> From: Shaoqin Huang <shahu...@redhat.com> > Sent: Monday, June 26, 2023 7:49 AM > To: qemu-devel@nongnu.org; qemu-...@nongnu.org > Cc: oliver.up...@linux.dev; Salil Mehta <salil.me...@huawei.com>; > james.mo...@arm.com; gs...@redhat.com; Shaoqin Huang <shahu...@redhat.com>; > Cornelia Huck <coh...@redhat.com>; k...@vger.kernel.org; Michael S. Tsirkin > <m...@redhat.com>; Paolo Bonzini <pbonz...@redhat.com>; Peter Maydell > <peter.mayd...@linaro.org> > Subject: [PATCH v1 0/5] target/arm: Handle psci calls in userspace > > The userspace SMCCC call filtering[1] provides the ability to forward the > SMCCC > calls to the userspace. The vCPU hotplug[2] would be the first legitimate use > case to handle the psci calls in userspace, thus the vCPU hotplug can deny the > PSCI_ON call if the vCPU is not present now. > > This series try to enable the userspace SMCCC call filtering, thus can handle > the SMCCC call in userspace. The first enabled SMCCC call is psci call, by > using > the new added option 'user-smccc', we can enable handle psci calls in > userspace. > > qemu-system-aarch64 -machine virt,user-smccc=on > > This series reuse the qemu implementation of the psci handling, thus the > handling process is very simple. But when handling psci in userspace when > using > kvm, the reset vcpu process need to be taking care, the detail is included in > the patch05.
This change in intended for VCPU Hotplug and we are duplicating the code we are working on. Unless this change is also intended for any other feature I would request you to defer this. Thanks Salil
