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GET /api/patches/805742/?format=api
{ "id": 805742, "url": "http://patchwork.ozlabs.org/api/patches/805742/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20170825043036.18236-3-npiggin@gmail.com/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<20170825043036.18236-3-npiggin@gmail.com>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20170825043036.18236-3-npiggin@gmail.com/", "date": "2017-08-25T04:30:34", "name": "[v3,2/4] powerpc/64s: idle POWER9 can execute stop without a sync sequence", "commit_ref": "56ee52408ed0bd4af400c04ad60f9811c82e5343", "pull_url": null, "state": "accepted", "archived": false, "hash": "4e5d44dfc77665cd4539e2c282922bf26821eb04", "submitter": { "id": 69518, "url": "http://patchwork.ozlabs.org/api/people/69518/?format=api", "name": "Nicholas Piggin", "email": "npiggin@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20170825043036.18236-3-npiggin@gmail.com/mbox/", "series": [], "comments": "http://patchwork.ozlabs.org/api/patches/805742/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/805742/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "patchwork-incoming@ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Delivered-To": [ "patchwork-incoming@ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Received": [ "from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\t(using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3xdpJx0b5wz9t5h\n\tfor <patchwork-incoming@ozlabs.org>;\n\tFri, 25 Aug 2017 14:36:33 +1000 (AEST)", "from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\tby lists.ozlabs.org (Postfix) with ESMTP id 3xdpJw4jzGzDqR9\n\tfor <patchwork-incoming@ozlabs.org>;\n\tFri, 25 Aug 2017 14:36:32 +1000 (AEST)", "from mail-pg0-x243.google.com (mail-pg0-x243.google.com\n\t[IPv6:2607:f8b0:400e:c05::243])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128\n\tbits)) (No client certificate requested)\n\tby lists.ozlabs.org (Postfix) with ESMTPS id 3xdpBY1cgRzDrK0\n\tfor <linuxppc-dev@lists.ozlabs.org>;\n\tFri, 25 Aug 2017 14:31:01 +1000 (AEST)", "by mail-pg0-x243.google.com with SMTP id q16so2044086pgc.0\n\tfor <linuxppc-dev@lists.ozlabs.org>;\n\tThu, 24 Aug 2017 21:31:01 -0700 (PDT)", "from roar.au.ibm.com (203-219-56-202.tpgi.com.au. [203.219.56.202])\n\tby smtp.gmail.com with ESMTPSA id\n\tu195sm9010365pgb.82.2017.08.24.21.30.55\n\t(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);\n\tThu, 24 Aug 2017 21:30:58 -0700 (PDT)" ], "Authentication-Results": [ "ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"BCVKILgT\"; dkim-atps=neutral", "lists.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"BCVKILgT\"; dkim-atps=neutral", "lists.ozlabs.org; dkim=pass (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"BCVKILgT\"; dkim-atps=neutral" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025;\n\th=from:to:cc:subject:date:message-id:in-reply-to:references;\n\tbh=51uIMzntDwbhyImFji474r4QdhIPiBFyk+TPv+su0yA=;\n\tb=BCVKILgTvs2nd1ggs5iDMg9QdyO0qSoOFL353oUXvTx2dW5AxuBtZg6PNpbvqNfIO/\n\tTh+m+8bsTVkPz+cErxJshHACksqpTqQTgjfnaKyJL1gBFkF46ZU7MscgYVLetgvUymyW\n\t5p1iY7zq3JFk0zHnbYDD56WypwiYivS8+G/2idNFVOwb4YLzrFW+Wg9y5y7+N9Y9Qtod\n\txXpddarGyEwl97eJ9qMPE1LFbJ7H+it4gDliTEQbamER74Xu9mVOnT7ycbrhL9umGx7Q\n\tfYmECmPfE9kBXARTaT/WWEIOveRs5sehnykcvzs5YRiAShOOFVblSjXnP9+10OMmG3bv\n\tO/YA==", "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20161025;\n\th=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to\n\t:references;\n\tbh=51uIMzntDwbhyImFji474r4QdhIPiBFyk+TPv+su0yA=;\n\tb=QaXr+FH6PiForlCXiy/ieXLHyF0qH0CvPZZQYwTldcJ7N2ygQ4ez6H/ogLuXLrBQlV\n\tT94u+Mexj+pCxjzOwe4s+GnFSytwbQ3x6tVT1EOoH0iW6FV9riYDmm4cMz5yx756iZ0g\n\telygQ5ZZnNYGjqznkFZm5K4x+onZUO0wJapX4kugk8kxHkt+ThpOuiGpFce6Etj8zbLl\n\t2Rw3vghn9tD4vkvRnZnVRFYk+nWuPToyzrU2jEI+Oh2jv3jk9w9gZu1Je79YhPOP8aEU\n\typqvbCTiwGqD/46+gDtNoAgQSomTtkOyC6v/qkx1P17MokACvIyvZfzlYWM3QMQAN1T+\n\tg+tg==", "X-Gm-Message-State": "AHYfb5gUnht4vktSQhJkdJYPJYSjBrDm63+49zYK8u38v3pXaD489UQD\n\t7h0BiRsZ3LTeEloA", "X-Received": "by 10.99.95.76 with SMTP id t73mr8499799pgb.263.1503635459260;\n\tThu, 24 Aug 2017 21:30:59 -0700 (PDT)", "From": "Nicholas Piggin <npiggin@gmail.com>", "To": "linuxppc-dev@lists.ozlabs.org", "Subject": "[PATCH v3 2/4] powerpc/64s: idle POWER9 can execute stop without a\n\tsync sequence", "Date": "Fri, 25 Aug 2017 14:30:34 +1000", "Message-Id": "<20170825043036.18236-3-npiggin@gmail.com>", "X-Mailer": "git-send-email 2.13.3", "In-Reply-To": "<20170825043036.18236-1-npiggin@gmail.com>", "References": "<20170825043036.18236-1-npiggin@gmail.com>", "X-BeenThere": "linuxppc-dev@lists.ozlabs.org", "X-Mailman-Version": "2.1.23", "Precedence": "list", "List-Id": "Linux on PowerPC Developers Mail List\n\t<linuxppc-dev.lists.ozlabs.org>", "List-Unsubscribe": "<https://lists.ozlabs.org/options/linuxppc-dev>,\n\t<mailto:linuxppc-dev-request@lists.ozlabs.org?subject=unsubscribe>", "List-Archive": "<http://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev-request@lists.ozlabs.org?subject=help>", "List-Subscribe": "<https://lists.ozlabs.org/listinfo/linuxppc-dev>,\n\t<mailto:linuxppc-dev-request@lists.ozlabs.org?subject=subscribe>", "Cc": "kvm-ppc@vger.kernel.org, Nicholas Piggin <npiggin@gmail.com>", "Errors-To": "linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org", "Sender": "\"Linuxppc-dev\"\n\t<linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org>" }, "content": "Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>\nSigned-off-by: Nicholas Piggin <npiggin@gmail.com>\n---\n arch/powerpc/include/asm/cpuidle.h | 16 ----------------\n arch/powerpc/kernel/idle_book3s.S | 26 ++++++++++++++++++++------\n 2 files changed, 20 insertions(+), 22 deletions(-)", "diff": "diff --git a/arch/powerpc/include/asm/cpuidle.h b/arch/powerpc/include/asm/cpuidle.h\nindex 8a174cba5567..eb43b5c3a7b5 100644\n--- a/arch/powerpc/include/asm/cpuidle.h\n+++ b/arch/powerpc/include/asm/cpuidle.h\n@@ -101,20 +101,4 @@ static inline void report_invalid_psscr_val(u64 psscr_val, int err)\n \n #endif\n \n-/* Idle state entry routines */\n-#ifdef\tCONFIG_PPC_P7_NAP\n-#define IDLE_STATE_ENTER_SEQ(IDLE_INST) \\\n-\t/* Magic NAP/SLEEP/WINKLE mode enter sequence */\t\\\n-\tstd\tr0,0(r1);\t\t\t\t\t\\\n-\tptesync;\t\t\t\t\t\t\\\n-\tld\tr0,0(r1);\t\t\t\t\t\\\n-236:\tcmpd\tcr0,r0,r0;\t\t\t\t\t\\\n-\tbne\t236b;\t\t\t\t\t\t\\\n-\tIDLE_INST;\t\t\t\t\t\t\\\n-\n-#define\tIDLE_STATE_ENTER_SEQ_NORET(IDLE_INST)\t\t\t\\\n-\tIDLE_STATE_ENTER_SEQ(IDLE_INST) \\\n-\tb\t.\n-#endif /* CONFIG_PPC_P7_NAP */\n-\n #endif\ndiff --git a/arch/powerpc/kernel/idle_book3s.S b/arch/powerpc/kernel/idle_book3s.S\nindex 4924647d964d..14e97f442167 100644\n--- a/arch/powerpc/kernel/idle_book3s.S\n+++ b/arch/powerpc/kernel/idle_book3s.S\n@@ -205,6 +205,19 @@ pnv_powersave_common:\n \tmtmsrd\tr7,0\n \tbctr\n \n+/*\n+ * This is the sequence required to execute idle instructions, as\n+ * specified in ISA v2.07. MSR[IR] and MSR[DR] must be 0.\n+ */\n+#define ARCH207_IDLE_STATE_ENTER_SEQ_NORET(IDLE_INST)\t\t\\\n+\t/* Magic NAP/SLEEP/WINKLE mode enter sequence */\t\\\n+\tstd\tr0,0(r1);\t\t\t\t\t\\\n+\tptesync;\t\t\t\t\t\t\\\n+\tld\tr0,0(r1);\t\t\t\t\t\\\n+236:\tcmpd\tcr0,r0,r0;\t\t\t\t\t\\\n+\tbne\t236b;\t\t\t\t\t\t\\\n+\tIDLE_INST;\n+\n \t.globl pnv_enter_arch207_idle_mode\n pnv_enter_arch207_idle_mode:\n #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE\n@@ -230,7 +243,7 @@ pnv_enter_arch207_idle_mode:\n \tstb\tr3,PACA_THREAD_IDLE_STATE(r13)\n \tcmpwi\tcr3,r3,PNV_THREAD_SLEEP\n \tbge\tcr3,2f\n-\tIDLE_STATE_ENTER_SEQ_NORET(PPC_NAP)\n+\tARCH207_IDLE_STATE_ENTER_SEQ_NORET(PPC_NAP)\n \t/* No return */\n 2:\n \t/* Sleep or winkle */\n@@ -269,7 +282,7 @@ pnv_fastsleep_workaround_at_entry:\n \n common_enter: /* common code for all the threads entering sleep or winkle */\n \tbgt\tcr3,enter_winkle\n-\tIDLE_STATE_ENTER_SEQ_NORET(PPC_SLEEP)\n+\tARCH207_IDLE_STATE_ENTER_SEQ_NORET(PPC_SLEEP)\n \n fastsleep_workaround_at_entry:\n \toris\tr15,r15,PNV_CORE_IDLE_LOCK_BIT@h\n@@ -291,7 +304,7 @@ fastsleep_workaround_at_entry:\n enter_winkle:\n \tbl\tsave_sprs_to_stack\n \n-\tIDLE_STATE_ENTER_SEQ_NORET(PPC_WINKLE)\n+\tARCH207_IDLE_STATE_ENTER_SEQ_NORET(PPC_WINKLE)\n \n /*\n * r3 - PSSCR value corresponding to the requested stop state.\n@@ -316,7 +329,7 @@ power_enter_stop:\n \tandis. r4,r3,PSSCR_EC_ESL_MASK_SHIFTED\n \tclrldi r3,r3,60 /* r3 = Bits[60:63] = Requested Level (RL) */\n \tbne\t .Lhandle_esl_ec_set\n-\tIDLE_STATE_ENTER_SEQ(PPC_STOP)\n+\tPPC_STOP\n \tli\tr3,0 /* Since we didn't lose state, return 0 */\n \n \t/*\n@@ -349,7 +362,8 @@ power_enter_stop:\n \tld\tr4,ADDROFF(pnv_first_deep_stop_state)(r5)\n \tcmpd\tr3,r4\n \tbge\t.Lhandle_deep_stop\n-\tIDLE_STATE_ENTER_SEQ_NORET(PPC_STOP)\n+\tPPC_STOP\t/* Does not return (system reset interrupt) */\n+\n .Lhandle_deep_stop:\n /*\n * Entering deep idle state.\n@@ -371,7 +385,7 @@ lwarx_loop_stop:\n \n \tbl\tsave_sprs_to_stack\n \n-\tIDLE_STATE_ENTER_SEQ_NORET(PPC_STOP)\n+\tPPC_STOP\t/* Does not return (system reset interrupt) */\n \n /*\n * Entered with MSR[EE]=0 and no soft-masked interrupts pending.\n", "prefixes": [ "v3", "2/4" ] }