From: Jisheng Zhang <jszhang3@mail.ustc.edu.cn>
To: "Paul Walmsley" <paul.walmsley@sifive.com>,
"Palmer Dabbelt" <palmer@dabbelt.com>,
"Albert Ou" <aou@eecs.berkeley.edu>,
"Andrey Ryabinin" <ryabinin.a.a@gmail.com>,
"Alexander Potapenko" <glider@google.com>,
"Andrey Konovalov" <andreyknvl@gmail.com>,
"Dmitry Vyukov" <dvyukov@google.com>,
" Björn Töpel" <bjorn@kernel.org>,
"Alexei Starovoitov" <ast@kernel.org>,
"Daniel Borkmann" <daniel@iogearbox.net>,
"Andrii Nakryiko" <andrii@kernel.org>,
"Martin KaFai Lau" <kafai@fb.com>,
"Song Liu" <songliubraving@fb.com>, "Yonghong Song" <yhs@fb.com>,
"John Fastabend" <john.fastabend@gmail.com>,
"KP Singh" <kpsingh@kernel.org>,
"Luke Nelson" <luke.r.nels@gmail.com>,
"Xi Wang" <xi.wang@gmail.com>
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
Date: Tue, 30 Mar 2021 02:23:54 +0800 [thread overview]
Message-ID: <20210330022354.385a9a52@xhacker> (raw)
In-Reply-To: <20210330022144.150edc6e@xhacker>
From: Jisheng Zhang <jszhang@kernel.org>
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 <jszhang@kernel.org>
---
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;
}
--
2.31.0
next prev parent reply other threads:[~2021-03-29 18:29 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-29 18:21 [PATCH 0/9] riscv: improve self-protection Jisheng Zhang
2021-03-29 18:22 ` [PATCH 1/9] riscv: add __init section marker to some functions Jisheng Zhang
2021-03-29 18:22 ` [PATCH 2/9] riscv: Mark some global variables __ro_after_init Jisheng Zhang
2021-03-29 18:23 ` [PATCH 3/9] riscv: Constify sys_call_table Jisheng Zhang
2021-03-29 18:23 ` Jisheng Zhang [this message]
2021-03-29 18:24 ` [PATCH 5/9] riscv: kprobes: Implement alloc_insn_page() Jisheng Zhang
2021-03-29 18:24 ` [PATCH 6/9] riscv: bpf: Move bpf_jit_alloc_exec() and bpf_jit_free_exec() to core Jisheng Zhang
2021-03-29 20:41 ` Luke Nelson
2021-03-29 18:25 ` [PATCH 7/9] riscv: bpf: Avoid breaking W^X Jisheng Zhang
2021-06-11 14:10 ` Andreas Schwab
2021-06-11 16:23 ` Jisheng Zhang
2021-06-11 16:41 ` Andreas Schwab
2021-06-13 17:05 ` Jisheng Zhang
2021-06-13 19:50 ` Andreas Schwab
2021-06-14 16:49 ` [PATCH] riscv: Ensure BPF_JIT_REGION_START aligned with PMD size Jisheng Zhang
2021-06-15 12:29 ` Daniel Borkmann
2021-06-15 18:54 ` Alex Ghiti
2021-06-16 0:03 ` Jisheng Zhang
2021-06-17 7:23 ` Alex Ghiti
2021-06-17 17:17 ` Jisheng Zhang
2021-06-17 7:30 ` Palmer Dabbelt
2021-06-17 8:09 ` Alex Ghiti
2021-06-17 14:18 ` Alex Ghiti
2021-06-17 17:27 ` Jisheng Zhang
2021-06-17 17:46 ` Jisheng Zhang
2021-06-17 18:10 ` Jisheng Zhang
2021-06-17 18:15 ` [PATCH v2] " Jisheng Zhang
2021-06-18 6:48 ` Alex Ghiti
2021-03-29 18:25 ` [PATCH 8/9] riscv: module: Create module allocations without exec permissions Jisheng Zhang
2021-03-29 18:26 ` [PATCH 9/9] riscv: Set ARCH_HAS_STRICT_MODULE_RWX if MMU Jisheng Zhang
2021-04-23 1:48 ` [PATCH 0/9] riscv: improve self-protection Palmer Dabbelt
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