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From: guoren@kernel.org
To: guoren@kernel.org, palmer@dabbelt.com, arnd@arndb.de,
	anup@brainfault.org, gregkh@linuxfoundation.org, hch@lst.de
Cc: linux-arch@vger.kernel.org, linux-s390@vger.kernel.org,
	Guo Ren <guoren@linux.alibaba.com>,
	heiko@sntech.de, linux-parisc@vger.kernel.org, x86@kernel.org,
	linux-kernel@vger.kernel.org, linux-csky@vger.kernel.org,
	linux-mips@vger.kernel.org, sparclinux@vger.kernel.org,
	linux-riscv@lists.infradead.org, linuxppc-dev@lists.ozlabs.org,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH V8 09/20] riscv: compat: Add basic compat data type implementation
Date: Wed, 16 Mar 2022 15:03:06 +0800	[thread overview]
Message-ID: <20220316070317.1864279-10-guoren@kernel.org> (raw)
In-Reply-To: <20220316070317.1864279-1-guoren@kernel.org>

From: Guo Ren <guoren@linux.alibaba.com>

Implement riscv asm/compat.h for struct compat_xxx,
is_compat_task, compat_user_regset, regset convert.

The rv64 compat.h has inherited most of the structs
from the generic one.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
---
 arch/riscv/include/asm/compat.h      | 129 +++++++++++++++++++++++++++
 arch/riscv/include/asm/thread_info.h |   1 +
 2 files changed, 130 insertions(+)
 create mode 100644 arch/riscv/include/asm/compat.h

diff --git a/arch/riscv/include/asm/compat.h b/arch/riscv/include/asm/compat.h
new file mode 100644
index 000000000000..2ac955b51148
--- /dev/null
+++ b/arch/riscv/include/asm/compat.h
@@ -0,0 +1,129 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef __ASM_COMPAT_H
+#define __ASM_COMPAT_H
+
+#define COMPAT_UTS_MACHINE	"riscv\0\0"
+
+/*
+ * Architecture specific compatibility types
+ */
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/sched/task_stack.h>
+#include <asm-generic/compat.h>
+
+static inline int is_compat_task(void)
+{
+	return test_thread_flag(TIF_32BIT);
+}
+
+struct compat_user_regs_struct {
+	compat_ulong_t pc;
+	compat_ulong_t ra;
+	compat_ulong_t sp;
+	compat_ulong_t gp;
+	compat_ulong_t tp;
+	compat_ulong_t t0;
+	compat_ulong_t t1;
+	compat_ulong_t t2;
+	compat_ulong_t s0;
+	compat_ulong_t s1;
+	compat_ulong_t a0;
+	compat_ulong_t a1;
+	compat_ulong_t a2;
+	compat_ulong_t a3;
+	compat_ulong_t a4;
+	compat_ulong_t a5;
+	compat_ulong_t a6;
+	compat_ulong_t a7;
+	compat_ulong_t s2;
+	compat_ulong_t s3;
+	compat_ulong_t s4;
+	compat_ulong_t s5;
+	compat_ulong_t s6;
+	compat_ulong_t s7;
+	compat_ulong_t s8;
+	compat_ulong_t s9;
+	compat_ulong_t s10;
+	compat_ulong_t s11;
+	compat_ulong_t t3;
+	compat_ulong_t t4;
+	compat_ulong_t t5;
+	compat_ulong_t t6;
+};
+
+static inline void regs_to_cregs(struct compat_user_regs_struct *cregs,
+				 struct pt_regs *regs)
+{
+	cregs->pc	= (compat_ulong_t) regs->epc;
+	cregs->ra	= (compat_ulong_t) regs->ra;
+	cregs->sp	= (compat_ulong_t) regs->sp;
+	cregs->gp	= (compat_ulong_t) regs->gp;
+	cregs->tp	= (compat_ulong_t) regs->tp;
+	cregs->t0	= (compat_ulong_t) regs->t0;
+	cregs->t1	= (compat_ulong_t) regs->t1;
+	cregs->t2	= (compat_ulong_t) regs->t2;
+	cregs->s0	= (compat_ulong_t) regs->s0;
+	cregs->s1	= (compat_ulong_t) regs->s1;
+	cregs->a0	= (compat_ulong_t) regs->a0;
+	cregs->a1	= (compat_ulong_t) regs->a1;
+	cregs->a2	= (compat_ulong_t) regs->a2;
+	cregs->a3	= (compat_ulong_t) regs->a3;
+	cregs->a4	= (compat_ulong_t) regs->a4;
+	cregs->a5	= (compat_ulong_t) regs->a5;
+	cregs->a6	= (compat_ulong_t) regs->a6;
+	cregs->a7	= (compat_ulong_t) regs->a7;
+	cregs->s2	= (compat_ulong_t) regs->s2;
+	cregs->s3	= (compat_ulong_t) regs->s3;
+	cregs->s4	= (compat_ulong_t) regs->s4;
+	cregs->s5	= (compat_ulong_t) regs->s5;
+	cregs->s6	= (compat_ulong_t) regs->s6;
+	cregs->s7	= (compat_ulong_t) regs->s7;
+	cregs->s8	= (compat_ulong_t) regs->s8;
+	cregs->s9	= (compat_ulong_t) regs->s9;
+	cregs->s10	= (compat_ulong_t) regs->s10;
+	cregs->s11	= (compat_ulong_t) regs->s11;
+	cregs->t3	= (compat_ulong_t) regs->t3;
+	cregs->t4	= (compat_ulong_t) regs->t4;
+	cregs->t5	= (compat_ulong_t) regs->t5;
+	cregs->t6	= (compat_ulong_t) regs->t6;
+};
+
+static inline void cregs_to_regs(struct compat_user_regs_struct *cregs,
+				 struct pt_regs *regs)
+{
+	regs->epc	= (unsigned long) cregs->pc;
+	regs->ra	= (unsigned long) cregs->ra;
+	regs->sp	= (unsigned long) cregs->sp;
+	regs->gp	= (unsigned long) cregs->gp;
+	regs->tp	= (unsigned long) cregs->tp;
+	regs->t0	= (unsigned long) cregs->t0;
+	regs->t1	= (unsigned long) cregs->t1;
+	regs->t2	= (unsigned long) cregs->t2;
+	regs->s0	= (unsigned long) cregs->s0;
+	regs->s1	= (unsigned long) cregs->s1;
+	regs->a0	= (unsigned long) cregs->a0;
+	regs->a1	= (unsigned long) cregs->a1;
+	regs->a2	= (unsigned long) cregs->a2;
+	regs->a3	= (unsigned long) cregs->a3;
+	regs->a4	= (unsigned long) cregs->a4;
+	regs->a5	= (unsigned long) cregs->a5;
+	regs->a6	= (unsigned long) cregs->a6;
+	regs->a7	= (unsigned long) cregs->a7;
+	regs->s2	= (unsigned long) cregs->s2;
+	regs->s3	= (unsigned long) cregs->s3;
+	regs->s4	= (unsigned long) cregs->s4;
+	regs->s5	= (unsigned long) cregs->s5;
+	regs->s6	= (unsigned long) cregs->s6;
+	regs->s7	= (unsigned long) cregs->s7;
+	regs->s8	= (unsigned long) cregs->s8;
+	regs->s9	= (unsigned long) cregs->s9;
+	regs->s10	= (unsigned long) cregs->s10;
+	regs->s11	= (unsigned long) cregs->s11;
+	regs->t3	= (unsigned long) cregs->t3;
+	regs->t4	= (unsigned long) cregs->t4;
+	regs->t5	= (unsigned long) cregs->t5;
+	regs->t6	= (unsigned long) cregs->t6;
+};
+
+#endif /* __ASM_COMPAT_H */
diff --git a/arch/riscv/include/asm/thread_info.h b/arch/riscv/include/asm/thread_info.h
index 60da0dcacf14..e1ad5131944b 100644
--- a/arch/riscv/include/asm/thread_info.h
+++ b/arch/riscv/include/asm/thread_info.h
@@ -91,6 +91,7 @@ struct thread_info {
 #define TIF_SECCOMP		8	/* syscall secure computing */
 #define TIF_NOTIFY_SIGNAL	9	/* signal notifications exist */
 #define TIF_UPROBE		10	/* uprobe breakpoint or singlestep */
+#define TIF_32BIT		11	/* compat-mode 32bit process */
 
 #define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
 #define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
-- 
2.25.1


  parent reply	other threads:[~2022-03-16  7:10 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-16  7:02 [PATCH V8 00/20] riscv: compat: Add COMPAT Kbuild skeletal support guoren
2022-03-16  7:02 ` [PATCH V8 01/20] uapi: simplify __ARCH_FLOCK{,64}_PAD a little guoren
2022-03-16  7:02 ` [PATCH V8 02/20] uapi: always define F_GETLK64/F_SETLK64/F_SETLKW64 in fcntl.h guoren
2022-03-16  7:03 ` [PATCH V8 03/20] compat: consolidate the compat_flock{, 64} definition guoren
2022-03-16  7:03 ` [PATCH V8 04/20] kconfig: Add SYSVIPC_COMPAT for all architectures guoren
2022-03-16  7:03 ` [PATCH V8 05/20] fs: stat: compat: Add __ARCH_WANT_COMPAT_STAT guoren
2022-03-16  7:03 ` [PATCH V8 06/20] asm-generic: compat: Cleanup duplicate definitions guoren
2022-03-16  7:03 ` [PATCH V8 07/20] syscalls: compat: Fix the missing part for __SYSCALL_COMPAT guoren
2022-03-16  7:03 ` [PATCH V8 08/20] riscv: Fixup difference with defconfig guoren
2022-03-16  7:03 ` guoren [this message]
2022-03-16  7:03 ` [PATCH V8 10/20] riscv: compat: Re-implement TASK_SIZE for COMPAT_32BIT guoren
2022-03-21  0:22   ` Guo Ren
2022-03-16  7:03 ` [PATCH V8 11/20] riscv: compat: syscall: Add compat_sys_call_table implementation guoren
2022-03-16  7:03 ` [PATCH V8 12/20] riscv: compat: syscall: Add entry.S implementation guoren
2022-03-16  7:03 ` [PATCH V8 13/20] riscv: compat: process: Add UXL_32 support in start_thread guoren
2022-03-16  7:03 ` [PATCH V8 14/20] riscv: compat: Add elf.h implementation guoren
2022-03-16  7:03 ` [PATCH V8 15/20] riscv: compat: Add hw capability check for elf guoren
2022-03-16  7:03 ` [PATCH V8 16/20] riscv: compat: vdso: Add COMPAT_VDSO base code implementation guoren
2022-03-16  7:03 ` [PATCH V8 17/20] riscv: compat: vdso: Add setup additional pages implementation guoren
2022-03-16  7:03 ` [PATCH V8 18/20] riscv: compat: signal: Add rt_frame implementation guoren
2022-03-16  7:03 ` [PATCH V8 19/20] riscv: compat: ptrace: Add compat_arch_ptrace implement guoren
2022-03-16  7:03 ` [PATCH V8 20/20] riscv: compat: Add COMPAT Kbuild skeletal support guoren

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