From nobody Thu Dec 18 15:29:05 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E93DFC77B73 for ; Wed, 19 Apr 2023 22:33:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230358AbjDSWd2 (ORCPT ); Wed, 19 Apr 2023 18:33:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32952 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233065AbjDSWdX (ORCPT ); Wed, 19 Apr 2023 18:33:23 -0400 Received: from mail-oa1-x33.google.com (mail-oa1-x33.google.com [IPv6:2001:4860:4864:20::33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AB6FE7D83 for ; Wed, 19 Apr 2023 15:32:50 -0700 (PDT) Received: by mail-oa1-x33.google.com with SMTP id 586e51a60fabf-1881333ac1cso242994fac.1 for ; Wed, 19 Apr 2023 15:32:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20221208.gappssmtp.com; s=20221208; t=1681943475; x=1684535475; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=D8vKC+DATLxW+QWgEBtVVKhLwPezg/zgsscm2TPJ1sU=; b=qxv74nRr8KUP6z4iPKvynxY7tGiNyrmAw+43yq8ueFVRZysx0w8fvqun52lZKTsOtZ WdxJnKUbM0Am7lTPGt5EjMeFHRvzgfOuSSwo8GUzElC4tmDZLzsTwHQgm0ihHWXgztCk lng5MzVZbuMYVL5ZHhx5NvtePWI8Ag2SM+3uCmoDIPNuBEUqAtHqCdVu3pIrWnipIgHa gqZ+l5JbVnFoZtzwHh68/7PRV/cd8GfzLNvz3aERa+K2gF56M6M02NK8/eiE/q0Ldy4L M0nTzOivf10N1zWHb2V5C8qBatDsrmOc/zflUTF1SZ4mckLjdZL8prpgUIq/k3NS+Ad3 Mbww== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1681943475; x=1684535475; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=D8vKC+DATLxW+QWgEBtVVKhLwPezg/zgsscm2TPJ1sU=; b=Ew0Wrr/Yyjy7wpeDoHO/ESGao3NJgD8FQNcMju5lTyFpwvYoATyKlCka3ynwtyrA0O g7Ajthez+BWcW1Pr0GXVcCwPEY562plmJoLHD5b2/wgUForkrZn4YeTDeJGPlhwAUDZu ehk7/4Chw2fpWIJd5naENI5sw2maqTDYtohkePjwwECXBzfWj335gVzP1p/kV3vsmLLH 9zn/eT8bl7N5W9EDb95Oz37f27qZhyqJcz4sUO5I547BL791+GjYGYiwT3O5mFBo7PM9 SKQmSG43fBe6YlLjNt5X1oAtO2+r8gTy6VpORjUsShgbmRu0VyolBz0XpRgsie9SFEeB idjQ== X-Gm-Message-State: AAQBX9fVj5shVKLoGYQEoYnNYvECLucfRVuCZBYkp3RgZFHQBPjW3P8l ubzwRA+euMIgnbHN814Tl6+DQo+9F2PD8460xc0= X-Google-Smtp-Source: AKy350YMt1GXaXJLEtI/tcFCT7P2BRkKgLnzDade8rOaHZzTbglX9T86uEwEdM3HEdy8DD35oL3itg== X-Received: by 2002:a17:903:3013:b0:1a2:8940:6da4 with SMTP id o19-20020a170903301300b001a289406da4mr5416617pla.29.1681942749582; Wed, 19 Apr 2023 15:19:09 -0700 (PDT) Received: from atishp.ba.rivosinc.com ([66.220.2.162]) by smtp.gmail.com with ESMTPSA id jn11-20020a170903050b00b00196807b5189sm11619190plb.292.2023.04.19.15.19.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Apr 2023 15:19:09 -0700 (PDT) From: Atish Patra To: linux-kernel@vger.kernel.org Cc: Rajnesh Kanwal , Atish Patra , Alexandre Ghiti , Andrew Jones , Andrew Morton , Anup Patel , Atish Patra , =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= , Suzuki K Poulose , Will Deacon , Marc Zyngier , Sean Christopherson , linux-coco@lists.linux.dev, Dylan Reid , abrestic@rivosinc.com, Samuel Ortiz , Christoph Hellwig , Conor Dooley , Greg Kroah-Hartman , Guo Ren , Heiko Stuebner , Jiri Slaby , kvm-riscv@lists.infradead.org, kvm@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, Mayuresh Chitale , Palmer Dabbelt , Paolo Bonzini , Paul Walmsley , Uladzislau Rezki Subject: [RFC 45/48] RISC-V: ioremap: Implement for arch specific ioremap hooks Date: Wed, 19 Apr 2023 15:17:13 -0700 Message-Id: <20230419221716.3603068-46-atishp@rivosinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230419221716.3603068-1-atishp@rivosinc.com> References: <20230419221716.3603068-1-atishp@rivosinc.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Rajnesh Kanwal The guests running in CoVE must notify the host about its mmio regions so that host can enable mmio emulation. Signed-off-by: Rajnesh Kanwal Signed-off-by: Atish Patra --- arch/riscv/mm/Makefile | 1 + arch/riscv/mm/ioremap.c | 45 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 46 insertions(+) create mode 100644 arch/riscv/mm/ioremap.c diff --git a/arch/riscv/mm/Makefile b/arch/riscv/mm/Makefile index 1fd9b60..721b557 100644 --- a/arch/riscv/mm/Makefile +++ b/arch/riscv/mm/Makefile @@ -15,6 +15,7 @@ obj-y +=3D cacheflush.o obj-y +=3D context.o obj-y +=3D pgtable.o obj-y +=3D pmem.o +obj-y +=3D ioremap.o =20 ifeq ($(CONFIG_MMU),y) obj-$(CONFIG_SMP) +=3D tlbflush.o diff --git a/arch/riscv/mm/ioremap.c b/arch/riscv/mm/ioremap.c new file mode 100644 index 0000000..0d4e026 --- /dev/null +++ b/arch/riscv/mm/ioremap.c @@ -0,0 +1,45 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2023 Rivos Inc. + * + * Authors: + * Rajnesh Kanwal + */ + +#include +#include +#include +#include +#include +#include +#include + +void ioremap_phys_range_hook(phys_addr_t addr, size_t size, pgprot_t prot) +{ + unsigned long offset; + + if (!is_cove_guest()) + return; + + /* Page-align address and size. */ + offset =3D addr & (~PAGE_MASK); + addr -=3D offset; + size =3D PAGE_ALIGN(size + offset); + + sbi_covg_add_mmio_region(addr, size); +} + +void iounmap_phys_range_hook(phys_addr_t addr, size_t size) +{ + unsigned long offset; + + if (!is_cove_guest()) + return; + + /* Page-align address and size. */ + offset =3D addr & (~PAGE_MASK); + addr -=3D offset; + size =3D PAGE_ALIGN(size + offset); + + sbi_covg_remove_mmio_region(addr, size); +} --=20 2.25.1