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 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 CF843D7976B for ; Sat, 31 Jan 2026 13:31:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:Cc:To:From: Subject:Message-ID:References:Mime-Version:In-Reply-To:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=JeFGHpGUZmExC+IpkIdtjA9N9gKTbIl9waldaXKaMEk=; b=sFrJjS+iQ+GkzkiC85pFuVX4Gl 2iEggcbXQrmAi7za5G/kyc9xkP67praoZbSdwY4vDquwVwoQ7C8X/sJVZEtQE+1ILbB1OxEoclqRM Z9DQXf/PY6SMp+X2f2cSSSogPg/9PWrxgxNASalSKOyQL9+EM1yVaV2JJ4SuIqfnHwLKJ9PaOAGfM JLIy9gWzstDhC2QcUnBccvwuPSpoUayS5ym+KYHWLiCWqtnb5CTZh+AWaOCDxfbK2OMreb3P+3rCL iNBXqAASPbTK2jYAmrPiH6+vBnioDS9UG9VJgkytFXoViaH+Ib7NKfeVJW/kqdirRD4921+SfrIsc 2Sw69dpg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vmB4L-00000002dEj-3KqM; Sat, 31 Jan 2026 13:31:21 +0000 Received: from mail-wr1-x44a.google.com ([2a00:1450:4864:20::44a]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vmB2w-00000002c9H-1LgL for linux-arm-kernel@lists.infradead.org; Sat, 31 Jan 2026 13:29:56 +0000 Received: by mail-wr1-x44a.google.com with SMTP id ffacd0b85a97d-43065ad16a8so2315407f8f.1 for ; Sat, 31 Jan 2026 05:29:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1769866189; x=1770470989; darn=lists.infradead.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=JeFGHpGUZmExC+IpkIdtjA9N9gKTbIl9waldaXKaMEk=; b=pRqB1IAWj18KxwiF9Z/2bGY3Yl+1g9Tb2qIY/0t3mgVXZ8JzMVe4+UNkeDXiyj4k2S FefFMQTxv4RlqVmGR6p5Qf5SVNpYiqJ0XhGzBhELV/9RXyIu9JwcHsOw3Wx3+R+tzVbk 0UPz1oHowGYMf/L0+4hMBtmk0xe3pKzXeCNZdWypLiTGJzcY56exo1/b0a68j8JqVmFK rcqxtOdbL2eEpMhXxd/sk6AAFA4l9YB9vySMYqyegOLG4E+Y/qhamNYK7PGvR1lg4Yy4 SrWzTur6jraWkrujzxyjlUUtLjRbKDGrewBZrgTs7lop1Vce23+kpvCxE+RtSIV22fEB hcLA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1769866189; x=1770470989; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=JeFGHpGUZmExC+IpkIdtjA9N9gKTbIl9waldaXKaMEk=; b=Bl2o465/W7GjTfWmf8CYjffcHDlxlIB/pnPvx84tD7Hh87rpAYZiKL2QqXfNn33f6E sm1d0XcLGL5w+QB6iE6aSnDtE+ewUsh4ZnEuqFkG6t55S3XIBbWkLc9rs/rmootGD8gg 26HZ6oOOe5U22X1ujnP5iraQxh8GSg5W8YbuWFtvz9XqrQOXMBOO5JS7Fji8+rAQN4fX s1YCTnX+GNlTe08JMyVCpIosQdQ3RcqleU4MTAnbqwCLjTXeVjDL5n8t4uS15fwMSSAB TSwmeAfZWtwezKlzse5AhPN2ILJfe+/M+DzbGVAVDuMkm8/ynj+zwi/OI5GiIFlGY/BQ 0vsQ== X-Forwarded-Encrypted: i=1; AJvYcCUb52T3DcrGlA3skV9c6/t/IIeShdt9cH9b8+kZdb+aC/R9g7L44jDk2RjKG+9ktrXz4nc0hY05GFCySpcv/6vC@lists.infradead.org X-Gm-Message-State: AOJu0YzFGYqu0g8869bYgcZw9MXKNcfMK0Fgl0REfMsoKYQ+Yy2BZa6T mHkB/S2U0Sa1tzetdEki7PLPoN+4ryvwh1KmFUKiUHyz7/xYfNXSSxtDscIjtF9MOfwxG2Z5aqF KO1Jx4wXANItE51awlPa6bg== X-Received: from wrbfu10.prod.google.com ([2002:a05:6000:25ea:b0:435:c163:9abb]) (user=vdonnefort job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6000:420d:b0:435:960c:5286 with SMTP id ffacd0b85a97d-435f3aba816mr8778061f8f.58.1769866189345; Sat, 31 Jan 2026 05:29:49 -0800 (PST) Date: Sat, 31 Jan 2026 13:28:47 +0000 In-Reply-To: <20260131132848.254084-1-vdonnefort@google.com> Mime-Version: 1.0 References: <20260131132848.254084-1-vdonnefort@google.com> X-Mailer: git-send-email 2.53.0.rc1.225.gd81095ad13-goog Message-ID: <20260131132848.254084-30-vdonnefort@google.com> Subject: [PATCH v11 29/30] KVM: arm64: Add selftest event support to nVHE/pKVM hyp From: Vincent Donnefort To: rostedt@goodmis.org, mhiramat@kernel.org, mathieu.desnoyers@efficios.com, linux-trace-kernel@vger.kernel.org, maz@kernel.org, oliver.upton@linux.dev, joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com Cc: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, jstultz@google.com, qperret@google.com, will@kernel.org, aneesh.kumar@kernel.org, kernel-team@android.com, linux-kernel@vger.kernel.org, Vincent Donnefort Content-Type: text/plain; charset="UTF-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260131_052954_456280_0ADC556C X-CRM114-Status: UNSURE ( 9.91 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add a selftest event that can be triggered from a `write_event` tracefs file. This intends to be used by trace remote selftests. Signed-off-by: Vincent Donnefort diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h index f8fa556ec3e1..c045c074614b 100644 --- a/arch/arm64/include/asm/kvm_asm.h +++ b/arch/arm64/include/asm/kvm_asm.h @@ -96,6 +96,7 @@ enum __kvm_host_smccc_func { __KVM_HOST_SMCCC_FUNC___tracing_update_clock, __KVM_HOST_SMCCC_FUNC___tracing_reset, __KVM_HOST_SMCCC_FUNC___tracing_enable_event, + __KVM_HOST_SMCCC_FUNC___tracing_write_event, }; #define DECLARE_KVM_VHE_SYM(sym) extern char sym[] diff --git a/arch/arm64/include/asm/kvm_hypevents.h b/arch/arm64/include/asm/kvm_hypevents.h index 221a1dacb2f0..743c49bd878f 100644 --- a/arch/arm64/include/asm/kvm_hypevents.h +++ b/arch/arm64/include/asm/kvm_hypevents.h @@ -46,4 +46,15 @@ HYP_EVENT(hyp_exit, ), HE_PRINTK("reason=%s vcpu=%d", __hyp_enter_exit_reason_str(__entry->reason), __entry->vcpu) ); + +HYP_EVENT(selftest, + HE_PROTO(u64 id), + HE_STRUCT( + he_field(u64, id) + ), + HE_ASSIGN( + __entry->id = id; + ), + RE_PRINTK("id=%llu", __entry->id) +); #endif diff --git a/arch/arm64/kvm/hyp/nvhe/hyp-main.c b/arch/arm64/kvm/hyp/nvhe/hyp-main.c index e1d4a53260ff..5655c1690f4a 100644 --- a/arch/arm64/kvm/hyp/nvhe/hyp-main.c +++ b/arch/arm64/kvm/hyp/nvhe/hyp-main.c @@ -643,6 +643,13 @@ static void handle___tracing_enable_event(struct kvm_cpu_context *host_ctxt) cpu_reg(host_ctxt, 1) = __tracing_enable_event(id, enable); } +static void handle___tracing_write_event(struct kvm_cpu_context *host_ctxt) +{ + DECLARE_REG(u64, id, host_ctxt, 1); + + trace_selftest(id); +} + typedef void (*hcall_t)(struct kvm_cpu_context *); #define HANDLE_FUNC(x) [__KVM_HOST_SMCCC_FUNC_##x] = (hcall_t)handle_##x @@ -691,6 +698,7 @@ static const hcall_t host_hcall[] = { HANDLE_FUNC(__tracing_update_clock), HANDLE_FUNC(__tracing_reset), HANDLE_FUNC(__tracing_enable_event), + HANDLE_FUNC(__tracing_write_event), }; static void handle_host_hcall(struct kvm_cpu_context *host_ctxt) diff --git a/arch/arm64/kvm/hyp_trace.c b/arch/arm64/kvm/hyp_trace.c index 1ad6a55ba95c..c1e28f6581ab 100644 --- a/arch/arm64/kvm/hyp_trace.c +++ b/arch/arm64/kvm/hyp_trace.c @@ -348,8 +348,30 @@ static int hyp_trace_clock_show(struct seq_file *m, void *v) } DEFINE_SHOW_ATTRIBUTE(hyp_trace_clock); +static ssize_t hyp_trace_write_event_write(struct file *f, const char __user *ubuf, + size_t cnt, loff_t *pos) +{ + unsigned long val; + int ret; + + ret = kstrtoul_from_user(ubuf, cnt, 10, &val); + if (ret) + return ret; + + kvm_call_hyp_nvhe(__tracing_write_event, val); + + return cnt; +} + +static const struct file_operations hyp_trace_write_event_fops = { + .write = hyp_trace_write_event_write, +}; + static int hyp_trace_init_tracefs(struct dentry *d, void *priv) { + if (!tracefs_create_file("write_event", 0200, d, NULL, &hyp_trace_write_event_fops)) + return -ENOMEM; + return tracefs_create_file("trace_clock", 0440, d, NULL, &hyp_trace_clock_fops) ? 0 : -ENOMEM; } -- 2.53.0.rc1.225.gd81095ad13-goog