From: "Nikunj A. Dadhania" <nikunj@amd.com>
To: Tom Lendacky <thomas.lendacky@amd.com>,
linux-kernel@vger.kernel.org, x86@kernel.org,
kvm@vger.kernel.org,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: bp@alien8.de, mingo@redhat.com, tglx@linutronix.de,
dave.hansen@linux.intel.com, dionnaglaze@google.com,
pgonda@google.com, seanjc@google.com, pbonzini@redhat.com
Subject: Re: [PATCH v5 09/14] x86/sev: Add Secure TSC support for SNP guests
Date: Thu, 2 Nov 2023 11:11:52 +0530 [thread overview]
Message-ID: <55de810b-66f9-49e3-8459-b7cac1532a0c@amd.com> (raw)
In-Reply-To: <b5e71977-abf6-aa27-3a7b-37230b014724@amd.com>
On 10/31/2023 1:56 AM, Tom Lendacky wrote:
>> diff --git a/include/linux/cc_platform.h b/include/linux/cc_platform.h
>> index cb0d6cd1c12f..e081ca4d5da2 100644
>> --- a/include/linux/cc_platform.h
>> +++ b/include/linux/cc_platform.h
>> @@ -90,6 +90,14 @@ enum cc_attr {
>> * Examples include TDX Guest.
>> */
>> CC_ATTR_HOTPLUG_DISABLED,
>> +
>> + /**
>> + * @CC_ATTR_GUEST_SECURE_TSC: Secure TSC is active.
>> + *
>> + * The platform/OS is running as a guest/virtual machine and actively
>> + * using AMD SEV-SNP Secure TSC feature.
>
> I think TDX also has a secure TSC like feature, so can this be generic?
Yes, we can do that. In SNP case SecureTSC is an optional feature, not sure if that is the case for TDX as well.
Kirill any inputs ?
>
> Thanks,
> Tom
>
>> + */
>> + CC_ATTR_GUEST_SECURE_TSC,
>> };
>> #ifdef CONFIG_ARCH_HAS_CC_PLATFORM
Regards
Nikunj
next prev parent reply other threads:[~2023-11-02 5:42 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-30 6:36 [PATCH v5 00/14] " Nikunj A Dadhania
2023-10-30 6:36 ` [PATCH v5 01/14] virt: sev-guest: Use AES GCM crypto library Nikunj A Dadhania
2023-10-30 17:51 ` Tom Lendacky
2023-11-02 3:33 ` Nikunj A. Dadhania
2023-10-30 6:36 ` [PATCH v5 02/14] virt: sev-guest: Move mutex to SNP guest device structure Nikunj A Dadhania
2023-10-30 6:36 ` [PATCH v5 03/14] virt: sev-guest: Replace dev_dbg with pr_debug Nikunj A Dadhania
2023-10-30 6:36 ` [PATCH v5 04/14] virt: sev-guest: Add SNP guest request structure Nikunj A Dadhania
2023-10-30 18:16 ` Tom Lendacky
2023-11-02 4:01 ` Nikunj A. Dadhania
2023-10-30 6:36 ` [PATCH v5 05/14] virt: sev-guest: Add vmpck_id to snp_guest_dev struct Nikunj A Dadhania
2023-10-30 16:16 ` Dionna Amalie Glaze
2023-10-30 17:12 ` Tom Lendacky
2023-11-02 4:03 ` Nikunj A. Dadhania
2023-10-30 18:26 ` Tom Lendacky
2023-10-30 6:36 ` [PATCH v5 06/14] x86/sev: Cache the secrets page address Nikunj A Dadhania
2023-10-30 6:36 ` [PATCH v5 07/14] x86/sev: Move and reorganize sev guest request api Nikunj A Dadhania
2023-10-30 19:16 ` Tom Lendacky
2023-11-02 4:28 ` Nikunj A. Dadhania
2023-11-02 14:17 ` Tom Lendacky
2023-10-30 6:36 ` [PATCH v5 08/14] x86/mm: Add generic guest initialization hook Nikunj A Dadhania
2023-10-30 17:23 ` Dave Hansen
2023-11-02 4:30 ` Nikunj A. Dadhania
2023-10-30 19:19 ` Tom Lendacky
2023-11-02 5:08 ` Nikunj A. Dadhania
2023-10-30 6:36 ` [PATCH v5 09/14] x86/sev: Add Secure TSC support for SNP guests Nikunj A Dadhania
2023-10-30 16:46 ` Dionna Amalie Glaze
2023-11-02 5:13 ` Nikunj A. Dadhania
2023-10-30 20:26 ` Tom Lendacky
2023-11-02 5:36 ` Nikunj A. Dadhania
2023-11-02 14:29 ` Tom Lendacky
2023-11-02 5:41 ` Nikunj A. Dadhania [this message]
2023-11-02 10:36 ` Kirill A. Shutemov
2023-11-06 10:45 ` Nikunj A. Dadhania
2023-11-06 13:00 ` Kirill A. Shutemov
2023-10-30 6:36 ` [PATCH v5 10/14] x86/sev: Change TSC MSR behavior for Secure TSC enabled guests Nikunj A Dadhania
2023-10-30 6:36 ` [PATCH v5 11/14] x86/sev: Prevent RDTSC/RDTSCP interception " Nikunj A Dadhania
2023-10-30 20:32 ` Tom Lendacky
2023-11-02 5:47 ` Nikunj A. Dadhania
2023-10-30 6:36 ` [PATCH v5 12/14] x86/kvmclock: Skip kvmclock when Secure TSC is available Nikunj A Dadhania
2023-10-30 21:00 ` Tom Lendacky
2023-11-02 5:39 ` Nikunj A. Dadhania
2023-10-30 6:36 ` [PATCH v5 13/14] x86/tsc: Mark Secure TSC as reliable clocksource Nikunj A Dadhania
2023-10-30 17:18 ` Dave Hansen
2023-11-02 5:53 ` Nikunj A. Dadhania
2023-11-02 10:33 ` Kirill A. Shutemov
2023-11-02 12:07 ` Nikunj A. Dadhania
2023-11-02 12:16 ` Nikunj A. Dadhania
2023-11-02 12:38 ` Kirill A. Shutemov
2023-11-06 11:53 ` Nikunj A. Dadhania
2023-11-06 13:03 ` Kirill A. Shutemov
2023-10-30 6:36 ` [PATCH v5 14/14] x86/sev: Enable Secure TSC for SNP guests Nikunj A Dadhania
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