mbox series

[RFC,0/5] Change ghes driver to use HEST-based offsets

Message ID cover.1727782588.git.mchehab+huawei@kernel.org
Headers show
Series Change ghes driver to use HEST-based offsets | expand

Message

Mauro Carvalho Chehab Oct. 1, 2024, 11:42 a.m. UTC 
This RFC series was part of the previous PR to add generic error injection
support on GHES.

It contains only the changes of the math used to calculate offsets at
HEST table and hardware_error firmware file.

The first patch adds a new firmware file to store HEST address.
The second patch makes use of it.
The remaining ones add migration support.

PS.: I'm sending this as a RFC as using the proceudure defined at the
pseudo-migration of:

	https://www.linux-kvm.org/page/Migration

Didn't work. I tried to use two different QEMU versions to check a
real life case and also to use just one QEMU and trying to load a
virt-9.1 state on a virt-9.2 machine. 

For instance, trying to restore a virt-9.1 state on virt-9.2 gave me
this error:

	(qemu) qemu: Machine type received is 'virt-9.1' and local is 'virt-9.2'
	qemu: load of migration failed: Invalid argument

Yet, running virt-9.1 used the old math code (offsets from hardware_errors firmware
file) while running virt-9.2 executed the new math code using HEST address.

Mauro Carvalho Chehab (5):
  acpi/ghes: add a firmware file with HEST address
  acpi/ghes: Use HEST table offsets when preparing GHES records
  acpi/generic_event_device: Update GHES migration to cover hest addr
  acpi/generic_event_device: add logic to detect if HEST addr is
    available
  arm/virt-acpi-build: Properly handle virt-9.1

 hw/acpi/generic_event_device.c |  30 +++++++++
 hw/acpi/ghes.c                 | 108 ++++++++++++++++++++++++++++++---
 hw/arm/virt-acpi-build.c       |  30 +++++++--
 hw/core/machine.c              |   4 +-
 include/hw/acpi/ghes.h         |   2 +
 5 files changed, 159 insertions(+), 15 deletions(-)