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From: Borislav Petkov <bp@alien8.de>
To: Tianyu Lan <ltykernel@gmail.com>
Cc: luto@kernel.org, tglx@linutronix.de, mingo@redhat.com,
	dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
	seanjc@google.com, pbonzini@redhat.com, jgross@suse.com,
	tiala@microsoft.com, kirill@shutemov.name,
	jiangshan.ljs@antgroup.com, peterz@infradead.org,
	ashish.kalra@amd.com, srutherford@google.com,
	akpm@linux-foundation.org, anshuman.khandual@arm.com,
	pawan.kumar.gupta@linux.intel.com, adrian.hunter@intel.com,
	daniel.sneddon@linux.intel.com,
	alexander.shishkin@linux.intel.com, sandipan.das@amd.com,
	ray.huang@amd.com, brijesh.singh@amd.com, michael.roth@amd.com,
	thomas.lendacky@amd.com, venu.busireddy@oracle.com,
	sterritt@google.com, tony.luck@intel.com,
	samitolvanen@google.com, fenghua.yu@intel.com,
	linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
	linux-hyperv@vger.kernel.org, linux-arch@vger.kernel.org
Subject: Re: [RFC PATCH V2 01/18] x86/sev: Pvalidate memory gab for decompressing kernel
Date: Tue, 29 Nov 2022 16:22:31 +0100	[thread overview]
Message-ID: <Y4Yjt0rOzsSoosEj@zn.tnic> (raw)
In-Reply-To: <6b3bdbbd-d381-3e52-57ec-729c8ab2d042@gmail.com>

On Tue, Nov 29, 2022 at 10:42:48PM +0800, Tianyu Lan wrote:
> Thanks for your review. sev_snp_enabled() is used after sev_status
> was initialized in sev_enable() while pvalidate_for_startup_ 64() is
> called before sev_enable().

Then you're going to have to change the code so that sev_status is
initialized before you need it. And not break others in the process.

And lemme save you some time - I won't accept sloppy code. You need to
integrate the functionality you need in the code paths properly - not
bolt it on in complete disregard of the flow just because it is easier.

> This is for Linux direct boot mode and so it needs to do such check
> here.

I don't know what "Linux direct boot mode" is so until you define it
properly and explain everything in detail, this is not going anywhere.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette

  reply	other threads:[~2022-11-29 15:22 UTC|newest]

Thread overview: 63+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-19  3:46 [RFC PATCH V2 00/18] x86/hyperv/sev: Add AMD sev-snp enlightened guest support on hyperv Tianyu Lan
2022-11-19  3:46 ` [RFC PATCH V2 01/18] x86/sev: Pvalidate memory gab for decompressing kernel Tianyu Lan
2022-11-29 12:56   ` Borislav Petkov
2022-11-29 14:42     ` Tianyu Lan
2022-11-29 15:22       ` Borislav Petkov [this message]
2022-12-28 19:15       ` Michael Kelley (LINUX)
2022-12-06  9:16   ` Gupta, Pankaj
2022-12-08 13:04     ` Tianyu Lan
2022-11-19  3:46 ` [RFC PATCH V2 02/18] x86/hyperv: Add sev-snp enlightened guest specific config Tianyu Lan
2022-12-12 17:56   ` Michael Kelley (LINUX)
2022-12-13  9:58     ` Tianyu Lan
2022-11-19  3:46 ` [RFC PATCH V2 03/18] x86/hyperv: apic change for sev-snp enlightened guest Tianyu Lan
2022-12-12 19:00   ` Michael Kelley (LINUX)
2022-11-19  3:46 ` [RFC PATCH V2 04/18] x86/hyperv: Decrypt hv vp assist page in " Tianyu Lan
2022-12-12 19:41   ` Michael Kelley (LINUX)
2022-12-13 15:21     ` Tianyu Lan
2022-11-19  3:46 ` [RFC PATCH V2 05/18] x86/hyperv: Get Virtual Trust Level via hvcall Tianyu Lan
2022-12-12 23:41   ` Michael Kelley (LINUX)
2022-11-19  3:46 ` [RFC PATCH V2 06/18] x86/hyperv: Use vmmcall to implement hvcall in sev-snp enlightened guest Tianyu Lan
2022-12-13 17:19   ` Michael Kelley (LINUX)
2022-12-14 16:02     ` Tianyu Lan
2023-01-09  7:24   ` Dexuan Cui
2022-11-19  3:46 ` [RFC PATCH V2 07/18] clocksource: hyper-v: decrypt hyperv tsc page " Tianyu Lan
2022-12-13 17:30   ` Michael Kelley (LINUX)
2022-12-14 16:05     ` Tianyu Lan
2022-11-19  3:46 ` [RFC PATCH V2 08/18] x86/hyperv: decrypt vmbus pages for " Tianyu Lan
2022-12-13 18:08   ` Michael Kelley (LINUX)
2022-12-26  4:19     ` Tianyu Lan
2022-11-19  3:46 ` [RFC PATCH V2 09/18] x86/hyperv: set target vtl in the vmbus init message Tianyu Lan
2022-12-14 18:12   ` Michael Kelley (LINUX)
2022-11-19  3:46 ` [RFC PATCH V2 10/18] drivers: hv: Decrypt percpu hvcall input arg page in sev-snp enlightened guest Tianyu Lan
2022-12-08 21:52   ` Dexuan Cui
2022-12-09  2:26     ` Tianyu Lan
2022-12-14 18:16   ` Michael Kelley (LINUX)
2022-12-26  7:26     ` Tianyu Lan
2022-11-19  3:46 ` [RFC PATCH V2 11/18] Drivers: hv: vmbus: Decrypt vmbus ring buffer Tianyu Lan
2022-12-14 18:25   ` Michael Kelley (LINUX)
2022-12-26  7:59     ` Tianyu Lan
2022-11-19  3:46 ` [RFC PATCH V2 12/18] x86/hyperv: Initialize cpu and memory for sev-snp enlightened guest Tianyu Lan
2022-12-28 17:07   ` Michael Kelley (LINUX)
2022-11-19  3:46 ` [RFC PATCH V2 13/18] x86/hyperv: Add smp support for sev-snp guest Tianyu Lan
2022-12-28 18:14   ` Michael Kelley (LINUX)
2022-11-19  3:46 ` [RFC PATCH V2 14/18] x86/hyperv: Add hyperv-specific hadling for VMMCALL under SEV-ES Tianyu Lan
2022-11-19  3:46 ` [RFC PATCH V2 15/18] x86/sev: Add a #HV exception handler Tianyu Lan
2023-01-10 12:47   ` Gupta, Pankaj
2023-01-10 13:43     ` Tianyu Lan
2023-01-12  7:43       ` Gupta, Pankaj
2022-11-19  3:46 ` [RFC PATCH V2 16/18] x86/sev: Initialize #HV doorbell and handle interrupt requests Tianyu Lan
2022-11-21 15:05   ` Kalra, Ashish
2022-11-22 13:46     ` Tianyu Lan
2022-11-22 19:17       ` Kalra, Ashish
2022-11-23 18:36   ` Tom Lendacky
2022-11-25  3:36     ` Tianyu Lan
2022-11-25 11:49   ` Christophe de Dinechin
2022-11-28  5:47     ` Tianyu Lan
2022-12-07 14:13   ` Gupta, Pankaj
2022-12-08 14:21     ` Tianyu Lan
2022-12-08 14:36       ` Gupta, Pankaj
2022-12-08 11:47   ` Gupta, Pankaj
2022-12-08 14:25     ` Tianyu Lan
2022-11-19  3:46 ` [RFC PATCH V2 17/18] x86/sev: optimize system vector processing invoked from #HV exception Tianyu Lan
2022-11-19  3:46 ` [RFC PATCH V2 18/18] x86/sev: Fix interrupt exit code paths " Tianyu Lan
2022-12-13  7:37   ` Gupta, Pankaj

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