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qemu-cr16/util
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TANG Tiancheng f7230e09b1 util: Add RISC-V vector extension probe in cpuinfo 
Add support for probing RISC-V vector extension availability in
the backend. This information will be used when deciding whether
to use vector instructions in code generation.

Cache lg2(vlenb) for the backend. The storing of lg2(vlenb) means
we can convert all of the division into subtraction.

While the compiler doesn't support RISCV_HWPROBE_EXT_ZVE64X,
we use RISCV_HWPROBE_IMA_V instead. RISCV_HWPROBE_IMA_V is more
strictly constrainted than RISCV_HWPROBE_EXT_ZVE64X. At least in
current QEMU implemenation, the V vector extension depends on the
zve64d extension.

Signed-off-by: TANG Tiancheng <tangtiancheng.ttc@alibaba-inc.com>
Reviewed-by: Liu Zhiwei <zhiwei_liu@linux.alibaba.com>
Tested-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Message-ID: <20241007025700.47259-2-zhiwei_liu@linux.alibaba.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-10-22 11:57:25 -07:00
..
aio-posix.c include: Move QemuLockCnt APIs to their own header 2024-10-15 15:16:17 +01:00
aio-posix.h
aio-wait.c
aio-win32.c include: Move QemuLockCnt APIs to their own header 2024-10-15 15:16:17 +01:00
aiocb.c
async.c include: Move QemuLockCnt APIs to their own header 2024-10-15 15:16:17 +01:00
atomic64.c
base64.c
bitmap.c
bitops.c
block-helpers.c block: Adjust check_block_size() signature 2024-10-18 15:03:35 +02:00
block-helpers.h block: Adjust check_block_size() signature 2024-10-18 15:03:35 +02:00
buffer.c
bufferiszero.c util/bufferiszero: Split out host include files 2024-06-19 12:47:11 -07:00
cacheflush.c
chardev_open.c util/char_dev: Add open_cdev() 2023-12-19 19:03:38 +01:00
compatfd.c
coroutine-sigaltstack.c osdep: set _FORTIFY_SOURCE=2 when optimization is enabled 2023-10-04 09:52:06 -04:00
coroutine-ucontext.c coroutine-ucontext: Save fake stack for pooled coroutine 2024-01-22 11:00:12 -05:00
coroutine-windows.c
cpuinfo-aarch64.c util/cpuinfo: Make use of elf_aux_info(3) on OpenBSD 2024-07-30 07:59:23 +10:00
cpuinfo-i386.c Revert "host/i386: assume presence of SSE2" 2024-06-28 14:44:51 +02:00
cpuinfo-loongarch.c util/loongarch64: Detect LASX vector support 2024-06-19 10:55:12 -07:00
cpuinfo-ppc.c util/cpuinfo: Make use of elf_aux_info(3) on OpenBSD 2024-07-30 07:59:23 +10:00
cpuinfo-riscv.c util: Add RISC-V vector extension probe in cpuinfo 2024-10-22 11:57:25 -07:00
crc-ccitt.c
crc32c.c
cutils.c util/cutils: Remove unused qemu_get_exec_dir 2024-09-20 10:04:34 +03:00
dbus.c
defer-call.c util/defer-call: move defer_call() to util/ 2023-10-31 15:41:42 +01:00
drm.c
envlist.c envlist: Remove unused envlist_parse 2024-09-20 10:00:27 +03:00
error-report.c Remove glib compatibility code that is not required anymore 2024-05-14 12:46:39 +02:00
error.c
event_notifier-posix.c
event_notifier-win32.c
fdmon-epoll.c include: Move QemuLockCnt APIs to their own header 2024-10-15 15:16:17 +01:00
fdmon-io_uring.c remove unnecessary casts from uintptr_t 2024-01-18 10:43:51 +01:00
fdmon-poll.c
fifo8.c fifo8: introduce fifo8_peek() function 2024-09-13 20:11:13 +02:00
filemonitor-inotify.c util/filemonitor-inotify.c: spelling fix: kenel 2023-11-15 12:06:05 +03:00
filemonitor-stub.c
getauxval.c util/cpuinfo: Make use of elf_aux_info(3) on OpenBSD 2024-07-30 07:59:23 +10:00
guest-random.c util/guest-random: Clean up global variable shadowing 2023-10-06 13:27:48 +02:00
hbitmap.c qapi/crypto: Rename QCryptoHashAlgorithm to *Algo, and drop prefix 2024-09-10 14:02:16 +02:00
hexdump.c util/hexdump: Inline g_string_append_printf "%02x" 2024-06-05 12:14:20 -07:00
host-utils.c
id.c
int128.c
interval-tree.c util/interval-tree: Check root for null in interval_tree_iter_first 2023-08-09 09:26:32 -07:00
iov.c util/iov: Introduce iov_send_recv_with_flags() 2024-10-10 12:33:31 +01:00
iova-tree.c util/iova-tree: Remove deadcode 2024-10-08 15:28:55 -04:00
keyval.c
lockcnt.c include: Move QemuLockCnt APIs to their own header 2024-10-15 15:16:17 +01:00
log.c plugins: Replace pr_ops with a proper debug dump flag 2024-04-30 16:12:05 -07:00
main-loop.c system/cpus: rename qemu_mutex_lock_iothread() to bql_lock() 2024-01-08 10:45:43 -05:00
memalign.c
memfd.c util/memfd: report potential errors on free 2024-10-14 17:34:09 +04:00
meson.build util/cpuinfo-riscv: Support host/cpuinfo.h for riscv 2024-07-03 10:24:12 -07:00
mmap-alloc.c
module.c module: Prevent crash by resetting local_err in module_load_qom_all() 2024-08-13 16:35:47 +02:00
notify.c notify: pass error to notifier with return 2024-02-28 11:31:28 +08:00
nvdimm-utils.c
osdep.c migration: Add direct-io parameter 2024-06-21 09:47:22 -03:00
oslib-posix.c qemu/osdep: Add excluded fd parameter to qemu_close_all_open_fd() 2024-08-05 08:21:59 +10:00
oslib-win32.c oslib-posix: initialize backend memory objects in parallel 2024-02-06 08:15:22 +01:00
path.c
qdist.c util: spelling fixes 2023-08-31 19:47:43 +02:00
qemu-co-shared-resource.c util/co-shared-resource: Remove unused co_try_get_from_shres 2024-09-30 10:53:18 +03:00
qemu-co-timeout.c
qemu-config.c util/qemu-config: Extract QMP commands to qemu-config-qmp.c 2024-04-18 11:17:27 +02:00
qemu-coroutine-io.c
qemu-coroutine-lock.c
qemu-coroutine-sleep.c
qemu-coroutine.c util/coroutine: fix -Werror=maybe-uninitialized false-positive 2024-10-02 16:14:29 +04:00
qemu-option.c qapi: Inline and remove QERR_INVALID_PARAMETER definition 2024-04-24 09:50:58 +02:00
qemu-print.c
qemu-progress.c
qemu-sockets.c qapi: Improve documentation of file descriptor socket addresses 2024-02-12 10:04:32 +01:00
qemu-thread-common.h
qemu-thread-posix.c
qemu-thread-win32.c
qemu-timer-common.c
qemu-timer.c -Werror=maybe-uninitialized fixes 2024-10-03 10:32:54 +01:00
qht.c
qsp.c system/cpus: rename qemu_mutex_lock_iothread() to bql_lock() 2024-01-08 10:45:43 -05:00
qtree.c
range.c util/range.c: spelling fix: inbetween 2023-11-15 12:06:05 +03:00
rcu.c Replace "iothread lock" with "BQL" in comments 2024-01-08 10:45:43 -05:00
readline.c util/readline: Add C-u shortcut 2024-06-19 12:42:03 +02:00
reserved-region.c util/reserved-region: Add new ReservedRegion helpers 2023-11-03 09:20:31 +01:00
selfmap.c util/selfmap: Use dev_t and ino_t in MapInfo 2023-09-01 13:34:03 -07:00
stats64.c
sys_membarrier.c
systemd.c
thread-context.c
thread-pool.c virtio: use defer_call() in virtio_irqfd_notify() 2023-10-31 15:42:14 +01:00
throttle.c throttle: use THROTTLE_MAX/ARRAY_SIZE for hard code 2023-08-29 10:49:24 +02:00
timed-average.c license: Simplify GPL-2.0-or-later license descriptions 2024-09-20 10:11:59 +03:00
trace-events
trace.h
transactions.c
unicode.c
userfaultfd.c util/userfaultfd: Remove unused uffd_poll_events 2024-10-08 15:28:55 -04:00
uuid.c util/uuid: Add UUID_STR_LEN definition 2023-11-03 09:20:31 +01:00
vfio-helpers.c
vhost-user-server.c vhost-user-server: do not set memory fd non-blocking 2024-07-02 09:27:56 -04:00
yank.c qapi: Fix dangling references to docs/devel/qapi-code-gen.txt 2024-01-26 07:04:53 +01:00