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[RFC PATCH 0/2] QEMU: Dynamic trap/untrap of VFIO PCI BARs
From: |
Yan Zhao |
Subject: |
[RFC PATCH 0/2] QEMU: Dynamic trap/untrap of VFIO PCI BARs |
Date: |
Wed, 4 Dec 2019 22:44:51 -0500 |
This patchset enables PCI BARs to be dynamically trapped/passthroughed
in response to vendor driver's needs.
To dynamic trap/untrap PCI BARs, 3 info required:
(1) which part of PCI BARs are to be trapped/passthroughed
(2) when to do the trap/passthrough transition
(3) to trap or to passthrough
Patch 1 let vendor driver specify which sparse mmaped subregions are
disablable. Therefore providing the first info.
Patch 2 probes and creates dynamic trap bar info region, whose
"dt_fd" field provides the second info, and
"trap" field provide the third info.
The corresponding kernel implementation is at
https://www.spinics.net/lists/kernel/msg3337337.html.
Yan Zhao (2):
hw/vfio: add a 'disablable' flag to sparse mmaped region
hw/vfio/pci: init dynamic-trap-bar-info region
hw/vfio/common.c | 28 +++++++-
hw/vfio/pci.c | 117 ++++++++++++++++++++++++++++++++++
hw/vfio/pci.h | 5 ++
hw/vfio/trace-events | 4 +-
include/hw/vfio/vfio-common.h | 2 +
linux-headers/linux/vfio.h | 13 ++++
6 files changed, 167 insertions(+), 2 deletions(-)
--
2.17.1
- [RFC PATCH 0/2] QEMU: Dynamic trap/untrap of VFIO PCI BARs,
Yan Zhao <=