From nobody Tue Nov 11 19:17:04 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.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; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1565936519; cv=none; d=zoho.com; s=zohoarc; b=LiWBu81galaXocrs7XY6NLKSRvEcdewpp1dvpz+l/qCc/x+J4tF06Gne8M2YGV1HFZ8qenFm96OXzfTSE/CyEup+19xKHV28nku15UMrpzKq11wG/jVLxW4Ja4BOqgtV5kgsg1DzJ7AfzB2x+v1ybxNDbVKSGkHZJTPMsxjo9AE= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1565936519; h=Cc:Date:From:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:Message-ID:Sender:Subject:To:ARC-Authentication-Results; bh=uePQeDGF3dKC5EnNBZNGlkoNwb9Vi8ScqsGgXanzBNE=; b=f8S42TeW0FR1z2XCCkFiY/WKKheOBtird0GChgQdTEPSZvl7JG49hpWDd9uqe8HlAv42KGheI/abveA9eaCDY6vBg1wJgM/BaaaKLzvD8sOBK/vsRqrUhlYfOccKgsAW248c+dgL+tgUhg9hxWTyt/utaTQ502OcXiddu0C5Ecg= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1565936519575472.94346083825303; Thu, 15 Aug 2019 23:21:59 -0700 (PDT) Received: from localhost ([::1]:49638 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1hyVcZ-00073x-BX for importer@patchew.org; Fri, 16 Aug 2019 02:21:55 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56285) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1hyVYy-0005Oe-Tf for qemu-devel@nongnu.org; Fri, 16 Aug 2019 02:18:13 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hyVYx-00045e-3z for qemu-devel@nongnu.org; Fri, 16 Aug 2019 02:18:12 -0400 Received: from ozlabs.ru ([107.173.13.209]:52610) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hyVYw-00043b-Ut; Fri, 16 Aug 2019 02:18:11 -0400 Received: from fstn1-p1.ozlabs.ibm.com (localhost [IPv6:::1]) by ozlabs.ru (Postfix) with ESMTP id A7A32AE8001D; Fri, 16 Aug 2019 02:17:19 -0400 (EDT) From: Alexey Kardashevskiy To: qemu-devel@nongnu.org Date: Fri, 16 Aug 2019 16:17:33 +1000 Message-Id: <20190816061733.53572-1-aik@ozlabs.ru> X-Mailer: git-send-email 2.17.1 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 107.173.13.209 Subject: [Qemu-devel] [PATCH qemu] target/ppc: Add Directed Privileged Door-bell Exception State (DPDES) SPR X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Alexey Kardashevskiy , Paul Mackerras , qemu-ppc@nongnu.org, David Gibson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" DPDES stores a status of a doorbell message and if it is lost in migration, the destination CPU won't receive it. This does not hit us much as IPIs complete too quick to catch a pending one and even if we missed one, broadcasts happen often enough to wake that CPU. This defines DPDES and registers with KVM for migration. Signed-off-by: Alexey Kardashevskiy --- target/ppc/cpu.h | 1 + target/ppc/translate_init.inc.c | 14 ++++++++++++++ 2 files changed, 15 insertions(+) diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h index 64799386f9ab..f0521a435d2d 100644 --- a/target/ppc/cpu.h +++ b/target/ppc/cpu.h @@ -1466,6 +1466,7 @@ typedef PowerPCCPU ArchCPU; #define SPR_MPC_ICTRL (0x09E) #define SPR_MPC_BAR (0x09F) #define SPR_PSPB (0x09F) +#define SPR_DPDES (0x0B0) #define SPR_DAWR (0x0B4) #define SPR_RPR (0x0BA) #define SPR_CIABR (0x0BB) diff --git a/target/ppc/translate_init.inc.c b/target/ppc/translate_init.in= c.c index c9fcd87095f5..7e41ae145600 100644 --- a/target/ppc/translate_init.inc.c +++ b/target/ppc/translate_init.inc.c @@ -8198,6 +8198,18 @@ static void gen_spr_power8_pspb(CPUPPCState *env) KVM_REG_PPC_PSPB, 0); } =20 +static void gen_spr_power8_dpdes(CPUPPCState *env) +{ +#if !defined(CONFIG_USER_ONLY) + /* Directed Privileged Door-bell Exception State, used for IPI */ + spr_register_kvm_hv(env, SPR_DPDES, "DPDES", + SPR_NOACCESS, SPR_NOACCESS, + &spr_read_generic, SPR_NOACCESS, + &spr_read_generic, &spr_write_generic, + KVM_REG_PPC_DPDES, 0x00000000); +#endif +} + static void gen_spr_power8_ic(CPUPPCState *env) { #if !defined(CONFIG_USER_ONLY) @@ -8629,6 +8641,7 @@ static void init_proc_POWER8(CPUPPCState *env) gen_spr_power8_pmu_user(env); gen_spr_power8_tm(env); gen_spr_power8_pspb(env); + gen_spr_power8_dpdes(env); gen_spr_vtb(env); gen_spr_power8_ic(env); gen_spr_power8_book4(env); @@ -8817,6 +8830,7 @@ static void init_proc_POWER9(CPUPPCState *env) gen_spr_power8_pmu_user(env); gen_spr_power8_tm(env); gen_spr_power8_pspb(env); + gen_spr_power8_dpdes(env); gen_spr_vtb(env); gen_spr_power8_ic(env); gen_spr_power8_book4(env); --=20 2.17.1