From patchwork Tue Oct 1 05:00:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xin Li X-Patchwork-Id: 13817460 Received: from mail.zytor.com (terminus.zytor.com [198.137.202.136]) (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 8AD181A3BDA; Tue, 1 Oct 2024 05:02:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.136 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727758939; cv=none; b=IucSap/jv0sqAEufqkysAveyZtpa3QHUB7n14Sm8dB9dwksxzPc1TMCuNx1evQ6Khjag25O660BgXengZrUqoxct8/uhH34kqZMOGdSolMrtJoxZI6lHKpCdjQKq/FGhmaQUadnYWoLeDJIhhQWSOby/zqpiPTQPDgCSgPEvd78= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727758939; c=relaxed/simple; bh=D0M8MUphEJDzt0DhRWl6jjrN238HMRnD/K9ryJpI3N4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=IalPto9jy2L87LrivdAvxIlrTyJtS+kH2VAJk3M84QP90TAzfjEhqimzVxMsWake+RHuzUXlKKyLs7tcmxQ98I7m7EUKgKKpY5xhdxqa3bnGXzruJ+O+zLmoT+iY6gJq/XtEdwEOuyHpqA5jNfK5DLHrNv7E+rBMlCu2SY9z8eE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zytor.com; spf=pass smtp.mailfrom=zytor.com; dkim=pass (2048-bit key) header.d=zytor.com header.i=@zytor.com header.b=W6bw8Nid; arc=none smtp.client-ip=198.137.202.136 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zytor.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=zytor.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=zytor.com header.i=@zytor.com header.b="W6bw8Nid" Received: from terminus.zytor.com (terminus.zytor.com [IPv6:2607:7c80:54:3:0:0:0:136]) (authenticated bits=0) by mail.zytor.com (8.18.1/8.17.1) with ESMTPSA id 49151A7V3643828 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Mon, 30 Sep 2024 22:01:21 -0700 DKIM-Filter: OpenDKIM Filter v2.11.0 mail.zytor.com 49151A7V3643828 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zytor.com; s=2024091601; t=1727758882; bh=9fOauzGby+rPmCjUXvj6urYAJT7PhTs9glaZ68z8kxs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=W6bw8NidU/8g0afX5F7UrR84tBgi/aIhFmJnSwqaANZ3dnAsl8yNSMcv8rwT3kE51 QhnOT1CT/dKFOr0CYmL+s8MRxUyFbmZgny5LX9fL+Pb5+EyIsvN2h5zeb9tg6AC2oL X5xIyfVZAyFGSjRYa0vKYoWjQcF7ZuqemSipFrZ+R1I6/6++M0yFHf4mF2TPaDHVJq pHl9J3Qf7KooHgnhihh0RpetfXzYYADDaYyiurm7qgplwct6ihEz+DspZ31KSX9QgK +AYNB8kcef9l8y5gKQPpHU8MHbPaZfDrPTR02uj5/OdhpuDc3RosKNc6ZrEonaDWSz qtSHPHc98Evtg== From: "Xin Li (Intel)" To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org Cc: seanjc@google.com, pbonzini@redhat.com, corbet@lwn.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, luto@kernel.org, peterz@infradead.org, andrew.cooper3@citrix.com, xin@zytor.com Subject: [PATCH v3 06/27] x86/cea: Export per CPU variable cea_exception_stacks Date: Mon, 30 Sep 2024 22:00:49 -0700 Message-ID: <20241001050110.3643764-7-xin@zytor.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241001050110.3643764-1-xin@zytor.com> References: <20241001050110.3643764-1-xin@zytor.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The per CPU variable cea_exception_stacks contains per CPU stacks for NMI, #DB and #DF, which is referenced in KVM to set host FRED RSP[123] each time a vCPU is loaded onto a CPU, thus it needs to be exported. Signed-off-by: Xin Li (Intel) Tested-by: Shan Kang --- arch/x86/mm/cpu_entry_area.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/mm/cpu_entry_area.c b/arch/x86/mm/cpu_entry_area.c index 575f863f3c75..b8af71b67d9a 100644 --- a/arch/x86/mm/cpu_entry_area.c +++ b/arch/x86/mm/cpu_entry_area.c @@ -17,6 +17,7 @@ static DEFINE_PER_CPU_PAGE_ALIGNED(struct entry_stack_page, entry_stack_storage) #ifdef CONFIG_X86_64 static DEFINE_PER_CPU_PAGE_ALIGNED(struct exception_stacks, exception_stacks); DEFINE_PER_CPU(struct cea_exception_stacks*, cea_exception_stacks); +EXPORT_PER_CPU_SYMBOL(cea_exception_stacks); static DEFINE_PER_CPU_READ_MOSTLY(unsigned long, _cea_offset);