diff options
Diffstat (limited to 'gitlab/issues/target_arm/host_missing/accel_missing/2886.toml')
| -rw-r--r-- | gitlab/issues/target_arm/host_missing/accel_missing/2886.toml | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/gitlab/issues/target_arm/host_missing/accel_missing/2886.toml b/gitlab/issues/target_arm/host_missing/accel_missing/2886.toml new file mode 100644 index 00000000..2732d4d9 --- /dev/null +++ b/gitlab/issues/target_arm/host_missing/accel_missing/2886.toml @@ -0,0 +1,23 @@ +id = 2886 +title = "ACPI MADT advertises GITS even when disabled" +state = "opened" +created_at = "2025-03-28T15:50:00.229Z" +closed_at = "n/a" +labels = ["ACPI", "target: arm", "workflow::Patch available"] +url = "https://gitlab.com/qemu-project/qemu/-/issues/2886" +host-os = "Linux" +host-arch = "Host:x86 Guest:Arm" +qemu-version = "9.2.3" +guest-os = "Custom OS" +guest-arch = "Arm (aarch64)" +description = """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.""" +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 = """When booting with `its=on` (default), everything works as expected.""" |