From patchwork Mon Nov 11 10:39:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Huang, Kai" X-Patchwork-Id: 13870569 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 519ED17C7BD; Mon, 11 Nov 2024 10:40:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731321629; cv=none; b=LSp7KL9qILJdQKo/2pn/7VEJ3GciS5snm0a7VAtMc3qZLUvwhf0/d3VghyYwOhAznykwTpl7IQZ6fdALjrPTJhyM4qfLHu6RZCjT6HA1UcQQB2yMUdUtEq9fiyjendTitMwMBDQTRLjCwjfSX5ICYbV8Q18B91ygMC0NbOxOyFA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731321629; c=relaxed/simple; bh=MiDuW3xv90eOoJn+KPKLwF+2gnSv91ApeTBM2COmSK8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=olqzx9EfuQdgtkqi59NgKn/5+qYESZGGQ7DC0xuhrGr0ePUYVyDLBEoeuE7jXUUul0CuvXpYA5LMsJcCj5I/o/FSciBeQvHZrJ1V1kFvpoKjh7qW43+JwbALCMOjrzE4gAVwN2/+eGduh09khwz9ji/mgfRIwn4pSj8sUxo8IEs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=Q8ssbYll; arc=none smtp.client-ip=198.175.65.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="Q8ssbYll" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1731321629; x=1762857629; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=MiDuW3xv90eOoJn+KPKLwF+2gnSv91ApeTBM2COmSK8=; b=Q8ssbYllPTtEhnvFN3bUP+011iyvkLPPoIN5fR8Fxr0e4ObpWSLtYDmd ttNlPPX3s4sFJwSXxNt3AuZEsa8L0iFCip3YTGoMFp/8AkX/2jJiAZ9la rJWcXAz0Ts/eLgchvSwHP5onQe8mz9DfMPokxTcb84f8uwI/wU6CJ7Knp 26cBARHy8hQa+4n4tROPSyeij4TleMfRw5Fmf+5Ym9LCYVaSIS35bwTVA LHPswcPoeNRqj0cBjmPDXiZMQek/fuCFiUkyjT5n/j5ZvFu248jXRjsn+ hjxXb930RSoivNr3IJisFbu1mQzvfYAkyPrS3/aCmuYeNN16pogmixc89 Q==; X-CSE-ConnectionGUID: Vp6QI4hwRAqLV7sTsjQapw== X-CSE-MsgGUID: FOiJ/eTQTOGpwaMgiLDxIg== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="41682674" X-IronPort-AV: E=Sophos;i="6.11,199,1725346800"; d="scan'208";a="41682674" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Nov 2024 02:40:29 -0800 X-CSE-ConnectionGUID: 7xQ1lm3HQKWkpE2bHP46NQ== X-CSE-MsgGUID: wQi3sSrJQhOvMWejb3LA7A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,144,1728975600"; d="scan'208";a="117667242" Received: from uaeoff-desk2.amr.corp.intel.com (HELO khuang2-desk.gar.corp.intel.com) ([10.124.223.207]) by orviesa002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Nov 2024 02:40:24 -0800 From: Kai Huang To: dave.hansen@intel.com, kirill.shutemov@linux.intel.com, tglx@linutronix.de, bp@alien8.de, peterz@infradead.org, mingo@redhat.com, hpa@zytor.com, dan.j.williams@intel.com, seanjc@google.com, pbonzini@redhat.com Cc: x86@kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, rick.p.edgecombe@intel.com, isaku.yamahata@intel.com, adrian.hunter@intel.com, nik.borisov@suse.com, kai.huang@intel.com Subject: [PATCH v7 04/10] x86/virt/tdx: Use dedicated struct members for PAMT entry sizes Date: Mon, 11 Nov 2024 23:39:40 +1300 Message-ID: <6ab90fd332bccdec7b64e5909cb4637732d6bb01.1731318868.git.kai.huang@intel.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: References: Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Currently, the 'struct tdmr_sys_info_tdmr' which includes TDMR related fields defines the PAMT entry sizes for TDX supported page sizes (4KB, 2MB and 1GB) as an array: struct tdx_sys_info_tdmr { ... u16 pamt_entry_sizes[TDX_PS_NR]; }; PAMT entry sizes are needed when allocating PAMTs for each TDMR. Using the array to contain PAMT entry sizes reduces the number of arguments that need to be passed when calling tdmr_set_up_pamt(). It also makes the code pattern like below clearer: for (pgsz = TDX_PS_4K; pgsz < TDX_PS_NR; pgsz++) { pamt_size[pgsz] = tdmr_get_pamt_sz(tdmr, pgsz, pamt_entry_size[pgsz]); tdmr_pamt_size += pamt_size[pgsz]; } However, the auto-generated metadata reading code generates a structure member for each field. The 'global_metadata.json' has a dedicated field for each PAMT entry size, and the new 'struct tdx_sys_info_tdmr' looks like: struct tdx_sys_info_tdmr { ... u16 pamt_4k_entry_size; u16 pamt_2m_entry_size; u16 pamt_1g_entry_size; }; To prepare to use the auto-generated code, make the existing 'struct tdx_sys_info_tdmr' look like the generated one. But when passing to tdmrs_set_up_pamt_all(), build a local array of PAMT entry sizes from the structure so the code to allocate PAMTs can stay the same. Signed-off-by: Kai Huang Reviewed-by: Nikolay Borisov Reviewed-by: Dan Williams --- arch/x86/virt/vmx/tdx/tdx.c | 14 +++++++++----- arch/x86/virt/vmx/tdx/tdx.h | 4 +++- 2 files changed, 12 insertions(+), 6 deletions(-) diff --git a/arch/x86/virt/vmx/tdx/tdx.c b/arch/x86/virt/vmx/tdx/tdx.c index 7a2f979092e7..28537a6c47fc 100644 --- a/arch/x86/virt/vmx/tdx/tdx.c +++ b/arch/x86/virt/vmx/tdx/tdx.c @@ -304,9 +304,9 @@ struct field_mapping { static const struct field_mapping fields[] = { TD_SYSINFO_MAP(MAX_TDMRS, max_tdmrs), TD_SYSINFO_MAP(MAX_RESERVED_PER_TDMR, max_reserved_per_tdmr), - TD_SYSINFO_MAP(PAMT_4K_ENTRY_SIZE, pamt_entry_size[TDX_PS_4K]), - TD_SYSINFO_MAP(PAMT_2M_ENTRY_SIZE, pamt_entry_size[TDX_PS_2M]), - TD_SYSINFO_MAP(PAMT_1G_ENTRY_SIZE, pamt_entry_size[TDX_PS_1G]), + TD_SYSINFO_MAP(PAMT_4K_ENTRY_SIZE, pamt_4k_entry_size), + TD_SYSINFO_MAP(PAMT_2M_ENTRY_SIZE, pamt_2m_entry_size), + TD_SYSINFO_MAP(PAMT_1G_ENTRY_SIZE, pamt_1g_entry_size), }; static int get_tdx_sys_info_tdmr(struct tdx_sys_info_tdmr *sysinfo_tdmr) @@ -932,14 +932,18 @@ static int construct_tdmrs(struct list_head *tmb_list, struct tdmr_info_list *tdmr_list, struct tdx_sys_info_tdmr *sysinfo_tdmr) { + u16 pamt_entry_size[TDX_PS_NR] = { + sysinfo_tdmr->pamt_4k_entry_size, + sysinfo_tdmr->pamt_2m_entry_size, + sysinfo_tdmr->pamt_1g_entry_size, + }; int ret; ret = fill_out_tdmrs(tmb_list, tdmr_list); if (ret) return ret; - ret = tdmrs_set_up_pamt_all(tdmr_list, tmb_list, - sysinfo_tdmr->pamt_entry_size); + ret = tdmrs_set_up_pamt_all(tdmr_list, tmb_list, pamt_entry_size); if (ret) return ret; diff --git a/arch/x86/virt/vmx/tdx/tdx.h b/arch/x86/virt/vmx/tdx/tdx.h index 2600ec3752f5..ec879d54eb5c 100644 --- a/arch/x86/virt/vmx/tdx/tdx.h +++ b/arch/x86/virt/vmx/tdx/tdx.h @@ -84,7 +84,9 @@ struct tdmr_info { struct tdx_sys_info_tdmr { u16 max_tdmrs; u16 max_reserved_per_tdmr; - u16 pamt_entry_size[TDX_PS_NR]; + u16 pamt_4k_entry_size; + u16 pamt_2m_entry_size; + u16 pamt_1g_entry_size; }; /* Kernel used global metadata fields */