Necessary to handle callbacks (e.g. rom_reset) from UI thread which will
flush TBs and reference thread-local TCG context, which is initialized
for main QEMU thread early on as tcg_init_ctx.
In lieu of proper writeback cache emulation, mark the flash ROM memory
region(s) as writeable. This is necessary to enable later Xbox kernel
revisions which write to a single address within this region during very
early startup code and expect the written value to persist when read
back in the next instruction. See comment in patch for more details.
This only works with DXT1/S3TC if the implementation has the
NV_texture_compression_vtc extension, otherwise GL_INVALID_ENUM will be
raised. Bail out in this case, until a software fallback is implemented.
See the following commits for more info:
- qom: Drop parameter @errp of object_property_add() & friends
- qom: Put name parameter before value / visitor parameter
See the following commits for more info:
- audio: rework pcspk_init()
- isa: Convert uses of isa_create() with Coccinelle
- audio: create pcspk device early
When a coprocessor instruction in an AArch32 guest traps to AArch32
Hyp mode, the syndrome register (HSR) includes Rt and Rt2 fields
which are simply copies of the Rt and Rt2 fields from the trapped
instruction. However, if the instruction is trapped from AArch32 to
an AArch64 higher exception level, the Rt and Rt2 fields in the
syndrome register (ESR_ELx) must be the AArch64 view of the register.
This makes a difference if the AArch32 guest was in a mode other than
User or System and it was using r13 or r14, or if it was in FIQ mode
and using r8-r14.
We don't know at translate time which AArch32 CPU mode we are in, so
we leave the values we generate in our prototype syndrome register
value at translate time as the raw Rt/Rt2 from the instruction, and
instead correct them to the AArch64 view when we find we need to take
an exception from AArch32 to AArch64 with one of these syndrome
values.
Fixes: https://bugs.launchpad.net/qemu/+bug/1879587
Reported-by: Julien Freche <julien@bedrocksystems.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20200804193903.31240-1-peter.maydell@linaro.org
Matt Borgerson