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Message-ID: <b0e8da09162cc6f2194e445a6e566f1bc356d5d0.camel@redhat.com>
Subject: Re: [PATCH RESEND v4 00/23] SMM emulation and interrupt shadow fixes
From:   Maxim Levitsky <mlevitsk@redhat.com>
To:     Paolo Bonzini <pbonzini@redhat.com>, kvm@vger.kernel.org
Cc:     Thomas Gleixner <tglx@linutronix.de>,
        Yang Zhong <yang.zhong@intel.com>, x86@kernel.org,
        Jim Mattson <jmattson@google.com>,
        Vitaly Kuznetsov <vkuznets@redhat.com>,
        Sean Christopherson <seanjc@google.com>,
        Wanpeng Li <wanpengli@tencent.com>,
        Shuah Khan <shuah@kernel.org>,
        Guang Zeng <guang.zeng@intel.com>,
        Joerg Roedel <joro@8bytes.org>, linux-kernel@vger.kernel.org,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Ingo Molnar <mingo@redhat.com>,
        linux-kselftest@vger.kernel.org, Kees Cook <keescook@chromium.org>,
        "H. Peter Anvin" <hpa@zytor.com>, Wei Wang <wei.w.wang@intel.com>,
        Borislav Petkov <bp@alien8.de>
Date:   Thu, 27 Oct 2022 20:06:00 +0300
In-Reply-To: <0e3a0cab-1093-3e83-9e9c-f8639ebe5da0@redhat.com>
References: <20221025124741.228045-1-mlevitsk@redhat.com>
         <0e3a0cab-1093-3e83-9e9c-f8639ebe5da0@redhat.com>
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On Thu, 2022-10-27 at 18:49 +0200, Paolo Bonzini wrote:
> On 10/25/22 14:47, Maxim Levitsky wrote:
> > This patch series is a result of long debug work to find out why
> > sometimes guests with win11 secure boot
> > were failing during boot.
> > 
> > During writing a unit test I found another bug, turns out
> > that on rsm emulation, if the rsm instruction was done in real
> > or 32 bit mode, KVM would truncate the restored RIP to 32 bit.
> > 
> > I also refactored the way we write SMRAM so it is easier
> > now to understand what is going on.
> > 
> > The main bug in this series which I fixed is that we
> > allowed #SMI to happen during the STI interrupt shadow,
> > and we did nothing to both reset it on #SMI handler
> > entry and restore it on RSM.
> 
> I have now sent out the final/new version of the first 8 patches and 
> will review these tomorrow.  Thanks for your patience. :)
> 
> Paolo
> 
Thank you very much!!


Best regards,
	Maxim Levitsky