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Diffstat (limited to 'gitlab/issues/target_arm/host_missing/accel_missing/2155.toml')
| -rw-r--r-- | gitlab/issues/target_arm/host_missing/accel_missing/2155.toml | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/gitlab/issues/target_arm/host_missing/accel_missing/2155.toml b/gitlab/issues/target_arm/host_missing/accel_missing/2155.toml new file mode 100644 index 000000000..5d0dc63e7 --- /dev/null +++ b/gitlab/issues/target_arm/host_missing/accel_missing/2155.toml @@ -0,0 +1,31 @@ +id = 2155 +title = "LoadVM assert on ARM_FEATURE_M for Cortex M3" +state = "closed" +created_at = "2024-02-07T18:22:10.940Z" +closed_at = "2024-02-16T10:58:42.355Z" +labels = ["kind::Bug", "target: arm", "workflow::Patch available"] +url = "https://gitlab.com/qemu-project/qemu/-/issues/2155" +host-os = "Ubuntu 20.04" +host-arch = "x86_64" +qemu-version = "v8.0.0 through v8.2.0" +guest-os = "-" +guest-arch = "ARM Cortex M3" +description = """This appears to be a similar issue to https://gitlab.com/qemu-project/qemu/-/issues/1775 and https://gitlab.com/qemu-project/qemu/-/issues/1658 + +When running `loadvm` qemu aborts with this error: + +"qemu/target/arm/helper.c:12383: arm_security_space_below_el3: Assertion `!arm_feature(env, ARM_FEATURE_M)' failed." + +I've traced the error to `pmu_counter_enabled` in `qemu\\target\\arm\\helper.c:1172` + [uint64_t mdcr_el2 = arm_mdcr_el2_eff(env)](https://gitlab.com/qemu-project/qemu/-/blob/v8.2.0/target/arm/helper.c?ref_type=tags#L1172) (link is to 8.2.0 release tag) + + +The issue is caused by attempting to get the MDCR_EL2 register prior to checking if the CPU has ARM_FEATURE_PMU support. + +A simple fix seems to be to check for `ARM_PMU_ENABLED` and returning early if it is not enabled.""" +reproduce = """1. Start emulation and connect monitor +2. savevm <snapshot-name> +3. Loadvm <snapshot-name>""" +additional = """See screenshot for stack trace + +""" |