From: Sean Christopherson <sean.j.christopherson@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
Kai Huang <kai.huang@intel.com>
Subject: Re: [PATCH 0/4] KVM: x86/mmu: Page fault handling cleanups
Date: Fri, 25 Sep 2020 13:40:43 -0700 [thread overview]
Message-ID: <20200925204043.GH31528@linux.intel.com> (raw)
In-Reply-To: <ca36404c-9b2a-dbce-d5e4-a3fc3cc620bc@redhat.com>
On Fri, Sep 25, 2020 at 10:38:02PM +0200, Paolo Bonzini wrote:
> On 24/09/20 00:04, Sean Christopherson wrote:
> > Cleanups for page fault handling that were encountered during early TDX
> > enabling, but are worthwhile on their own. Specifically, patch 4 fixes an
> > issue where KVM doesn't detect a spurious page fault (due to the fault
> > being fixed by a different pCPU+vCPU) and does the full gamut of writing
> > the SPTE, updating stats, and prefetching SPTEs.
> >
> > Sean Christopherson (4):
> > KVM: x86/mmu: Return -EIO if page fault returns RET_PF_INVALID
> > KVM: x86/mmu: Invert RET_PF_* check when falling through to emulation
> > KVM: x86/mmu: Return unique RET_PF_* values if the fault was fixed
> > KVM: x86/mmu: Bail early from final #PF handling on spurious faults
> >
> > arch/x86/kvm/mmu/mmu.c | 70 +++++++++++++++++++++-------------
> > arch/x86/kvm/mmu/mmutrace.h | 13 +++----
> > arch/x86/kvm/mmu/paging_tmpl.h | 3 ++
> > 3 files changed, 52 insertions(+), 34 deletions(-)
> >
>
> Queued, thanks. Looking at the KVM_BUG_ON now since patch 1 is somewhat
> related.
Ha, very prescient of you, that's actually a KVM_BUG_ON() in my "kitchen sink"
combo of everything :-)
prev parent reply other threads:[~2020-09-25 20:45 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-23 22:04 [PATCH 0/4] KVM: x86/mmu: Page fault handling cleanups Sean Christopherson
2020-09-23 22:04 ` [PATCH 1/4] KVM: x86/mmu: Return -EIO if page fault returns RET_PF_INVALID Sean Christopherson
2020-09-23 22:04 ` [PATCH 2/4] KVM: x86/mmu: Invert RET_PF_* check when falling through to emulation Sean Christopherson
2020-09-23 22:04 ` [PATCH 4/4] KVM: x86/mmu: Bail early from final #PF handling on spurious faults Sean Christopherson
2020-09-25 20:38 ` [PATCH 0/4] KVM: x86/mmu: Page fault handling cleanups Paolo Bonzini
2020-09-25 20:40 ` Sean Christopherson [this message]
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