On 12/1/22 10:44, Thomas Huth wrote:
The SET ADDRESS SPACE CONTROL FAST instruction is not privileged, it can be
used from problem space, too. Just the switching to the home address space
is privileged and should still generate a privilege exception. This bug is
e.g. causing programs like Java that use the "getcpu" vdso kernel function
to crash (see https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=990417#26 ).
While we're at it, also check if DAT is not enabled. In that case the
instruction is supposed to generate a special operation exception.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/655
Signed-off-by: Thomas Huth <th...@redhat.com>
---
Looks ok, as far as it goes. We appear to be missing the check for CR0_SECONDARY, which
is unpredictable for SACF but mandatory for SAC.
I'll give you
Reviewed-by: Richard Henderson <richard.hender...@linaro.org>
for fixing the incorrect IF_PRIV check, which by itself should be enough to fix the Java
issue.
r~
