From nobody Mon Feb 9 01:21:21 2026 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.14]) (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 9416014D299 for ; Mon, 25 Mar 2024 10:46:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.14 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711363586; cv=none; b=hHtlHmzhVkCXdKgoXIrEzSObHLlF+NF5EUM/wyZisZyQ2mF3g2fB8Om+TKft1/WNPmt7mEyVtT3M3Q+s0li+WJxnPZTEChk2PREkuPNT46L/Gl3zZD5KmvUkMQLw+0IvxVQhD176fYO0uwnP776vF22/pIfOejSg0/eWya8zbRE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711363586; c=relaxed/simple; bh=cWV7a/56NGBWfLPCfzjcByxIHOjU8h5IHcNll3QuTV4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=TMRK1HQvAOJk/goDXDcS/xoBcjfcWLvsao8ASmmv9bisIHpluj2B5ugnSMGbId9UGUsBGbd6vQnbN/am5P+fw7WQQ11praT6CZerRA/KyA3uK7VbQ0zoKM2y7Eexj453c7Ywe5aLfQEfjeuUQJ9ymjhTEFqMvQ2z5DH/qyuPc50= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.helo=mgamail.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=JHoWuReV; arc=none smtp.client-ip=192.198.163.14 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.helo=mgamail.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="JHoWuReV" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1711363586; x=1742899586; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=cWV7a/56NGBWfLPCfzjcByxIHOjU8h5IHcNll3QuTV4=; b=JHoWuReVNGXkxWtY2tEwjC+K5C+UAZpiHrPrSxSH1QVx9OiA9cTTE8UQ BLBf15AL8ziuWN7ZUXhchK/pv+WKT2T4q8fx7nK9ERG+ijeWzm1UCfDtK cmfYGsZhvjAER/icSYEX1PcerWONfQJUKXEfXOijNDXi7/PHp7+QyAkXM MLwtiSLydpRIjqL2v0w0MdQ2aVyF7DrRxOf4Xx7eF1jxPU/S3dqMAT3K7 fwSbrb81eqrJwy5qKvzumRTxvvaHWPI//xbdSp5oA0ZzJ4xpG9AtBydIu INT+xxQTBqIiCZBAEyErur+/GGg8uQbF0AwKR98GhLIXQhx1n6dP33gnz g==; X-IronPort-AV: E=McAfee;i="6600,9927,11023"; a="6562000" X-IronPort-AV: E=Sophos;i="6.07,152,1708416000"; d="scan'208";a="6562000" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmvoesa108.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Mar 2024 03:46:15 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,11023"; a="937070189" X-IronPort-AV: E=Sophos;i="6.07,152,1708416000"; d="scan'208";a="937070189" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga001.fm.intel.com with ESMTP; 25 Mar 2024 03:46:11 -0700 Received: by black.fi.intel.com (Postfix, from userid 1000) id D049DE7; Mon, 25 Mar 2024 12:46:10 +0200 (EET) From: "Kirill A. Shutemov" To: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@intel.com Cc: sathyanarayanan.kuppuswamy@linux.intel.com, hpa@zytor.com, seanjc@google.com, elena.reshetova@intel.com, rick.p.edgecombe@intel.com, x86@kernel.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCHv2 1/4] x86/tdx: Introduce tdg_vm_wr() Date: Mon, 25 Mar 2024 12:46:04 +0200 Message-ID: <20240325104607.2653307-2-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240325104607.2653307-1-kirill.shutemov@linux.intel.com> References: <20240325104607.2653307-1-kirill.shutemov@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add a helper function to write to a TD-scope metadata field and use it to set NOTIFY_ENABLES. The helper function will be paired with tdg_vm_rd() and will be used to manipulate other metadata fields, not just NOTIFY_ENABLES. Signed-off-by: Kirill A. Shutemov Reviewed-by: Kai Huang Reviewed-by: Kuppuswamy Sathyanarayanan --- arch/x86/coco/tdx/tdx.c | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-) diff --git a/arch/x86/coco/tdx/tdx.c b/arch/x86/coco/tdx/tdx.c index 59776ce1c1d7..4fb36e5c4e80 100644 --- a/arch/x86/coco/tdx/tdx.c +++ b/arch/x86/coco/tdx/tdx.c @@ -77,6 +77,20 @@ static inline void tdcall(u64 fn, struct tdx_module_args= *args) panic("TDCALL %lld failed (Buggy TDX module!)\n", fn); } =20 +static inline u64 tdg_vm_wr(u64 field, u64 value, u64 mask) +{ + struct tdx_module_args args =3D { + .rdx =3D field, + .r8 =3D value, + .r9 =3D mask, + }; + + tdcall(TDG_VM_WR, &args); + + /* Old value */ + return args.r8; +} + /** * tdx_mcall_get_report0() - Wrapper to get TDREPORT0 (a.k.a. TDREPORT * subtype 0) using TDG.MR.REPORT TDCALL. @@ -902,10 +916,6 @@ static void tdx_kexec_unshare_mem(void) =20 void __init tdx_early_init(void) { - struct tdx_module_args args =3D { - .rdx =3D TDCS_NOTIFY_ENABLES, - .r9 =3D -1ULL, - }; u64 cc_mask; u32 eax, sig[3]; =20 @@ -924,7 +934,7 @@ void __init tdx_early_init(void) cc_set_mask(cc_mask); =20 /* Kernel does not use NOTIFY_ENABLES and does not need random #VEs */ - tdcall(TDG_VM_WR, &args); + tdg_vm_wr(TDCS_NOTIFY_ENABLES, 0, -1ULL); =20 /* * All bits above GPA width are reserved and kernel treats shared bit --=20 2.43.0