From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.skyhub.de (mail.skyhub.de [5.9.137.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5E2BB72 for ; Fri, 27 Aug 2021 16:55:53 +0000 (UTC) Received: from zn.tnic (p200300ec2f1117008c66b42124dc6a0e.dip0.t-ipconnect.de [IPv6:2003:ec:2f11:1700:8c66:b421:24dc:6a0e]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 91BF81EC0453; Fri, 27 Aug 2021 18:55:46 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1630083346; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=aUIFMqNpBxjAGkdg6iAwim6KAU9KWJiRd8wcruSmexk=; b=I1h1RKAoUHGmeXJ4kkuRnowXBcM3b71SUtfhRYVQSGpQpskB0KgGgSGAc6spXl+eV/pZ7h VaXItU7p5N7MhDfnQ7UvLxIpnh1VImhJ5qewIYQvYtnAlq2dZHYQzALwgSeinIr7JoAOKQ cocjbkwIdkj5PrLsibmWvOHTxtgh3ig= Date: Fri, 27 Aug 2021 18:56:23 +0200 From: Borislav Petkov To: Brijesh Singh Cc: x86@kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-efi@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-coco@lists.linux.dev, linux-mm@kvack.org, Thomas Gleixner , Ingo Molnar , Joerg Roedel , Tom Lendacky , "H. Peter Anvin" , Ard Biesheuvel , Paolo Bonzini , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Andy Lutomirski , Dave Hansen , Sergio Lopez , Peter Gonda , Peter Zijlstra , Srinivas Pandruvada , David Rientjes , Dov Murik , Tobin Feldman-Fitzthum , Michael Roth , Vlastimil Babka , "Kirill A . Shutemov" , Andi Kleen , tony.luck@intel.com, marcorr@google.com, sathyanarayanan.kuppuswamy@linux.intel.com Subject: Re: [PATCH Part1 v5 32/38] x86/sev: enable SEV-SNP-validated CPUID in #VC handlers Message-ID: References: <20210820151933.22401-1-brijesh.singh@amd.com> <20210820151933.22401-33-brijesh.singh@amd.com> <62e8b7f2-4e0d-5836-ea37-9e0a7a797017@amd.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <62e8b7f2-4e0d-5836-ea37-9e0a7a797017@amd.com> On Fri, Aug 27, 2021 at 10:47:42AM -0500, Brijesh Singh wrote: > Actually a  VMM could populate more than one page for the CPUID. One > page can include 64 entries and I believe Mike is already running into > limits (with Qemu) and exploring the ideas to extend it more than a page. You mean, like, 2 pages? :-) -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette