From nobody Fri Apr 3 02:35:50 2026 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.13]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E183ECA52; Tue, 24 Mar 2026 18:17:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.13 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774376249; cv=none; b=X2RQDEeDixP5JwkPSZFm29CTgVgJ0EQpY4o3Y8Rs73wtuMbq2Z3nGwUANuj/2319SKTgd2O7oU+E/juDADC9huat19yZxC2Dj+8BzcbevO7zkbMK0dCEtrCzjcMHa3nkUQgnoD5Xsr1tOIaVSyovSyOOada3TEmjbp/wvXNORr8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774376249; c=relaxed/simple; bh=evK27lgm02kwIDwTQjf4QkWDWZCY98He3PuUFGpodoo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=BkdxXqGOzavTn4P7IihprVs7I8XhzHV9T3iQ+d1fA0zyUBusivxT9gE1p5vtGt8v4Wl/VmUzo7aGpbEbMUffaaxEIwMhMLXB03nyK7ktLRIegvjbxo42ifcZK/kK8uHxOg68NRocTEash3FrXngK84TfhZ5uCkWm5KRkaHzNxmE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=GYvRKeF8; arc=none smtp.client-ip=198.175.65.13 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="GYvRKeF8" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1774376247; x=1805912247; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=evK27lgm02kwIDwTQjf4QkWDWZCY98He3PuUFGpodoo=; b=GYvRKeF8BhBdNSmikDD0gkULQJu16mvc0MoPHvhlqH3iC7O49+VrOLrA scX+bO4cP7v+ZIItEt5kCLZ9UMfr6FfUXkKEtHfoiawvC/URJNTxA32hk K4E5N2UPJfT5F17JqXdJNpGLXf2zNZYtQYQQA6hbKjLaroogaWxxBtfZl 99lznJ/vvJG8UU1vKdUxoXHMYceL1tHIEGlGXY4MUBE9UKA6YGh94SJ6D zc6XvemWV0z/QX4CPpPVry4jvX1OCocC7nBmHwY29U4sTBzK3TiAlujUP HZC5vOBMhCAwXOYtYfOnEAY3oKoI0yytMuFQtpk9vzssWMDnIJ1AhbE9X Q==; X-CSE-ConnectionGUID: fNI1SoVKRTG4SsGDAUx/ow== X-CSE-MsgGUID: KnJby++QQA+JAp5QA70ymw== X-IronPort-AV: E=McAfee;i="6800,10657,11739"; a="86479917" X-IronPort-AV: E=Sophos;i="6.23,138,1770624000"; d="scan'208";a="86479917" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Mar 2026 11:17:26 -0700 X-CSE-ConnectionGUID: Czxrg5HCTUC1nT7oOpnYoA== X-CSE-MsgGUID: IVWzbdVtR06oG1f9JnxJXg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,138,1770624000"; d="scan'208";a="217858241" Received: from guptapa-desk.jf.intel.com (HELO desk) ([10.165.239.46]) by fmviesa009-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Mar 2026 11:17:26 -0700 Date: Tue, 24 Mar 2026 11:17:25 -0700 From: Pawan Gupta To: x86@kernel.org, Jon Kohler , Nikolay Borisov , "H. Peter Anvin" , Josh Poimboeuf , David Kaplan , Sean Christopherson , Borislav Petkov , Dave Hansen , Peter Zijlstra , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , KP Singh , Jiri Olsa , "David S. Miller" , David Laight , Andy Lutomirski , Thomas Gleixner , Ingo Molnar , David Ahern , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , John Fastabend , Stanislav Fomichev , Hao Luo , Paolo Bonzini , Jonathan Corbet Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Asit Mallick , Tao Zhang , bpf@vger.kernel.org, netdev@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH v8 04/10] x86/vmscape: Rename x86_ibpb_exit_to_user to x86_predictor_flush_exit_to_user Message-ID: <20260324-vmscape-bhb-v8-4-68bb524b3ab9@linux.intel.com> X-Mailer: b4 0.15-dev References: <20260324-vmscape-bhb-v8-0-68bb524b3ab9@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20260324-vmscape-bhb-v8-0-68bb524b3ab9@linux.intel.com> Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" With the upcoming changes x86_ibpb_exit_to_user will also be used when BHB clearing sequence is used. Rename it cover both the cases. No functional change. Suggested-by: Sean Christopherson Signed-off-by: Pawan Gupta Acked-by: Sean Christopherson --- arch/x86/include/asm/entry-common.h | 6 +++--- arch/x86/include/asm/nospec-branch.h | 2 +- arch/x86/kernel/cpu/bugs.c | 4 ++-- arch/x86/kvm/x86.c | 2 +- 4 files changed, 7 insertions(+), 7 deletions(-) diff --git a/arch/x86/include/asm/entry-common.h b/arch/x86/include/asm/ent= ry-common.h index ce3eb6d5fdf9..c45858db16c9 100644 --- a/arch/x86/include/asm/entry-common.h +++ b/arch/x86/include/asm/entry-common.h @@ -94,11 +94,11 @@ static inline void arch_exit_to_user_mode_prepare(struc= t pt_regs *regs, */ choose_random_kstack_offset(rdtsc()); =20 - /* Avoid unnecessary reads of 'x86_ibpb_exit_to_user' */ + /* Avoid unnecessary reads of 'x86_predictor_flush_exit_to_user' */ if (cpu_feature_enabled(X86_FEATURE_IBPB_EXIT_TO_USER) && - this_cpu_read(x86_ibpb_exit_to_user)) { + this_cpu_read(x86_predictor_flush_exit_to_user)) { indirect_branch_prediction_barrier(); - this_cpu_write(x86_ibpb_exit_to_user, false); + this_cpu_write(x86_predictor_flush_exit_to_user, false); } } #define arch_exit_to_user_mode_prepare arch_exit_to_user_mode_prepare diff --git a/arch/x86/include/asm/nospec-branch.h b/arch/x86/include/asm/no= spec-branch.h index 0f5e6ed6c9c2..0a55b1c64741 100644 --- a/arch/x86/include/asm/nospec-branch.h +++ b/arch/x86/include/asm/nospec-branch.h @@ -533,7 +533,7 @@ void alternative_msr_write(unsigned int msr, u64 val, u= nsigned int feature) : "memory"); } =20 -DECLARE_PER_CPU(bool, x86_ibpb_exit_to_user); +DECLARE_PER_CPU(bool, x86_predictor_flush_exit_to_user); =20 static inline void indirect_branch_prediction_barrier(void) { diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c index 83f51cab0b1e..47c020b80371 100644 --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -65,8 +65,8 @@ EXPORT_PER_CPU_SYMBOL_GPL(x86_spec_ctrl_current); * be needed to before running userspace. That IBPB will flush the branch * predictor content. */ -DEFINE_PER_CPU(bool, x86_ibpb_exit_to_user); -EXPORT_PER_CPU_SYMBOL_GPL(x86_ibpb_exit_to_user); +DEFINE_PER_CPU(bool, x86_predictor_flush_exit_to_user); +EXPORT_PER_CPU_SYMBOL_GPL(x86_predictor_flush_exit_to_user); =20 u64 x86_pred_cmd __ro_after_init =3D PRED_CMD_IBPB; =20 diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index fd1c4a36b593..45d7cfedc507 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -11464,7 +11464,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu) * may migrate to. */ if (cpu_feature_enabled(X86_FEATURE_IBPB_EXIT_TO_USER)) - this_cpu_write(x86_ibpb_exit_to_user, true); + this_cpu_write(x86_predictor_flush_exit_to_user, true); =20 /* * Consume any pending interrupts, including the possible source of --=20 2.34.1