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From:   Muhammad Usama Anjum <usama.anjum@collabora.com>
To:     Jonathan Corbet <corbet@lwn.net>,
        Andy Lutomirski <luto@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
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        x86@kernel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)),
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        Andrew Morton <akpm@linux-foundation.org>,
        Peter Zijlstra <peterz@infradead.org>,
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        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
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Cc:     Muhammad Usama Anjum <usama.anjum@collabora.com>,
        kernel@collabora.com
Subject: [PATCH 3/5] mm: wire up process_memwatch syscall for x86
Date:   Tue, 26 Jul 2022 21:18:52 +0500
Message-Id: <20220726161854.276359-4-usama.anjum@collabora.com>
In-Reply-To: <20220726161854.276359-1-usama.anjum@collabora.com>
References: <20220726161854.276359-1-usama.anjum@collabora.com>
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Wire up syscall entry point for both i386 and x86_64 architectures.

Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
---
 arch/x86/entry/syscalls/syscall_32.tbl            | 1 +
 arch/x86/entry/syscalls/syscall_64.tbl            | 1 +
 include/linux/syscalls.h                          | 3 ++-
 include/uapi/asm-generic/unistd.h                 | 5 ++++-
 kernel/sys_ni.c                                   | 1 +
 tools/include/uapi/asm-generic/unistd.h           | 5 ++++-
 tools/perf/arch/x86/entry/syscalls/syscall_64.tbl | 1 +
 7 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl
index 320480a8db4f..601d33909880 100644
--- a/arch/x86/entry/syscalls/syscall_32.tbl
+++ b/arch/x86/entry/syscalls/syscall_32.tbl
@@ -455,3 +455,4 @@
 448	i386	process_mrelease	sys_process_mrelease
 449	i386	futex_waitv		sys_futex_waitv
 450	i386	set_mempolicy_home_node		sys_set_mempolicy_home_node
+451	i386	process_memwatch	sys_process_memwatch
diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl
index c84d12608cd2..3bddea588ce7 100644
--- a/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/arch/x86/entry/syscalls/syscall_64.tbl
@@ -372,6 +372,7 @@
 448	common	process_mrelease	sys_process_mrelease
 449	common	futex_waitv		sys_futex_waitv
 450	common	set_mempolicy_home_node	sys_set_mempolicy_home_node
+451	common	process_memwatch	sys_process_memwatch
 
 #
 # Due to a historical design error, certain syscalls are numbered differently
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index a34b0f9a9972..efa240510e4c 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -939,7 +939,6 @@ asmlinkage long sys_move_pages(pid_t pid, unsigned long nr_pages,
 				const int __user *nodes,
 				int __user *status,
 				int flags);
-
 asmlinkage long sys_rt_tgsigqueueinfo(pid_t tgid, pid_t  pid, int sig,
 		siginfo_t __user *uinfo);
 asmlinkage long sys_perf_event_open(
@@ -1056,6 +1055,8 @@ asmlinkage long sys_memfd_secret(unsigned int flags);
 asmlinkage long sys_set_mempolicy_home_node(unsigned long start, unsigned long len,
 					    unsigned long home_node,
 					    unsigned long flags);
+asmlinkage long sys_process_memwatch(int pidfd, void __user *addr, int len,
+				     unsigned int flags, loff_t __user *vec, int vec_len);
 
 /*
  * Architecture-specific system calls
diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h
index 45fa180cc56a..805a8d5cf0c4 100644
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@ -886,8 +886,11 @@ __SYSCALL(__NR_futex_waitv, sys_futex_waitv)
 #define __NR_set_mempolicy_home_node 450
 __SYSCALL(__NR_set_mempolicy_home_node, sys_set_mempolicy_home_node)
 
+#define __NR_process_memwatch 451
+__SC_COMP(__NR_process_memwatch, sys_process_memwatch, compat_sys_process_memwatch)
+
 #undef __NR_syscalls
-#define __NR_syscalls 451
+#define __NR_syscalls 452
 
 /*
  * 32 bit systems traditionally used different
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index a492f159624f..74f31317481a 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -298,6 +298,7 @@ COND_SYSCALL(set_mempolicy);
 COND_SYSCALL(migrate_pages);
 COND_SYSCALL(move_pages);
 COND_SYSCALL(set_mempolicy_home_node);
+COND_SYSCALL(process_memwatch);
 
 COND_SYSCALL(perf_event_open);
 COND_SYSCALL(accept4);
diff --git a/tools/include/uapi/asm-generic/unistd.h b/tools/include/uapi/asm-generic/unistd.h
index 45fa180cc56a..805a8d5cf0c4 100644
--- a/tools/include/uapi/asm-generic/unistd.h
+++ b/tools/include/uapi/asm-generic/unistd.h
@@ -886,8 +886,11 @@ __SYSCALL(__NR_futex_waitv, sys_futex_waitv)
 #define __NR_set_mempolicy_home_node 450
 __SYSCALL(__NR_set_mempolicy_home_node, sys_set_mempolicy_home_node)
 
+#define __NR_process_memwatch 451
+__SC_COMP(__NR_process_memwatch, sys_process_memwatch, compat_sys_process_memwatch)
+
 #undef __NR_syscalls
-#define __NR_syscalls 451
+#define __NR_syscalls 452
 
 /*
  * 32 bit systems traditionally used different
diff --git a/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl b/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl
index c84d12608cd2..3bddea588ce7 100644
--- a/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl
@@ -372,6 +372,7 @@
 448	common	process_mrelease	sys_process_mrelease
 449	common	futex_waitv		sys_futex_waitv
 450	common	set_mempolicy_home_node	sys_set_mempolicy_home_node
+451	common	process_memwatch	sys_process_memwatch
 
 #
 # Due to a historical design error, certain syscalls are numbered differently
-- 
2.30.2