From: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
To: bot+bpf-ci@kernel.org
Cc: x86@kernel.org, jon@nutanix.com, nik.borisov@suse.com,
hpa@zytor.com, jpoimboe@kernel.org, david.kaplan@amd.com,
seanjc@google.com, bp@alien8.de, dave.hansen@linux.intel.com,
peterz@infradead.org, ast@kernel.org, daniel@iogearbox.net,
andrii@kernel.org, kpsingh@kernel.org, jolsa@kernel.org,
davem@davemloft.net, david.laight.linux@gmail.com,
luto@kernel.org, tglx@kernel.org, mingo@redhat.com,
dsahern@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com,
song@kernel.org, yonghong.song@linux.dev,
john.fastabend@gmail.com, sdf@fomichev.me, haoluo@google.com,
pbonzini@redhat.com, corbet@lwn.net,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
asit.k.mallick@intel.com, tao1.zhang@intel.com,
bpf@vger.kernel.org, netdev@vger.kernel.org,
linux-doc@vger.kernel.org, martin.lau@kernel.org, clm@meta.com,
ihor.solodrai@linux.dev
Subject: Re: [PATCH v8 07/10] x86/vmscape: Use static_call() for predictor flush
Date: Tue, 24 Mar 2026 12:51:44 -0700 [thread overview]
Message-ID: <20260324195144.c6gaxewnyojsev2q@desk> (raw)
In-Reply-To: <901294cad0355c079f343400e594daf91c8c07f0ad0ef41064c746d96e8907bd@mail.kernel.org>
On Tue, Mar 24, 2026 at 07:09:31PM +0000, bot+bpf-ci@kernel.org wrote:
> > diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h
> > index dbe104df339b8..b4d529dd6d305 100644
> > --- a/arch/x86/include/asm/cpufeatures.h
> > +++ b/arch/x86/include/asm/cpufeatures.h
> > @@ -503,7 +503,7 @@
> > #define X86_FEATURE_CLEAR_CPU_BUF_VM (21*32+13) /* Clear CPU buffers using VERW before VMRUN */
> > -#define X86_FEATURE_IBPB_EXIT_TO_USER (21*32+14) /* Use IBPB on exit-to-userspace, see VMSCAPE bug */
> > +/* Free */
> > #define X86_FEATURE_ABMC (21*32+15) /* Assignable Bandwidth Monitoring Counters */
>
> Should the corresponding entry in
> tools/arch/x86/include/asm/cpufeatures.h also be updated to match?
No, because:
"So its important not to touch the copies in tools/ when doing changes in
the original kernel headers, that will be done later, when
check-headers.sh inform about the change to the perf tools hackers."
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/tools/include/uapi/README
next prev parent reply other threads:[~2026-03-24 19:51 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-24 18:16 [PATCH v8 00/10] VMSCAPE optimization for BHI variant Pawan Gupta
2026-03-24 18:16 ` [PATCH v8 01/10] x86/bhi: x86/vmscape: Move LFENCE out of clear_bhb_loop() Pawan Gupta
2026-03-24 20:22 ` Borislav Petkov
2026-03-24 21:30 ` Pawan Gupta
2026-03-24 18:16 ` [PATCH v8 02/10] x86/bhi: Make clear_bhb_loop() effective on newer CPUs Pawan Gupta
2026-03-24 20:59 ` Borislav Petkov
2026-03-24 22:13 ` Pawan Gupta
2026-03-25 20:37 ` Borislav Petkov
2026-03-25 22:40 ` David Laight
2026-03-26 8:39 ` Pawan Gupta
2026-03-26 9:15 ` David Laight
2026-03-26 10:01 ` Borislav Petkov
2026-03-26 10:45 ` David Laight
2026-03-26 20:29 ` Pawan Gupta
2026-03-28 0:42 ` Pawan Gupta
2026-03-28 10:08 ` David Laight
2026-04-01 8:12 ` Pawan Gupta
2026-04-01 9:02 ` David Laight
2026-04-01 18:52 ` Pawan Gupta
2026-03-25 17:50 ` Jim Mattson
2026-03-25 18:44 ` Pawan Gupta
2026-03-25 19:41 ` David Laight
2026-03-25 22:29 ` Pawan Gupta
2026-03-24 18:17 ` [PATCH v8 03/10] x86/bhi: Rename clear_bhb_loop() to clear_bhb_loop_nofence() Pawan Gupta
2026-03-24 18:17 ` [PATCH v8 04/10] x86/vmscape: Rename x86_ibpb_exit_to_user to x86_predictor_flush_exit_to_user Pawan Gupta
2026-03-31 17:50 ` Sean Christopherson
2026-04-01 8:13 ` Pawan Gupta
2026-03-24 18:17 ` [PATCH v8 05/10] x86/vmscape: Move mitigation selection to a switch() Pawan Gupta
2026-03-24 18:17 ` [PATCH v8 06/10] x86/vmscape: Use write_ibpb() instead of indirect_branch_prediction_barrier() Pawan Gupta
2026-03-24 18:18 ` [PATCH v8 07/10] x86/vmscape: Use static_call() for predictor flush Pawan Gupta
2026-03-24 19:09 ` bot+bpf-ci
2026-03-24 19:51 ` Pawan Gupta [this message]
2026-03-24 18:18 ` [PATCH v8 08/10] x86/vmscape: Deploy BHB clearing mitigation Pawan Gupta
2026-03-24 19:09 ` bot+bpf-ci
2026-03-24 19:46 ` Pawan Gupta
2026-03-24 18:18 ` [PATCH v8 09/10] x86/vmscape: Resolve conflict between attack-vectors and vmscape=force Pawan Gupta
2026-03-24 18:19 ` [PATCH v8 10/10] x86/vmscape: Add cmdline vmscape=on to override attack vector controls Pawan Gupta
2026-03-24 19:09 ` bot+bpf-ci
2026-03-30 3:16 ` [PATCH v8 00/10] VMSCAPE optimization for BHI variant Jon Kohler
2026-03-30 16:11 ` Pawan Gupta
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