From: Yosry Ahmed <yosry.ahmed@linux.dev>
To: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: x86@kernel.org, Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Peter Zijlstra <peterz@infradead.org>,
Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>,
Sean Christopherson <seanjc@google.com>,
Paolo Bonzini <pbonzini@redhat.com>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/6] IBPB cleanups and a fixup
Date: Thu, 20 Feb 2025 21:50:54 +0000 [thread overview]
Message-ID: <Z7ejvk31gYNCIwFv@google.com> (raw)
In-Reply-To: <20250220204724.y3b6wx7y2ks3fuct@jpoimboe>
On Thu, Feb 20, 2025 at 12:47:24PM -0800, Josh Poimboeuf wrote:
> On Thu, Feb 20, 2025 at 07:59:54PM +0000, Yosry Ahmed wrote:
> > > static inline void indirect_branch_prediction_barrier(void)
> > > {
> > > asm volatile(ALTERNATIVE("", "call write_ibpb", X86_FEATURE_IBPB)
> > > : ASM_CALL_CONSTRAINT
> > > : : "rax", "rcx", "rdx", "memory");
> > > }
> > >
> > > I also renamed "entry_ibpb" -> "write_ibpb" since it's no longer just
> > > for entry code.
> >
> > Do you want me to add this in this series or do you want to do it on top
> > of it? If you have a patch lying around I can also include it as-is.
>
> Your patches are already an improvement and can be taken as-is:
>
> Acked-by: Josh Poimboeuf <jpoimboe@kernel.org>
>
> I'll try to dust off my patches soon and rebase them on yours.
SGTM, thanks!
>
> --
> Josh
prev parent reply other threads:[~2025-02-20 21:51 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-19 22:08 [PATCH 0/6] IBPB cleanups and a fixup Yosry Ahmed
2025-02-19 22:08 ` [PATCH 1/6] x86/bugs: Move the X86_FEATURE_USE_IBPB check into callers Yosry Ahmed
2025-02-25 19:47 ` Sean Christopherson
2025-02-25 21:28 ` Yosry Ahmed
2025-02-19 22:08 ` [PATCH 2/6] x86/mm: Remove X86_FEATURE_USE_IBPB checks in cond_mitigation() Yosry Ahmed
2025-02-19 22:08 ` [PATCH 3/6] x86/bugs: Remove the X86_FEATURE_USE_IBPB check in ib_prctl_set() Yosry Ahmed
2025-02-19 22:08 ` [PATCH 4/6] x86/bugs: Use a static branch to guard IBPB on vCPU load Yosry Ahmed
2025-02-25 19:49 ` Sean Christopherson
2025-02-25 21:27 ` Yosry Ahmed
2025-02-25 22:40 ` Sean Christopherson
2025-02-26 2:49 ` Yosry Ahmed
2025-02-27 0:46 ` Sean Christopherson
2025-02-27 0:54 ` Yosry Ahmed
2025-02-19 22:08 ` [PATCH 5/6] KVM: nVMX: Always use IBPB to properly virtualize IBRS Yosry Ahmed
2025-02-19 23:09 ` Jim Mattson
2025-02-25 19:50 ` Sean Christopherson
2025-02-19 22:08 ` [PATCH 6/6] x86/bugs: Remove X86_FEATURE_USE_IBPB Yosry Ahmed
2025-02-20 19:04 ` [PATCH 0/6] IBPB cleanups and a fixup Josh Poimboeuf
2025-02-20 19:59 ` Yosry Ahmed
2025-02-20 20:47 ` Josh Poimboeuf
2025-02-20 21:50 ` Yosry Ahmed [this message]
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