Apple's Hypervisor.Framework forwards cache operations as MMIO traps
into user space. For MMIO however, these have no meaning: There is no
cache attached to them.
So let's just treat cache data exits as nops.
This fixes OpenBSD booting as guest.
Reported-by: AJ Barris <AwlsomeAlex@github.com>
Signed-off-by: Alexander Graf <agraf@csgraf.de>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Mark Kettenis <kettenis@openbsd.org>
Reference: https://github.com/utmapp/UTM/issues/3197
Message-Id: <
20211026071241.74889-1-agraf@csgraf.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
uint32_t sas = (syndrome >> 22) & 3;
uint32_t len = 1 << sas;
uint32_t srt = (syndrome >> 16) & 0x1f;
+ uint32_t cm = (syndrome >> 8) & 0x1;
uint64_t val = 0;
trace_hvf_data_abort(env->pc, hvf_exit->exception.virtual_address,
hvf_exit->exception.physical_address, isv,
iswrite, s1ptw, len, srt);
+ if (cm) {
+ /* We don't cache MMIO regions */
+ advance_pc = true;
+ break;
+ }
+
assert(isv);
if (iswrite) {