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Shutemov" To: Martin Fernandez Cc: linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-mm@kvack.org, kunit-dev@googlegroups.com, linux-kselftest@vger.kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, ardb@kernel.org, dvhart@infradead.org, andy@infradead.org, gregkh@linuxfoundation.org, rafael@kernel.org, rppt@kernel.org, akpm@linux-foundation.org, daniel.gutson@eclypsium.com, hughsient@gmail.com, alex.bazhaniuk@eclypsium.com, alison.schofield@intel.com, keescook@chromium.org Subject: Re: [PATCH v9 2/9] mm/mmzone: Tag pg_data_t with crypto capabilities Message-ID: <20221007155323.ue4cdthkilfy4lbd@box.shutemov.name> References: <20220704135833.1496303-1-martin.fernandez@eclypsium.com> <20220704135833.1496303-3-martin.fernandez@eclypsium.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220704135833.1496303-3-martin.fernandez@eclypsium.com> ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1665158009; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=9tsb9wlbhg2wmiRG5Nzf9i4BhlbHxnw5RiWDYkRyQr4=; b=ppzapymUEi//EfjCauXXqc07zOtg/eBK4lva5RfoDyDa1CECsFe1k2FU080PnjDX0gPfHu A5fsOOQpFFph6MNmlVZmbGzlsGKRm+TJNIlcCn+FGCDwWkUP7jdykeRczJBn2cGxmkam+n ciwDzISImBMCHZ1TNUP9URRM8m1LyeI= ARC-Authentication-Results: i=1; imf11.hostedemail.com; dkim=pass header.d=shutemov.name header.s=fm1 header.b=HOo2Y3LH; dkim=pass header.d=messagingengine.com header.s=fm3 header.b=cXollEPa; dmarc=none; spf=pass (imf11.hostedemail.com: domain of kirill@shutemov.name designates 66.111.4.221 as permitted sender) smtp.mailfrom=kirill@shutemov.name ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1665158009; a=rsa-sha256; cv=none; b=V4kO5G7Unwdkp8GfK0TRo57eye/K9uERww6Eixp4CYTnPp03mAoyu6d+heKgV6OGf2zfLY ChXTv2oQ0QB5/u9BYuskrEETMQsfBuRsA8CDp2AaOv765Tvhw/FVaHQrP4OZQfFglJEY5x qsvqwwaF8oD+aJ49bCIbifR0JkVjvSI= Authentication-Results: imf11.hostedemail.com; dkim=pass header.d=shutemov.name header.s=fm1 header.b=HOo2Y3LH; dkim=pass header.d=messagingengine.com header.s=fm3 header.b=cXollEPa; dmarc=none; spf=pass (imf11.hostedemail.com: domain of kirill@shutemov.name designates 66.111.4.221 as permitted sender) smtp.mailfrom=kirill@shutemov.name X-Stat-Signature: ik76o9cwark7gg8z4x9jyg1icn4x4muu X-Rspamd-Queue-Id: B247F40017 X-Rspam-User: X-Rspamd-Server: rspam06 X-HE-Tag: 1665158009-510355 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, Jul 04, 2022 at 10:58:26AM -0300, Martin Fernandez wrote: > Add a new member in the pg_data_t struct to tell whether the node > corresponding to that pg_data_t is able to do hardware memory > encryption. > > This will be read from sysfs. > > Signed-off-by: Martin Fernandez > --- > include/linux/mmzone.h | 3 +++ > mm/page_alloc.c | 1 + > 2 files changed, 4 insertions(+) > > diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h > index aab70355d64f..6fd4785f1d05 100644 > --- a/include/linux/mmzone.h > +++ b/include/linux/mmzone.h > @@ -883,6 +883,9 @@ typedef struct pglist_data { > struct task_struct *kcompactd; > bool proactive_compact_trigger; > #endif > + > + bool crypto_capable; > + There's already pgdat->flags. Any reason we cannot encode it there? > /* > * This is a per-node reserve of pages that are not available > * to userspace allocations. > diff --git a/mm/page_alloc.c b/mm/page_alloc.c > index e008a3df0485..147437329ac7 100644 > --- a/mm/page_alloc.c > +++ b/mm/page_alloc.c > @@ -7729,6 +7729,7 @@ static void __init free_area_init_node(int nid) > pgdat->node_id = nid; > pgdat->node_start_pfn = start_pfn; > pgdat->per_cpu_nodestats = NULL; > + pgdat->crypto_capable = memblock_node_is_crypto_capable(nid); > > if (start_pfn != end_pfn) { > pr_info("Initmem setup node %d [mem %#018Lx-%#018Lx]\n", nid, > -- > 2.30.2 > -- Kiryl Shutsemau / Kirill A. Shutemov