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[lldb][AArch64] Add Scalable Matrix Extension option to QEMU launch script

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The Scalable Matrix Extension (SME) does not require extra options
beyond setting the cpu to "max".

https://qemu-project.gitlab.io/qemu/system/arm/cpu-features.html#sme-cpu-property-examples

SME depends on SVE, so that will be enabled too even if you don't ask
for it by name.

--sve --sme -> SVE and SME
--sme       -> SVE and SME
--sve       -> Only SVE

Reviewed By: omjavaid

Differential Revision: https://reviews.llvm.org/D152519
This commit is contained in:
David Spickett 2023-06-06 09:18:12 +01:00
parent ffa2bbc7f4
commit 01e30b30d0
2 changed files with 13 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
lldb/docs/use/qemu-testing.rst
View File

@ -93,8 +93,11 @@ run-qemu.sh has following dependencies:
* --sve option will enable AArch64 SVE mode.
* --mte option will enable AArch64 MTE (memory tagging) mode.
(can be used on its own or in addition to --sve)
* --sme option will enable AArch64 SME mode (SME requires SVE, so this will also
be enabled).
* --mte option will enable AArch64 MTE (memory tagging) mode
(can be used on its own or in addition to --sve).
**Example:** Run QEMU Arm or AArch64 system emulation using run-qemu.sh

11
lldb/scripts/lldb-test-qemu/run-qemu.sh
View File

@ -6,7 +6,8 @@ print_usage() {
echo -e " --help\t\t\tDisplay this information."
echo -e " --arch {arm|arm64}\t\tSelects architecture QEMU system emulation."
echo -e " --sve\t\t\t\tEnables AArch64 SVE mode."
echo -e " --mte\t\t\t\tEnables AArch64 MTE mode.\n"
echo -e " --mte\t\t\t\tEnables AArch64 MTE mode."
echo -e " --sme\t\t\t\tEnables AArch64 SME mode."
echo -e " --rootfs {path}\t\tPath of root file system image."
echo -e " --qemu {path}\t\t\tPath of pre-installed qemu-system-* executable."
echo -e " --kernel {path}\t\tPath of Linux kernel prebuilt image.\n"
@ -50,6 +51,7 @@ while [[ $# -gt 0 ]]; do
--qemu) QEMU_BIN=$2; shift;;
--sve) SVE=1;;
--mte) MTE=1;;
--sme) SME=1;;
--help) print_usage 0 ;;
*) invalid_arg "$1" ;;
esac
@ -104,16 +106,19 @@ if [[ "$ARCH" == "arm" ]]; then
if [[ $MTE ]]; then
echo "warning: --mte is supported by AArch64 targets only"
fi
if [[ $SME ]]; then
echo "warning: --sme is supported by AArch64 targets only"
fi
elif [[ "$ARCH" == "arm64" ]]; then
QEMU_MACHINE=virt
QEMU_SVE_MAX_VQ=4
QEMU_CPU="cortex-a53"
if [[ $SVE ]] || [[ $MTE ]]; then
if [[ $SVE ]] || [[ $MTE ]] || [[ $SME ]]; then
QEMU_CPU="max"
fi
if [[ $SVE ]]; then
if [[ $SVE ]] || [[ $SME ]]; then
QEMU_CPU="$QEMU_CPU,sve-max-vq=$QEMU_SVE_MAX_VQ"
fi
if [[ $MTE ]]; then