From patchwork Thu Jan 25 03:23:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaoyao Li X-Patchwork-Id: 13529979 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 lists.gnu.org (lists.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 5B2F2C47DDF for ; Thu, 25 Jan 2024 03:37:43 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rSqSy-0005tP-On; Wed, 24 Jan 2024 22:31:48 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rSqSa-0005Ho-7A for qemu-devel@nongnu.org; Wed, 24 Jan 2024 22:31:24 -0500 Received: from mgamail.intel.com ([192.198.163.10]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rSqSW-0001E0-IT for qemu-devel@nongnu.org; Wed, 24 Jan 2024 22:31:23 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1706153480; x=1737689480; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=X8zT+hRGFWRLG2SSYKlzsvTGhWc+CZMy8l1V5tc6R5U=; b=MYrXbv71wHeAfpnKa/QxH4tsdjGJsZx24KMseYzo1M7xLiIx8WVuPJov UFoF38mo+mypq9CAkuYZcv0EU56CkohVUN9Y8Yhteh70VHq3oR5w8JjRw HZ+sLqzHqEkWFxTS9xiopOMd9fvW7x7WbeRGxlreEzbCs3JuDXMIPsVel 5YLz6bmd4vCPT32V3js6St+6dzCiyCJD77RbmBIaC+GrmRjxybkV+C62J y4wDtWuvuNJxMv2gqznuGoEW/b6u2L6wdGr+nlXlsaOqxZXIJeqqJ0fei 082tysLkYKaq8XJfEncEWI5NaQg7oNiUpM4mhH9XJwz4Ys4RbvatIwbFu w==; X-IronPort-AV: E=McAfee;i="6600,9927,10962"; a="9430045" X-IronPort-AV: E=Sophos;i="6.05,216,1701158400"; d="scan'208";a="9430045" Received: from orviesa005.jf.intel.com ([10.64.159.145]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jan 2024 19:28:17 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.05,216,1701158400"; d="scan'208";a="2086124" Received: from lxy-clx-4s.sh.intel.com ([10.239.48.52]) by orviesa005.jf.intel.com with ESMTP; 24 Jan 2024 19:28:12 -0800 From: Xiaoyao Li To: Paolo Bonzini , David Hildenbrand , Igor Mammedov , "Michael S . Tsirkin" , Marcel Apfelbaum , Richard Henderson , Peter Xu , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Cornelia Huck , =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , Eric Blake , Markus Armbruster , Marcelo Tosatti Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, xiaoyao.li@intel.com, Michael Roth , Sean Christopherson , Claudio Fontana , Gerd Hoffmann , Isaku Yamahata , Chenyi Qiang Subject: [PATCH v4 51/66] i386/tdx: handle TDG.VP.VMCALL hypercall Date: Wed, 24 Jan 2024 22:23:13 -0500 Message-Id: <20240125032328.2522472-52-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240125032328.2522472-1-xiaoyao.li@intel.com> References: <20240125032328.2522472-1-xiaoyao.li@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.198.163.10; envelope-from=xiaoyao.li@intel.com; helo=mgamail.intel.com X-Spam_score_int: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.5, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HK_RANDOM_ENVFROM=0.999, HK_RANDOM_FROM=1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: 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 From: Isaku Yamahata MapGPA is a hypercall to convert GPA from/to private GPA to/from shared GPA. As the conversion function is already implemented as kvm_convert_memory, wire it to TDX hypercall exit. Signed-off-by: Isaku Yamahata Signed-off-by: Xiaoyao Li --- accel/kvm/kvm-all.c | 2 +- include/sysemu/kvm.h | 2 ++ target/i386/kvm/tdx.c | 54 +++++++++++++++++++++++++++++++++++++++++++ target/i386/kvm/tdx.h | 1 + 4 files changed, 58 insertions(+), 1 deletion(-) diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index eb8b3925dbe1..04309a8623d9 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -2920,7 +2920,7 @@ static void kvm_eat_signals(CPUState *cpu) } while (sigismember(&chkset, SIG_IPI)); } -static int kvm_convert_memory(hwaddr start, hwaddr size, bool to_private) +int kvm_convert_memory(hwaddr start, hwaddr size, bool to_private) { MemoryRegionSection section; ram_addr_t offset; diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h index 2f6592859ac6..e0061848b053 100644 --- a/include/sysemu/kvm.h +++ b/include/sysemu/kvm.h @@ -544,4 +544,6 @@ int kvm_create_guest_memfd(uint64_t size, uint64_t flags, Error **errp); int kvm_set_memory_attributes_private(hwaddr start, hwaddr size); int kvm_set_memory_attributes_shared(hwaddr start, hwaddr size); + +int kvm_convert_memory(hwaddr start, hwaddr size, bool to_private); #endif diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c index d27e775eec5d..f1c60274c448 100644 --- a/target/i386/kvm/tdx.c +++ b/target/i386/kvm/tdx.c @@ -884,6 +884,58 @@ static hwaddr tdx_shared_bit(X86CPU *cpu) return (cpu->phys_bits > 48) ? BIT_ULL(51) : BIT_ULL(47); } +/* 64MB at most in one call. What value is appropriate? */ +#define TDX_MAP_GPA_MAX_LEN (64 * 1024 * 1024) + +static int tdx_handle_map_gpa(X86CPU *cpu, struct kvm_tdx_vmcall *vmcall) +{ + hwaddr shared_bit = tdx_shared_bit(cpu); + hwaddr gpa = vmcall->in_r12 & ~shared_bit; + bool private = !(vmcall->in_r12 & shared_bit); + hwaddr size = vmcall->in_r13; + bool retry = false; + int ret = 0; + + vmcall->status_code = TDG_VP_VMCALL_INVALID_OPERAND; + + if (!QEMU_IS_ALIGNED(gpa, 4096) || !QEMU_IS_ALIGNED(size, 4096)) { + vmcall->status_code = TDG_VP_VMCALL_ALIGN_ERROR; + return 0; + } + + /* Overflow case. */ + if (gpa + size < gpa) { + return 0; + } + if (gpa >= (1ULL << cpu->phys_bits) || + gpa + size >= (1ULL << cpu->phys_bits)) { + return 0; + } + + if (size > TDX_MAP_GPA_MAX_LEN) { + retry = true; + size = TDX_MAP_GPA_MAX_LEN; + } + + if (size > 0) { + ret = kvm_convert_memory(gpa, size, private); + } + + if (!ret) { + if (retry) { + vmcall->status_code = TDG_VP_VMCALL_RETRY; + vmcall->out_r11 = gpa + size; + if (!private) { + vmcall->out_r11 |= shared_bit; + } + } else { + vmcall->status_code = TDG_VP_VMCALL_SUCCESS; + } + } + + return 0; +} + static void tdx_get_quote_completion(struct tdx_generate_quote_task *task) { int ret; @@ -1056,6 +1108,8 @@ static int tdx_handle_vmcall(X86CPU *cpu, struct kvm_tdx_vmcall *vmcall) } switch (vmcall->subfunction) { + case TDG_VP_VMCALL_MAP_GPA: + return tdx_handle_map_gpa(cpu, vmcall); case TDG_VP_VMCALL_GET_QUOTE: return tdx_handle_get_quote(cpu, vmcall); case TDG_VP_VMCALL_SETUP_EVENT_NOTIFY_INTERRUPT: diff --git a/target/i386/kvm/tdx.h b/target/i386/kvm/tdx.h index c6e4c275262d..cedc7d7e226f 100644 --- a/target/i386/kvm/tdx.h +++ b/target/i386/kvm/tdx.h @@ -18,6 +18,7 @@ typedef struct TdxGuestClass { ConfidentialGuestSupportClass parent_class; } TdxGuestClass; +#define TDG_VP_VMCALL_MAP_GPA 0x10001ULL #define TDG_VP_VMCALL_GET_QUOTE 0x10002ULL #define TDG_VP_VMCALL_SETUP_EVENT_NOTIFY_INTERRUPT 0x10004ULL