Messages in this thread | | | Date | Thu, 3 Feb 2022 19:25:27 +0100 | From | Frederic Weisbecker <> | Subject | Re: [patch v10 08/10] KVM: x86: process isolation work from VM-entry code path |
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On Thu, Jan 27, 2022 at 02:30:45PM -0300, Marcelo Tosatti wrote: > VM-entry code path is an entry point similar to userspace return > when task isolation is concerned. > > Call isolation_exit_to_user_mode before VM-enter. > > Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> > > --- > include/linux/entry-kvm.h | 4 +++- > kernel/entry/kvm.c | 18 ++++++++++++++---- > 2 files changed, 17 insertions(+), 5 deletions(-) > > Index: linux-2.6/kernel/entry/kvm.c > =================================================================== > --- linux-2.6.orig/kernel/entry/kvm.c > +++ linux-2.6/kernel/entry/kvm.c > @@ -2,8 +2,11 @@ > > #include <linux/entry-kvm.h> > #include <linux/kvm_host.h> > +#include <linux/task_isolation.h> > > -static int xfer_to_guest_mode_work(struct kvm_vcpu *vcpu, unsigned long ti_work) > +static int xfer_to_guest_mode_work(struct kvm_vcpu *vcpu, > + unsigned long ti_work, > + unsigned long task_isol_work) > { > do { > int ret; > @@ -25,15 +28,19 @@ static int xfer_to_guest_mode_work(struc > ret = arch_xfer_to_guest_mode_handle_work(vcpu, ti_work); > if (ret) > return ret; > + if (task_isol_work) > + task_isol_exit_to_user_mode(); > > ti_work = read_thread_flags(); > - } while (ti_work & XFER_TO_GUEST_MODE_WORK || need_resched()); > + } while (ti_work & XFER_TO_GUEST_MODE_WORK || need_resched() || > + task_isol_work);
There too you should join the XFER_TO_GUEST_MODE_WORK mask.
Thanks.
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