From nobody Thu Apr 2 15:41:18 2026 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.7]) (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 46DBB39184C; Fri, 27 Mar 2026 20:14:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774642473; cv=none; b=U6InoJQD8jlMUrFQtNCQqSbEJBk8enaS0HOibBeq04xNDuA8XEMu2m91oc9Xm7wA4oeQZtZWDqvsITBwKSssJFHBevEN0xIMor2TX+sDZHqKN2/IDnMv1y2BFMAWzuewzivCc1sR6iSI181fc8ayM/FbogUSswluT2MZuLRHrWc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774642473; c=relaxed/simple; bh=BnLASTfk0bboPsP8BzC/w01D2X3PlCKuz/a3ZXgxiYY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VqqZM9bzkGbS5RsLfSIyXw6mc5ttpICd+ax4nFS++7J3bmFUVKBku0yz+37TZ4hg6coxj8T9A94mBptCWtZSBqhCRchZ9RyKs+EiprZAs3W6RpKsu98D/GokJMQB1vex8D6wotK/PYhWDQYKqS9Z0yMI+5UgJ99VQncQwLsrAo0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=mzOTH5YL; arc=none smtp.client-ip=192.198.163.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="mzOTH5YL" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1774642471; x=1806178471; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=BnLASTfk0bboPsP8BzC/w01D2X3PlCKuz/a3ZXgxiYY=; b=mzOTH5YLf7S9fmFBeXKGBiQSq9N1HqNRiuQM9YIc+rm/idSauCjPY8TG 6ZVD3y1QiIOd1JOLFrCWxtg4VO9QoqOwOSWwHHWgoK5LrlYQlQj4BuqcZ /tTLXWBzovjsv8JFnTgFqMCYE8XCYTkI55tt/EradjMnLDsfPFD7Ld9vM iDcBg8/QWj68D4joNqzgXu5HQOTz2lR1eCLcIgt1VMh57gyE/fgI8vATx Hoku86iCeclPgvN0c4vHsp+wHoP0ZprfhJ+jrjXGkUM6n8KJ2ASYJlcCr TIkfJ+HV8kTFXP0xUce3kf+bx8xhUaUkdCw49XjLMF9YDp3J3VQHt4nEt w==; X-CSE-ConnectionGUID: Kj3ai58JTb6aL3GcG0rvfA== X-CSE-MsgGUID: wV92g3mFQxyMgCLxhb6G0Q== X-IronPort-AV: E=McAfee;i="6800,10657,11742"; a="101182734" X-IronPort-AV: E=Sophos;i="6.23,144,1770624000"; d="scan'208";a="101182734" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Mar 2026 13:14:27 -0700 X-CSE-ConnectionGUID: hPUbbZq+T5uEZVlsp+4kxQ== X-CSE-MsgGUID: 0cyV7rpkRcKlx1x+mFxr9A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,144,1770624000"; d="scan'208";a="255922897" Received: from rpedgeco-desk.jf.intel.com ([10.88.27.139]) by orviesa002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Mar 2026 13:14:26 -0700 From: Rick Edgecombe To: seanjc@google.com, pbonzini@redhat.com, yan.y.zhao@intel.com, kai.huang@intel.com, kvm@vger.kernel.org, kas@kernel.org Cc: linux-kernel@vger.kernel.org, x86@kernel.org, dave.hansen@intel.com, rick.p.edgecombe@intel.com Subject: [PATCH 04/17] KVM: x86: Make "external SPTE" ops that can fail RET0 static calls Date: Fri, 27 Mar 2026 13:14:08 -0700 Message-ID: <20260327201421.2824383-5-rick.p.edgecombe@intel.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260327201421.2824383-1-rick.p.edgecombe@intel.com> References: <20260327201421.2824383-1-rick.p.edgecombe@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Sean Christopherson Define kvm_x86_ops .link_external_spt(), .set_external_spte(), and .free_external_spt() as RET0 static calls so that an unexpected call to a a default operation doesn't consume garbage. Fixes: 77ac7079e66d ("KVM: x86/tdp_mmu: Propagate building mirror page tabl= es") Fixes: 94faba8999b9 ("KVM: x86/tdp_mmu: Propagate tearing down mirror page = tables") Signed-off-by: Sean Christopherson Signed-off-by: Rick Edgecombe --- arch/x86/include/asm/kvm-x86-ops.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/x86/include/asm/kvm-x86-ops.h b/arch/x86/include/asm/kvm-= x86-ops.h index 3776cf5382a2..31d5c5d58ae6 100644 --- a/arch/x86/include/asm/kvm-x86-ops.h +++ b/arch/x86/include/asm/kvm-x86-ops.h @@ -95,9 +95,9 @@ KVM_X86_OP_OPTIONAL_RET0(set_tss_addr) KVM_X86_OP_OPTIONAL_RET0(set_identity_map_addr) KVM_X86_OP_OPTIONAL_RET0(get_mt_mask) KVM_X86_OP(load_mmu_pgd) -KVM_X86_OP_OPTIONAL(link_external_spt) -KVM_X86_OP_OPTIONAL(set_external_spte) -KVM_X86_OP_OPTIONAL(free_external_spt) +KVM_X86_OP_OPTIONAL_RET0(link_external_spt) +KVM_X86_OP_OPTIONAL_RET0(set_external_spte) +KVM_X86_OP_OPTIONAL_RET0(free_external_spt) KVM_X86_OP_OPTIONAL(remove_external_spte) KVM_X86_OP(has_wbinvd_exit) KVM_X86_OP(get_l2_tsc_offset) --=20 2.53.0