From: Vincent Donnefort <vdonnefort@google.com>
To: kvmarm@lists.linux.dev, maz@kernel.org, broonie@kernel.org
Cc: catalin.marinas@arm.com, will@kernel.org
Subject: Hang with nVHE mode and SME
Date: Wed, 26 Oct 2022 15:29:44 +0100 [thread overview]
Message-ID: <Y1lEWJ7rO4m1CKWL@google.com> (raw)
Hi All,
I'm experiencing hangs when running a guest on a Qemu platform and a host
started with nVHE mode.
The hang occurs in
static void __activate_traps(struct kvm_vcpu *vcpu)
{
...
if (cpus_have_final_cap(ARM64_SME)) {
// HANG !
No problem though with either VHE or if the host boots with arm64.nosme.
The host (and the guest) are 6.1-rc1. My Qemu is 7.1.
My Qemu setup:
$ qemu-system-aarch64 \
-M virt \
-machine virtualization=true -machine virt,gic-version=3 \
-cpu max,pauth=off -smp 1 -m 16384 \
-drive file=rootfs.ext4,if=none,format=raw,id=hd0 \
-device virtio-blk-device,drive=hd0 \
-object rng-random,filename=/dev/urandom,id=rng0 \
-netdev user,id=eth0,hostfwd=tcp::8022-:22,hostfwd=tcp::1234-:1234 \
-device virtio-net-pci,netdev=eth0 \
-nographic \
-kernel arm64/boot/Image -append "earlycon root=/dev/vda kvm-arm.mode=nvhe nokaslr" \
The guest is run with kvm-tools:
$ lkvm run -p "break=mount arm64.nosme" -k ~/Image --force-pci
Is it a known issue?
--
Vincent
next reply other threads:[~2022-10-26 14:29 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-26 14:29 Vincent Donnefort [this message]
2022-10-26 15:07 ` Hang with nVHE mode and SME Mark Brown
2022-10-26 16:13 ` Marc Zyngier
2022-10-26 16:34 ` Mark Brown
2022-10-27 9:44 ` Peter Maydell
2022-10-27 12:01 ` Mark Brown
2022-10-27 21:16 ` Richard Henderson
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