From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.19]) (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 2915C3B7776; Mon, 28 Sep 2026 09:09:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.19 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790586593; cv=none; b=Gq00Q2f5WQn0kXkTkeCSBIhHDePy9/P1+sQ6Ob/tzwCV6rrBlIRPVwErQBRwlG2c7BSc877H2WS0kRmpx/3ncr3ubR4sN2c+qqIDIAbPAo4N3uIlINhjtobGMYPguSUD7rlIQYHiaZ/ofTwR6X4CWg73TiHkgDysOinNYJMlTc8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790586593; c=relaxed/simple; bh=P2sa0Vps4EqQqHHu3WNhLTSJKChchQeJKOg6ephX9QU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=A5pERb5en/5QrTbvqkGMuTBjvI1m8cVrkdy29/hjv4ZuvIx0M5esZoBAlNBGiNFbo6B+UIHsR+g//Ar4NdJKKxbb+8MphkQAP5PDczarIZ1PPTGoPjPLI1DjRBW1GQUhjBZH6vJmuXNhc3eIuBfU+EtLYeGI2Zmzj+9Hd/qyy+Y= 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=i85yfcug; arc=none smtp.client-ip=192.198.163.19 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="i85yfcug" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1790586591; x=1822122591; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=P2sa0Vps4EqQqHHu3WNhLTSJKChchQeJKOg6ephX9QU=; b=i85yfcugybDX7nuxTrnaFj5F4Rj4mtPLgFcCKubyfIw/RiRCgQYRhxtZ /bnw+ZFC0gPH4GWThQQa27w12OsamRd+TzoNJjfsf8lQwdn8NRuz9Jnb4 aA8IpmceQ0rIYkiK4sxfuxB/JyjlyKQgY+vvrCmquLVg2oZN+cMSQ+QUZ n8pzrSWEfRaRwUz9nhRTY18tqGhpyZyqCExxZ0Ak58rxnWIOcTJX/3088 vMEq6Wubw5u0rNVXwwofdS8tVeuA1qRKnqOUeBeQTG+cLvdcP0VfJ8Y9W mo8H7gI/c3Kdcq3OrrmV0uh+pAKEk4iUU+LaHLpNv+Ue9tMlKkpo7wQ+s w==; X-CSE-ConnectionGUID: rxXcSGOkSz+p/EQqyRSfSA== X-CSE-MsgGUID: AcNbM9JXTtytVQIPsg6qoA== X-IronPort-AV: E=McAfee;i="6800,10657,11918"; a="90184581" X-IronPort-AV: E=Sophos;i="6.27,128,1787036400"; d="scan'208";a="90184581" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by fmvoesa113.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Sep 2026 02:09:50 -0700 X-CSE-ConnectionGUID: ThjlGFXYTkyS4Pd3dj0ggQ== X-CSE-MsgGUID: eOuhlCEHTyeXwaKu7o5aRA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,128,1787036400"; d="scan'208";a="301280037" Received: from yzhao56-desk.sh.intel.com ([10.239.47.61]) by fmviesa002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Sep 2026 02:09:44 -0700 From: Yan Zhao To: seanjc@google.com, pbonzini@redhat.com, dave.hansen@intel.com Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, x86@kernel.org, rick.p.edgecombe@intel.com, kas@kernel.org, tabba@google.com, ackerleytng@google.com, michael.roth@amd.com, david@kernel.org, vannapurve@google.com, sagis@google.com, vbabka@suse.cz, thomas.lendacky@amd.com, nik.borisov@suse.com, pgonda@google.com, fan.du@intel.com, jun.miao@intel.com, francescolavra.fl@gmail.com, jgross@suse.com, xiaoyao.li@intel.com, kai.huang@intel.com, binbin.wu@linux.intel.com, chao.p.peng@intel.com, chao.gao@intel.com, farrah.chen@intel.com, yan.y.zhao@intel.com Subject: [PATCH v4 03/17] KVM: TDX: Reset private huge pages after S-EPT page removal Date: Mon, 28 Sep 2026 17:08:45 +0800 Message-ID: <20260928090845.15518-1-yan.y.zhao@intel.com> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20260928090729.15468-1-yan.y.zhao@intel.com> References: <20260928090729.15468-1-yan.y.zhao@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: 8bit "Resetting" TDX pages is a workaround for the TDX_PW_MCE erratum. Once a leaf SPTE can map to a huge page in the S-EPT, the entire huge physical range, rather than just the first 4KB, needs to be reset before the host can reuse it. Signed-off-by: Yan Zhao --- arch/x86/kvm/vmx/tdx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index 410c149bf776..11792a490330 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -1865,7 +1865,7 @@ static int tdx_sept_remove_leaf_spte(struct kvm *kvm, gfn_t gfn, if (TDX_BUG_ON_2(err, TDH_MEM_PAGE_REMOVE, entry, level_state, kvm)) return -EIO; - tdx_quirk_reset_paddr(PFN_PHYS(pfn), PAGE_SIZE); + tdx_quirk_reset_paddr(PFN_PHYS(pfn), KVM_HPAGE_SIZE(level)); tdx_pamt_put(pfn, level); return 0; } -- 2.43.2