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Diffstat (limited to 'gitlab/issues/target_m68k/host_missing/accel_missing/2807.toml')
| -rw-r--r-- | gitlab/issues/target_m68k/host_missing/accel_missing/2807.toml | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/gitlab/issues/target_m68k/host_missing/accel_missing/2807.toml b/gitlab/issues/target_m68k/host_missing/accel_missing/2807.toml new file mode 100644 index 000000000..39cca3987 --- /dev/null +++ b/gitlab/issues/target_m68k/host_missing/accel_missing/2807.toml @@ -0,0 +1,39 @@ +id = 2807 +title = "DOUBLE MMU FAULT when running -M virt in qemu-system-m68k" +state = "closed" +created_at = "2025-02-10T17:10:09.117Z" +closed_at = "2025-02-10T18:34:05.422Z" +labels = ["target: m68k", "workflow::Needs Info"] +url = "https://gitlab.com/qemu-project/qemu/-/issues/2807" +host-os = "Windows 11" +host-arch = "x86_64" +qemu-version = "QEMU emulator version 9.2.0 (v9.2.0-12071-g3dd0aeb44b)" +guest-os = "None, I'm writing one." +guest-arch = "m68k" +description = """When running qemu-system-m68k with the -M virt machine type, a DOUBLE MMU FAULT occurs immediately upon startup, even without any BIOS, disk image, or additional configuration.""" +reproduce = """1. qemu-system-m68k -M virt -m 4M -serial stdio + +QEMU crashes immediately with the following output: +``` +qemu: fatal: DOUBLE MMU FAULT +D0 = 00000000 A0 = 00000000 F0 = 7fff ffffffffffffffff ( nan) +D1 = 00000000 A1 = 00000000 F1 = 7fff ffffffffffffffff ( nan) +D2 = 00000000 A2 = 00000000 F2 = 7fff ffffffffffffffff ( nan) +D3 = 00000000 A3 = 00000000 F3 = 7fff ffffffffffffffff ( nan) +D4 = 00000000 A4 = 00000000 F4 = 7fff ffffffffffffffff ( nan) +D5 = 00000000 A5 = 00000000 F5 = 7fff ffffffffffffffff ( nan) +D6 = 00000000 A6 = 00000000 F6 = 7fff ffffffffffffffff ( nan) +D7 = 00000000 A7 = 00000000 F7 = 7fff ffffffffffffffff ( nan) +PC = 00400000 SR = 2704 T:0 I:7 SI --Z-- +FPSR = 00000000 ---- + FPCR = 0000 X RN + A7(MSP) = 00000000 A7(USP) = 00000000 ->A7(ISP) = 00000000 +VBR = 0x00000000 +SFC = 0 DFC 0 +SSW 00000105 TCR 00000000 URP 00000000 SRP 00000000 +DTTR0/1: 00000000/00000000 ITTR0/1: 00000000/00000000 +MMUSR 00000000, fault at fffffffc +```""" +additional = """The issue seems to be related to incorrect memory initialization, causing a fault at address fffffffc. +The PC = 00400000 suggests that QEMU is jumping to an invalid address early in the boot process. +The fact that the fault is consistent across different configurations (q800, next-cube, etc) points to a possible regression or incomplete memory initialization in the virt machine.""" |