From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.18]) (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 A73444C10E3 for ; Thu, 15 Oct 2026 21:41:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792100504; cv=none; b=Wl5O0AfRvsdh7xpGGcRB2X/KfYAaX+5EdwlvMptk9iNJxKfHfOwSaOj3QHzNFNsDoKuD+rSzKsgzn7mqJbYZAUj1fN1rlCGkrgsTdYGQmaYcKlQNNd5V+pcadHH3Oa6xF2ZE3FGdt3TIzeEBHeQIIGx8x4TL6h2A3W0zDm1Huw4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792100504; c=relaxed/simple; bh=OyCvodZEiLCE6GpSDADrAQ+xhLnZhGBgjBskBTmKLog=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DPMOyFvy98SDrvZlyT051ZkGc/n6mC9sskBwYYcqyXvTT0uZCMdBFiGv1M+3wulWL9nhHpN6LCPpsWFNy1wUfqHFdg50H8XlXXRDtlRLlkmd7JQ2FxGN/Kc/NnrZkHWSmGWRDCJwn1vW1XNSNS5HG/WyK1lrlsIZQ7Fg8wkLVzQ= 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=A3KcVRhw; arc=none smtp.client-ip=192.198.163.18 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="A3KcVRhw" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1792100503; x=1823636503; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=OyCvodZEiLCE6GpSDADrAQ+xhLnZhGBgjBskBTmKLog=; b=A3KcVRhwbFtXr0+GROWkUux86TEd1ftYKiVrgefEsvQ/pRmkINzzyZMn YNA9R5/+LubdEnjPqWVoKhXypaNpxL0AaVXht3XlkXO0bShIY9v/OJ8Sf kWTG958LHMy59Ull0zPY4u4IhwPDP+DI6D167sMuLGbacbcCijQTficKc mS/58HGUVW97ZEYyaHrsR4XsRUiuWEPFhH0TzSLqyZqU8tvFrRaVyAl6v BBabMFUs7brf3JMywPazBD65Zed7MVdBKmdK68mTQJ/zVF0o/lu0fCRc6 AcxldfmOAizpeaTlRDYnE3nmXRSd4xkDnv518EmGkKYZIaM97cNXZY5wL w==; X-CSE-ConnectionGUID: dXSjTXDxTKyJ9SsUt6GAhA== X-CSE-MsgGUID: tnryR+qvRJCmAGHkYQfQmw== X-IronPort-AV: E=McAfee;i="6800,10657,11936"; a="902143" X-IronPort-AV: E=Sophos;i="6.27,160,1787036400"; d="scan'208";a="902143" Received: from fmviesa008.fm.intel.com ([10.60.135.148]) by fmvoesa112.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Oct 2026 14:41:40 -0700 X-CSE-ConnectionGUID: blEGxSyoQG6yPjSRB7HLhA== X-CSE-MsgGUID: +BtkBYV3SVy8C++9p3dAUw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,160,1787036400"; d="scan'208";a="2104377" Received: from chang-linux-3.sc.intel.com (HELO chang-linux-3) ([172.25.66.174]) by fmviesa008.fm.intel.com with ESMTP; 15 Oct 2026 14:41:41 -0700 From: "Chang S. Bae" To: linux-kernel@vger.kernel.org Cc: x86@kernel.org, tglx@kernel.org, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, peterz@infradead.org, david.kaplan@amd.com, chang.seok.bae@intel.com Subject: [PATCH v3 4/9] x86/apic: Implement self-NMI support Date: Thu, 15 Oct 2026 21:14:21 +0000 Message-ID: <20261015211426.49114-5-chang.seok.bae@intel.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261015211426.49114-1-chang.seok.bae@intel.com> References: <20261015211426.49114-1-chang.seok.bae@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: 8bit From: David Kaplan Add a function to send an NMI-to-self which is needed for stop-machine NMI facility. Note that send_IPI_self() cannot be used to send an NMI so send_IPI() is used. Signed-off-by: David Kaplan Signed-off-by: Chang S. Bae --- V2 -> V3: Use __apic_send_IPI() (Sashiko) --- arch/x86/kernel/apic/ipi.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/x86/kernel/apic/ipi.c b/arch/x86/kernel/apic/ipi.c index c627bee3b14f..2bb70db5ee27 100644 --- a/arch/x86/kernel/apic/ipi.c +++ b/arch/x86/kernel/apic/ipi.c @@ -4,6 +4,7 @@ #include #include #include +#include #include @@ -248,6 +249,15 @@ void default_send_IPI_self(int vector) __default_send_IPI_shortcut(APIC_DEST_SELF, vector); } +#ifdef CONFIG_STOP_MACHINE_NMI + +void arch_send_self_nmi(void) +{ + __apic_send_IPI(smp_processor_id(), NMI_VECTOR); +} + +#endif + #ifdef CONFIG_X86_32 void default_send_IPI_mask_sequence_logical(const struct cpumask *mask, int vector) { -- 2.53.0