From: guoren@kernel.org
To: guoren@kernel.org, palmer@dabbelt.com, arnd@arndb.de,
anup@brainfault.org, gregkh@linuxfoundation.org,
liush@allwinnertech.com, wefu@redhat.com, drew@beagleboard.org,
wangjunqiang@iscas.ac.cn, hch@lst.de, hch@infradead.org
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-riscv@lists.infradead.org, linux-csky@vger.kernel.org,
linux-s390@vger.kernel.org, sparclinux@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, linux-parisc@vger.kernel.org,
linux-mips@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
x86@kernel.org, Guo Ren <guoren@linux.alibaba.com>
Subject: [PATCH V4 10/17] riscv: compat: process: Add UXL_32 support in start_thread
Date: Sat, 29 Jan 2022 20:17:21 +0800 [thread overview]
Message-ID: <20220129121728.1079364-11-guoren@kernel.org> (raw)
In-Reply-To: <20220129121728.1079364-1-guoren@kernel.org>
From: Guo Ren <guoren@linux.alibaba.com>
If the current task is in COMPAT mode, set SR_UXL_32 in status for
returning userspace. We need CONFIG _COMPAT to prevent compiling
errors with rv32 defconfig.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
---
arch/riscv/kernel/process.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c
index 03ac3aa611f5..1a666ad299b4 100644
--- a/arch/riscv/kernel/process.c
+++ b/arch/riscv/kernel/process.c
@@ -97,6 +97,11 @@ void start_thread(struct pt_regs *regs, unsigned long pc,
}
regs->epc = pc;
regs->sp = sp;
+
+#ifdef CONFIG_COMPAT
+ if (is_compat_task())
+ regs->status |= SR_UXL_32;
+#endif
}
void flush_thread(void)
--
2.25.1
next prev parent reply other threads:[~2022-01-29 12:20 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-29 12:17 [PATCH V4 00/17] riscv: compat: Add COMPAT mode support for rv64 guoren
2022-01-29 12:17 ` [PATCH V4 01/17] kconfig: Add SYSVIPC_COMPAT for all architectures guoren
2022-01-31 12:19 ` Christoph Hellwig
2022-01-29 12:17 ` [PATCH V4 02/17] fs: stat: compat: Add __ARCH_WANT_COMPAT_STAT guoren
2022-01-31 12:19 ` Christoph Hellwig
2022-01-29 12:17 ` [PATCH V4 03/17] asm-generic: compat: Cleanup duplicate definitions guoren
2022-01-29 21:40 ` Arnd Bergmann
2022-01-31 12:21 ` Christoph Hellwig
2022-01-31 13:52 ` Guo Ren
2022-01-29 12:17 ` [PATCH V4 04/17] syscalls: compat: Fix the missing part for __SYSCALL_COMPAT guoren
2022-01-31 12:21 ` Christoph Hellwig
2022-01-29 12:17 ` [PATCH V4 05/17] riscv: Fixup difference with defconfig guoren
2022-01-31 12:23 ` Christoph Hellwig
2022-01-31 12:48 ` Arnd Bergmann
2022-01-31 13:00 ` Christoph Hellwig
2022-01-31 13:19 ` Arnd Bergmann
2022-01-29 12:17 ` [PATCH V4 06/17] riscv: compat: Add basic compat date type implementation guoren
2022-01-29 21:56 ` Arnd Bergmann
2022-01-30 5:47 ` Guo Ren
2022-01-30 11:36 ` Arnd Bergmann
2022-01-29 12:17 ` [PATCH V4 07/17] riscv: compat: Re-implement TASK_SIZE for COMPAT_32BIT guoren
2022-01-29 12:17 ` [PATCH V4 08/17] riscv: compat: syscall: Add compat_sys_call_table implementation guoren
2022-01-29 22:12 ` Arnd Bergmann
2022-01-30 5:54 ` Guo Ren
2022-01-30 11:32 ` Arnd Bergmann
2022-01-30 14:57 ` Guo Ren
2022-01-29 12:17 ` [PATCH V4 09/17] riscv: compat: syscall: Add entry.S implementation guoren
2022-01-29 12:17 ` guoren [this message]
2022-01-29 12:17 ` [PATCH V4 11/17] riscv: compat: Add elf.h implementation guoren
2022-01-29 12:17 ` [PATCH V4 12/17] riscv: compat: vdso: Add rv32 VDSO base code implementation guoren
2022-01-29 12:17 ` [PATCH V4 13/17] riscv: compat: vdso: Add setup additional pages implementation guoren
2022-01-29 12:17 ` [PATCH V4 14/17] riscv: compat: signal: Add rt_frame implementation guoren
2022-01-29 12:17 ` [PATCH V4 15/17] riscv: compat: ptrace: Add compat_arch_ptrace implement guoren
2022-01-29 12:17 ` [PATCH V4 16/17] riscv: compat: Add COMPAT Kbuild skeletal support guoren
2022-01-31 12:26 ` Christoph Hellwig
2022-01-31 13:50 ` Guo Ren
2022-02-01 7:44 ` Christoph Hellwig
2022-02-01 9:13 ` Guo Ren
2022-02-01 9:36 ` Arnd Bergmann
2022-02-01 10:26 ` Guo Ren
2022-02-01 11:48 ` Arnd Bergmann
2022-02-01 13:56 ` Guo Ren
2022-01-29 12:17 ` [PATCH V4 17/17] KVM: compat: riscv: Prevent KVM_COMPAT from being selected guoren
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