On 05/07/2024 08:20, Yi Liu wrote:
On 2024/7/5 13:13, CLEMENT MATHIEU--DRIF wrote:
On 05/07/2024 05:03, Yi Liu wrote:
Caution: External email. Do not open attachments or click links,
unless this email comes from a known sender and you know the content
is safe.
On 2024/5/30 20:24, CLEMENT MATHIEU--DRIF wrote:
This series belongs to a list of series that add SVM support for VT-d.
Here we focus on the implementation of PRI support in the IOMMU and
on a PCI-level
API for PRI to be used by virtual devices.
This work is based on the VT-d specification version 4.1 (March 2023).
Here is a link to a GitHub repository where you can find the
following elements :
- Qemu with all the patches for SVM
- ATS
- PRI
- Device IOTLB invalidations
- Requests with already translated addresses
- A demo device
- A simple driver for the demo device
- A userspace program (for testing and demonstration purposes)
I didn't see the drain PRQ related logics in this series. Please
consider
adding it in next version. It's needed when repurposing a PASID.
Hi,
Are you talking about wait descriptors with SW = 0, IF = 0, FN = 1
(section 7.10 of VT-d)?
I'll move that to the PRI series.
yes. But not only that patch. When guest software submitting the
descriptors per CH7.10 of VT-d spec, QEMU need to emulate the
PRQ drain behavior.
Ok, will check
https://github.com/BullSequana/Qemu-in-guest-SVM-demo
Clément Mathieu--Drif (8):
pcie: add a helper to declare the PRI capability for a pcie device
pcie: helper functions to check to check if PRI is enabled
pcie: add a way to get the outstanding page request allocation
(pri)
from the config space.
pci: declare structures and IOMMU operation for PRI
pci: add a PCI-level API for PRI
intel_iommu: declare PRI constants and structures
intel_iommu: declare registers for PRI
intel_iommu: add PRI operations support
hw/i386/intel_iommu.c | 302
+++++++++++++++++++++++++++++++++
hw/i386/intel_iommu_internal.h | 54 +++++-
hw/pci/pci.c | 37 ++++
hw/pci/pcie.c | 42 +++++
include/exec/memory.h | 65 +++++++
include/hw/pci/pci.h | 45 +++++
include/hw/pci/pci_bus.h | 1 +
include/hw/pci/pcie.h | 7 +-
include/hw/pci/pcie_regs.h | 4 +
system/memory.c | 49 ++++++
10 files changed, 604 insertions(+), 2 deletions(-)
--
Regards,
Yi Liu
