From nobody Thu Jan 1 09:01:54 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=eik.bme.hu Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1698161708683508.0043870531879; Tue, 24 Oct 2023 08:35:08 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qvJQs-0007sO-Jm; Tue, 24 Oct 2023 11:35:02 -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 1qvJQD-0006RA-Vw; Tue, 24 Oct 2023 11:34:22 -0400 Received: from zero.eik.bme.hu ([2001:738:2001:2001::2001]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qvJQ8-0005lK-Lk; Tue, 24 Oct 2023 11:34:21 -0400 Received: from zero.eik.bme.hu (blah.eik.bme.hu [152.66.115.182]) by localhost (Postfix) with SMTP id ED0B6757233; Tue, 24 Oct 2023 17:34:06 +0200 (CEST) Received: by zero.eik.bme.hu (Postfix, from userid 432) id C7DD1757202; Tue, 24 Oct 2023 17:34:06 +0200 (CEST) Message-Id: In-Reply-To: References: From: BALATON Zoltan Subject: [PATCH v4 5/8] target/ppc: Simplify syscall exception handlers MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable To: qemu-devel@nongnu.org, qemu-ppc@nongnu.org Cc: clg@kaod.org, Greg Kurz , Daniel Henrique Barboza , Nicholas Piggin Date: Tue, 24 Oct 2023 17:34:06 +0200 (CEST) X-Spam-Probability: 8% Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2001:738:2001:2001::2001; envelope-from=balaton@eik.bme.hu; helo=zero.eik.bme.hu X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1698161710698100001 Content-Type: text/plain; charset="utf-8" After previous changes the hypercall handling in 7xx and 74xx exception handlers can be folded into one if statement to simpilfy this code. Also add "unlikely" to mark the less freqiently used branch for the compiler. Signed-off-by: BALATON Zoltan --- target/ppc/excp_helper.c | 24 ++++++++---------------- 1 file changed, 8 insertions(+), 16 deletions(-) diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c index dd08efe4f2..d073c35989 100644 --- a/target/ppc/excp_helper.c +++ b/target/ppc/excp_helper.c @@ -762,26 +762,22 @@ static void powerpc_excp_7xx(PowerPCCPU *cpu, int exc= p) case POWERPC_EXCP_SYSCALL: /* System call exception = */ { int lev =3D env->error_code; - - if (lev =3D=3D 1 && cpu->vhyp) { - dump_hcall(env); - } else { - dump_syscall(env); - } /* * The Virtual Open Firmware (VOF) relies on the 'sc 1' * instruction to communicate with QEMU. The pegasos2 machine * uses VOF and the 7xx CPUs, so although the 7xx don't have * HV mode, we need to keep hypercall support. */ - if (lev =3D=3D 1 && cpu->vhyp) { + if (unlikely(lev =3D=3D 1 && cpu->vhyp)) { PPCVirtualHypervisorClass *vhc =3D PPC_VIRTUAL_HYPERVISOR_GET_CLASS(cpu->vhyp); + dump_hcall(env); vhc->hypercall(cpu->vhyp, cpu); powerpc_reset_excp_state(cpu); return; + } else { + dump_syscall(env); } - break; } case POWERPC_EXCP_FPU: /* Floating-point unavailable exception = */ @@ -907,26 +903,22 @@ static void powerpc_excp_74xx(PowerPCCPU *cpu, int ex= cp) case POWERPC_EXCP_SYSCALL: /* System call exception = */ { int lev =3D env->error_code; - - if (lev =3D=3D 1 && cpu->vhyp) { - dump_hcall(env); - } else { - dump_syscall(env); - } /* * The Virtual Open Firmware (VOF) relies on the 'sc 1' * instruction to communicate with QEMU. The pegasos2 machine * uses VOF and the 74xx CPUs, so although the 74xx don't have * HV mode, we need to keep hypercall support. */ - if (lev =3D=3D 1 && cpu->vhyp) { + if (unlikely(lev =3D=3D 1 && cpu->vhyp)) { PPCVirtualHypervisorClass *vhc =3D PPC_VIRTUAL_HYPERVISOR_GET_CLASS(cpu->vhyp); + dump_hcall(env); vhc->hypercall(cpu->vhyp, cpu); powerpc_reset_excp_state(cpu); return; + } else { + dump_syscall(env); } - break; } case POWERPC_EXCP_FPU: /* Floating-point unavailable exception = */ --=20 2.30.9