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Mon, 23 Oct 2023 01:29:26 -0700 (PDT) From: Xu Lu To: paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, tglx@linutronix.de, maz@kernel.org, anup@brainfault.org, atishp@atishpatra.org Cc: dengliang.1214@bytedance.com, liyu.yukiteru@bytedance.com, sunjiadong.lff@bytedance.com, xieyongji@bytedance.com, lihangjing@bytedance.com, chaiwen.cc@bytedance.com, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Xu Lu Subject: [RFC 01/12] riscv: Introduce CONFIG_RISCV_PSEUDO_NMI Date: Mon, 23 Oct 2023 16:29:00 +0800 Message-Id: <20231023082911.23242-2-luxu.kernel@bytedance.com> X-Mailer: git-send-email 2.39.3 (Apple Git-145) In-Reply-To: <20231023082911.23242-1-luxu.kernel@bytedance.com> References: <20231023082911.23242-1-luxu.kernel@bytedance.com> MIME-Version: 1.0 X-Spam-Status: No, score=-0.8 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on fry.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (fry.vger.email [0.0.0.0]); Mon, 23 Oct 2023 01:29:41 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1780534250946767557 X-GMAIL-MSGID: 1780534250946767557 This commit introduces a new config RISCV_PSEUDO_NMI to control whether enabling the pseudo NMI feature on RISC-V. Signed-off-by: Xu Lu --- arch/riscv/Kconfig | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index d607ab0f7c6d..487e4293f31e 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -669,6 +669,16 @@ config RISCV_BOOT_SPINWAIT If unsure what to do here, say N. +config RISCV_PSEUDO_NMI + bool "Support for NMI-like interrupts" + depends on !RISCV_M_MODE + default n + help + Adds support for mimicking Non-Maskable Interrupts through the use of + CSR_IE register. + + If unsure, say N. + config ARCH_SUPPORTS_KEXEC def_bool MMU