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| author |   Xiaoyao Li <xiaoyao.li@intel.com> | 2024-04-03 10:59:53 -0400 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2024-04-23 17:35:25 +0200 |
| commit | 292dd287e78e0cbafde9d1522c729349d132d844 (patch) | |
| tree | d81d1316e03c2bfff0b4c53d50c29461bfc575bf /linux-headers/linux/bits.h | |
| parent | q35: Introduce smm_ranges property for q35-pci-host (diff) | |
| download | qemu-292dd287e78e0cbafde9d1522c729349d132d844.tar.xz qemu-292dd287e78e0cbafde9d1522c729349d132d844.zip | |
hw/i386/acpi: Set PCAT_COMPAT bit only when pic is not disabled
A value 1 of PCAT_COMPAT (bit 0) of MADT.Flags indicates that the system
also has a PC-AT-compatible dual-8259 setup, i.e., the PIC. When PIC
is not enabled (pic=off) for x86 machine, the PCAT_COMPAT bit needs to
be cleared. The PIC probe should then print:
[ 0.155970] Using NULL legacy PIC
However, no such log printed in guest kernel unless PCAT_COMPAT is
cleared.
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Message-ID: <20240403145953.3082491-1-xiaoyao.li@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'linux-headers/linux/bits.h')
0 files changed, 0 insertions, 0 deletions