From: Gerd Hoffmann <kraxel@redhat.com>
To: Muli Ben-Yehuda <muli@il.ibm.com>
Cc: Amit Shah <amit.shah@qumranet.com>,
kvm-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org
Subject: Re: [kvm-devel] [PATCH 3/8] KVM: PVDMA Guest: Guest-side routines for paravirtualized DMA
Date: Mon, 12 Nov 2007 15:53:59 +0100 [thread overview]
Message-ID: <47386907.5080101@redhat.com> (raw)
In-Reply-To: <20071112105001.GF3299@rhun.haifa.ibm.com>
Muli Ben-Yehuda wrote:
> On Wed, Nov 07, 2007 at 04:21:04PM +0200, Amit Shah wrote:
>
>> We make the dma_mapping_ops structure to point to our structure so
>> that every DMA access goes through us. (This is the reason this only
>> works for 64-bit guest. 32-bit guest doesn't yet have a dma_ops
>> struct.)
>
> I need the same facility for Calgary for falling back to swiotlb if a
> translation is disabled on some slot, and IB needs the same facility
> for some IB adapters (e.g., ipath). Perhaps it's time to consider
> stackable dma-ops (unless someone has a better idea...).
Hmm, at least the later sounds like for per-device dma_ops would be more
useful that stackable ones, as each stack instance just checks "should I
do something for device $foo, if not, call the next one ...".
cheers,
Gerd
next prev parent reply other threads:[~2007-11-12 14:54 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-07 14:21 RFC: Paravirtualized DMA accesses for KVM Amit Shah
[not found] ` <d1c72ce6e3a0e73c18993c3f066d1350b147f726.1194445109.git.amit.shah@qumranet.com>
2007-11-07 14:21 ` [PATCH 1/8] KVM: PVDMA Host: Handle reqeusts for guest DMA mappings Amit Shah
[not found] ` <6d486436cf50e269d8914229d10ff60f3d646795.1194445109.git.amit.shah@qumranet.com>
2007-11-07 14:21 ` [PATCH 2/8] KVM: Move #include asm/kvm_para.h outside of __KERNEL__ Amit Shah
[not found] ` <609d5d611a5fb58ab5a7184be7b6d29494023ba0.1194445109.git.amit.shah@qumranet.com>
2007-11-07 14:21 ` [PATCH 3/8] KVM: PVDMA Guest: Guest-side routines for paravirtualized DMA Amit Shah
2007-11-12 10:50 ` [kvm-devel] " Muli Ben-Yehuda
2007-11-12 11:56 ` Amit Shah
2007-11-12 13:32 ` Muli Ben-Yehuda
2007-11-12 13:55 ` Amit Shah
2007-11-12 14:01 ` Muli Ben-Yehuda
2007-11-12 14:53 ` Gerd Hoffmann [this message]
2007-11-12 16:00 ` Joerg Roedel
[not found] ` <218cf425feff1d4daf23d3f25df1eb224108a1a3.1194445109.git.amit.shah@qumranet.com>
2007-11-07 14:21 ` [PATCH 4/8] KVM: PVDMA: Introduce is_pv_device() dma operation Amit Shah
2007-11-12 10:52 ` [kvm-devel] " Muli Ben-Yehuda
[not found] ` <6bbd61409e4779febab1eaf03796455b22e8ea70.1194445109.git.amit.shah@qumranet.com>
2007-11-07 14:21 ` [PATCH 6/8] KVM: PVDMA Guest: Add Makefile rule Amit Shah
[not found] ` <01dd7657bda537d738ea92330606592fa8aaf3c5.1194445109.git.amit.shah@qumranet.com>
2007-11-07 14:21 ` [PATCH 7/8] PVDMA: Guest: Add Kconfig options to select PVDMA Amit Shah
[not found] ` <fbc5dea9bfdb021ab2d3808583314901799405a0.1194445109.git.amit.shah@qumranet.com>
2007-11-07 14:21 ` [PATCH 8/8] KVM: Update drivers/Makefile to check for CONFIG_VIRTUALIZATION Amit Shah
[not found] ` <e2f5f0c08d08cf66a39c8b452410078617e611f7.1194445109.git.amit.shah@qumranet.com>
2007-11-07 14:21 ` [PATCH 5/8] KVM: PVDMA: Update dma_alloc_coherent to make it paravirt-aware Amit Shah
2007-11-12 10:56 ` [kvm-devel] " Muli Ben-Yehuda
2007-11-12 11:59 ` Amit Shah
2007-11-12 15:55 ` [kvm-devel] [PATCH 1/8] KVM: PVDMA Host: Handle reqeusts for guest DMA mappings Joerg Roedel
2007-11-12 17:07 ` Amit Shah
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