Am 6. Januar 2024 13:25:43 UTC schrieb Bernhard Beschow <shen...@gmail.com>:
>This series is part of my work emulating the VIA Apollo Pro 133T chipset in
>QEMU
>
>[1] and testing it by running real-world BIOSes on it. The first two patches
>fix
>
>an issue regarding PIC interrupt handling, the third one just fixes a typo in a
>
>comment.
>
>
>
>During testing, I've found that the boot process gets stuck for some BIOSes
>that
>
>disable the LAPIC globally (by disabling the enable bit in the base address
>
>register). QEMU seems to emulate PIC interrupt handling only if a CPU doesn't
>
>have a LAPIC, and always emulates LAPIC interrupt handling if one is present.
>
>According to the Intel documentation, a CPU should resort to PIC interrupt
>
>handling if its LAPIC is globally didabled. This series fixes this corner case
>
>which makes the boot process succeed. More details can be found in the commit
>
>message.
>
>
>
>Testing done:
>
>* `make check`
>
>* `make check-avocado`
>
>
>
>v2:
>
>* Pick up R-b tag
>
>* Split and rework interrupt handling patch to consider i486 SMP systems. This
>
> required dropping Alex' R-b tag.
>
Ping
>
>
>[1] https://github.com/shentok/qemu/tree/via-apollo-pro-133t
>
>
>
>Bernhard Beschow (3):
>
> hw/i386/x86: Reverse if statement
>
> hw/i386/x86: Fix PIC interrupt handling if APIC is globally disabled
>
> target/i386/cpu: Fix typo in comment
>
>
>
> include/hw/i386/apic.h | 1 +
>
> hw/i386/x86.c | 8 ++++----
>
> hw/intc/apic_common.c | 13 +++++++++++++
>
> target/i386/cpu.c | 2 +-
>
> 4 files changed, 19 insertions(+), 5 deletions(-)
>
>
>
>-- >
>2.43.0
>
>
>
