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 A324ACA6019 for ; Fri, 9 Oct 2026 08:46:02 +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=dSnohHHBpGGpGTNKjTwOu2NqWIBpAQaNGLki6PGnCsg=; b=GoFG97QJcCunmeTU3z4slQ3Tr4 CVObo5A3UprVh9Oqj+n8KaLa3wK0vwd3tlrqHwkGnRIo6sjor4ycxgI5Kt0+89pI+I4i9zbltly/o 3PWwDGXhVniHtkuq0jfABQ3+/oLZDbhF0GZnWKOp+ENX2717+UqJk4LErT75vfnYs1QjFiYEkcuQm LkjlDR0ZQG69lx6QvSLxh5wCslepbxveCe3TwaP8zb7qTws6VRmtnStYPbIN4lLXJ1AYVoRR1RqsX jKgoy5E4MF6J0mq5X4IuiXL7vE/kNUwxuXs9dcthxtjDGNNprqDweV5973D/wUkORA/kFI5HbCNyU jici79Jg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xF6Em-00000005qkr-0ktj; Fri, 09 Oct 2026 08:45:56 +0000 Received: from mail-wr1-x445.google.com ([2a00:1450:4864:20::445]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xF6Ef-00000005qg8-3VQn for linux-arm-kernel@lists.infradead.org; Fri, 09 Oct 2026 08:45:51 +0000 Received: by mail-wr1-x445.google.com with SMTP id ffacd0b85a97d-48c69bdeaacso3033420f8f.0 for ; Fri, 09 Oct 2026 01:45:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1791535548; x=1792140348; darn=lists.infradead.org; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:from:to:cc:subject:date:message-id:reply-to :content-type; bh=dSnohHHBpGGpGTNKjTwOu2NqWIBpAQaNGLki6PGnCsg=; b=EGPp0vaS7uMPGLfw+J2nLsnjyZ2IFMG2P6cEuPTZA34/H3eNh/jgN8ZUtUxwXL90j5 LFM435wtzvVAvjblETITBjxbE8d3MPFuPIxCmdTgDZ8RBB88RMEm4KzdaakLavIlXdNT l5OM9Y9QQWnmdGQhOxQI+/4BLu/SqP8NX7FlyBog8hFaUaLxMt8rasoK2/Hpusu83AlP ykbdJYhmvq2bHOPSB2sQ+luM4+kon99/3om2CmB9wS9745Oi9O2YszG19nshMp+UfbDG bz3FtzUOkKAN2IueTr6weNdRI4MjvACMCM3faUiAKSczmRPHyJczILXx5jDi5sgq50Z8 bAqg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1791535548; x=1792140348; h=content-type: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:content-type; bh=dSnohHHBpGGpGTNKjTwOu2NqWIBpAQaNGLki6PGnCsg=; b=LLtcM9Dy2+MrCXCvIfgVwGMQ4CXbpiaTUB6WhcGCqbZthI8ZdjzAQbag1TTtVM8Q2p uTKliJEzP/remRxCt0rIZJIdZPLDmsv4Tuv2gYJbpHzqp/mB5H9L0tvGrjK5MQb8tIX9 KT3rDL++/HT3gQzj8bMsdNl1rkny/24kXgaYbHtJxZ6oZxSC/+FVZy5Al3H01oFMUncP gl1yOCo0yTVxhzhqm1kNLUTXu3lxYh+8vyfbNB2zyvM8xvT7thqRHU6rgVLKwBsB/J52 BL1yAX6y+jMrJ5bOVEhqlIEiii/zqrYnnvWaOyGIvezSvhNRfbWXTXFDyPG7q7BtT/zO Dr4A== X-Forwarded-Encrypted: i=1; AKwUvByK1whOPOrVU8X75o8uDShLW9oVFHYDLMguygEB3T7/3lg7xKaeU+RF5IbqFEj0qhEROaOc9jH4V2I3DMgZTvyB@lists.infradead.org X-Gm-Message-State: AFuF++lLhMAzUAPkhCByC5/JEIXajpaId7pIMN03L9cXkYEewBYZ0ZZr x+/C8gJqHjVMBXIAw5BadMQC5mM/rcEpAqWQyZYOlU9qkSPQpiyakwiGSpH8BTiuc6kQXEabjyM 4iKgLvj7AtHHRNwH9irUzig== X-Received: from wmbev15.prod.google.com ([2002:a05:600c:800f:b0:4a1:7481:171e]) (user=vdonnefort job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:190a:b0:4a1:746e:589a with SMTP id 5b1f17b1804b1-4a18e4aea54mr22105455e9.18.1791535547899; Fri, 09 Oct 2026 01:45:47 -0700 (PDT) Date: Fri, 9 Oct 2026 09:45:28 +0100 In-Reply-To: <20261009084529.462577-1-vdonnefort@google.com> Mime-Version: 1.0 References: <20261009084529.462577-1-vdonnefort@google.com> X-Mailer: git-send-email 2.56.0.385.gd3acb90ef8-goog Message-ID: <20261009084529.462577-3-vdonnefort@google.com> Subject: [PATCH v1 2/3] KVM: arm64: Add guest_hvc hyp event From: Vincent Donnefort To: maz@kernel.org, oupton@kernel.org, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: joey.gouly@arm.com, seiden@linux.ibm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, catalin.marinas@arm.com, will@kernel.org, kernel-team@android.com, fuad.tabba@linux.dev, qperret@google.com, Vincent Donnefort Content-Type: text/plain; charset="UTF-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261009_014549_891766_4E097ADC X-CRM114-Status: GOOD ( 12.49 ) 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 guest_hvc hypervisor trace event to log protected VM HVC call IDs, return values, and whether the call was handled by the hypervisor. Signed-off-by: Vincent Donnefort --- arch/arm64/include/asm/kvm_hypevents.h | 16 ++++++++++++++++ arch/arm64/kvm/hyp/nvhe/pkvm.c | 7 ++++++- 2 files changed, 22 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/kvm_hypevents.h b/arch/arm64/include/asm/kvm_hypevents.h index 96985c93a15e..c1239d78c8f9 100644 --- a/arch/arm64/include/asm/kvm_hypevents.h +++ b/arch/arm64/include/asm/kvm_hypevents.h @@ -59,4 +59,20 @@ HYP_EVENT(selftest, ), RE_PRINTK("id=%llu", __entry->id) ); + +HYP_EVENT(guest_hvc, + HE_PROTO(u32 id, u64 val, u8 handled), + HE_STRUCT( + he_field(u8, handled) + he_field(u32, id) + he_field(u64, val) + ), + HE_ASSIGN( + __entry->id = id; + __entry->val = val; + __entry->handled = handled; + ), + HE_PRINTK("id=0x%x val=0x%llx handled=%u", + __entry->id, __entry->val, __entry->handled) +); #endif diff --git a/arch/arm64/kvm/hyp/nvhe/pkvm.c b/arch/arm64/kvm/hyp/nvhe/pkvm.c index 6290c4b62659..0deed0622677 100644 --- a/arch/arm64/kvm/hyp/nvhe/pkvm.c +++ b/arch/arm64/kvm/hyp/nvhe/pkvm.c @@ -10,6 +10,7 @@ #include #include +#include #include #include @@ -1142,9 +1143,10 @@ static void pkvm_memunshare_call(u64 *ret, struct kvm_vcpu *vcpu) bool kvm_handle_pvm_hvc64(struct kvm_vcpu *vcpu, u64 *exit_code) { u64 val[4] = { SMCCC_RET_INVALID_PARAMETER }; + u32 fn = smccc_get_function(vcpu); bool handled = true; - switch (smccc_get_function(vcpu)) { + switch (fn) { case ARM_SMCCC_VENDOR_HYP_KVM_FEATURES_FUNC_ID: val[0] = BIT(ARM_SMCCC_KVM_FUNC_FEATURES); val[0] |= BIT(ARM_SMCCC_KVM_FUNC_HYP_MEMINFO); @@ -1183,5 +1185,8 @@ bool kvm_handle_pvm_hvc64(struct kvm_vcpu *vcpu, u64 *exit_code) if (handled) smccc_set_retval(vcpu, val[0], val[1], val[2], val[3]); + + trace_guest_hvc(fn, val[0], handled); + return handled; } -- 2.56.0.385.gd3acb90ef8-goog