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Open Source and information security mailing list archives
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Date: Sun, 10 Oct 2021 19:39:55 -0700 From: Andi Kleen <ak@...ux.intel.com> To: "Michael S. Tsirkin" <mst@...hat.com>, Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com> Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, Peter Zijlstra <peterz@...radead.org>, Andy Lutomirski <luto@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>, Richard Henderson <rth@...ddle.net>, Thomas Bogendoerfer <tsbogend@...ha.franken.de>, James E J Bottomley <James.Bottomley@...senpartnership.com>, Helge Deller <deller@....de>, "David S . Miller" <davem@...emloft.net>, Arnd Bergmann <arnd@...db.de>, Jonathan Corbet <corbet@....net>, Paolo Bonzini <pbonzini@...hat.com>, David Hildenbrand <david@...hat.com>, Andrea Arcangeli <aarcange@...hat.com>, Josh Poimboeuf <jpoimboe@...hat.com>, Peter H Anvin <hpa@...or.com>, Dave Hansen <dave.hansen@...el.com>, Tony Luck <tony.luck@...el.com>, Dan Williams <dan.j.williams@...el.com>, Kirill Shutemov <kirill.shutemov@...ux.intel.com>, Sean Christopherson <seanjc@...gle.com>, Kuppuswamy Sathyanarayanan <knsathya@...nel.org>, x86@...nel.org, linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org, linux-alpha@...r.kernel.org, linux-mips@...r.kernel.org, linux-parisc@...r.kernel.org, sparclinux@...r.kernel.org, linux-arch@...r.kernel.org, linux-doc@...r.kernel.org, virtualization@...ts.linux-foundation.org Subject: Re: [PATCH v5 16/16] x86/tdx: Add cmdline option to force use of ioremap_host_shared > The connection is quite unfortunate IMHO. > Can't there be an option > that unbreaks drivers *without* opening up security holes by > making BIOS shared? That would require new low level APIs that distinguish both cases, and a tree sweep. -Andi
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