From: Josh Poimboeuf <jpoimboe@kernel.org>
To: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Peter Zijlstra <peterz@infradead.org>,
Andy Lutomirski <luto@kernel.org>,
Jonathan Corbet <corbet@lwn.net>,
Sean Christopherson <seanjc@google.com>,
Paolo Bonzini <pbonzini@redhat.com>,
tony.luck@intel.com, ak@linux.intel.com,
tim.c.chen@linux.intel.com,
Andrew Cooper <andrew.cooper3@citrix.com>,
Nikolay Borisov <nik.borisov@suse.com>,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
kvm@vger.kernel.org,
Alyssa Milburn <alyssa.milburn@linux.intel.com>,
Daniel Sneddon <daniel.sneddon@linux.intel.com>,
antonio.gomez.iglesias@linux.intel.com,
Alyssa Milburn <alyssa.milburn@intel.com>
Subject: Re: [PATCH v6 1/6] x86/bugs: Add asm helpers for executing VERW
Date: Thu, 1 Feb 2024 19:29:09 -0800 [thread overview]
Message-ID: <20240202032909.exegdxpgyndlkn2n@treble> (raw)
In-Reply-To: <20240123-delay-verw-v6-1-a8206baca7d3@linux.intel.com>
On Tue, Jan 23, 2024 at 11:41:01PM -0800, Pawan Gupta wrote:
> index 4af140cf5719..79a7e81b9458 100644
> --- a/arch/x86/include/asm/cpufeatures.h
> +++ b/arch/x86/include/asm/cpufeatures.h
> @@ -308,10 +308,10 @@
> #define X86_FEATURE_SMBA (11*32+21) /* "" Slow Memory Bandwidth Allocation */
> #define X86_FEATURE_BMEC (11*32+22) /* "" Bandwidth Monitoring Event Configuration */
> #define X86_FEATURE_USER_SHSTK (11*32+23) /* Shadow stack support for user mode applications */
> -
> #define X86_FEATURE_SRSO (11*32+24) /* "" AMD BTB untrain RETs */
> #define X86_FEATURE_SRSO_ALIAS (11*32+25) /* "" AMD BTB untrain RETs through aliasing */
> #define X86_FEATURE_IBPB_ON_VMEXIT (11*32+26) /* "" Issue an IBPB only on VMEXIT */
> +#define X86_FEATURE_CLEAR_CPU_BUF (11*32+27) /* "" Clear CPU buffers using VERW */
This will need to be rebased. And the "11*32" level is now full in
Linus' tree, so this will presumably need to go to a different "level".
--
Josh
next prev parent reply other threads:[~2024-02-02 3:29 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-24 7:40 [PATCH v6 0/6] Delay VERW Pawan Gupta
2024-01-24 7:41 ` [PATCH v6 1/6] x86/bugs: Add asm helpers for executing VERW Pawan Gupta
2024-02-01 1:18 ` Pawan Gupta
2024-02-02 3:29 ` Josh Poimboeuf [this message]
2024-02-02 21:31 ` Pawan Gupta
2024-01-24 7:41 ` [PATCH v6 2/6] x86/entry_64: Add VERW just before userspace transition Pawan Gupta
2024-01-24 7:41 ` [PATCH v6 3/6] x86/entry_32: " Pawan Gupta
2024-01-24 7:41 ` [PATCH v6 4/6] x86/bugs: Use ALTERNATIVE() instead of mds_user_clear static key Pawan Gupta
2024-01-24 7:42 ` [PATCH v6 5/6] KVM: VMX: Use BT+JNC, i.e. EFLAGS.CF to select VMRESUME vs. VMLAUNCH Pawan Gupta
2024-01-24 7:42 ` [PATCH v6 6/6] KVM: VMX: Move VERW closer to VMentry for MDS mitigation Pawan Gupta
2024-01-26 21:31 ` Sean Christopherson
2024-02-01 1:12 ` Pawan Gupta
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