From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E17A8C87FC8 for ; Mon, 21 Jul 2025 16:42:46 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1udtLe-0005FP-E1; Mon, 21 Jul 2025 12:26:43 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1udtJY-0007W9-Mu for qemu-devel@nongnu.org; Mon, 21 Jul 2025 12:24:33 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1udtJW-0001jg-Va for qemu-devel@nongnu.org; Mon, 21 Jul 2025 12:24:32 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1753115070; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=JCIcRY3FjrsxztCxjDU551LRjYmvTa0oL9B8vX2Hcqw=; b=FKexU2+RnfdC9Kw0HEatzwv+EHvIOU2rlGNvsQ4ZVo9EGkHNteHknTGDPuyS1KwuHCU12L I+tq05XKqA8uYMfayW5moPiLinDWasqzFT3jLctbnfTnP0//EO0ilhfU7FU7R/XlmbDSy+ o0amsypzaWvC/JULC1b3FAw1FQwImg0= Received: from mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-570-dtjntCmqNTK5_E-0B8laVA-1; Mon, 21 Jul 2025 12:24:27 -0400 X-MC-Unique: dtjntCmqNTK5_E-0B8laVA-1 X-Mimecast-MFC-AGG-ID: dtjntCmqNTK5_E-0B8laVA_1753115066 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id E9F9E19560AE; Mon, 21 Jul 2025 16:24:25 +0000 (UTC) Received: from corto.redhat.com (unknown [10.45.224.19]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id AC8CD195608D; Mon, 21 Jul 2025 16:24:23 +0000 (UTC) From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: qemu-devel@nongnu.org Cc: Nicholas Piggin , Daniel Henrique Barboza , Glenn Miles , Michael Kowal , Gautam Menghani , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Subject: [PULL 38/50] ppc/xive2: Avoid needless interrupt re-check on CPPR set Date: Mon, 21 Jul 2025 18:22:21 +0200 Message-ID: <20250721162233.686837-39-clg@redhat.com> In-Reply-To: <20250721162233.686837-1-clg@redhat.com> References: <20250721162233.686837-1-clg@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Received-SPF: pass client-ip=170.10.133.124; envelope-from=clg@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.926, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Nicholas Piggin When CPPR priority is decreased, pending interrupts do not need to be re-checked if one is already presented because by definition that will be the highest priority. This prevents a presented group interrupt from being lost. Signed-off-by: Nicholas Piggin Reviewed-by: Glenn Miles Reviewed-by: Michael Kowal Tested-by: Gautam Menghani Link: https://lore.kernel.org/qemu-devel/20250512031100.439842-39-npiggin@gmail.com Signed-off-by: Cédric Le Goater --- hw/intc/xive2.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/hw/intc/xive2.c b/hw/intc/xive2.c index be945bef1c53..531e6517baa2 100644 --- a/hw/intc/xive2.c +++ b/hw/intc/xive2.c @@ -1250,7 +1250,9 @@ static void xive2_tctx_set_cppr(XiveTCTX *tctx, uint8_t sig_ring, uint8_t cppr) } /* CPPR priority decreased (higher value) */ - xive2_tctx_process_pending(tctx, sig_ring); + if (!xive_nsr_indicates_exception(sig_ring, nsr)) { + xive2_tctx_process_pending(tctx, sig_ring); + } } void xive2_tm_set_hv_cppr(XivePresenter *xptr, XiveTCTX *tctx, -- 2.50.1