From patchwork Thu Mar 28 03:12:19 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shenlin Liang X-Patchwork-Id: 13607927 Received: from zg8tmja5ljk3lje4ms43mwaa.icoremail.net (zg8tmja5ljk3lje4ms43mwaa.icoremail.net [209.97.181.73]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 5DF821C680; Thu, 28 Mar 2024 03:20:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.97.181.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711596026; cv=none; b=QLZNggBduo85VkQ6WN43/yNEWa+MjbJz4ODHvcaoXILKsv72l9TgmqOuw97/suGse7bdaCb+ISh+cxCrxn1QaY1uJjjhyeRhWtFpk5gaYTw8DGfS65nB3DOvQ25t/NAmyHToy0eyFfVhDO5XBy+0KOO8VveNydU/s59+jCdQUFM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711596026; c=relaxed/simple; bh=lK/aYNgNeC3tGBp/BVxjGcGiyPKFhFWCXSbJr7n/9Mc=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=aoicRmz3ujElWe2BS7z4BlAwGZ7i1sk1AYaU84y0lnhX9jzmeKJ25u8Yj/mBzR5t/1b4dawvq40wkN9fwFrLXE1vhF3wTay99ANZdXllzx2S0mzGWEuNEcAJjCL8FeZqu8hUxhRD9AUcoUbL2k5vE/yuUBWAmz4CPzpQJ3QOzfA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=eswincomputing.com; spf=pass smtp.mailfrom=eswincomputing.com; arc=none smtp.client-ip=209.97.181.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=eswincomputing.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=eswincomputing.com Received: from localhost.localdomain (unknown [10.12.130.31]) by app1 (Coremail) with SMTP id TAJkCgDniOWq4QRmwD8DAA--.28501S5; Thu, 28 Mar 2024 11:19:09 +0800 (CST) From: Shenlin Liang To: anup@brainfault.org, atishp@atishpatra.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, peterz@infradead.org, mingo@redhat.com, acme@kernel.org, namhyung@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, irogers@google.com, adrian.hunter@intel.com, linux-perf-users@vger.kernel.org Cc: Shenlin Liang Subject: [PATCH 1/2] RISCV: KVM: add tracepoints for entry and exit events Date: Thu, 28 Mar 2024 03:12:19 +0000 Message-Id: <20240328031220.1287-2-liangshenlin@eswincomputing.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240328031220.1287-1-liangshenlin@eswincomputing.com> References: <20240328031220.1287-1-liangshenlin@eswincomputing.com> X-CM-TRANSID: TAJkCgDniOWq4QRmwD8DAA--.28501S5 X-Coremail-Antispam: 1UD129KBjvJXoWxXFWfJF15Cry5AFy7uw1xKrg_yoW5AFyrpF 1Dur98W3yrJrW7C34fZwnYgr45Zr9Y9r17try7WrW5Jr4vyF1kJrsagFWDtry5Ary09a4S vF95WFyqk3W5XaUanT9S1TB71UUUUUDqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUml14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_Jr4l82xGYIkIc2 x26xkF7I0E14v26r4j6ryUM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0 Y4vE2Ix0cI8IcVAFwI0_tr0E3s1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJw A2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq3wAS 0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2 IY67AKxVWUXVWUAwAv7VC2z280aVAFwI0_Gr0_Cr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0 Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628vn2kIc2 xKxwCY02Avz4vE-syl42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1l4IxY O2xFxVAFwI0_Jw0_GFylx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGV WUWwC2zVAF1VAY17CE14v26r4a6rW5MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_ JFI_Gr1lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rV WUJVWUCwCI42IY6I8E87Iv67AKxVW8JVWxJwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4U JbIYCTnIWIevJa73UjIFyTuYvjfUbpnQUUUUU X-CM-SenderInfo: xold0whvkh0z1lq6v25zlqu0xpsx3x1qjou0bp/ Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Like other architectures, RISCV KVM also needs to add these event tracepoints to count the number of times kvm guest entry/exit. Signed-off-by: Shenlin Liang --- arch/riscv/kvm/trace_riscv.h | 60 ++++++++++++++++++++++++++++++++++++ arch/riscv/kvm/vcpu.c | 7 +++++ 2 files changed, 67 insertions(+) create mode 100644 arch/riscv/kvm/trace_riscv.h diff --git a/arch/riscv/kvm/trace_riscv.h b/arch/riscv/kvm/trace_riscv.h new file mode 100644 index 000000000000..5848083c7a5e --- /dev/null +++ b/arch/riscv/kvm/trace_riscv.h @@ -0,0 +1,60 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Tracepoints for RISC-V KVM + * + * Copyright 2024 Beijing ESWIN Computing Technology Co., Ltd. + * + */ +#if !defined(_TRACE_RSICV_KVM_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_RSICV_KVM_H + +#include + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM kvm + +TRACE_EVENT(kvm_entry, + TP_PROTO(struct kvm_vcpu *vcpu), + TP_ARGS(vcpu), + + TP_STRUCT__entry( + __field(unsigned long, pc) + ), + + TP_fast_assign( + __entry->pc = vcpu->arch.guest_context.sepc; + ), + + TP_printk("PC: 0x%016lx", __entry->pc) +); + +TRACE_EVENT(kvm_exit, + TP_PROTO(struct kvm_vcpu *vcpu, unsigned long exit_reason, + unsigned long scause), + TP_ARGS(vcpu, exit_reason, scause), + + TP_STRUCT__entry( + __field(unsigned long, pc) + __field(unsigned long, exit_reason) + __field(unsigned long, scause) + ), + + TP_fast_assign( + __entry->pc = vcpu->arch.guest_context.sepc; + __entry->exit_reason = exit_reason; + __entry->scause = scause; + ), + + TP_printk("EXIT_REASON:0x%lx,PC: 0x%016lx,SCAUSE:0x%lx", + __entry->exit_reason, __entry->pc, __entry->scause) +); + +#endif /* _TRACE_RSICV_KVM_H */ + +#undef TRACE_INCLUDE_PATH +#define TRACE_INCLUDE_PATH . +#undef TRACE_INCLUDE_FILE +#define TRACE_INCLUDE_FILE trace_riscv + +/* This part must be outside protection */ +#include diff --git a/arch/riscv/kvm/vcpu.c b/arch/riscv/kvm/vcpu.c index b5ca9f2e98ac..ed0932f0d514 100644 --- a/arch/riscv/kvm/vcpu.c +++ b/arch/riscv/kvm/vcpu.c @@ -21,6 +21,9 @@ #include #include +#define CREATE_TRACE_POINTS +#include "trace_riscv.h" + const struct _kvm_stats_desc kvm_vcpu_stats_desc[] = { KVM_GENERIC_VCPU_STATS(), STATS_DESC_COUNTER(VCPU, ecall_exit_stat), @@ -782,6 +785,8 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) */ kvm_riscv_local_tlb_sanitize(vcpu); + trace_kvm_entry(vcpu); + guest_timing_enter_irqoff(); kvm_riscv_vcpu_enter_exit(vcpu); @@ -820,6 +825,8 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) local_irq_enable(); + trace_kvm_exit(vcpu, run->exit_reason, trap.scause); + preempt_enable(); kvm_vcpu_srcu_read_lock(vcpu);