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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: 8bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 92E5A18000D X-Stat-Signature: faocdbgxoynmb48rnhk3tqy7qbhijihq X-HE-Tag: 1681942750-149050 X-HE-Meta: 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 NCCutAam 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 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: 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 += cacheflush.o obj-y += context.o obj-y += pgtable.o obj-y += pmem.o +obj-y += ioremap.o ifeq ($(CONFIG_MMU),y) obj-$(CONFIG_SMP) += 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 = addr & (~PAGE_MASK); + addr -= offset; + size = 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 = addr & (~PAGE_MASK); + addr -= offset; + size = PAGE_ALIGN(size + offset); + + sbi_covg_remove_mmio_region(addr, size); +} -- 2.25.1