From: Jason Gunthorpe <jgg@nvidia.com>
To: Donald Dutile <ddutile@redhat.com>
Cc: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>,
Nicolin Chen <nicolinc@nvidia.com>,
Eric Auger <eric.auger@redhat.com>,
"qemu-arm@nongnu.org" <qemu-arm@nongnu.org>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"peter.maydell@linaro.org" <peter.maydell@linaro.org>,
Linuxarm <linuxarm@huawei.com>,
"Wangzhou (B)" <wangzhou1@hisilicon.com>,
jiangkunkun <jiangkunkun@huawei.com>,
Jonathan Cameron <jonathan.cameron@huawei.com>,
"zhangfei.gao@linaro.org" <zhangfei.gao@linaro.org>
Subject: Re: [RFC PATCH 2/5] hw/arm/smmuv3: Add initial support for SMMUv3 Nested device
Date: Thu, 28 Nov 2024 08:51:05 -0400 [thread overview]
Message-ID: <20241128125105.GB1253388@nvidia.com> (raw)
In-Reply-To: <9a62fa8d-a7a0-4bc1-bccb-2fcfaa119d65@redhat.com>
On Wed, Nov 27, 2024 at 06:03:23PM -0500, Donald Dutile wrote:
> The association would be done via the VMM -- no different then what associates
> an assigned device to a VM today -- no hw-level (VM-)ID needed; a matter of exposing
> it to the VM, or not; or mapping the (virtual) CMDQ to the mapped/associated ECMDQ.
> They are purposedly mapped 64K apart from each other, enabling page-level protection,
> which I doubt is a per-CPU req for lock contention avoidance (large-cache-block
> spaced would be sufficient, even 4k; it's 64k spaced btwn ECMDQ regs .. the largest
> ARM page size.
There are commands a VM could stuff on the ECMQ that would harm the
hypervisor. Without VMID isolation you can't use ECMDQ like this
today.
Jason
next prev parent reply other threads:[~2024-11-28 12:51 UTC|newest]
Thread overview: 189+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-11-08 12:52 [RFC PATCH 0/5] hw/arm/virt: Add support for user-creatable nested SMMUv3 Shameer Kolothum via
2024-11-08 12:52 ` Shameer Kolothum via
2024-11-08 12:52 ` [RFC PATCH 1/5] hw/arm/virt: Add an SMMU_IO_LEN macro Shameer Kolothum via
2024-11-08 12:52 ` Shameer Kolothum via
2024-11-13 16:48 ` Eric Auger
2024-11-08 12:52 ` [RFC PATCH 2/5] hw/arm/smmuv3: Add initial support for SMMUv3 Nested device Shameer Kolothum via
2024-11-08 12:52 ` Shameer Kolothum via
2024-11-13 17:12 ` Eric Auger
2024-11-13 18:05 ` Nicolin Chen
2024-11-26 18:28 ` Donald Dutile
2024-11-27 10:21 ` Shameerali Kolothum Thodi via
2024-11-27 10:21 ` Shameerali Kolothum Thodi via
2024-11-27 16:00 ` Jason Gunthorpe
2024-11-27 16:05 ` Eric Auger
2024-11-28 3:25 ` Zhangfei Gao
2024-11-28 8:06 ` Eric Auger
2024-11-28 8:28 ` Shameerali Kolothum Thodi via
2024-11-28 8:28 ` Shameerali Kolothum Thodi via
2024-11-28 8:41 ` Eric Auger
2024-11-28 12:52 ` Jason Gunthorpe
2024-11-27 23:03 ` Donald Dutile
2024-11-28 12:51 ` Jason Gunthorpe [this message]
2024-11-28 4:29 ` Donald Dutile
2024-11-28 4:44 ` Nicolin Chen
2024-11-28 12:54 ` Jason Gunthorpe
2024-11-28 18:22 ` Nicolin Chen
2024-12-02 18:53 ` Donald Dutile
2024-11-28 8:17 ` Shameerali Kolothum Thodi via
2024-11-28 8:17 ` Shameerali Kolothum Thodi via
2024-11-14 8:20 ` Shameerali Kolothum Thodi via
2024-11-14 8:20 ` Shameerali Kolothum Thodi via
2024-11-14 8:41 ` Eric Auger
2024-11-14 13:27 ` Shameerali Kolothum Thodi via
2024-11-15 22:32 ` Nicolin Chen
2024-11-13 18:00 ` Eric Auger
2024-11-08 12:52 ` [RFC PATCH 3/5] hw/arm/smmuv3: Associate a pci bus with a " Shameer Kolothum via
2024-11-13 17:58 ` Eric Auger
2024-11-14 8:30 ` Shameerali Kolothum Thodi via
2024-11-14 8:30 ` Shameerali Kolothum Thodi via
2025-01-30 16:29 ` Daniel P. Berrangé
2025-01-30 18:19 ` Shameerali Kolothum Thodi via
2025-01-30 18:19 ` Shameerali Kolothum Thodi via
2024-11-08 12:52 ` [RFC PATCH 4/5] hw/arm/virt-acpi-build: Build IORT with multiple SMMU nodes Shameer Kolothum via
2024-11-18 10:01 ` Eric Auger
2024-11-18 11:44 ` Shameerali Kolothum Thodi via
2024-11-18 11:44 ` Shameerali Kolothum Thodi via
2024-11-18 13:45 ` Eric Auger
2024-11-18 15:00 ` Shameerali Kolothum Thodi via
2024-11-18 15:00 ` Shameerali Kolothum Thodi via
2024-11-18 18:09 ` Eric Auger
2024-11-20 14:16 ` Shameerali Kolothum Thodi via
2024-11-20 14:16 ` Shameerali Kolothum Thodi via
2024-11-20 16:10 ` Eric Auger
2024-11-20 16:26 ` Shameerali Kolothum Thodi via
2024-11-20 16:26 ` Shameerali Kolothum Thodi via
2024-11-21 9:46 ` Shameerali Kolothum Thodi via
2024-11-21 9:46 ` Shameerali Kolothum Thodi via
2024-12-10 20:48 ` Nicolin Chen
2024-12-11 15:21 ` Shameerali Kolothum Thodi via
2024-12-11 15:21 ` Shameerali Kolothum Thodi via
2024-12-13 0:28 ` Nicolin Chen
2024-11-08 12:52 ` [RFC PATCH 5/5] hw/arm/virt-acpi-build: Add IORT RMR regions to handle MSI nested binding Shameer Kolothum via
2024-11-13 18:31 ` Nicolin Chen
2024-11-14 8:48 ` Shameerali Kolothum Thodi via
2024-11-14 8:48 ` Shameerali Kolothum Thodi via
2024-11-14 10:41 ` Eric Auger
2024-11-15 22:12 ` Nicolin Chen
2024-12-10 23:01 ` Nicolin Chen
2024-12-11 0:48 ` Jason Gunthorpe
2024-12-11 1:28 ` Nicolin Chen
2024-12-11 13:11 ` Jason Gunthorpe
2024-12-11 17:20 ` Nicolin Chen
2024-12-11 18:01 ` Jason Gunthorpe
2024-11-12 22:59 ` [RFC PATCH 0/5] hw/arm/virt: Add support for user-creatable nested SMMUv3 Nicolin Chen
2024-11-14 7:56 ` Shameerali Kolothum Thodi via
2024-11-14 7:56 ` Shameerali Kolothum Thodi via
2024-11-20 23:59 ` Nathan Chen
2024-11-21 10:12 ` Shameerali Kolothum Thodi via
2024-11-22 1:41 ` Nathan Chen
2024-11-22 17:38 ` Shameerali Kolothum Thodi via
2024-11-22 18:53 ` Nathan Chen
2025-02-04 14:00 ` Eric Auger
2024-12-13 11:58 ` Daniel P. Berrangé
2024-12-13 12:43 ` Jason Gunthorpe
2024-12-12 23:54 ` Nathan Chen
2024-12-13 1:01 ` Nathan Chen
2024-12-16 9:31 ` Shameerali Kolothum Thodi via
2024-12-16 9:31 ` Shameerali Kolothum Thodi via
2025-01-25 2:43 ` Nathan Chen
2025-01-27 15:26 ` Shameerali Kolothum Thodi via
2025-01-27 15:26 ` Shameerali Kolothum Thodi via
2025-01-27 23:35 ` Nathan Chen
2024-11-13 16:16 ` Mostafa Saleh
2024-11-14 8:01 ` Shameerali Kolothum Thodi via
2024-11-14 8:01 ` Shameerali Kolothum Thodi via
2024-11-14 11:49 ` Mostafa Saleh
2024-11-13 21:42 ` Nicolin Chen
2024-11-14 9:11 ` Shameerali Kolothum Thodi via
2024-11-14 9:11 ` Shameerali Kolothum Thodi via
2024-11-18 10:50 ` Eric Auger
2025-01-30 16:41 ` Daniel P. Berrangé
2024-12-13 12:00 ` Daniel P. Berrangé
2024-12-13 12:46 ` Jason Gunthorpe
2024-12-13 13:19 ` Daniel P. Berrangé
2024-12-16 9:38 ` Shameerali Kolothum Thodi via
2024-12-17 18:36 ` Donald Dutile
2024-12-13 13:33 ` Peter Maydell
2024-12-16 10:01 ` Shameerali Kolothum Thodi via
2024-12-16 10:01 ` Shameerali Kolothum Thodi via
2025-01-09 4:45 ` Nicolin Chen
2025-01-11 4:05 ` Donald Dutile
2025-01-23 4:10 ` Nicolin Chen
2025-01-23 8:28 ` Shameerali Kolothum Thodi via
2025-01-23 8:28 ` Shameerali Kolothum Thodi via
2025-01-23 8:40 ` Nicolin Chen
2025-01-23 11:07 ` Duan, Zhenzhong
2025-02-17 9:17 ` Duan, Zhenzhong
2025-02-18 6:52 ` Shameerali Kolothum Thodi via
2025-03-06 17:59 ` Eric Auger
2025-03-06 18:27 ` Shameerali Kolothum Thodi via
2025-03-06 18:27 ` Shameerali Kolothum Thodi via
2025-03-06 18:40 ` Eric Auger
2025-01-31 16:54 ` Eric Auger
2025-02-03 18:50 ` Nicolin Chen
2025-02-04 17:49 ` Eric Auger
2025-02-05 0:08 ` Nicolin Chen
2025-02-05 10:43 ` Shameerali Kolothum Thodi via
2025-02-05 10:43 ` Shameerali Kolothum Thodi via
2025-02-05 12:35 ` Eric Auger
2025-02-06 10:34 ` Shameerali Kolothum Thodi via
2025-02-06 10:34 ` Shameerali Kolothum Thodi via
2025-02-06 18:58 ` Nicolin Chen
2025-03-03 15:21 ` Shameerali Kolothum Thodi via
2025-03-03 15:21 ` Shameerali Kolothum Thodi via
2025-03-03 17:04 ` Nicolin Chen
2025-03-04 9:30 ` Shameerali Kolothum Thodi via
2025-03-04 9:30 ` Shameerali Kolothum Thodi via
2025-01-30 16:00 ` Daniel P. Berrangé
2025-01-30 18:09 ` Shameerali Kolothum Thodi via
2025-01-30 18:09 ` Shameerali Kolothum Thodi via
2025-01-31 9:33 ` Shameerali Kolothum Thodi via
2025-01-31 9:33 ` Shameerali Kolothum Thodi via
2025-01-31 10:07 ` Eric Auger
2025-01-31 14:24 ` Jason Gunthorpe
2025-01-31 14:39 ` Shameerali Kolothum Thodi via
2025-01-31 14:39 ` Shameerali Kolothum Thodi via
2025-01-31 14:54 ` Jason Gunthorpe
2025-01-31 15:23 ` Shameerali Kolothum Thodi via
2025-01-31 15:23 ` Shameerali Kolothum Thodi via
2025-01-31 16:08 ` Eric Auger
2025-02-05 20:53 ` Nathan Chen
2025-02-06 8:54 ` Daniel P. Berrangé
2025-02-06 8:53 ` Daniel P. Berrangé
2025-02-06 16:44 ` Eric Auger
2025-01-31 21:41 ` Daniel P. Berrangé
2025-02-06 10:02 ` Shameerali Kolothum Thodi via
2025-02-06 10:02 ` Shameerali Kolothum Thodi via
2025-02-06 10:37 ` Daniel P. Berrangé
2025-02-06 13:51 ` Shameerali Kolothum Thodi via
2025-02-06 13:51 ` Shameerali Kolothum Thodi via
2025-02-06 14:46 ` Daniel P. Berrangé
2025-02-06 15:07 ` Shameerali Kolothum Thodi via
2025-02-06 15:07 ` Shameerali Kolothum Thodi via
2025-02-06 17:02 ` Jason Gunthorpe
2025-02-06 17:10 ` Daniel P. Berrangé
2025-02-06 17:46 ` Jason Gunthorpe
2025-02-06 17:54 ` Daniel P. Berrangé
2025-02-06 17:58 ` Jason Gunthorpe
2025-02-06 18:04 ` Shameerali Kolothum Thodi via
2025-02-06 18:04 ` Shameerali Kolothum Thodi via
2025-02-06 18:13 ` Jason Gunthorpe
2025-02-06 18:18 ` Shameerali Kolothum Thodi via
2025-02-06 18:18 ` Shameerali Kolothum Thodi via
2025-02-06 18:22 ` Jason Gunthorpe
2025-02-06 20:33 ` Nicolin Chen
2025-02-06 20:38 ` Jason Gunthorpe
2025-02-06 20:48 ` Nicolin Chen
2025-02-06 21:11 ` Jason Gunthorpe
2025-02-06 22:46 ` Nicolin Chen
2025-02-07 0:08 ` Jason Gunthorpe
2025-02-07 10:21 ` Shameerali Kolothum Thodi via
2025-02-07 10:21 ` Shameerali Kolothum Thodi via
2025-02-07 10:31 ` Daniel P. Berrangé
2025-02-07 12:21 ` Shameerali Kolothum Thodi via
2025-02-07 12:21 ` Shameerali Kolothum Thodi via
2025-02-07 12:53 ` Jason Gunthorpe
2025-02-06 18:18 ` Daniel P. Berrangé
2025-02-06 17:57 ` Shameerali Kolothum Thodi via
2025-02-06 17:59 ` Jason Gunthorpe
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