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Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lR1ro-0026Or-WF; Tue, 30 Mar 2021 00:04:21 +0000 Received: from email6.ustc.edu.cn ([2001:da8:d800::8] helo=ustc.edu.cn) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lQwdJ-0013SW-OR for linux-riscv@lists.infradead.org; Mon, 29 Mar 2021 18:29:06 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mail.ustc.edu.cn; s=dkim; h=Received:Date:From:To:Cc:Subject: Message-ID:In-Reply-To:References:MIME-Version:Content-Type: Content-Transfer-Encoding; bh=X3JnzAWB/wP2byqIVYcRzkGaaPhYaCeo9n v6lfgBPe0=; b=ciYwCT3No/H9XxjptM0VF/OY2o4gT28I5Kw7VbmnXEjTsDu4mf YsC1hh4Hvuul3+7dfes7tXCpnxr5rNaeT3+rm05riOI1g4KMOnote/sxQ5EcgzWR OEgbeXuq5a1pXFFi581bdlA3cwdSHNOFbsIHEz4ICpx4YZi1p/j/ZTpXU= Received: from xhacker (unknown [101.86.19.180]) by newmailweb.ustc.edu.cn (Coremail) with SMTP id LkAmygCXnkpiHGJg2vRpAA--.2864S2; Tue, 30 Mar 2021 02:28:50 +0800 (CST) Date: Tue, 30 Mar 2021 02:23:54 +0800 From: Jisheng Zhang To: Paul Walmsley , Palmer Dabbelt , Albert Ou , Andrey Ryabinin , Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov , " =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= " , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Luke Nelson , Xi Wang Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, netdev@vger.kernel.org, bpf@vger.kernel.org Subject: [PATCH 4/9] riscv: Constify sbi_ipi_ops Message-ID: <20210330022354.385a9a52@xhacker> In-Reply-To: <20210330022144.150edc6e@xhacker> References: <20210330022144.150edc6e@xhacker> MIME-Version: 1.0 X-CM-TRANSID: LkAmygCXnkpiHGJg2vRpAA--.2864S2 X-Coremail-Antispam: 1UD129KBjvJXoW7KFyxuF4kuF1rWw17ZFyrJFb_yoW8tw1kpw 4UCr45CFWrGFn7Ga43tFWku3y3K3ZrWwnIy34Yka45JFnIqrWUAan0qw12vwn8GFyDuFyS 9r4rCrZ0vF1UAFDanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUkKb7Iv0xC_Zr1lb4IE77IF4wAFF20E14v26ryj6rWUM7CY07I2 0VC2zVCF04k26cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rw A2F7IY1VAKz4vEj48ve4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xII jxv20xvEc7CjxVAFwI0_Gr1j6F4UJwA2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjc xK6I8E87Iv6xkF7I0E14v26F4UJVW0owAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40E FcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2IY67AKxVWUtVWrXwAv7VC2z280aVAFwI0_Gr 0_Cr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcVAKI48JM4IIrI8v6xkF7I0E8cxan2IY 04v7MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI 0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVW8ZVWrXwCIc40Y 0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1I6r4UMIIF0xvE2Ix0cI8IcVCY1x0267AKxV W8Jr0_Cr1UMIIF0xvE42xK8VAvwI8IcIk0rVW8JVW3JwCI42IY6I8E87Iv67AKxVW8JVWx JwCI42IY6I8E87Iv6xkF7I0E14v26r4UJVWxJrUvcSsGvfC2KfnxnUUI43ZEXa7IU8tKsU UUUUU== X-CM-SenderInfo: xmv2xttqjtqzxdloh3xvwfhvlgxou0/ X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210329_192902_779660_1620F28B X-CRM114-Status: GOOD ( 10.75 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: Jisheng Zhang Constify the sbi_ipi_ops so that it will be placed in the .rodata section. This will cause attempts to modify it to fail when strict page permissions are in place. Signed-off-by: Jisheng Zhang --- arch/riscv/include/asm/smp.h | 4 ++-- arch/riscv/kernel/sbi.c | 2 +- arch/riscv/kernel/smp.c | 4 ++-- 3 files changed, 5 insertions(+), 5 deletions(-) diff --git a/arch/riscv/include/asm/smp.h b/arch/riscv/include/asm/smp.h index df1f7c4cd433..a7d2811f3536 100644 --- a/arch/riscv/include/asm/smp.h +++ b/arch/riscv/include/asm/smp.h @@ -46,7 +46,7 @@ int riscv_hartid_to_cpuid(int hartid); void riscv_cpuid_to_hartid_mask(const struct cpumask *in, struct cpumask *out); /* Set custom IPI operations */ -void riscv_set_ipi_ops(struct riscv_ipi_ops *ops); +void riscv_set_ipi_ops(const struct riscv_ipi_ops *ops); /* Clear IPI for current CPU */ void riscv_clear_ipi(void); @@ -92,7 +92,7 @@ static inline void riscv_cpuid_to_hartid_mask(const struct cpumask *in, cpumask_set_cpu(boot_cpu_hartid, out); } -static inline void riscv_set_ipi_ops(struct riscv_ipi_ops *ops) +static inline void riscv_set_ipi_ops(const struct riscv_ipi_ops *ops) { } diff --git a/arch/riscv/kernel/sbi.c b/arch/riscv/kernel/sbi.c index cbd94a72eaa7..cb848e80865e 100644 --- a/arch/riscv/kernel/sbi.c +++ b/arch/riscv/kernel/sbi.c @@ -556,7 +556,7 @@ static void sbi_send_cpumask_ipi(const struct cpumask *target) sbi_send_ipi(cpumask_bits(&hartid_mask)); } -static struct riscv_ipi_ops sbi_ipi_ops = { +static const struct riscv_ipi_ops sbi_ipi_ops = { .ipi_inject = sbi_send_cpumask_ipi }; diff --git a/arch/riscv/kernel/smp.c b/arch/riscv/kernel/smp.c index 504284d49135..e035124f06dc 100644 --- a/arch/riscv/kernel/smp.c +++ b/arch/riscv/kernel/smp.c @@ -85,9 +85,9 @@ static void ipi_stop(void) wait_for_interrupt(); } -static struct riscv_ipi_ops *ipi_ops __ro_after_init; +static const struct riscv_ipi_ops *ipi_ops __ro_after_init; -void riscv_set_ipi_ops(struct riscv_ipi_ops *ops) +void riscv_set_ipi_ops(const struct riscv_ipi_ops *ops) { ipi_ops = ops; }