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Author SHA1 Message Date
Claudio Fontana b39030942d i386: split svm_helper into sysemu and stub-only user 
For now we just copy over the previous user stubs, but really,

everything that requires s->cpl == 0 should be impossible
to trigger from user-mode emulation.

Later on we should add a check that asserts this easily f.e.:

static bool check_cpl0(DisasContext *s)
{
     int cpl = s->cpl;
 #ifdef CONFIG_USER_ONLY
     assert(cpl == 3);
 #endif
     if (cpl != 0) {
         gen_exception(s, EXCP0D_GPF, s->pc_start - s->cs_base);
         return false;
     }
     return true;
}

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210322132800.7470-17-cfontana@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 2021-05-10 15:41:51 -04:00
Claudio Fontana a4b1f4e611 i386: split misc helper user stubs and sysemu part 
Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

[claudio]:
Rebased on da3f3b02("target/i386: fail if toggling LA57 in 64-bitmode")

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Message-Id: <20210322132800.7470-15-cfontana@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 2021-05-10 15:41:51 -04:00
Claudio Fontana e7f2670f2a i386: split tcg excp_helper into sysemu and user parts 
Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

[claudio]:
Rebased on commit b8184135 ("target/i386: allow modifying TCG phys-addr-bits")

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Message-Id: <20210322132800.7470-13-cfontana@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 2021-05-10 15:41:51 -04:00
Paolo Bonzini 222f3e6f19 i386: split off sysemu-only functionality in tcg-cpu 
Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210322132800.7470-11-cfontana@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 2021-05-10 15:41:50 -04:00