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[35.185.214.157]) by smtp.gmail.com with ESMTPSA id w189sm2148500pfd.164.2021.11.16.10.26.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Nov 2021 10:26:32 -0800 (PST) Date: Tue, 16 Nov 2021 18:26:29 +0000 From: Sean Christopherson To: Joerg Roedel Cc: Andy Lutomirski , Marc Orr , "Dr. David Alan Gilbert" , Borislav Petkov , Dave Hansen , Peter Gonda , Brijesh Singh , the arch/x86 maintainers , Linux Kernel Mailing List , kvm list , linux-coco@lists.linux.dev, linux-mm@kvack.org, Linux Crypto Mailing List , Thomas Gleixner , Ingo Molnar , Tom Lendacky , "H. Peter Anvin" , Ard Biesheuvel , Paolo Bonzini , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Dave Hansen , Sergio Lopez , "Peter Zijlstra (Intel)" , Srinivas Pandruvada , David Rientjes , Dov Murik , Tobin Feldman-Fitzthum , Michael Roth , Vlastimil Babka , "Kirill A . Shutemov" , Andi Kleen , Tony Luck , Sathyanarayanan Kuppuswamy , Marc Zyngier , Will Deacon , Quentin Perret Subject: Re: [PATCH Part2 v5 00/45] Add AMD Secure Nested Paging (SEV-SNP) Hypervisor Support Message-ID: References: <061ccd49-3b9f-d603-bafd-61a067c3f6fa@intel.com> <8a244d34-2b10-4cf8-894a-1bf12b59cf92@www.fastmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: AA61B5463DDB X-Stat-Signature: ffru69hx56kjckfmx4bfkgatt6rc9imb Authentication-Results: imf04.hostedemail.com; dkim=pass header.d=google.com header.s=20210112 header.b=awbmYI68; dmarc=pass (policy=reject) header.from=google.com; spf=pass (imf04.hostedemail.com: domain of seanjc@google.com designates 209.85.216.44 as permitted sender) smtp.mailfrom=seanjc@google.com X-HE-Tag: 1637087182-473103 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Nov 16, 2021, Joerg Roedel wrote: > But as Marc already pointed out, the kernel needs a plan B when an RMP > happens anyway due to some bug. I don't see why unexpected RMP #PF is a special snowflake that needs a different plan than literally every other type of unexpected #PF in the kernel.