From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 622EA3CFF5E for ; Fri, 7 Aug 2026 09:35:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786095304; cv=none; b=K3l8UI4uZvhJtWj2phgKVWBlt8bePrX8Slxde/YGNICqnSoyMQXhfVYH1LP0CS+Hzs/0MBMu5p20xUxTQQSE1vXVm4LZuBHQDgpcGOY/RowSmlC52hhIfMqmmry+3Wl7r937bnpB9xjMSmVkkXf5XKY7o7BeLpvOg5EpkqPsajY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786095304; c=relaxed/simple; bh=MKp03b3qUFXteeKKy4H3/tfANbt5DeMKXkZucjLpj44=; h=From:Subject:To:Cc:In-Reply-To:References:Content-Type:Date: Message-Id; b=tqbOPWlZeVca6rnXo3lYQKLZEJvk67BIL3MQDuloElskDvS9IlgTAPY4IH5R3bshBc8Ds4oYFxkNJK7wFSQsL2Enu97TTMHcDDggJSL3tTlYZOqQShHEI4pK2mmYCDVcnx+hINcVJgJC6abCBMTihr1pTdUPoYqpDJxyYbemiKg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=VapoT6cE; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="VapoT6cE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5479C1F00A3A; Fri, 7 Aug 2026 09:35:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1786095302; bh=MKp03b3qUFXteeKKy4H3/tfANbt5DeMKXkZucjLpj44=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=VapoT6cEIUG8cwACqb/EiFZFjDwx4MI03r7U7dJPyhCevAQR++j2Vz3BLo89LT35w knXMqHyekotBX0BiuR416XxWbytN++Ol0FKWs0wVZZ3gi/Ir6vs6NKRRvEo49BB1bz MXE4SyQgn4xe8Ko6KC5NZQFZ97BNrEsi2Y1VF3uNE9bISIG5+kBCIzeOANDcWTNbt7 5G6vFfwYBCue0RPEA/MjTDi5+dX6awXZ9jY1WNaIkGMNrGR1xa9zkFjk0vQtVVOFJr waHyNB5rYMSE4xKuF2ED/LrfTTRxt3x1s0/yqktUlQd9Cc0lUeYaHzVPKY42PGmEPj op39hlzgw9HPw== From: sashiko-bot@kernel.org Subject: Re: [PATCH] arm64: swiotlb: Keep the default size for protected guests Reply-To: sashiko-reviews@lists.linux.dev To: =?utf-8?b?QW5lZXNoIEt1bWFyIEsuViAoQXJtKQ==?= Cc: linux-s390@vger.kernel.org, "Vasily Gorbik" , "Alexander Gordeev" , "Heiko Carstens" In-Reply-To: <20260807092612.2202005-1-aneesh.kumar@kernel.org> References: <20260717180442.110954-18-aneesh.kumar@kernel.org> <20260807092612.2202005-1-aneesh.kumar@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Fri, 07 Aug 2026 09:35:01 +0000 Message-Id: <20260807093502.5479C1F00A3A@smtp.kernel.org> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: > Realm guests and protected KVM guests may require swiotlb for device DMA > even when all system RAM is addressable by the DMA zones. >=20 > Do not reduce the SWIOTLB buffer to the kmalloc-bouncing size for these > guests, as the reduced number of slots can be exhausted during CCA guest > operation. >=20 > Fixes: 30c5e45ee2c5 ("dma-direct: make dma_direct_map_phys() honor DMA_AT= TR_CC_SHARED") > Signed-off-by: Aneesh Kumar K.V (Arm) Sashiko has reviewed this patch and found no issues. It looks great! --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20260807092612.2202= 005-1-aneesh.kumar@kernel.org?part=3D1