From b6096755f43c443101e6f5d3acc74efa746cb4ec Mon Sep 17 00:00:00 2001 From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Date: Mon, 7 Sep 2015 12:15:51 -0400 Subject: parisc: allocate sys_membarrier system call number Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Tested-by: Helge Deller <deller@gmx.de> CC: Andrew Morton <akpm@linux-foundation.org> CC: linux-api@vger.kernel.org CC: "James E.J. Bottomley" <jejb@parisc-linux.org> CC: linux-parisc@vger.kernel.org Signed-off-by: Helge Deller <deller@gmx.de> --- arch/parisc/include/uapi/asm/unistd.h | 3 ++- arch/parisc/kernel/syscall_table.S | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) (limited to 'arch/parisc') diff --git a/arch/parisc/include/uapi/asm/unistd.h b/arch/parisc/include/uapi/asm/unistd.h index 2e639d7604f6..dadcada6df8b 100644 --- a/arch/parisc/include/uapi/asm/unistd.h +++ b/arch/parisc/include/uapi/asm/unistd.h @@ -358,8 +358,9 @@ #define __NR_memfd_create (__NR_Linux + 340) #define __NR_bpf (__NR_Linux + 341) #define __NR_execveat (__NR_Linux + 342) +#define __NR_membarrier (__NR_Linux + 343) -#define __NR_Linux_syscalls (__NR_execveat + 1) +#define __NR_Linux_syscalls (__NR_membarrier + 1) #define __IGNORE_select /* newselect */ diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S index 8eefb12d1d33..4e779912ec4e 100644 --- a/arch/parisc/kernel/syscall_table.S +++ b/arch/parisc/kernel/syscall_table.S @@ -438,6 +438,7 @@ ENTRY_SAME(memfd_create) /* 340 */ ENTRY_SAME(bpf) ENTRY_COMP(execveat) + ENTRY_SAME(membarrier) .ifne (. - 90b) - (__NR_Linux_syscalls * (91b - 90b)) -- cgit v1.2.3 From 7bc2d40ea690a37eccc2f514c96c56fdcda626b5 Mon Sep 17 00:00:00 2001 From: Helge Deller <deller@gmx.de> Date: Tue, 8 Sep 2015 15:45:32 +0200 Subject: parisc: Wire up userfaultfd syscall Signed-off-by: Helge Deller <deller@gmx.de> --- arch/parisc/include/uapi/asm/unistd.h | 3 ++- arch/parisc/kernel/syscall_table.S | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) (limited to 'arch/parisc') diff --git a/arch/parisc/include/uapi/asm/unistd.h b/arch/parisc/include/uapi/asm/unistd.h index dadcada6df8b..33170384d3ac 100644 --- a/arch/parisc/include/uapi/asm/unistd.h +++ b/arch/parisc/include/uapi/asm/unistd.h @@ -359,8 +359,9 @@ #define __NR_bpf (__NR_Linux + 341) #define __NR_execveat (__NR_Linux + 342) #define __NR_membarrier (__NR_Linux + 343) +#define __NR_userfaultfd (__NR_Linux + 344) -#define __NR_Linux_syscalls (__NR_membarrier + 1) +#define __NR_Linux_syscalls (__NR_userfaultfd + 1) #define __IGNORE_select /* newselect */ diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S index 4e779912ec4e..78c3ef8c348d 100644 --- a/arch/parisc/kernel/syscall_table.S +++ b/arch/parisc/kernel/syscall_table.S @@ -439,6 +439,7 @@ ENTRY_SAME(bpf) ENTRY_COMP(execveat) ENTRY_SAME(membarrier) + ENTRY_SAME(userfaultfd) .ifne (. - 90b) - (__NR_Linux_syscalls * (91b - 90b)) -- cgit v1.2.3 From a01fece2e4185ac173abd16d10304d73d47ebf00 Mon Sep 17 00:00:00 2001 From: John David Anglin <dave.anglin@bell.net> Date: Wed, 14 Oct 2015 20:32:11 -0400 Subject: parisc: Change L1_CACHE_BYTES to 16 Change L1_CACHE_BYTES to 16 bytes. Tested for 16 days on rp3440. Additional remarks from Helge Deller: Saves ~17 kb of kernel code/data and gives a slight performance improvement in various test cases. Signed-off-by: John David Anglin <dave.anglin@bell.net> Signed-off-by: Helge Deller <deller@gmx.de> --- arch/parisc/include/asm/cache.h | 18 +++++------------- 1 file changed, 5 insertions(+), 13 deletions(-) (limited to 'arch/parisc') diff --git a/arch/parisc/include/asm/cache.h b/arch/parisc/include/asm/cache.h index 47f11c707b65..3d0e17bcc8e9 100644 --- a/arch/parisc/include/asm/cache.h +++ b/arch/parisc/include/asm/cache.h @@ -7,20 +7,12 @@ /* - * PA 2.0 processors have 64-byte cachelines; PA 1.1 processors have - * 32-byte cachelines. The default configuration is not for SMP anyway, - * so if you're building for SMP, you should select the appropriate - * processor type. There is a potential livelock danger when running - * a machine with this value set too small, but it's more probable you'll - * just ruin performance. + * PA 2.0 processors have 64 and 128-byte L2 cachelines; PA 1.1 processors + * have 32-byte cachelines. The L1 length appears to be 16 bytes but this + * is not clearly documented. */ -#ifdef CONFIG_PA20 -#define L1_CACHE_BYTES 64 -#define L1_CACHE_SHIFT 6 -#else -#define L1_CACHE_BYTES 32 -#define L1_CACHE_SHIFT 5 -#endif +#define L1_CACHE_BYTES 16 +#define L1_CACHE_SHIFT 4 #ifndef __ASSEMBLY__ -- cgit v1.2.3