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unicorn/qemu
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Peter Maydell 8d34a271f6
target/arm: Implement tailchaining for M profile cores 
Tailchaining is an optimization in handling of exception return
for M-profile cores: if we are about to pop the exception stack
for an exception return, but there is a pending exception which
is higher priority than the priority we are returning to, then
instead of unstacking and then immediately taking the exception
and stacking registers again, we can chain to the pending
exception without unstacking and stacking.

For v6M and v7M it is IMPDEF whether tailchaining happens for pending
exceptions; for v8M this is architecturally required. Implement it
in QEMU for all M-profile cores, since in practice v6M and v7M
hardware implementations generally do have it.

(We were already doing tailchaining for derived exceptions which
happened during exception return, like the validity checks and
stack access failures; these have always been required to be
tailchained for all versions of the architecture.)

Backports commit 5f62d3b9e67bfc3deb970e3c7fb7df7e57d46fc3 from qemu
2018-08-16 07:03:51 -04:00
..
accel accel/tcg: Correct "is this a TLB miss" check in get_page_addr_code() 2018-07-03 19:23:25 -04:00
crypto crypto: Clean up includes 2018-02-19 00:47:40 -05:00
default-configs arm64eb: add support for ARM64 big endian. 2017-04-24 23:30:01 +08:00
docs docs: clarify memory region lifecycle 2018-02-12 15:11:21 -05:00
fpu fpu/softfloat: Define floatN_silence_nan in terms of parts_silence_nan 2018-05-20 00:13:42 -04:00
hw Use cpu_create(type) instead of cpu_init(cpu_model) 2018-03-20 14:20:30 -04:00
include qstring: Fix qstring_from_substr() not to provoke int overflow 2018-08-02 21:21:51 -04:00
qapi qobject: Modify qobject_ref() to return obj 2018-05-04 10:24:10 -04:00
qobject qstring: Move qstring_from_substr()'s @end one to the right 2018-08-02 21:24:19 -04:00
qom qobject: Replace qobject_incref/QINCREF qobject_decref/QDECREF 2018-05-04 10:16:07 -04:00
scripts Revert "Makefile: Rename TARGET_DIRS to TARGET_LIST" 2018-07-05 17:40:24 -04:00
target target/arm: Implement tailchaining for M profile cores 2018-08-16 07:03:51 -04:00
tcg tcg/optimize: Do not skip default processing of dup_vec 2018-08-09 00:53:07 -04:00
util i386: Fix up the Node id for CPUID_8000_001E 2018-07-03 00:31:38 -04:00
aarch64.h target/arm: Implement SVE dot product (indexed) 2018-07-03 04:42:41 -04:00
aarch64eb.h target/arm: Implement SVE dot product (indexed) 2018-07-03 04:42:41 -04:00
accel.c clean-up: removed duplicate #includes 2018-02-28 08:51:56 -05:00
arm.h target/arm: Implement SVE dot product (indexed) 2018-07-03 04:42:41 -04:00
armeb.h target/arm: Implement SVE dot product (indexed) 2018-07-03 04:42:41 -04:00
CODING_STYLE
configure Revert "Makefile: Rename TARGET_DIRS to TARGET_LIST" 2018-07-05 17:40:24 -04:00
COPYING
COPYING.LIB
cpus.c Include qapi/error.h exactly where needed 2018-03-07 12:26:38 -05:00
exec.c exec: Fix MAP_RAM for cached access 2018-07-03 01:11:12 -04:00
gen_all_header.sh arm64eb: add support for ARM64 big endian. 2017-04-24 23:30:01 +08:00
glib_compat.c Use cpu_create(type) instead of cpu_init(cpu_model) 2018-03-20 14:20:30 -04:00
HACKING HACKING: document preference for g_new instead of g_malloc 2018-05-22 00:30:50 -04:00
header_gen.py target/arm: Implement SVE dot product (indexed) 2018-07-03 04:42:41 -04:00
ioport.c hw: remove pio_addr_t 2018-02-24 02:43:16 -05:00
LICENSE
m68k.h target/arm: Implement SVE dot product (indexed) 2018-07-03 04:42:41 -04:00
Makefile Revert "Makefile: Rename TARGET_DIRS to TARGET_LIST" 2018-07-05 17:40:24 -04:00
Makefile.objs qapi: Move qapi-schema.json to qapi/, rename generated files 2018-03-09 11:35:11 -05:00
Makefile.target tcg: remove softfloat from --disable-tcg builds 2018-06-07 11:49:35 -04:00
memory.c memory: Protect against use-after-free 2018-03-21 09:40:33 -04:00
memory_ldst.inc.c exec: Fix MAP_RAM for cached access 2018-07-03 01:11:12 -04:00
memory_mapping.c include/qemu/osdep.h: Don't include qapi/error.h 2018-02-21 23:08:18 -05:00
mips.h target/arm: Implement SVE dot product (indexed) 2018-07-03 04:42:41 -04:00
mips64.h target/arm: Implement SVE dot product (indexed) 2018-07-03 04:42:41 -04:00
mips64el.h target/arm: Implement SVE dot product (indexed) 2018-07-03 04:42:41 -04:00
mipsel.h target/arm: Implement SVE dot product (indexed) 2018-07-03 04:42:41 -04:00
powerpc.h target/arm: Implement SVE dot product (indexed) 2018-07-03 04:42:41 -04:00
qemu-timer.c timer/cpus: fix some typos and update some comments 2018-02-25 23:21:57 -05:00
rules.mak build-sys: silence make by default or V=0 2018-03-06 08:58:03 -05:00
sparc.h target/arm: Implement SVE dot product (indexed) 2018-07-03 04:42:41 -04:00
sparc64.h target/arm: Implement SVE dot product (indexed) 2018-07-03 04:42:41 -04:00
unicorn_common.h cpu: Convert cpu_index into a bitmap 2018-03-21 08:06:07 -04:00
VERSION Open 3.1 development tree 2018-08-16 06:33:25 -04:00
vl.c Use cpu_create(type) instead of cpu_init(cpu_model) 2018-03-20 14:20:30 -04:00
vl.h
x86_64.h target/arm: Implement SVE dot product (indexed) 2018-07-03 04:42:41 -04:00