar@linux.ibm.com,
	krish.sadhukhan@oracle.com, saravanand@fb.com,
	linux-arm-kernel@lists.infradead.org,
	xen-devel@lists.xenproject.org, rientjes@google.com,
	ardb@kernel.org, michael.h.kelley@microsoft.com,
	iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org,
	linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-scsi@vger.kernel.org, netdev@vger.kernel.org,
	vkuznets@redhat.com, parri.andrea@gmail.com,
	dave.hansen@intel.com
Subject: Re: [PATCH V4 00/13] x86/Hyper-V: Add Hyper-V Isolation VM support
Date: Thu, 2 Sep 2021 09:51:31 +0200	[thread overview]
Message-ID: <20210902075131.GA14986@lst.de> (raw)
In-Reply-To: <91b5e997-8d44-77f0-6519-f574b541ba9f@gmail.com>

On Tue, Aug 31, 2021 at 11:20:06PM +0800, Tianyu Lan wrote:
>> If so I suspect the best way to allocate them is by not using vmalloc
>> but just discontiguous pages, and then use kmap_local_pfn where the
>> PFN includes the share_gpa offset when actually copying from/to the
>> skbs.
>>
> When netvsc needs to copy packet data to send buffer, it needs to caculate 
> position with section_index and send_section_size.
> Please seee netvsc_copy_to_send_buf() detail. So the contiguous virtual 
> address of send buffer is necessary to copy data and batch packets.

Actually that makes the kmap approach much easier.  The phys_to_virt
can just be replaced with a kmap_local_pfn and the unmap needs to
be added.  I've been mostly focussing on the receive path, which
would need a similar treatment.

  reply	other threads:[~2021-09-02  7:51 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-27 17:20 Tianyu Lan
2021-08-27 17:20 ` [PATCH V4 01/13] x86/hyperv: Initialize GHCB page in Isolation VM Tianyu Lan
2021-09-02  0:15   ` Michael Kelley
2021-08-27 17:21 ` [PATCH V4 02/13] x86/hyperv: Initialize shared memory boundary in the " Tianyu Lan
2021-09-02  0:15   ` Michael Kelley
2021-09-02  6:35     ` Tianyu Lan
2021-08-27 17:21 ` [PATCH V4 03/13] x86/hyperv: Add new hvcall guest address host visibility support Tianyu Lan
2021-09-02  0:16   ` Michael Kelley
2021-08-27 17:21 ` [PATCH V4 04/13] hyperv: Mark vmbus ring buffer visible to host in Isolation VM Tianyu Lan
2021-08-27 17:41   ` Greg KH
2021-08-27 17:44     ` Tianyu Lan
2021-09-02  0:17   ` Michael Kelley
2021-08-27 17:21 ` [PATCH V4 05/13] hyperv: Add Write/Read MSR registers via ghcb page Tianyu Lan
2021-08-27 17:41   ` Greg KH
2021-08-27 17:46     ` Tianyu Lan
2021-09-02  3:32   ` Michael Kelley
2021-08-27 17:21 ` [PATCH V4 06/13] hyperv: Add ghcb hvcall support for SNP VM Tianyu Lan
2021-09-02  0:20   ` Michael Kelley
2021-08-27 17:21 ` [PATCH V4 07/13] hyperv/Vmbus: Add SNP support for VMbus channel initiate message Tianyu Lan
2021-09-02  0:21   ` Michael Kelley
2021-08-27 17:21 ` [PATCH V4 08/13] hyperv/vmbus: Initialize VMbus ring buffer for Isolation VM Tianyu Lan
2021-09-02  0:23   ` Michael Kelley
2021-09-02 13:35     ` Tianyu Lan
2021-09-02 16:14       ` Michael Kelley
2021-08-27 17:21 ` [PATCH V4 09/13] DMA: Add dma_map_decrypted/dma_unmap_encrypted() function Tianyu Lan
2021-08-27 17:21 ` [PATCH V4 10/13] x86/Swiotlb: Add Swiotlb bounce buffer remap function for HV IVM Tianyu Lan
2021-08-27 17:21 ` [PATCH V4 11/13] hyperv/IOMMU: Enable swiotlb bounce buffer for Isolation VM Tianyu Lan
2021-09-02  1:27   ` Michael Kelley
2021-08-27 17:21 ` [PATCH V4 12/13] hv_netvsc: Add Isolation VM support for netvsc driver Tianyu Lan
2021-09-02  2:34   ` Michael Kelley
2021-09-02  4:56     ` Michael Kelley
2021-08-27 17:21 ` [PATCH V4 13/13] hv_storvsc: Add Isolation VM support for storvsc driver Tianyu Lan
2021-09-02  2:08   ` Michael Kelley
2021-08-30 12:00 ` [PATCH V4 00/13] x86/Hyper-V: Add Hyper-V Isolation VM support Christoph Hellwig
2021-08-31 15:20   ` Tianyu Lan
2021-09-02  7:51     ` Christoph Hellwig [this message]
2021-08-31 17:16   ` Michael Kelley
2021-09-02  7:59     ` Christoph Hellwig
2021-09-02 11:21       ` Tianyu Lan
2021-09-02 15:57       ` Michael Kelley
2021-09-14 14:41         ` Tianyu Lan

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