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Message-ID: <bf494125-1de6-dc41-1438-0ee5f802c229@redhat.com>
Date: Tue, 10 Dec 2019 11:29:00 +0100
From: Paolo Bonzini <pbonzini@...hat.com>
To: Sean Christopherson <sean.j.christopherson@...el.com>,
Radim Krčmář <rkrcmar@...hat.com>
Cc: Vitaly Kuznetsov <vkuznets@...hat.com>,
Wanpeng Li <wanpengli@...cent.com>,
Jim Mattson <jmattson@...gle.com>,
Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] KVM: x86: Add a WARN on TIF_NEED_FPU_LOAD in
kvm_load_guest_fpu()
On 09/12/19 21:05, Sean Christopherson wrote:
> + /*
> + * Reloading userspace's FPU is handled by kvm_arch_vcpu_load(), both
> + * for direct calls from userspace (via vcpu_load()) and if this task
> + * is preempted (via kvm_arch_sched_in()) between vcpu_load() and now.
via kvm_sched_in (not the arch_ function). Applied with that change.
Paolo
> + */
> + WARN_ON_ONCE(test_thread_flag(TIF_NEED_FPU_LOAD));
> +
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