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 lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) (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 3C48EC5516D for ; Fri, 31 Jul 2026 05:58:19 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wpgFe-0002hJ-Os; Fri, 31 Jul 2026 01:57:46 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wpeM5-0005rD-T3; Thu, 30 Jul 2026 23:56:18 -0400 Received: from [115.124.30.110] (helo=out30-110.freemail.mail.aliyun.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wpeM0-0002Hx-Dm; Thu, 30 Jul 2026 23:56:17 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1785470160; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=15tpbU1mysjnRBqCkIU57nhoO42MnKRFA/va3zirTrU=; b=VSmTtRMZvWR9SdOeFy5R0kDUZFi64Kkk3gbRKjnmVWmDlm5aXmbwzn2Jsn4xTNJ7boVb0cr3E5OTr6KGxH479L7cl0dvQ+kTOCGPi1I9jMzXGWPhaIQFDVVJgSast0g38EFZpJ4k3MwM6dTbrjxN0JiTThqxHwRxv3PrFK+8SaI= X-Alimail-AntiSpam: AC=PASS; BC=-1|-1; BR=01201311R131e4; CH=green; DM=||false|; DS=||; FP=0|-1|-1|-1|0|-1|-1|-1; HT=maildocker-contentspam033045133197; MF=blduan@linux.alibaba.com; NM=1; PH=DS; RN=7; SR=0; TI=SMTPD_---0X86jwRu_1785469848; Received: from ea134-sw16.eng.xrvm.cn(mailfrom:blduan@linux.alibaba.com fp:SMTPD_---0X86jwRu_1785469848 cluster:ay36) by smtp.aliyun-inc.com; Fri, 31 Jul 2026 11:50:49 +0800 From: Baolong Duan To: qemu-devel@nongnu.org Cc: qemu-riscv@nongnu.org, alistair23@gmail.com, dbarboza@ventanamicro.com, cxx194832@alibaba-inc.com, zengxiangyi.zxy@alibaba-inc.com, Baolong Duan Subject: [RFC PATCH v1 04/17] accel/kvm: add kvm_gpa_to_userspace_addr() Date: Fri, 31 Jul 2026 11:49:58 +0800 Message-Id: <20260731035011.4178103-5-blduan@linux.alibaba.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260731035011.4178103-1-blduan@linux.alibaba.com> References: <20260731035011.4178103-1-blduan@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Host-Lookup-Failed: Reverse DNS lookup failed for 115.124.30.110 (deferred) Received-SPF: pass client-ip=115.124.30.110; envelope-from=blduan@linux.alibaba.com; helo=out30-110.freemail.mail.aliyun.com X-Spam_score_int: -166 X-Spam_score: -16.7 X-Spam_bar: ---------------- X-Spam_report: (-16.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, ENV_AND_HDR_SPF_MATCH=-0.5, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, UNPARSEABLE_RELAY=0.001, USER_IN_DEF_DKIM_WL=-7.5, USER_IN_DEF_SPF_WL=-7.5 autolearn=no autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Fri, 31 Jul 2026 01:57:32 -0400 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Translate a guest physical address into the host userspace address backing it by walking the memory slots of the accelerator. The RISC-V CoVE code needs this to tell the TSM which host memory holds the guest images that have to be measured. Signed-off-by: Baolong Duan --- accel/kvm/kvm-all.c | 21 +++++++++++++++++++++ include/system/kvm.h | 18 ++++++++++++++++++ 2 files changed, 39 insertions(+) diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index 83cbd120a8..005abb1c54 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -366,6 +366,27 @@ int kvm_physical_memory_addr_from_host(KVMState *s, void *ram, return ret; } +void *kvm_gpa_to_userspace_addr(KVMState *s, hwaddr gpa) +{ + KVMMemoryListener *kml = &s->memory_listener; + void *result = NULL; + int i; + KVMSlot *mem; + + kvm_slots_lock(); + for (i = 0; i < kml->nr_slots_allocated; i++) { + mem = &kml->slots[i]; + if (gpa >= mem->start_addr && + gpa < mem->start_addr + mem->memory_size) { + result = mem->ram + (gpa - mem->start_addr); + break; + } + } + kvm_slots_unlock(); + + return result; +} + static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot, bool new) { KVMState *s = kvm_state; diff --git a/include/system/kvm.h b/include/system/kvm.h index 714b8c7b01..67a0b9f7ac 100644 --- a/include/system/kvm.h +++ b/include/system/kvm.h @@ -454,6 +454,24 @@ void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len); int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr, hwaddr *phys_addr); +/** + * kvm_gpa_to_userspace_addr: + * @s: #KVMState + * @gpa: guest physical address + * + * Returns the host userspace address @gpa is backed by, or NULL if @gpa is + * not covered by any memory slot. + */ +#ifdef CONFIG_KVM +void *kvm_gpa_to_userspace_addr(KVMState *s, hwaddr gpa); +#else +static inline void *kvm_gpa_to_userspace_addr(KVMState *s, hwaddr gpa) +{ + /* Without KVM there are no memory slots to look up. */ + return NULL; +} +#endif + #endif /* COMPILING_PER_TARGET */ bool kvm_arch_supports_vmfd_change(void); -- 2.34.1