On 21/12/25 13:25, Yao Zi wrote:
Reading/writing unimplemented IOCSR on real LoongArch hardware doesn't trigger any exceptions, instead, reading always results in zero and writing is simply ignored.Real-world applications, like memtest86plus, depend on the behavior to run. However, since commit f2e61edb2946 ("hw/loongarch/virt: Use MemTxAttrs interface for misc ops") which adds a call to g_assert_not_reached() in the path of handling unimplemented IOCSRs, QEMU would abort in the case. Replace the assertion with qemu_log_mask(LOG_UNIMP, ...), so these applications could run. It's still possible to examine unimplemented IOCSR access through "-d unimp" command line arguments. Fixes: f2e61edb2946 ("hw/loongarch/virt: Use MemTxAttrs interface for misc ops") Signed-off-by: Yao Zi <[email protected]> --- hw/loongarch/virt.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
Reviewed-by: Philippe Mathieu-Daudé <[email protected]>
