From patchwork Fri Jan 26 23:42:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jacob Pan X-Patchwork-Id: 13533598 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.10]) (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 A0F0758AD6; Fri, 26 Jan 2024 23:37:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.10 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706312245; cv=none; b=XFvZQCSTXI0vaPSvBzbsGpZjSWghmBVCCdxvSeQ5J6um3oHc1arV77OXyHSURj1ErTHg3dhAbF0Elr/N+m7NEKkgUdL8dPKPdWxX+lxOz/EY7lg4RwJMTc8GbfhDuPcNwWcP58EdPZLy6B2pvQ2eB5j4eftZ+QA3n3o03a7yWO0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706312245; c=relaxed/simple; bh=0GX8HhoSt+Bowm5iZvkwyHIzLD8tLG+XNrU90AlqK/Q=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=cIU3Zw3CDMIqCtNAT88WQ1Rg63mwfQ2AvyeT3ZLMCcjelurM/dv2QaabmQxlvezeeVIY9UbgDRDhwfElzDasnxYvniFZcU3HZVxkDIC6dAvDigBkOfM3qC56M2STPEGhFkoEhNDuvKkbAQQF5WLd7WaL/D2LL9nQjCz2lOfiQMU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=UVFqwKBB; arc=none smtp.client-ip=192.198.163.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none 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="UVFqwKBB" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1706312243; x=1737848243; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=0GX8HhoSt+Bowm5iZvkwyHIzLD8tLG+XNrU90AlqK/Q=; b=UVFqwKBB0HHHM9yNjwsGDBn92Q0uNqj5NO+RtPvV59UwG/ppJD9qsHCZ AeCs2B8PaiBdqLQ/7O3/i79EXDqXRPSM4aiH+apvYkeiagetMx5yiK4ly uHXOQI8hT+lwcJ3xRGuYveePVg3YUd01nSTSPJ0Fk6ZK26gsYVFwf601K 4yGmcQJrswKXkTA5KHKxxfjebgmoIgxs3yPhothIsxXCdzPvVb0bguShk EC0oOAENuG4t5BMlnTuCM5XA+RCYgOj2zksaoVX/1BRNYq7C/CWTlwydf KPyF/h3IS7pwSNqJgmAyqY9gM6jBCot3o4Gm26x4hEMOZSvwNMjHNlJoI A==; X-IronPort-AV: E=McAfee;i="6600,9927,10964"; a="9990643" X-IronPort-AV: E=Sophos;i="6.05,220,1701158400"; d="scan'208";a="9990643" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jan 2024 15:37:20 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10964"; a="821290711" X-IronPort-AV: E=Sophos;i="6.05,220,1701158400"; d="scan'208";a="821290711" Received: from srinivas-otcpl-7600.jf.intel.com (HELO jacob-builder.jf.intel.com) ([10.54.39.116]) by orsmga001.jf.intel.com with ESMTP; 26 Jan 2024 15:37:20 -0800 From: Jacob Pan To: LKML , X86 Kernel , Peter Zijlstra , iommu@lists.linux.dev, Thomas Gleixner , "Lu Baolu" , kvm@vger.kernel.org, Dave Hansen , Joerg Roedel , "H. Peter Anvin" , "Borislav Petkov" , "Ingo Molnar" Cc: Paul Luse , Dan Williams , Jens Axboe , Raj Ashok , "Tian, Kevin" , maz@kernel.org, seanjc@google.com, "Robin Murphy" , Jacob Pan Subject: [PATCH 02/15] x86/irq: Unionize PID.PIR for 64bit access w/o casting Date: Fri, 26 Jan 2024 15:42:24 -0800 Message-Id: <20240126234237.547278-3-jacob.jun.pan@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240126234237.547278-1-jacob.jun.pan@linux.intel.com> References: <20240126234237.547278-1-jacob.jun.pan@linux.intel.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Make PIR field into u64 such that atomic xchg64 can be used without ugly casting. Suggested-by: Thomas Gleixner Signed-off-by: Jacob Pan --- arch/x86/include/asm/posted_intr.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/posted_intr.h b/arch/x86/include/asm/posted_intr.h index f0324c56f7af..acf237b2882e 100644 --- a/arch/x86/include/asm/posted_intr.h +++ b/arch/x86/include/asm/posted_intr.h @@ -9,7 +9,10 @@ /* Posted-Interrupt Descriptor */ struct pi_desc { - u32 pir[8]; /* Posted interrupt requested */ + union { + u32 pir[8]; /* Posted interrupt requested */ + u64 pir64[4]; + }; union { struct { /* bit 256 - Outstanding Notification */