From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 6994F6082BFF for ; Wed, 4 Nov 2026 16:48:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=cPmahXQU Received: by kanga.kvack.org (Postfix) id 80B936B05BF; Wed, 4 Nov 2026 11:48:05 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 7B56E6B05C0; Wed, 4 Nov 2026 11:48:05 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 656766B05C1; Wed, 4 Nov 2026 11:48:05 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 421FB6B05BF for ; Wed, 4 Nov 2026 11:48:05 -0500 (EST) Received: from smtpin16.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 37024407CA for ; Wed, 4 Nov 2026 16:48:03 +0000 (UTC) X-FDA: 85398018846.16.0D4121C Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf28.hostedemail.com (Postfix) with ESMTP id 88975C0006 for ; Wed, 4 Nov 2026 16:48:01 +0000 (UTC) Authentication-Results: imf28.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=cPmahXQU; spf=pass (imf28.hostedemail.com: domain of aneesh.kumar@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=aneesh.kumar@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1793810881; 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-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=FUPcWaonNrl3fb8O5Y7CNOmq4dU0FH4gssUQavbBAMM=; b=4AGEHFxI5Nw6Vw7cfv+IEMblVsa3UQIgcPUHeM7vYUtwK7OS8mws2R0+83nz6gO0T9hp7b HFWLQO6padELvdvu3agTiaFDt1ma8oZ2obpgnTSED/PxJR2GOEw6o5eu3MSOIRp9NFre0J ayF5wlknf2wg0zTm1l+wkFiaimf2nIs= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1793810881; b=Sm9ydfugiG8K9Xgja242xkzXvtIMOMQbid05/1iqWr8DxpRjmVUTEzSir8olm2y1wJPKpN 84LTFoFQ9Ox1ai8oYttVMohJmvuKCU/13lXEgCf85FMjO4bvgER7F+7JwBgRIWjZhiEv9h tOPQvC06yh1KxqJK/PGU/zUNj7TsouY= ARC-Authentication-Results: i=1; imf28.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=cPmahXQU; spf=pass (imf28.hostedemail.com: domain of aneesh.kumar@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=aneesh.kumar@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 932AF44506; Wed, 4 Nov 2026 16:48:00 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AFF6D1F000C1; Wed, 4 Nov 2026 16:47:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793810880; bh=FUPcWaonNrl3fb8O5Y7CNOmq4dU0FH4gssUQavbBAMM=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=cPmahXQUm2HT0fyQppUmsSG58zcC3W7kzJwjwC9+vjp2fpNugB1rRsrsK06XtbRE/ OHtCA1YhpJ0We7ep1aIheg+OsugQk9HRuy2duRGha0ESt19yeGKL6CA79Kg3kRrJvc t8ZPmq2S+PPZp7uAqs7vZjixGe9wIJm5NDjusaRJDB0kSeesNhMP+OnYqOR01ZoWGb yK/BlNnWnEK07l7oK5WJvskl6usQW4OOjLt0dFG/X2bUPzf6OJFGp5nsyDsGX+JrAm zbIZqkvz7hZDGsu8vU4VxVw2bS//9x4c3b3oL3FtSiEXt7ew5NL4KnybyjwL17/C9S r0avPyYj6CPmQ== From: "Aneesh Kumar K.V (Arm)" To: linux-coco@lists.linux.dev Cc: "Aneesh Kumar K.V (Arm)" , Andrew Morton , Baoquan He , Mike Rapoport , Pasha Tatashin , Pratyush Yadav , Catalin Marinas , =?UTF-8?q?Christian=20K=C3=B6nig?= , Jason Gunthorpe , Joerg Roedel , Marc Zyngier , Marek Szyprowski , Robin Murphy , Steven Price , Sumit Semwal , Suzuki K Poulose , Thomas Gleixner , Will Deacon , Russell King , Benjamin Gaignard , Brian Starkey , John Stultz , Mark Rutland , Radu Rendec , "T.J. Mercier" , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Ritesh Harjani , Shrikanth Hegde , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Sven Schnelle , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H . Peter Anvin" , Kiryl Shutsemau , Rick Edgecombe , "K . Y . Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Long Li , Paolo Bonzini , Vitaly Kuznetsov , Andy Lutomirski , Peter Zijlstra , dri-devel@lists.freedesktop.org, iommu@lists.linux.dev, linaro-mm-sig@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org, linux-mm@kvack.org, kvmarm@lists.linux.dev, patches@lists.linux.dev Subject: [PATCH v9 04/14] irqchip/gic-v3-its: Allocate shared tables using CoCo shared memory allocator Date: Wed, 4 Nov 2026 22:15:45 +0530 Message-ID: <20261104164555.3555725-5-aneesh.kumar@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261104164555.3555725-1-aneesh.kumar@kernel.org> References: <20261104164555.3555725-1-aneesh.kumar@kernel.org> X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: umdrsh35eghip8wsee6k7sf6hmsoihjo X-Rspamd-Queue-Id: 88975C0006 X-Rspam-User: X-Rspamd-Server: rspam08 X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_PASS, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-HE-Tag: 1793810881-171560 X-HE-Meta: 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 djgDS6Q6 SwFQzKpMk5vZvyv7YM1PGOTpGzTxkjRLENRU0munE+eTjCBlQXps0hCuRQRT4ynnpVLmdlE2x+EY57CZem8HDlkUmRqcJqd6j2WEIj6xFFZs2gJNE+sQJF8qvc2Kwizn/4ViM0YAgBOumyNc0JYsYvbZOrboP84Yiw299hk+B4ecJhFWLOWRRoI/kcNjFeKtMBLBawocxW0Kcq/SrMBrLXOG0qSdUPczwh9dRynkbIKyXRPu6r1patErygHXik1TbOLAxeufgzh7A4NgqWeFWmQqWAQBxOjZ5Ie2TIbkYVVepHDKnaOPRF7kTdhbVRTE+KxDJ7yum64J6+fcDQITQPDnfWHFvRReu7TfLUwul65wH/8zrQcu/aE+S1bdgsW2ahTvQPChGXUTxxlrEA9mb5Hs6af5JQaxhdK6y Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 ITS command queues and tables are shared with the host in a confidential-computing guest. The ITS allocator currently assumes that the guest PAGE_SIZE is sufficient for both allocation alignment and private/shared state changes. Route ITS page allocations through alloc_cc_shared_pages_node(). Keep the tracked table size based on the ITS-requested order. On release, reconstruct the common allocation metadata from the original ITS order and the architecture granule size so the same transitioned range and buddy order are used. Cc: Marc Zyngier Cc: Thomas Gleixner Cc: Radu Rendec Signed-off-by: Aneesh Kumar K.V (Arm) --- drivers/irqchip/irq-gic-v3-its.c | 40 ++++++++++++-------------------- 1 file changed, 15 insertions(+), 25 deletions(-) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index a8860aaadf90..9ad66253ab16 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include #include @@ -19,7 +20,6 @@ #include #include #include -#include #include #include #include @@ -29,7 +29,6 @@ #include #include #include -#include #include #include #include @@ -216,28 +215,16 @@ static gfp_t gfp_flags_quirk; static struct page *its_alloc_pages_node(int node, gfp_t gfp, unsigned int order) { - struct page *page; - int ret = 0; + struct cc_shared_pages mem; if (node == NUMA_NO_NODE) node = numa_mem_id(); - page = alloc_pages_node(node, gfp | gfp_flags_quirk, order); - - if (!page) - return NULL; - - ret = set_memory_decrypted((unsigned long)page_address(page), - 1 << order); - /* - * If set_memory_decrypted() fails then we don't know what state the - * page is in, so we can't free it. Instead we leak it. - * set_memory_decrypted() will already have WARNed. - */ - if (ret) + if (alloc_cc_shared_pages_node(node, gfp | gfp_flags_quirk, + PAGE_SIZE << order, &mem)) return NULL; - return page; + return mem.page; } static struct page *its_alloc_pages(gfp_t gfp, unsigned int order) @@ -247,13 +234,15 @@ static struct page *its_alloc_pages(gfp_t gfp, unsigned int order) static void its_free_pages(void *addr, unsigned int order) { - /* - * If the memory cannot be encrypted again then we must leak the pages. - * set_memory_encrypted() will already have WARNed. - */ - if (set_memory_encrypted((unsigned long)addr, 1 << order)) + struct cc_shared_layout layout; + struct cc_shared_pages mem; + + if (WARN_ON(cc_shared_calc_layout(PAGE_SIZE << order, &layout))) return; - free_pages((unsigned long)addr, order); + + mem.page = virt_to_page(addr); + mem.shared_size = layout.shared_size; + free_cc_shared_pages(&mem); } static struct gen_pool *itt_pool; @@ -278,7 +267,8 @@ static void *itt_alloc_pool(int node, int size) if (!page) break; - gen_pool_add(itt_pool, (unsigned long)page_address(page), PAGE_SIZE, node); + gen_pool_add(itt_pool, (unsigned long)page_address(page), + cc_shared_granule_size(), node); } while (!addr); return (void *)addr; -- 2.43.0