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Preliminary macOS support for nocc mode #1101

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Merged
stefano-garzarella merged 2 commits into from
Jun 4, 2026
+4 −2
Merged

Preliminary macOS support for nocc mode #1101

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2e88901
scripts/launch_guest: use `memory-backend-ram` for nocc mode
luigix25 Jun 3, 2026
9820192
scripts/launch_guest: replace grep -P with portable sed
luigix25 Jun 3, 2026
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6 changes: 4 additions & 2 deletions scripts/launch_guest.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,7 @@ CPU=EPYC-v4
ACCEL=kvm
IGVM_OBJ=""
SNAPSHOT="on"
MEMORY_SIZE="8G"

STATE_DEVICE=""
VSOCK_DEVICE=""
Expand Down Expand Up @@ -123,7 +124,7 @@ fi
KERNEL_VERSION=$(uname -r)

# Split the QEMU version number so we can specify the correct parameters
QEMU_VERSION=$($QEMU --version | grep -Po '(?<=version )[^ ]+')
QEMU_VERSION=$($QEMU --version | sed -n 's/.*version \([^ ]*\).*/\1/p')
QEMU_MAJOR=${QEMU_VERSION%%.*}
QEMU_BUILD=${QEMU_VERSION##*.}
QEMU_MINOR=${QEMU_VERSION##"$QEMU_MAJOR".}
Expand All @@ -138,13 +139,15 @@ case "$CGS" in
nocc)
SNP_GUEST=""
CPU=max,smep=on
MEMORY=memory-backend-ram,size=$MEMORY_SIZE,id=mem0,prealloc=false
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if (( QEMU_MAJOR < 11 )); then
ACCEL=tcg
SNP_GUEST="-object nocc,id=cgs0"
fi
;;
sev)
SNP_GUEST="-object sev-snp-guest,id=cgs0,cbitpos=$C_BIT_POS,reduced-phys-bits=$REDUCED_PHYS_BITS"
MEMORY=memory-backend-memfd,size=$MEMORY_SIZE,id=mem0,share=true,prealloc=false,reserve=false
;;
*)
echo "Error: Unexpected CGS value '$CGS'"
Expand All @@ -154,7 +157,6 @@ MACHINE=q35,memory-backend=mem0,igvm-cfg=igvm0,accel=$ACCEL
[ -n "$SNP_GUEST" ] && MACHINE+=",confidential-guest-support=cgs0"
[ -n "$VIRTIO_ENABLE" ] && MACHINE+=",${VIRTIO_ENABLE}"

MEMORY=memory-backend-memfd,size=8G,id=mem0,share=true,prealloc=false,reserve=false
IGVM_OBJ="-object igvm-cfg,id=igvm0,file=$IGVM"

# Setup a disk if an image has been specified
Expand Down