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Diffstat (limited to 'gitlab/issues/target_arm/host_missing/accel_missing/1078.toml')
| -rw-r--r-- | gitlab/issues/target_arm/host_missing/accel_missing/1078.toml | 52 |
1 files changed, 0 insertions, 52 deletions
diff --git a/gitlab/issues/target_arm/host_missing/accel_missing/1078.toml b/gitlab/issues/target_arm/host_missing/accel_missing/1078.toml deleted file mode 100644 index 0b48653bb..000000000 --- a/gitlab/issues/target_arm/host_missing/accel_missing/1078.toml +++ /dev/null @@ -1,52 +0,0 @@ -id = 1078 -title = "qemu-system-arm: unable to use LPAE" -state = "closed" -created_at = "2022-06-16T11:56:50.844Z" -closed_at = "2022-06-27T22:55:20.002Z" -labels = ["Closed::Fixed", "target: arm"] -url = "https://gitlab.com/qemu-project/qemu/-/issues/1078" -host-os = "Ubuntu 18.04.6 LTS" -host-arch = "x86_64" -qemu-version = "QEMU emulator version 7.0.50 (v7.0.0-1865-g9ac873a469-dirty)" -guest-os = "irrelevant" -guest-arch = "qemuarm cortex-a15" -description = """Failed to run qemu: qemu-system-arm: Addressing limited to 32 bits, -but memory exceeds it by 1073741824 bytes""" -reproduce = """1. ./configure --target-list=arm-softmmu -2. make -3. -./qemu-system-arm \\ --machine virt,highmem=on \\ --cpu cortex-a15 -smp 4 \\ --m 4096 \\ --kernel ./zImage \\ --drive id=disk0,file=./rootfs.ext4,if=none,format=raw \\ --object rng-random,filename=/dev/urandom,id=rng0 \\ --device virtio-rng-pci,rng=rng0 \\ --device virtio-blk-device,drive=disk0 \\ --device virtio-gpu-pci \\ --serial mon:stdio -serial null \\ --nographic \\ --append 'root=/dev/vda rw mem=4096M ip=dhcp console=ttyAMA0 console=hvc0'""" -additional = """We set physical address bits to 40 if ARM_FEATURE_LPAE is enabled. But ARM_FEATURE_V7VE also implies ARM_FEATURE_LPAE as set later in arm_cpu_realizefn. - -We should add condition for ARM_FEATURE_V7VE, otherwise we would not be able to use highmem larger than 3GB even though we have enabled highmem, since we would fail and return right from machvirt_init. - -I have already made a patch to fix this issue. -https://gitlab.com/realhezhe/qemu/-/commit/4dad8167c1c1a7695af88d8929e8d7f6399177de -`hw/arm/virt.c` -```c - if (object_property_get_bool(cpuobj, "aarch64", NULL)) { - pa_bits = arm_pamax(armcpu); - } else if (arm_feature(&armcpu->env, ARM_FEATURE_LPAE)) { - } else if (arm_feature(&armcpu->env, ARM_FEATURE_LPAE) - || arm_feature(&armcpu->env, ARM_FEATURE_V7VE)) { - /* v7 with LPAE */ - pa_bits = 40; - } else { -``` - -After applying the patch, I can make sure that the pa_bits has already been set to 40, but qemu hangs later. By bisecting I found if the following commit is reverted qemu can boot up successfully.. -39a1fd2528 ("target/arm: Fix handling of LPAE block descriptors") - -It can't be quickly determined what's going on here at my side. Maybe the author can help give some hints. Thanks.""" |