From: Rongwei Wang <rongwei.wang@linux.alibaba.com>
To: catalin.marinas@arm.com, will@kernel.org,
bjorn.andersson@linaro.org, shawnguo@kernel.org
Cc: gshan@redhat.com, geert+renesas@glider.be, Anson.Huang@nxp.com,
masahiroy@kernel.org, michael@walle.cc, krzk@kernel.org,
linux-kernel@vger.kernel.org, vkoul@kernel.org, olof@lixom.net,
vincenzo.frascino@arm.com, ardb@kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/3] arm64:insn: Export symbols for MSR ARM driver
Date: Tue, 1 Dec 2020 01:48:31 +0800 [thread overview]
Message-ID: <20201130174833.41315-2-rongwei.wang@linux.alibaba.com> (raw)
In-Reply-To: <20201130174833.41315-1-rongwei.wang@linux.alibaba.com>
In order to use the MSR-ARM driver in module and built-in ways, we need export
following symbols.
The MSR-ARM driver depends on function aarch64_insn_patch_text to modify the
text at runtime, and function aarch64_insn_read to read one instruction in the
specified address.
In addition, we need register_undef_hook and unregister_undef_hook to handle
the low probability undefined exception which triggered only by MSR-ARM driver.
Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com>
---
arch/arm64/kernel/insn.c | 2 ++
arch/arm64/kernel/traps.c | 2 ++
2 files changed, 4 insertions(+)
diff --git a/arch/arm64/kernel/insn.c b/arch/arm64/kernel/insn.c
index 6c0de2f..67a1f78 100644
--- a/arch/arm64/kernel/insn.c
+++ b/arch/arm64/kernel/insn.c
@@ -135,6 +135,7 @@ int __kprobes aarch64_insn_read(void *addr, u32 *insnp)
return ret;
}
+EXPORT_SYMBOL(aarch64_insn_read);
static int __kprobes __aarch64_insn_write(void *addr, __le32 insn)
{
@@ -247,6 +248,7 @@ int __kprobes aarch64_insn_patch_text(void *addrs[], u32 insns[], int cnt)
return stop_machine_cpuslocked(aarch64_insn_patch_text_cb, &patch,
cpu_online_mask);
}
+EXPORT_SYMBOL(aarch64_insn_patch_text);
static int __kprobes aarch64_get_imm_shift_mask(enum aarch64_insn_imm_type type,
u32 *maskp, int *shiftp)
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c
index 8af4e0e..c76efa5 100644
--- a/arch/arm64/kernel/traps.c
+++ b/arch/arm64/kernel/traps.c
@@ -292,6 +292,7 @@ void register_undef_hook(struct undef_hook *hook)
list_add(&hook->node, &undef_hook);
raw_spin_unlock_irqrestore(&undef_lock, flags);
}
+EXPORT_SYMBOL(register_undef_hook);
void unregister_undef_hook(struct undef_hook *hook)
{
@@ -301,6 +302,7 @@ void unregister_undef_hook(struct undef_hook *hook)
list_del(&hook->node);
raw_spin_unlock_irqrestore(&undef_lock, flags);
}
+EXPORT_SYMBOL(unregister_undef_hook);
static int call_undef_hook(struct pt_regs *regs)
{
--
1.8.3.1
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next prev parent reply other threads:[~2020-11-30 17:50 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-30 17:48 [PATCH 0/3] arm64:msr: Add MSR driver Rongwei Wang
2020-11-30 17:48 ` Rongwei Wang [this message]
2020-11-30 17:48 ` [PATCH 2/3] arm64:msr: Introduce MSR ARM driver Rongwei Wang
2020-11-30 17:48 ` [PATCH 3/3] arm64:msr: Enable " Rongwei Wang
2020-11-30 17:57 ` [PATCH 0/3] arm64:msr: Add MSR driver Will Deacon
2020-12-01 2:55 ` wangrongwei
2020-12-01 5:44 ` wangrongwei
2020-11-30 18:05 ` Marc Zyngier
2020-11-30 18:20 ` Randy Dunlap
2020-12-01 3:09 ` wangrongwei
2020-12-01 8:12 ` Marc Zyngier
2020-12-01 14:25 ` wangrongwei
2020-12-01 15:37 ` Marc Zyngier
2020-12-03 5:45 ` Rongwei Wang
2020-12-03 8:35 ` Marc Zyngier
2020-12-03 11:25 ` Rongwei Wang
2020-12-03 11:45 ` Marc Zyngier
2020-12-03 12:22 ` Rongwei Wang
2020-12-03 11:50 ` Mark Rutland
2020-11-30 19:03 ` Borislav Petkov
2020-12-01 3:44 ` wangrongwei
2020-12-01 11:26 ` Borislav Petkov
2020-12-01 14:33 ` wangrongwei
2020-12-01 14:54 ` Borislav Petkov
2020-12-01 15:17 ` Rongwei Wang
2020-12-01 15:25 ` Borislav Petkov
2020-12-03 2:09 ` Rongwei Wang
2020-12-01 15:26 ` Ard Biesheuvel
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