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.
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Tianyu Lan <ltykernel@gmail.com>
Cc: parri.andrea@gmail.com, linux-hyperv@vger.kernel.org,
brijesh.singh@amd.com, peterz@infradead.org,
catalin.marinas@arm.com, dave.hansen@linux.intel.com,
dave.hansen@intel.com, netdev@vger.kernel.org, hpa@zytor.com,
kys@microsoft.com, will@kernel.org, tglx@linutronix.de,
linux-arch@vger.kernel.org, wei.liu@kernel.org,
sstabellini@kernel.org, sthemmin@microsoft.com,
xen-devel@lists.xenproject.org, linux-scsi@vger.kernel.org,
aneesh.kumar@linux.ibm.com, x86@kernel.org, decui@microsoft.com,
Christoph Hellwig <hch@lst.de>,
michael.h.kelley@microsoft.com, mingo@redhat.com,
pgonda@google.com, rientjes@google.com, kuba@kernel.org,
jejb@linux.ibm.com, martin.b.radev@gmail.com,
thomas.lendacky@amd.com, Tianyu.Lan@microsoft.com, arnd@arndb.de,
konrad.wilk@oracle.com, haiyangz@microsoft.com, bp@alien8.de,
luto@kernel.org, krish.sadhukhan@oracle.com,
boris.ostrovsky@oracle.com, vkuznets@redhat.com,
linux-arm-kernel@lists.infradead.org, jgross@suse.com,
martin.petersen@oracle.com, saravanand@fb.com,
gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org,
iommu@lists.linux-foundation.org, rppt@kernel.org,
hannes@cmpxchg.org, ardb@kernel.org, akpm@linux-foundation.org,
robin.murphy@arm.com, davem@davemloft.net,
kirill.shutemov@linux.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.
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iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2021-09-02 7:51 UTC|newest]
Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-27 17:20 [PATCH V4 00/13] x86/Hyper-V: Add Hyper-V Isolation VM support Tianyu Lan
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
2021-08-27 17:20 ` Tianyu Lan
2021-09-02 0:15 ` Michael Kelley
2021-09-02 0:15 ` Michael Kelley via iommu
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
2021-08-27 17:21 ` Tianyu Lan
2021-09-02 0:15 ` Michael Kelley
2021-09-02 0:15 ` Michael Kelley
2021-09-02 0:15 ` Michael Kelley via iommu
2021-09-02 6:35 ` Tianyu Lan
2021-09-02 6:35 ` Tianyu Lan
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
2021-08-27 17:21 ` Tianyu Lan
2021-09-02 0:16 ` Michael Kelley
2021-09-02 0:16 ` Michael Kelley
2021-09-02 0:16 ` Michael Kelley via iommu
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 17:21 ` Tianyu Lan
2021-08-27 17:41 ` Greg KH
2021-08-27 17:41 ` Greg KH
2021-08-27 17:44 ` Tianyu Lan
2021-08-27 17:44 ` Tianyu Lan
2021-09-02 0:17 ` Michael Kelley
2021-09-02 0:17 ` Michael Kelley
2021-09-02 0:17 ` Michael Kelley via iommu
2021-08-27 17:21 ` [PATCH V4 05/13] hyperv: Add Write/Read MSR registers via ghcb page Tianyu Lan
2021-08-27 17:21 ` Tianyu Lan
2021-08-27 17:41 ` Greg KH
2021-08-27 17:41 ` Greg KH
2021-08-27 17:46 ` Tianyu Lan
2021-08-27 17:46 ` Tianyu Lan
2021-09-02 3:32 ` Michael Kelley
2021-09-02 3:32 ` Michael Kelley
2021-09-02 3:32 ` Michael Kelley via iommu
2021-08-27 17:21 ` [PATCH V4 06/13] hyperv: Add ghcb hvcall support for SNP VM Tianyu Lan
2021-08-27 17:21 ` Tianyu Lan
2021-09-02 0:20 ` Michael Kelley
2021-09-02 0:20 ` Michael Kelley
2021-09-02 0:20 ` Michael Kelley via iommu
2021-08-27 17:21 ` [PATCH V4 07/13] hyperv/Vmbus: Add SNP support for VMbus channel initiate message Tianyu Lan
2021-08-27 17:21 ` Tianyu Lan
2021-09-02 0:21 ` Michael Kelley
2021-09-02 0:21 ` Michael Kelley
2021-09-02 0:21 ` Michael Kelley via iommu
2021-08-27 17:21 ` [PATCH V4 08/13] hyperv/vmbus: Initialize VMbus ring buffer for Isolation VM Tianyu Lan
2021-08-27 17:21 ` Tianyu Lan
2021-09-02 0:23 ` Michael Kelley
2021-09-02 0:23 ` Michael Kelley
2021-09-02 0:23 ` Michael Kelley via iommu
2021-09-02 13:35 ` Tianyu Lan
2021-09-02 13:35 ` Tianyu Lan
2021-09-02 13:35 ` Tianyu Lan
2021-09-02 16:14 ` Michael Kelley
2021-09-02 16:14 ` Michael Kelley via iommu
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 ` 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 ` Tianyu Lan
2021-08-27 17:21 ` [PATCH V4 11/13] hyperv/IOMMU: Enable swiotlb bounce buffer for Isolation VM Tianyu Lan
2021-08-27 17:21 ` Tianyu Lan
2021-09-02 1:27 ` Michael Kelley
2021-09-02 1:27 ` Michael Kelley
2021-09-02 1:27 ` Michael Kelley via iommu
2021-08-27 17:21 ` [PATCH V4 12/13] hv_netvsc: Add Isolation VM support for netvsc driver Tianyu Lan
2021-08-27 17:21 ` Tianyu Lan
2021-09-02 2:34 ` Michael Kelley
2021-09-02 2:34 ` Michael Kelley
2021-09-02 2:34 ` Michael Kelley via iommu
2021-09-02 4:56 ` Michael Kelley
2021-09-02 4:56 ` Michael Kelley
2021-09-02 4:56 ` Michael Kelley via iommu
2021-08-27 17:21 ` [PATCH V4 13/13] hv_storvsc: Add Isolation VM support for storvsc driver Tianyu Lan
2021-08-27 17:21 ` Tianyu Lan
2021-09-02 2:08 ` Michael Kelley
2021-09-02 2:08 ` Michael Kelley
2021-09-02 2:08 ` Michael Kelley via iommu
2021-08-30 12:00 ` [PATCH V4 00/13] x86/Hyper-V: Add Hyper-V Isolation VM support Christoph Hellwig
2021-08-30 12:00 ` Christoph Hellwig
2021-08-31 15:20 ` Tianyu Lan
2021-08-31 15:20 ` Tianyu Lan
2021-09-02 7:51 ` Christoph Hellwig [this message]
2021-09-02 7:51 ` Christoph Hellwig
2021-08-31 17:16 ` Michael Kelley
2021-08-31 17:16 ` Michael Kelley
2021-08-31 17:16 ` Michael Kelley via iommu
2021-09-02 7:59 ` Christoph Hellwig
2021-09-02 7:59 ` Christoph Hellwig
2021-09-02 7:59 ` Christoph Hellwig
2021-09-02 11:21 ` Tianyu Lan
2021-09-02 11:21 ` Tianyu Lan
2021-09-02 11:21 ` Tianyu Lan
2021-09-02 15:57 ` Michael Kelley
2021-09-02 15:57 ` Michael Kelley
2021-09-02 15:57 ` Michael Kelley via iommu
2021-09-14 14:41 ` Tianyu Lan
2021-09-14 14:41 ` Tianyu Lan
2021-09-14 14:41 ` Tianyu Lan
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