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Diffstat (limited to 'gitlab/issues/target_i386/host_missing/accel_TCG/2578.toml')
| -rw-r--r-- | gitlab/issues/target_i386/host_missing/accel_TCG/2578.toml | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/gitlab/issues/target_i386/host_missing/accel_TCG/2578.toml b/gitlab/issues/target_i386/host_missing/accel_TCG/2578.toml new file mode 100644 index 000000000..220963fc5 --- /dev/null +++ b/gitlab/issues/target_i386/host_missing/accel_TCG/2578.toml @@ -0,0 +1,22 @@ +id = 2578 +title = "x86: exception during hardware interrupt pushes wrong error code" +state = "opened" +created_at = "2024-09-19T09:09:25.955Z" +closed_at = "n/a" +labels = ["accel: TCG", "target: i386", "workflow::Patch available"] +url = "https://gitlab.com/qemu-project/qemu/-/issues/2578" +host-os = "- OS/kernel version:" +host-arch = "- QEMU flavor: qemu-system-x86_64 qemu-system-i386" +qemu-version = "all" +guest-os = "- OS/kernel version:" +guest-arch = "x86" +description = """Exceptions during IDT traversal push the wrong error code when triggered by a hardware interrupt. +The EXT bit in TCG mode is never set. However, it works fine in KVM mode as hardware is generating the number.""" +reproduce = """1. load a short IDT e.g. with 64 entries +2. trigger a self IPI through the LAPIC with a vector 100 +3. the pushed error code is 802 instead of 803.""" +additional = """It can be fixed in the lines `raise_exception_err(env, EXCP0D_GPF, intno * 8 + 2);` in `seg_helper.c` +which must include the `is_hw` field when calculating the error number. Something like `intno * 8 + 2 + (is_hw != 0)` +works here. + +Nevertheless, all the other exception cases in the `do_interrupt_*` functions have to set the same bit as well.""" |