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authorChristian Krinitsin <mail@krinitsin.com>2025-07-03 19:39:53 +0200
committerChristian Krinitsin <mail@krinitsin.com>2025-07-03 19:39:53 +0200
commitdee4dcba78baf712cab403d47d9db319ab7f95d6 (patch)
tree418478faf06786701a56268672f73d6b0b4eb239 /results/classifier/deepseek-2/output/hypervisor/2886
parent4d9e26c0333abd39bdbd039dcdb30ed429c475ba (diff)
downloademulator-bug-study-dee4dcba78baf712cab403d47d9db319ab7f95d6.tar.gz
emulator-bug-study-dee4dcba78baf712cab403d47d9db319ab7f95d6.zip
restructure results
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-
-ACPI MADT advertises GITS even when disabled
-Description of problem:
-As per the command line given above, QEMU shall emulate a GICv4 without GIC Interrupt Translation Service (GITS).
-
-The following happens:
-- ACPI **incorrectly** lists a GITS (type 0xf) structure in the MADT with GITS MMIO Base = 0x8080000
-- The OS reads that structure and interprets it to mean a GITS is present at the given MMIO address
-- Subsequent access to GITS MMIO causes a data abort (0x25) because QEMU doesn't emulate a GITS (as requested)
-
-The bug is thus that QEMU wrongly advertises GITS as present (via the MADT) when it is in fact absent.
-Steps to reproduce:
-1. Disable GITS emulation by passing `its=off` on the QEMU command line
-2. Check if a GITS structure is listed in the ACPI MADT (must be present in ACPI MADT only if GITS is enabled and absent otherwise)
-Additional information:
-When booting with `its=on` (default), everything works as expected.