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From: "Kuppuswamy, Sathyanarayanan"  <sathyanarayanan.kuppuswamy@linux.intel.com>
To: Borislav Petkov <bp@alien8.de>,
	Sathyanarayanan Kuppuswamy Natarajan 
	<sathyanarayanan.nkuppuswamy@gmail.com>
Cc: Randy Dunlap <rdunlap@infradead.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>,
	x86@kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
	David Hildenbrand <david@redhat.com>,
	Andrea Arcangeli <aarcange@redhat.com>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	Juergen Gross <jgross@suse.com>, Deep Shah <sdeep@vmware.com>,
	VMware Inc <pv-drivers@vmware.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
	Peter H Anvin <hpa@zytor.com>,
	Dave Hansen <dave.hansen@intel.com>,
	Tony Luck <tony.luck@intel.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Andi Kleen <ak@linux.intel.com>,
	Kirill Shutemov <kirill.shutemov@linux.intel.com>,
	Sean Christopherson <seanjc@google.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v8 02/11] x86/tdx: Introduce INTEL_TDX_GUEST config option
Date: Tue, 5 Oct 2021 07:48:25 -0700	[thread overview]
Message-ID: <ba068e29-aefd-8e78-48e0-5431abd93f31@linux.intel.com> (raw)
In-Reply-To: <YVxdhtRbJfd9feA4@zn.tnic>



On 10/5/21 7:13 AM, Borislav Petkov wrote:
> On Tue, Oct 05, 2021 at 06:29:43AM -0700, Sathyanarayanan Kuppuswamy Natarajan wrote:
>> For the TDX guest, x2apic will be emulated. So it will exist in our
>> case. Even if x2apic or TDX guest is not supported by CPU, it will
>> boot just fine.
> 
> Sure but why is it "select" and not "depends"?
> 
> Why does X86_X2APIC need to be selected while the others are "depends"?

Since x2APIC will always exist in TDX guest case, we have used select to
enable the support. But since we have dependency on it, I  think "depends"
might be a better choice.

> 

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer

  reply	other threads:[~2021-10-05 14:48 UTC|newest]

Thread overview: 77+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-05  2:51 [PATCH v8 00/11] Add TDX Guest Support (Initial support) Kuppuswamy Sathyanarayanan
2021-10-05  2:51 ` [PATCH v8 01/11] x86/paravirt: Move halt paravirt calls under CONFIG_PARAVIRT Kuppuswamy Sathyanarayanan
2021-10-05 20:13   ` Josh Poimboeuf
2021-10-05  2:51 ` [PATCH v8 02/11] x86/tdx: Introduce INTEL_TDX_GUEST config option Kuppuswamy Sathyanarayanan
2021-10-05  4:53   ` Randy Dunlap
2021-10-05 13:29     ` Sathyanarayanan Kuppuswamy Natarajan
2021-10-05 14:09       ` Dave Hansen
2021-10-05 14:31         ` Sean Christopherson
2021-10-05 14:43         ` Kuppuswamy, Sathyanarayanan
2021-10-05 14:13       ` Borislav Petkov
2021-10-05 14:48         ` Kuppuswamy, Sathyanarayanan [this message]
2021-10-05 17:29           ` Borislav Petkov
2021-10-05 20:21             ` Josh Poimboeuf
2021-10-05 20:38               ` Kuppuswamy, Sathyanarayanan
2021-10-05 20:17   ` Josh Poimboeuf
2021-10-05 20:33     ` Sean Christopherson
2021-10-05 20:42       ` Dave Hansen
2021-10-05 20:37     ` Kuppuswamy, Sathyanarayanan
2021-10-05  2:51 ` [PATCH v8 03/11] x86/cpufeatures: Add TDX Guest CPU feature Kuppuswamy Sathyanarayanan
2021-10-05 21:04   ` Josh Poimboeuf
2021-10-05 21:19     ` Borislav Petkov
2021-10-05 21:41     ` Kuppuswamy, Sathyanarayanan
2021-10-06  3:42       ` Josh Poimboeuf
2021-10-06  4:33         ` Kuppuswamy, Sathyanarayanan
2021-10-06  5:03           ` Josh Poimboeuf
2021-10-06 12:47             ` Borislav Petkov
2021-10-06 14:11               ` Josh Poimboeuf
2021-10-06 14:26                 ` Borislav Petkov
2021-10-06 14:25   ` Josh Poimboeuf
2021-10-06 15:26   ` Borislav Petkov
2021-10-06 15:43     ` Kuppuswamy, Sathyanarayanan
2021-10-06 16:20       ` Borislav Petkov
2021-10-05  2:51 ` [PATCH v8 04/11] x86/tdx: Add Intel ARCH support to cc_platform_has() Kuppuswamy Sathyanarayanan
2021-10-05  4:47   ` Randy Dunlap
2021-10-05 12:29     ` Kuppuswamy, Sathyanarayanan
2021-10-05 21:16   ` Josh Poimboeuf
2021-10-05 21:42     ` Kuppuswamy, Sathyanarayanan
2021-10-06 18:02     ` Borislav Petkov
2021-10-06 18:14       ` Kuppuswamy, Sathyanarayanan
2021-10-05  2:51 ` [PATCH v8 05/11] x86/tdx: Add __tdx_module_call() and __tdx_hypercall() helper functions Kuppuswamy Sathyanarayanan
2021-10-06  5:53   ` Josh Poimboeuf
2021-10-06 16:52     ` Kuppuswamy, Sathyanarayanan
2021-10-07  9:33   ` Borislav Petkov
2021-10-07 16:55     ` Kuppuswamy, Sathyanarayanan
2021-10-05  2:52 ` [PATCH v8 06/11] x86/traps: Add #VE support for TDX guest Kuppuswamy Sathyanarayanan
2021-10-06 18:40   ` Josh Poimboeuf
2021-10-07 17:06   ` Borislav Petkov
2021-10-07 17:22     ` Kuppuswamy, Sathyanarayanan
2021-10-07 17:32       ` Borislav Petkov
2021-10-17 17:15     ` Dave Hansen
2021-10-18 10:53       ` Borislav Petkov
2021-10-18 14:05         ` Dave Hansen
2021-10-18 14:09           ` Borislav Petkov
2021-10-09  3:56   ` Lai Jiangshan
2021-10-11 15:06     ` Sean Christopherson
2021-10-11 16:49       ` Andi Kleen
2021-10-05  2:52 ` [PATCH v8 07/11] x86/tdx: Add HLT " Kuppuswamy Sathyanarayanan
2021-10-06 19:17   ` Josh Poimboeuf
2021-10-07 19:25     ` Kuppuswamy, Sathyanarayanan
2021-10-08 17:31   ` Borislav Petkov
2021-10-08 17:38     ` Kuppuswamy, Sathyanarayanan
2021-10-08 17:59       ` Borislav Petkov
2021-10-05  2:52 ` [PATCH v8 08/11] x86/tdx: Wire up KVM hypercalls Kuppuswamy Sathyanarayanan
2021-10-06 19:34   ` Josh Poimboeuf
2021-10-06 19:40     ` Borislav Petkov
2021-11-05 20:59   ` Sean Christopherson
2021-11-12 16:17     ` Sathyanarayanan Kuppuswamy
2021-10-05  2:52 ` [PATCH v8 09/11] x86/tdx: Add MSR support for TDX guest Kuppuswamy Sathyanarayanan
2021-10-05 23:22   ` Josh Poimboeuf
2021-10-06  0:48     ` Kuppuswamy, Sathyanarayanan
2021-10-06 19:49   ` Josh Poimboeuf
2021-10-08  2:16     ` Kuppuswamy, Sathyanarayanan
2021-10-05  2:52 ` [PATCH v8 10/11] x86/tdx: Don't write CSTAR MSR on Intel Kuppuswamy Sathyanarayanan
2021-10-05  2:52 ` [PATCH v8 11/11] x86/tdx: Handle CPUID via #VE Kuppuswamy Sathyanarayanan
2021-10-06 20:26   ` Josh Poimboeuf
2021-10-08  2:25     ` Kuppuswamy, Sathyanarayanan
2021-10-11 18:16       ` Josh Poimboeuf

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