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 75B72C3DA4A for ; Fri, 12 Jul 2024 12:27:25 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sSF1B-0003mA-4Y; Fri, 12 Jul 2024 08:04:53 -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 1sSF17-0003Lh-Sh; Fri, 12 Jul 2024 08:04:49 -0400 Received: from mail-pf1-x435.google.com ([2607:f8b0:4864:20::435]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1sSF15-0005tv-Mb; Fri, 12 Jul 2024 08:04:49 -0400 Received: by mail-pf1-x435.google.com with SMTP id d2e1a72fcca58-706a1711ee5so1522023b3a.0; Fri, 12 Jul 2024 05:04:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1720785881; x=1721390681; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=VSdEx+3/IO385nx55P7iJ1IKkfoDSyJ7uSRZgpIc/C0=; b=X15w63TPxn7ypbykiyfKEqdkftaQGUb3mjJF8OMgP/cyAUMxM6OcY4ZOBEO1VmcE5Z 4YxqiulnGvrB3a8JCnVvmUsOCFj19jjLItrlv2eTncgfDIZDSsGWU9rs1NuGG3txJlJs JCs+zDiEGw4p9ms8jndNmBlk22s4YRc3qRpbwliuqgCFl8uL7OdsfSFXuzA9iwDJkb2P ON6oIYdgw5XstZLdz8b9x2wmAwETZS43OVyvQPLBXhSRUA4UrLJfHgBH1/WWTOEaa5bp +rfODnO7LX+D399T2EmJNcgQxPA1OyVP1HAJnNF1WYt3Qcm8z+q/BH/hm8d92vBUx8oR rV8w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1720785881; x=1721390681; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=VSdEx+3/IO385nx55P7iJ1IKkfoDSyJ7uSRZgpIc/C0=; b=caLZ0EE9f8BeOph8TUITFAPDCw3RlrbCrTQlFigLOX3x/GjmSHliabUtTVBMroGU7C ArTrAEPtsRSZTK26aeYHL4dN4fynAsj/i9blxQget8zJ0a/XSOaoCcZ6INtt0zSEjSmb /lpwXoe98boucWjGw9oUPInL1BDCkiTVhReqBaWiTpA/0lL2XqF6drod0sSMntiY3w5H TVA2cbPKvw+zpADSVctPIK8ydXrbTdqTNfR5TEg9ZWp96ZSN6gX3OLX+o70BGOJHvWKb cL/MspA/0c0sqchzarsBE+nIEXE6VGR711QDDAbTwlZjU/3e1r8V/wkYZJlTtPblG7n7 /yxw== X-Forwarded-Encrypted: i=1; AJvYcCXsZv+F74Mxxtd739vZoy08exw+rw6ZO4qzAB5Bc3u4YYR9+cel16mSCcPxE6z2Zg+cHQu2ixKiHRckF4QOCC0HLAtMmeI= X-Gm-Message-State: AOJu0Yx1Mtvjm4FkQlOVO0bvwesJA9j911GFCT3o1RNzUYqQqyqgnfMN G/bT/lBTP+uIlv5/yLNQW5tXRWbha4ULUtwpmgqyh8+2uO1gNKHDkUBwrA== X-Google-Smtp-Source: AGHT+IELspR74/6dYvT9ljitdMkm0/xOp5sVLkZomCv0/PRjAL7glY62JVPwyRYqcjlPGjigN+ld4Q== X-Received: by 2002:a05:6a21:33a7:b0:1c2:8cf4:7656 with SMTP id adf61e73a8af0-1c29820ed84mr13632265637.10.1720785881466; Fri, 12 Jul 2024 05:04:41 -0700 (PDT) Received: from wheely.local0.net ([203.220.44.216]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-70b438c0a1csm7308967b3a.63.2024.07.12.05.04.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 Jul 2024 05:04:41 -0700 (PDT) From: Nicholas Piggin To: qemu-ppc@nongnu.org Cc: Nicholas Piggin , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Barrat?= , Harsh Prateek Bora , qemu-devel@nongnu.org Subject: [PATCH v2 18/19] ppc/pnv: Implement POWER10 PC xscom registers for direct controls Date: Fri, 12 Jul 2024 22:02:45 +1000 Message-ID: <20240712120247.477133-19-npiggin@gmail.com> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240712120247.477133-1-npiggin@gmail.com> References: <20240712120247.477133-1-npiggin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::435; envelope-from=npiggin@gmail.com; helo=mail-pf1-x435.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org The PC unit in the processor core contains xscom registers that provide low level status and control of the CPU. This implements "direct controls", sufficient for skiboot firmware, which uses it to send NMI IPIs between CPUs. POWER10 is sufficiently different from POWER9 (particularly with respect to QME and special wakeup) that it is not trivial to implement POWER9 support by reusing the code. Signed-off-by: Nicholas Piggin --- include/hw/ppc/pnv_core.h | 3 ++ hw/ppc/pnv_core.c | 89 ++++++++++++++++++++++++++++++++++++--- 2 files changed, 87 insertions(+), 5 deletions(-) diff --git a/include/hw/ppc/pnv_core.h b/include/hw/ppc/pnv_core.h index c8784777a4..1de79a818e 100644 --- a/include/hw/ppc/pnv_core.h +++ b/include/hw/ppc/pnv_core.h @@ -109,6 +109,9 @@ OBJECT_DECLARE_TYPE(PnvQuad, PnvQuadClass, PNV_QUAD) struct PnvQuad { DeviceState parent_obj; + bool special_wakeup_done; + bool special_wakeup[4]; + uint32_t quad_id; MemoryRegion xscom_regs; MemoryRegion xscom_qme_regs; diff --git a/hw/ppc/pnv_core.c b/hw/ppc/pnv_core.c index 238a4cd4ab..b32bdb79ff 100644 --- a/hw/ppc/pnv_core.c +++ b/hw/ppc/pnv_core.c @@ -185,16 +185,40 @@ static const MemoryRegionOps pnv_core_power9_xscom_ops = { */ #define PNV10_XSCOM_EC_CORE_THREAD_STATE 0x412 +#define PNV10_XSCOM_EC_CORE_THREAD_INFO 0x413 +#define PNV10_XSCOM_EC_CORE_DIRECT_CONTROLS 0x449 +#define PNV10_XSCOM_EC_CORE_RAS_STATUS 0x454 static uint64_t pnv_core_power10_xscom_read(void *opaque, hwaddr addr, unsigned int width) { + PnvCore *pc = PNV_CORE(opaque); + int nr_threads = CPU_CORE(pc)->nr_threads; + int i; uint32_t offset = addr >> 3; uint64_t val = 0; switch (offset) { case PNV10_XSCOM_EC_CORE_THREAD_STATE: - val = 0; + for (i = 0; i < nr_threads; i++) { + PowerPCCPU *cpu = pc->threads[i]; + CPUState *cs = CPU(cpu); + + if (cs->halted) { + val |= PPC_BIT(56 + i); + } + } + break; + case PNV10_XSCOM_EC_CORE_THREAD_INFO: + break; + case PNV10_XSCOM_EC_CORE_RAS_STATUS: + for (i = 0; i < nr_threads; i++) { + PowerPCCPU *cpu = pc->threads[i]; + CPUState *cs = CPU(cpu); + if (cs->stopped) { + val |= PPC_BIT(0 + 8 * i) | PPC_BIT(1 + 8 * i); + } + } break; default: qemu_log_mask(LOG_UNIMP, "%s: unimp read 0x%08x\n", __func__, @@ -207,9 +231,46 @@ static uint64_t pnv_core_power10_xscom_read(void *opaque, hwaddr addr, static void pnv_core_power10_xscom_write(void *opaque, hwaddr addr, uint64_t val, unsigned int width) { + PnvCore *pc = PNV_CORE(opaque); + int nr_threads = CPU_CORE(pc)->nr_threads; + int i; uint32_t offset = addr >> 3; switch (offset) { + case PNV10_XSCOM_EC_CORE_DIRECT_CONTROLS: + for (i = 0; i < nr_threads; i++) { + PowerPCCPU *cpu = pc->threads[i]; + CPUState *cs = CPU(cpu); + + if (val & PPC_BIT(7 + 8 * i)) { /* stop */ + val &= ~PPC_BIT(7 + 8 * i); + cpu_pause(cs); + } + if (val & PPC_BIT(6 + 8 * i)) { /* start */ + val &= ~PPC_BIT(6 + 8 * i); + cpu_resume(cs); + } + if (val & PPC_BIT(4 + 8 * i)) { /* sreset */ + val &= ~PPC_BIT(4 + 8 * i); + pnv_cpu_do_nmi_resume(cs); + } + if (val & PPC_BIT(3 + 8 * i)) { /* clear maint */ + /* + * Hardware has very particular cases for where clear maint + * must be used and where start must be used to resume a + * thread. These are not modelled exactly, just treat + * this and start the same. + */ + val &= ~PPC_BIT(3 + 8 * i); + cpu_resume(cs); + } + } + if (val) { + qemu_log_mask(LOG_UNIMP, "%s: unimp bits in DIRECT_CONTROLS " + "0x%016lx\n", __func__, val); + } + break; + default: qemu_log_mask(LOG_UNIMP, "%s: unimp write 0x%08x\n", __func__, offset); @@ -523,6 +584,7 @@ static const MemoryRegionOps pnv_quad_power10_xscom_ops = { static uint64_t pnv_qme_power10_xscom_read(void *opaque, hwaddr addr, unsigned int width) { + PnvQuad *eq = PNV_QUAD(opaque); uint32_t offset = addr >> 3; uint64_t val = -1; @@ -530,10 +592,14 @@ static uint64_t pnv_qme_power10_xscom_read(void *opaque, hwaddr addr, * Forth nibble selects the core within a quad, mask it to process read * for any core. */ - switch (offset & ~0xf000) { - case P10_QME_SPWU_HYP: + switch (offset & ~PPC_BITMASK32(16, 19)) { case P10_QME_SSH_HYP: - return 0; + val = 0; + if (eq->special_wakeup_done) { + val |= PPC_BIT(1); /* SPWU DONE */ + val |= PPC_BIT(4); /* SSH SPWU DONE */ + } + break; default: qemu_log_mask(LOG_UNIMP, "%s: unimp read 0x%08x\n", __func__, offset); @@ -545,9 +611,22 @@ static uint64_t pnv_qme_power10_xscom_read(void *opaque, hwaddr addr, static void pnv_qme_power10_xscom_write(void *opaque, hwaddr addr, uint64_t val, unsigned int width) { + PnvQuad *eq = PNV_QUAD(opaque); uint32_t offset = addr >> 3; + bool set; + int i; - switch (offset) { + switch (offset & ~PPC_BITMASK32(16, 19)) { + case P10_QME_SPWU_HYP: + set = !!(val & PPC_BIT(0)); + eq->special_wakeup_done = set; + for (i = 0; i < 4; i++) { + /* These bits select cores in the quad */ + if (offset & PPC_BIT32(16 + i)) { + eq->special_wakeup[i] = set; + } + } + break; default: qemu_log_mask(LOG_UNIMP, "%s: unimp write 0x%08x\n", __func__, offset); -- 2.45.1