Messages in this thread | | | From | Mihai Carabas <> | Subject | [PATCH v8] add support for pci in the pvpanic driver | Date | Wed, 24 Mar 2021 16:49:13 +0200 |
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This patchset adds support for PCI in the pvpanic driver. The device already got in qemu [1].
v2: - mmio -> MMIO, pci -> PCI suggested by Randy Dunlap. - group pvpanic-common.c and mmio.c in the same module. The intention was to have only one module and the common code splitted up to be re-used by the pvpanic-pci module in the next patch. - add a new patch where add the licenses for the new files (when I moved the code to mmio.c I preserved the original licenses there) - properly clean-up PCI device when driver removed.
v3: - drop patch 3 with licenses and add them when creating files - create a new patch (2/3) which allowes multiple pvpanic instances
v4: - fix Makefile in patch 1/3 and 3/3 for pvpanic.o as suggested by Arnd
v5: - rebase on 5.12 - fix a warning caused by one of the patches
v6: - remove pr_fmt as were not used - "remove" functions of type void - moved events/capability per-device structure
v7: - rebased on char-misc-next
v8: - fixed build error while compiling only the first patch (accept my apologizes Greg) - build and tested pvpanic functionality after each applied patch
How to test:
Run a VM with latest qemu which has the pvpanic-pci device: qemu-system-aarch64 -device pvpanic-pci
Generate a panic in the guest: echo 1 > /proc/sys/kernel/sysrq echo c > /proc/sysrq-trigger
Observe in the QMP console the panic events received by the device:
{"timestamp": {"seconds": 1613122186, "microseconds": 141729}, "event": "GUEST_PANICKED", "data": {"action": "pause"}}
{"timestamp": {"seconds": 1613122186, "microseconds": 141833}, "event": "GUEST_PANICKED", "data": {"action": "poweroff"}}
{"timestamp": {"seconds": 1613122186, "microseconds": 141896}, "event": "SHUTDOWN", "data": {"guest": true, "reason": "guest-panic"}}
[1] https://github.com/qemu/qemu/commit/9df52f58e76e904fb141b10318362d718f470db2
Mihai Carabas (3): misc/pvpanic: split-up generic and platform dependent code misc/pvpanic: probe multiple instances misc/pvpanic: add PCI driver
.../ABI/testing/sysfs-bus-pci-devices-pvpanic | 4 +- drivers/misc/Kconfig | 9 +- drivers/misc/Makefile | 2 +- drivers/misc/pvpanic.c | 161 --------------------- drivers/misc/pvpanic/Kconfig | 27 ++++ drivers/misc/pvpanic/Makefile | 8 + drivers/misc/pvpanic/pvpanic-mmio.c | 144 ++++++++++++++++++ drivers/misc/pvpanic/pvpanic-pci.c | 125 ++++++++++++++++ drivers/misc/pvpanic/pvpanic.c | 113 +++++++++++++++ drivers/misc/pvpanic/pvpanic.h | 21 +++ 10 files changed, 443 insertions(+), 171 deletions(-) delete mode 100644 drivers/misc/pvpanic.c create mode 100644 drivers/misc/pvpanic/Kconfig create mode 100644 drivers/misc/pvpanic/Makefile create mode 100644 drivers/misc/pvpanic/pvpanic-mmio.c create mode 100644 drivers/misc/pvpanic/pvpanic-pci.c create mode 100644 drivers/misc/pvpanic/pvpanic.c create mode 100644 drivers/misc/pvpanic/pvpanic.h
-- 1.8.3.1
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