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Peter Maydell 1301becdab
tcg: Support MMU protection regions smaller than TARGET_PAGE_SIZE 
Add support for MMU protection regions that are smaller than
TARGET_PAGE_SIZE. We do this by marking the TLB entry for those
pages with a flag TLB_RECHECK. This flag causes us to always
take the slow-path for accesses. In the slow path we can then
special case them to always call tlb_fill() again, so we have
the correct information for the exact address being accessed.

This change allows us to handle reading and writing from small
regions; we cannot deal with execution from the small region.

Backports commit 55df6fcf5476b44bc1b95554e686ab3e91d725c5 from qemu
2018-11-16 21:35:54 -05:00
..
accel tcg: Support MMU protection regions smaller than TARGET_PAGE_SIZE 2018-11-16 21:35:54 -05:00
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/devel/memory.txt: Document _with_attrs accessors 2018-10-04 04:46:26 -04:00
fpu softfloat: Don't execute divdeu without power7 2018-11-11 08:33:46 -05:00
hw hw/mips/mips_r4k: Fix initialization of MIPS target CPUs 2018-09-03 17:40:08 -04:00
include tcg: Support MMU protection regions smaller than TARGET_PAGE_SIZE 2018-11-16 21:35:54 -05:00
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 tcg: access cpu->icount_decr.u16.high with atomics 2018-10-23 14:36:46 -04:00
scripts decodetree: Allow multiple input files 2018-11-11 08:28:55 -05:00
target m68k: Silence compiler warnings 2018-11-16 21:23:55 -05:00
tcg tcg/tcg-op.h: Add multiple include guard 2018-11-11 08:51:51 -05:00
util Haiku support patches (#989) 2018-09-03 07:55:51 -04:00
aarch64.h memory: learn about non-volatile memory region 2018-11-11 08:50:39 -05:00
aarch64eb.h memory: learn about non-volatile memory region 2018-11-11 08:50:39 -05:00
accel.c clean-up: removed duplicate #includes 2018-02-28 08:51:56 -05:00
arm.h memory: learn about non-volatile memory region 2018-11-11 08:50:39 -05:00
armeb.h memory: learn about non-volatile memory region 2018-11-11 08:50:39 -05:00
CODING_STYLE import 2015-08-21 15:04:50 +08:00
configure tcg: Split CONFIG_ATOMIC128 2018-10-23 15:17:39 -04:00
COPYING import 2015-08-21 15:04:50 +08:00
COPYING.LIB import 2015-08-21 15:04:50 +08:00
cpus.c Include qapi/error.h exactly where needed 2018-03-07 12:26:38 -05:00
exec.c Partial backport of: exec.c: Handle IOMMUs in address_space_translate_for_iotlb() 2018-11-16 21:24:55 -05:00
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 memory: learn about non-volatile memory region 2018-11-11 08:50:39 -05:00
ioport.c hw: remove pio_addr_t 2018-02-24 02:43:16 -05:00
LICENSE import 2015-08-21 15:04:50 +08:00
m68k.h memory: learn about non-volatile memory region 2018-11-11 08:50:39 -05:00
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: learn about non-volatile memory region 2018-11-11 08:50:39 -05:00
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 memory: learn about non-volatile memory region 2018-11-11 08:50:39 -05:00
mips64.h memory: learn about non-volatile memory region 2018-11-11 08:50:39 -05:00
mips64el.h memory: learn about non-volatile memory region 2018-11-11 08:50:39 -05:00
mipsel.h memory: learn about non-volatile memory region 2018-11-11 08:50:39 -05:00
powerpc.h memory: learn about non-volatile memory region 2018-11-11 08:50:39 -05:00
qemu-timer.c timer/cpus: fix some typos and update some comments 2018-02-25 23:21:57 -05:00
riscv32.h target/arm: Add v8M stack checks on ADD/SUB/MOV of SP 2018-10-08 14:15:15 -04:00
riscv64.h target/arm: Add v8M stack checks on ADD/SUB/MOV of SP 2018-10-08 14:15:15 -04:00
rules.mak build-sys: silence make by default or V=0 2018-03-06 08:58:03 -05:00
sparc.h memory: learn about non-volatile memory region 2018-11-11 08:50:39 -05:00
sparc64.h memory: learn about non-volatile memory region 2018-11-11 08:50:39 -05:00
unicorn_common.h unicorn_common: Fix unicorn memory functions failing 2018-09-03 10:40:14 -04:00
VERSION Update version for v3.1.0-rc0 release 2018-11-11 08:40:14 -05:00
vl.c Use cpu_create(type) instead of cpu_init(cpu_model) 2018-03-20 14:20:30 -04:00
vl.h import 2015-08-21 15:04:50 +08:00
x86_64.h memory: learn about non-volatile memory region 2018-11-11 08:50:39 -05:00