From patchwork Mon Jan 29 09:25:50 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yu-Chien Peter Lin X-Patchwork-Id: 13535288 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 E99ECC47DA9 for ; Mon, 29 Jan 2024 09:28:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=UYWfrvuSVmvwwAJubRz8KBiICZiwBuClotSH+R4e7HY=; b=IAyqCXwDglmzZo ZxvjEzfWKNokjwpPS3Ph4Hc/eWUmKDuyFeewEfmcAHcbq9b0yTHP1D5YODSdRsKCjigc+CqFLjf6H nWKPnZq0tSoItXAO5UXoLn/Q4Nfzmrr6ZMuc2dtkYHXm+XasnrO5KN4ONUXiMdOQYAb9l5RVtYoR6 AwBIkpnOjAKWMpYSgT/jQeqzlqmI0p6vKlvgZ07I5aXf0xf6w23ZFol7nbS+7uJJOd10MMMD2OvSG Ct8l6snR8Q9BKLEnMRdW4SQhaZQRhDAilETIHcWX3+VPEVYbCBvZty6hjUw2VcQy3eIrGongmx4Jt 4u8X9mH/ADXX7FB0Zczg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rUNvw-0000000C1B8-1pyM; Mon, 29 Jan 2024 09:28:04 +0000 Received: from 60-248-80-70.hinet-ip.hinet.net ([60.248.80.70] helo=Atcsqr.andestech.com) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rUNvX-0000000C0r6-297k; Mon, 29 Jan 2024 09:27:41 +0000 Received: from mail.andestech.com (ATCPCS16.andestech.com [10.0.1.222]) by Atcsqr.andestech.com with ESMTP id 40T9QZcP080231; Mon, 29 Jan 2024 17:26:35 +0800 (+08) (envelope-from peterlin@andestech.com) Received: from swlinux02.andestech.com (10.0.15.183) by ATCPCS16.andestech.com (10.0.1.222) with Microsoft SMTP Server id 14.3.498.0; Mon, 29 Jan 2024 17:26:31 +0800 From: Yu Chien Peter Lin To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , CC: Charles Ci-Jyun Wu , Leo Yu-Chi Liang Subject: [PATCH v8 07/10] perf: RISC-V: Introduce Andes PMU to support perf event sampling Date: Mon, 29 Jan 2024 17:25:50 +0800 Message-ID: <20240129092553.2058043-8-peterlin@andestech.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240129092553.2058043-1-peterlin@andestech.com> References: <20240129092553.2058043-1-peterlin@andestech.com> MIME-Version: 1.0 X-Originating-IP: [10.0.15.183] X-DNSRBL: X-MAIL: Atcsqr.andestech.com 40T9QZcP080231 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240129_012740_043282_7FFA968E X-CRM114-Status: GOOD ( 19.45 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Assign riscv_pmu_irq_num the value of (256 + 18) for the custome PMU and add SSCOUNTOVF and SIP alternatives to ALT_SBI_PMU_OVERFLOW() and ALT_SBI_PMU_OVF_CLEAR_PENDING() macros, respectively. To make use of Andes PMU extension, "xandespmu" needs to be appended to the riscv,isa-extensions for each cpu node in device-tree, and make sure CONFIG_ANDES_CUSTOM_PMU is enabled. Signed-off-by: Yu Chien Peter Lin Reviewed-by: Charles Ci-Jyun Wu Reviewed-by: Leo Yu-Chi Liang Co-developed-by: Locus Wei-Han Chen Signed-off-by: Locus Wei-Han Chen Reviewed-by: Lad Prabhakar Tested-by: Lad Prabhakar --- Changes v1 -> v2: - New patch Changes v2 -> v3: - Reordered list in riscv_isa_ext[] - Removed mvendorid check in pmu_sbi_setup_irqs() Changes v3 -> v4: - No change Changes v4 -> v5: - Let ANDES_CUSTOM_PMU depend on ARCH_RENESAS - Include Prabhakar's Reviewed/Tested-by Changes v5 -> v6: - No change Changes v6 -> v7: - No change Changes v7 -> v8: - No change --- arch/riscv/include/asm/errata_list.h | 9 ------- arch/riscv/include/asm/hwcap.h | 1 + arch/riscv/kernel/cpufeature.c | 1 + drivers/perf/Kconfig | 14 +++++++++++ drivers/perf/riscv_pmu_sbi.c | 35 +++++++++++++++++++++++++--- 5 files changed, 48 insertions(+), 12 deletions(-) diff --git a/arch/riscv/include/asm/errata_list.h b/arch/riscv/include/asm/errata_list.h index 96025eec5631..1f2dbfb8a8bf 100644 --- a/arch/riscv/include/asm/errata_list.h +++ b/arch/riscv/include/asm/errata_list.h @@ -112,15 +112,6 @@ asm volatile(ALTERNATIVE( \ #define THEAD_C9XX_RV_IRQ_PMU 17 #define THEAD_C9XX_CSR_SCOUNTEROF 0x5c5 -#define ALT_SBI_PMU_OVERFLOW(__ovl) \ -asm volatile(ALTERNATIVE( \ - "csrr %0, " __stringify(CSR_SSCOUNTOVF), \ - "csrr %0, " __stringify(THEAD_C9XX_CSR_SCOUNTEROF), \ - THEAD_VENDOR_ID, ERRATA_THEAD_PMU, \ - CONFIG_ERRATA_THEAD_PMU) \ - : "=r" (__ovl) : \ - : "memory") - #endif /* __ASSEMBLY__ */ #endif diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h index 5340f818746b..bae7eac76c18 100644 --- a/arch/riscv/include/asm/hwcap.h +++ b/arch/riscv/include/asm/hwcap.h @@ -80,6 +80,7 @@ #define RISCV_ISA_EXT_ZFA 71 #define RISCV_ISA_EXT_ZTSO 72 #define RISCV_ISA_EXT_ZACAS 73 +#define RISCV_ISA_EXT_XANDESPMU 74 #define RISCV_ISA_EXT_MAX 128 #define RISCV_ISA_EXT_INVALID U32_MAX diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c index 89920f84d0a3..0c7688fa8376 100644 --- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -307,6 +307,7 @@ const struct riscv_isa_ext_data riscv_isa_ext[] = { __RISCV_ISA_EXT_DATA(svinval, RISCV_ISA_EXT_SVINVAL), __RISCV_ISA_EXT_DATA(svnapot, RISCV_ISA_EXT_SVNAPOT), __RISCV_ISA_EXT_DATA(svpbmt, RISCV_ISA_EXT_SVPBMT), + __RISCV_ISA_EXT_DATA(xandespmu, RISCV_ISA_EXT_XANDESPMU), }; const size_t riscv_isa_ext_count = ARRAY_SIZE(riscv_isa_ext); diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig index ec6e0d9194a1..564e813d8c69 100644 --- a/drivers/perf/Kconfig +++ b/drivers/perf/Kconfig @@ -86,6 +86,20 @@ config RISCV_PMU_SBI full perf feature support i.e. counter overflow, privilege mode filtering, counter configuration. +config ANDES_CUSTOM_PMU + bool "Andes custom PMU support" + depends on ARCH_RENESAS && RISCV_ALTERNATIVE && RISCV_PMU_SBI + default y + help + The Andes cores implement the PMU overflow extension very + similar to the standard Sscofpmf and Smcntrpmf extension. + + This will patch the overflow and pending CSRs and handle the + non-standard behaviour via the regular SBI PMU driver and + interface. + + If you don't know what to do here, say "Y". + config ARM_PMU_ACPI depends on ARM_PMU && ACPI def_bool y diff --git a/drivers/perf/riscv_pmu_sbi.c b/drivers/perf/riscv_pmu_sbi.c index 2edbc37abadf..bbd6fe021b3a 100644 --- a/drivers/perf/riscv_pmu_sbi.c +++ b/drivers/perf/riscv_pmu_sbi.c @@ -19,11 +19,33 @@ #include #include #include +#include #include #include #include +#define ALT_SBI_PMU_OVERFLOW(__ovl) \ +asm volatile(ALTERNATIVE_2( \ + "csrr %0, " __stringify(CSR_SSCOUNTOVF), \ + "csrr %0, " __stringify(THEAD_C9XX_CSR_SCOUNTEROF), \ + THEAD_VENDOR_ID, ERRATA_THEAD_PMU, \ + CONFIG_ERRATA_THEAD_PMU, \ + "csrr %0, " __stringify(ANDES_CSR_SCOUNTEROF), \ + 0, RISCV_ISA_EXT_XANDESPMU, \ + CONFIG_ANDES_CUSTOM_PMU) \ + : "=r" (__ovl) : \ + : "memory") + +#define ALT_SBI_PMU_OVF_CLEAR_PENDING(__irq_mask) \ +asm volatile(ALTERNATIVE( \ + "csrc " __stringify(CSR_IP) ", %0\n\t", \ + "csrc " __stringify(ANDES_CSR_SLIP) ", %0\n\t", \ + 0, RISCV_ISA_EXT_XANDESPMU, \ + CONFIG_ANDES_CUSTOM_PMU) \ + : : "r"(__irq_mask) \ + : "memory") + #define SYSCTL_NO_USER_ACCESS 0 #define SYSCTL_USER_ACCESS 1 #define SYSCTL_LEGACY 2 @@ -61,6 +83,7 @@ static int sysctl_perf_user_access __read_mostly = SYSCTL_USER_ACCESS; static union sbi_pmu_ctr_info *pmu_ctr_list; static bool riscv_pmu_use_irq; static unsigned int riscv_pmu_irq_num; +static unsigned int riscv_pmu_irq_mask; static unsigned int riscv_pmu_irq; /* Cache the available counters in a bitmask */ @@ -694,7 +717,7 @@ static irqreturn_t pmu_sbi_ovf_handler(int irq, void *dev) event = cpu_hw_evt->events[fidx]; if (!event) { - csr_clear(CSR_SIP, BIT(riscv_pmu_irq_num)); + ALT_SBI_PMU_OVF_CLEAR_PENDING(riscv_pmu_irq_mask); return IRQ_NONE; } @@ -708,7 +731,7 @@ static irqreturn_t pmu_sbi_ovf_handler(int irq, void *dev) * Overflow interrupt pending bit should only be cleared after stopping * all the counters to avoid any race condition. */ - csr_clear(CSR_SIP, BIT(riscv_pmu_irq_num)); + ALT_SBI_PMU_OVF_CLEAR_PENDING(riscv_pmu_irq_mask); /* No overflow bit is set */ if (!overflow) @@ -780,7 +803,7 @@ static int pmu_sbi_starting_cpu(unsigned int cpu, struct hlist_node *node) if (riscv_pmu_use_irq) { cpu_hw_evt->irq = riscv_pmu_irq; - csr_clear(CSR_IP, BIT(riscv_pmu_irq_num)); + ALT_SBI_PMU_OVF_CLEAR_PENDING(riscv_pmu_irq_mask); enable_percpu_irq(riscv_pmu_irq, IRQ_TYPE_NONE); } @@ -814,8 +837,14 @@ static int pmu_sbi_setup_irqs(struct riscv_pmu *pmu, struct platform_device *pde riscv_cached_mimpid(0) == 0) { riscv_pmu_irq_num = THEAD_C9XX_RV_IRQ_PMU; riscv_pmu_use_irq = true; + } else if (riscv_isa_extension_available(NULL, XANDESPMU) && + IS_ENABLED(CONFIG_ANDES_CUSTOM_PMU)) { + riscv_pmu_irq_num = ANDES_SLI_CAUSE_BASE + ANDES_RV_IRQ_PMOVI; + riscv_pmu_use_irq = true; } + riscv_pmu_irq_mask = BIT(riscv_pmu_irq_num % BITS_PER_LONG); + if (!riscv_pmu_use_irq) return -EOPNOTSUPP;