On 1/14/20 5:09 AM, Alex Bennée wrote: > This test exercises the gdbstub while runing the sve-iotcl test. I > haven't plubmed it into make system as we need a way of verifying if > gdb has the right support for SVE. > > Signed-off-by: Alex Bennée <alex.ben...@linaro.org> > > --- > v4 > - interrogate ZCR_EL1 directly as no longer have vg
Note that ZCR_EL1 does not give you the correct answer if the hypervisor has set ZCR_EL2 to something lower. Also, ZCR_EL1 it itself not correct if the hardware does not support all vector sizes. See some of Andrew Jones' qemu command-line work. Try -cpu max,sve512=on and then use the ioctl to set vq to 3 (sve384). The result will be an effective vq of 2 (sve256). We *really* need vg, as computed from sve_zcr_len_for_el(). r~
