Messages in this thread | | | From | Thomas Gleixner <> | Subject | Re: [PATCH 01/19] x86/fpu: Extend prctl() with guest permissions | Date | Tue, 14 Dec 2021 01:16:21 +0100 |
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On Tue, Dec 07 2021 at 19:03, Yang Zhong wrote: > Similar to native permissions this doesn't actually enable the > permitted feature. KVM is expected to install a larger kernel buffer > and enable the feature when detecting the intention from the guest. > > Signed-off-by: Thomas Gleixner <tglx@linutronix.de> > Signed-off-by: Jing Liu <jing2.liu@intel.com> > Signed-off-by: Yang Zhong <yang.zhong@intel.com> > --- > (To Thomas) We change the definition of xstate_get_guest_group_perm() > from xstate.h to api.h since this will be called by KVM.
No.
There is absolutely no need for that. After creating a vCPU the permissions are frozen and readily available via vcpu->arch.guest_fpu.perm.
Thanks,
tglx
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