linux-doc.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Manali Shukla <manali.shukla@amd.com>
To: Nikunj A Dadhania <nikunj@amd.com>
Cc: <seanjc@google.com>, <pbonzini@redhat.com>, <bp@alien8.de>,
	<peterz@infradead.org>, <mingo@redhat.com>, <mizhang@google.com>,
	<thomas.lendacky@amd.com>, <ravi.bangoria@amd.com>,
	<Sandipan.Das@amd.com>, <kvm@vger.kernel.org>,
	<linux-perf-users@vger.kernel.org>, <linux-doc@vger.kernel.org>
Subject: Re: [PATCH v2 06/12] x86/cpufeatures: Add CPUID feature bit for VIBS in SVM/SEV guests
Date: Wed, 17 Sep 2025 21:10:08 +0530	[thread overview]
Message-ID: <00d97fad-f67a-47c4-a829-fb7295dc6d19@amd.com> (raw)
In-Reply-To: <85v7lq31hd.fsf@amd.com>

On 9/10/2025 6:31 PM, Nikunj A Dadhania wrote:
> Manali Shukla <manali.shukla@amd.com> writes:
> 
>> From: Santosh Shukla <santosh.shukla@amd.com>
>>
>> The virtualized IBS (VIBS) feature allows the guest to collect IBS
>> samples without exiting the guest.
>>
>> Presence of the VIBS feature is indicated via CPUID function
>> 0x8000000A_EDX[26].
>>
>> Signed-off-by: Santosh Shukla <santosh.shukla@amd.com>
>> Signed-off-by: Manali Shukla <manali.shukla@amd.com>
>> ---
>>  arch/x86/include/asm/cpufeatures.h | 1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h
>> index 0dd44cbf7196..3c31dea00671 100644
>> --- a/arch/x86/include/asm/cpufeatures.h
>> +++ b/arch/x86/include/asm/cpufeatures.h
>> @@ -379,6 +379,7 @@
>>  #define X86_FEATURE_V_SPEC_CTRL		(15*32+20) /* "v_spec_ctrl" Virtual SPEC_CTRL */
>>  #define X86_FEATURE_VNMI		(15*32+25) /* "vnmi" Virtual NMI */
>>  #define X86_FEATURE_EXTLVT		(15*32+27) /* Extended Local vector Table */
>> +#define X86_FEATURE_VIBS		(15*32+26) /* Virtual IBS */
> 
> Please move before EXTLVT to maintain bit position order
> 
> Regards,
> Nikunj

Ack, will fix it up in V3.

-Manali

> 
>>  #define X86_FEATURE_SVME_ADDR_CHK	(15*32+28) /* SVME addr check */
>>  #define X86_FEATURE_BUS_LOCK_THRESHOLD	(15*32+29) /* Bus lock threshold */
>>  #define X86_FEATURE_IDLE_HLT		(15*32+30) /* IDLE HLT intercept */
>> -- 
>> 2.43.0


  reply	other threads:[~2025-09-17 15:40 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-09-01  5:16 [PATCH v2 00/12] Implement support for IBS virtualization Manali Shukla
2025-09-01  5:19 ` [PATCH v2 01/12] perf/amd/ibs: Fix race condition in IBS Manali Shukla
2025-09-01  5:21 ` [PATCH v2 02/12] KVM: x86: Refactor APIC register mask handling to support extended APIC registers Manali Shukla
2025-10-06 16:12   ` Naveen N Rao
2025-10-13  5:53     ` Manali Shukla
2025-09-01  5:21 ` [PATCH v2 03/12] KVM: Add KVM_GET_EXT_LAPIC and KVM_SET_EXT_LAPIC for extapic Manali Shukla
2025-09-01  5:22 ` [PATCH v2 04/12] x86/cpufeatures: Add CPUID feature bit for Extended LVT Manali Shukla
2025-09-08 13:39   ` Naveen N Rao
2025-09-17 15:34     ` Manali Shukla
2025-10-08  6:58       ` Naveen N Rao
2025-10-13  5:36         ` Manali Shukla
2025-09-01  5:22 ` [PATCH v2 05/12] KVM: x86: Add emulation support for Extented LVT registers Manali Shukla
2025-09-08 13:41   ` Naveen N Rao
2025-09-17 12:57     ` Manali Shukla
2025-10-08  7:00       ` Naveen N Rao
2025-10-13  5:38         ` Manali Shukla
2025-09-01  5:23 ` [PATCH v2 06/12] x86/cpufeatures: Add CPUID feature bit for VIBS in SVM/SEV guests Manali Shukla
2025-09-10 13:01   ` Nikunj A Dadhania
2025-09-17 15:40     ` Manali Shukla [this message]
2025-09-01  5:23 ` [PATCH v2 07/12] KVM: x86/cpuid: Add a KVM-only leaf for IBS capabilities Manali Shukla
2025-09-01  5:24 ` [PATCH v2 08/12] KVM: x86: Extend CPUID range to include new leaf Manali Shukla
2025-09-01  5:24 ` [PATCH v2 09/12] KVM: SVM: Extend VMCB area for virtualized IBS registers Manali Shukla
2025-09-01  5:25 ` [PATCH v2 10/12] KVM: SVM: Add support for IBS Virtualization Manali Shukla
2025-10-08  7:30   ` Naveen N Rao
2025-09-01  5:26 ` [PATCH v2 11/12] perf/x86/amd: Enable VPMU passthrough capability for IBS PMU Manali Shukla
2025-09-01  5:26 ` [PATCH v2 12/12] perf/x86/amd: Remove exclude_guest check from perf_ibs_init() Manali Shukla

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=00d97fad-f67a-47c4-a829-fb7295dc6d19@amd.com \
    --to=manali.shukla@amd.com \
    --cc=Sandipan.Das@amd.com \
    --cc=bp@alien8.de \
    --cc=kvm@vger.kernel.org \
    --cc=linux-doc@vger.kernel.org \
    --cc=linux-perf-users@vger.kernel.org \
    --cc=mingo@redhat.com \
    --cc=mizhang@google.com \
    --cc=nikunj@amd.com \
    --cc=pbonzini@redhat.com \
    --cc=peterz@infradead.org \
    --cc=ravi.bangoria@amd.com \
    --cc=seanjc@google.com \
    --cc=thomas.lendacky@amd.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).