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Christoffer Dall 6180cbd477
util: align memory allocations to 2M on AArch64 
For KVM to use Transparent Huge Pages (THP) we have to ensure that the
alignment of the userspace address of the KVM memory slot and the IPA
that the guest sees for a memory region have the same offset from the 2M
huge page size boundary.

One way to achieve this is to always align the IPA region at a 2M
boundary and ensure that the mmap alignment is also at 2M.

Unfortunately, we were only doing this for __arm__, not for __aarch64__,
so add this simple condition.

This fixes a performance regression using KVM/ARM on AArch64 platforms
that showed a performance penalty of more than 50%, introduced by the
following commit:

9fac18f (oslib: allocate PROT_NONE pages on top of RAM, 2015-09-10)

We were only lucky before the above commit, because we were allocating
large regions and naturally getting a 2M alignment on those allocations
then.

Backports commit ee1e0f8e5d3682c561edcdceccff72b9d9b16d8b from qemu
2018-02-23 13:56:59 -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: clarify memory region lifecycle 2018-02-12 15:11:21 -05:00
fpu fpu: silence warnings 2018-02-22 09:52:28 -05:00
hw util: move declarations out of qemu-common.h 2018-02-22 09:25:48 -05:00
include exec-all: Remove externs 2018-02-23 12:43:03 -05:00
qapi include/qemu/osdep.h: Don't include qapi/error.h 2018-02-21 23:08:18 -05:00
qobject util: move declarations out of qemu-common.h 2018-02-22 09:25:48 -05:00
qom util: move declarations out of qemu-common.h 2018-02-22 09:25:48 -05:00
scripts include/qemu/osdep.h: Don't include qapi/error.h 2018-02-21 23:08:18 -05:00
target-arm target-arm: Get rid of unused variable warnings 2018-02-23 12:43:09 -05:00
target-i386 target-i386: check for PKU even for non-writable pages 2018-02-23 13:23:37 -05:00
target-m68k include/qemu/osdep.h: Don't include qapi/error.h 2018-02-21 23:08:18 -05:00
target-mips target-mips: indicate presence of IEEE 754-2008 FPU in R6/R5+MSA CPUs 2018-02-22 11:30:08 -05:00
target-sparc target-sparc: fix Trap Based Address Register behavior for sparc64 2018-02-23 13:39:59 -05:00
tcg tcg: check for CONFIG_DEBUG_TCG instead of NDEBUG 2018-02-23 13:55:21 -05:00
util util: align memory allocations to 2M on AArch64 2018-02-23 13:56:59 -05:00
aarch64.h cputlb: move CPU_LOOP() for tlb_reset() to exec.c 2018-02-23 10:46:31 -05:00
aarch64eb.h cputlb: move CPU_LOOP() for tlb_reset() to exec.c 2018-02-23 10:46:31 -05:00
accel.c all: Clean up includes 2018-02-19 01:34:28 -05:00
arm.h cputlb: move CPU_LOOP() for tlb_reset() to exec.c 2018-02-23 10:46:31 -05:00
armeb.h cputlb: move CPU_LOOP() for tlb_reset() to exec.c 2018-02-23 10:46:31 -05:00
CODING_STYLE import 2015-08-21 15:04:50 +08:00
configure config.status: Pass extra parameters 2018-02-22 10:12:54 -05:00
COPYING import 2015-08-21 15:04:50 +08:00
COPYING.LIB import 2015-08-21 15:04:50 +08:00
cpu-exec-common.c exec: Clean up includes 2018-02-19 00:49:55 -05:00
cpu-exec.c qemu-log: dfilter-ise exec, out_asm, op and opt_op 2018-02-22 10:06:19 -05:00
cpus.c exec: Clean up includes 2018-02-19 00:49:55 -05:00
cputlb.c cputlb: move CPU_LOOP() for tlb_reset() to exec.c 2018-02-23 10:46:31 -05:00
exec.c include/exec: Move cputlb exec.c defs out 2018-02-23 10:52:25 -05:00
gen_all_header.sh arm64eb: add support for ARM64 big endian. 2017-04-24 23:30:01 +08:00
glib_compat.c glib_compat: backport hashtable iterator interfaces 2018-02-21 13:18:44 -05:00
HACKING import 2015-08-21 15:04:50 +08:00
header_gen.py cputlb: move CPU_LOOP() for tlb_reset() to exec.c 2018-02-23 10:46:31 -05:00
ioport.c all: Clean up includes 2018-02-19 01:34:28 -05:00
LICENSE import 2015-08-21 15:04:50 +08:00
m68k.h cputlb: move CPU_LOOP() for tlb_reset() to exec.c 2018-02-23 10:46:31 -05:00
Makefile qapi: Turn generators' mandatory option -i into an argument 2018-02-19 15:22:27 -05:00
Makefile.objs crypto: move crypto objects out of libqemuutil.la 2018-02-17 15:23:50 -05:00
Makefile.target tcg: split tcg_op_defs to -common 2018-02-17 15:23:51 -05:00
memory.c include/qemu/osdep.h: Don't include qapi/error.h 2018-02-21 23:08:18 -05:00
memory_mapping.c include/qemu/osdep.h: Don't include qapi/error.h 2018-02-21 23:08:18 -05:00
mips.h cputlb: move CPU_LOOP() for tlb_reset() to exec.c 2018-02-23 10:46:31 -05:00
mips64.h cputlb: move CPU_LOOP() for tlb_reset() to exec.c 2018-02-23 10:46:31 -05:00
mips64el.h cputlb: move CPU_LOOP() for tlb_reset() to exec.c 2018-02-23 10:46:31 -05:00
mipsel.h cputlb: move CPU_LOOP() for tlb_reset() to exec.c 2018-02-23 10:46:31 -05:00
powerpc.h cputlb: move CPU_LOOP() for tlb_reset() to exec.c 2018-02-23 10:46:31 -05:00
qapi-schema.json qapi: Lazy creation of array types 2018-02-19 18:55:35 -05:00
qemu-log.c log: move qemu_log_close/qemu_log_flush from header to log.c 2018-02-22 11:13:17 -05:00
qemu-timer.c all: Clean up includes 2018-02-19 01:34:28 -05:00
rules.mak import 2015-08-21 15:04:50 +08:00
softmmu_template.h exec.c: Pass MemTxAttrs to iotlb_to_region so it uses the right AS 2018-02-17 23:19:00 -05:00
sparc.h cputlb: move CPU_LOOP() for tlb_reset() to exec.c 2018-02-23 10:46:31 -05:00
sparc64.h cputlb: move CPU_LOOP() for tlb_reset() to exec.c 2018-02-23 10:46:31 -05:00
tcg-runtime.c all: Clean up includes 2018-02-19 01:34:28 -05:00
translate-all.c translate-all: add missing fold of tb_ctx into tcg_ctx 2018-02-23 13:35:42 -05:00
translate-all.h translate-all: remove unnecessary argument to tb_invalidate_phys_range 2018-02-13 09:04:51 -05:00
translate-common.c exec: Clean up includes 2018-02-19 00:49:55 -05:00
unicorn_common.h qom/cpu: Add MemoryRegion property 2018-02-18 21:54:50 -05:00
VERSION import 2015-08-21 15:04:50 +08:00
vl.c util: move declarations out of qemu-common.h 2018-02-22 09:25:48 -05:00
vl.h import 2015-08-21 15:04:50 +08:00
x86_64.h cputlb: move CPU_LOOP() for tlb_reset() to exec.c 2018-02-23 10:46:31 -05:00