From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 666EB3A0B32 for ; Mon, 20 Apr 2026 12:29:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776688167; cv=none; b=efdQxhbeqTv76EA8LKdQ1WSlIzrttld/XYLO2HzbO3tOBPM0I6ddVIBpoP2r1T7KpAUykeb5NrleZ8Lrj84HAbjjuyWMp34oYoKhXWaS1qRIMr7CsKO+GBemLzdtS0GM9zgsfrNThqeEgB+QBvtZtqXLHCONCUw3IOaYYtdAl0A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776688167; c=relaxed/simple; bh=TjpqsBK8zzamLpyz9+s5hoi4/jVAJ12AOShG0716e1g=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=UqXomXewyfB5IAJDuNQjTmKGyv4lOJat2cVk39jhUSodzAR8K3KrNxSkqyepRERFCDET4Gy4Tj16pWlBAb4GvwHpi28PARZhSeEFZ6Vm41q67SF+90gcAvBSD+3X0GZXE3HwHB2Ypr8/dIN3oHiw0Qen9OfPneeKD995TrmkmKw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=qlT38oVO; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="qlT38oVO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7BAC3C2BCB6; Mon, 20 Apr 2026 12:29:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776688167; bh=TjpqsBK8zzamLpyz9+s5hoi4/jVAJ12AOShG0716e1g=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=qlT38oVOJS+7xYmfCVi+X6ww7o2PPLQmsfevNenmh75zbkuf5WSWN93F/4scfDyfW As+XSzGGLYNhsjISB1Feqj0/9Rhz40KwIEiMWV3LZGG2BMj7wpMlCmsq9Uc4eSNhyP +UtWK4RvvEB+9DXvhWe3UEEgnaQPCeBoaoutg5CFA85bAVvMqF6kv0Ycp/vZ3f+50Z dYBhdXyMZM/lRlf5zr3EUZwyN13tBaLz1NsEQxCM/cm2x7MzzrCabaF/2K187kAQ3w vhjcznDiAD24LqqDMVVTSd6eiLah1113OS4vwMgtYrnYaMOu11XMDj8T25XHGRLVsE MCC05ubE58zHg== Date: Mon, 20 Apr 2026 17:59:22 +0530 From: Sumit Garg To: Hirokazu Honda Cc: jens.wiklander@linaro.org, op-tee@lists.trustedfirmware.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] tee: optee: Allow MT_NORMAL_TAGGED shared memory Message-ID: References: <20260416221819.3600289-1-hiroh@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260416221819.3600289-1-hiroh@google.com> On Thu, Apr 16, 2026 at 03:18:19PM -0700, Hirokazu Honda wrote: > From: Hirokazu Honda > > On ARM64, shared memory can have MT_NORMAL_TAGGED attribute when using > the Memory Tagging Extension (MTE). The OP-TEE driver needs to > recognize this as normal memory to allow sharing such buffers with the > Secure World. > > Signed-off-by: Hirokazu Honda > --- > drivers/tee/optee/call.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) Reviewed-by: Sumit Garg -Sumit > > diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c > index 9effe88049e9..e046aff61828 100644 > --- a/drivers/tee/optee/call.c > +++ b/drivers/tee/optee/call.c > @@ -602,7 +602,8 @@ static bool is_normal_memory(pgprot_t p) > return (((pgprot_val(p) & L_PTE_MT_MASK) == L_PTE_MT_WRITEALLOC) || > ((pgprot_val(p) & L_PTE_MT_MASK) == L_PTE_MT_WRITEBACK)); > #elif defined(CONFIG_ARM64) > - return (pgprot_val(p) & PTE_ATTRINDX_MASK) == PTE_ATTRINDX(MT_NORMAL); > + return ((pgprot_val(p) & PTE_ATTRINDX_MASK) == PTE_ATTRINDX(MT_NORMAL)) || > + ((pgprot_val(p) & PTE_ATTRINDX_MASK) == PTE_ATTRINDX(MT_NORMAL_TAGGED)); > #else > #error "Unsupported architecture" > #endif > -- > 2.54.0.rc1.513.gad8abe7a5a-goog >