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authorLinus Torvalds <torvalds@linux-foundation.org>2016-01-18 23:57:18 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-18 23:57:18 +0300
commitd05d82f7110b08fd36178a641b69a1f206e1142b (patch)
treea274bb136f5ed336fb7a12bb86ea24cc5daffdc9 /arch/tile/include
parentd90f351a9bec6af3e8e7cefbbff94072461c3c9a (diff)
parent00d27c6336b00345724b2510f7c5b8cee3055f02 (diff)
downloadlinux-d05d82f7110b08fd36178a641b69a1f206e1142b.tar.xz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
Pull arch/tile updates from Chris Metcalf: "This is a grab bag of changes that includes some NOHZ and context-tracking related changes, some debugging improvements, JUMP_LABEL support, and some fixes for tilepro allmodconfig support. We also remove the now-unused node_has_online_mem() definitions both for tile's asm/topology.h as well as in linux/topology.h itself" * git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: numa: remove stale node_has_online_mem() define arch/tile: move user_exit() to early kernel entry sequence tile: fix bug in setting PT_FLAGS_DISABLE_IRQ on kernel entry tile: fix tilepro casts for readl, writel, etc tile: fix a -Wframe-larger-than warning tile: include the syscall number in the backtrace MAINTAINERS: add git URL for tile arch/tile: adopt prepare_exit_to_usermode() model from x86 tile/jump_label: add jump label support for TILE-Gx tile: define a macro ktext_writable_addr to get writable kernel text address
Diffstat (limited to 'arch/tile/include')
-rw-r--r--arch/tile/include/asm/insn.h59
-rw-r--r--arch/tile/include/asm/io.h16
-rw-r--r--arch/tile/include/asm/jump_label.h58
-rw-r--r--arch/tile/include/asm/page.h10
-rw-r--r--arch/tile/include/asm/processor.h2
-rw-r--r--arch/tile/include/asm/thread_info.h8
-rw-r--r--arch/tile/include/asm/topology.h3
7 files changed, 142 insertions, 14 deletions
diff --git a/arch/tile/include/asm/insn.h b/arch/tile/include/asm/insn.h
new file mode 100644
index 000000000000..f78ba5c16722
--- /dev/null
+++ b/arch/tile/include/asm/insn.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2015 Tilera Corporation. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for
+ * more details.
+ */
+#ifndef __ASM_TILE_INSN_H
+#define __ASM_TILE_INSN_H
+
+#include <arch/opcode.h>
+
+static inline tilegx_bundle_bits NOP(void)
+{
+ return create_UnaryOpcodeExtension_X0(FNOP_UNARY_OPCODE_X0) |
+ create_RRROpcodeExtension_X0(UNARY_RRR_0_OPCODE_X0) |
+ create_Opcode_X0(RRR_0_OPCODE_X0) |
+ create_UnaryOpcodeExtension_X1(NOP_UNARY_OPCODE_X1) |
+ create_RRROpcodeExtension_X1(UNARY_RRR_0_OPCODE_X1) |
+ create_Opcode_X1(RRR_0_OPCODE_X1);
+}
+
+static inline tilegx_bundle_bits tilegx_gen_branch(unsigned long pc,
+ unsigned long addr,
+ bool link)
+{
+ tilegx_bundle_bits opcode_x0, opcode_x1;
+ long pcrel_by_instr = (addr - pc) >> TILEGX_LOG2_BUNDLE_SIZE_IN_BYTES;
+
+ if (link) {
+ /* opcode: jal addr */
+ opcode_x1 =
+ create_Opcode_X1(JUMP_OPCODE_X1) |
+ create_JumpOpcodeExtension_X1(JAL_JUMP_OPCODE_X1) |
+ create_JumpOff_X1(pcrel_by_instr);
+ } else {
+ /* opcode: j addr */
+ opcode_x1 =
+ create_Opcode_X1(JUMP_OPCODE_X1) |
+ create_JumpOpcodeExtension_X1(J_JUMP_OPCODE_X1) |
+ create_JumpOff_X1(pcrel_by_instr);
+ }
+
+ /* opcode: fnop */
+ opcode_x0 =
+ create_UnaryOpcodeExtension_X0(FNOP_UNARY_OPCODE_X0) |
+ create_RRROpcodeExtension_X0(UNARY_RRR_0_OPCODE_X0) |
+ create_Opcode_X0(RRR_0_OPCODE_X0);
+
+ return opcode_x1 | opcode_x0;
+}
+
+#endif /* __ASM_TILE_INSN_H */
diff --git a/arch/tile/include/asm/io.h b/arch/tile/include/asm/io.h
index 322b5fe94781..30f4a210d148 100644
--- a/arch/tile/include/asm/io.h
+++ b/arch/tile/include/asm/io.h
@@ -161,14 +161,14 @@ extern void _tile_writew(u16 val, unsigned long addr);
extern void _tile_writel(u32 val, unsigned long addr);
extern void _tile_writeq(u64 val, unsigned long addr);
-#define __raw_readb(addr) _tile_readb((unsigned long)addr)
-#define __raw_readw(addr) _tile_readw((unsigned long)addr)
-#define __raw_readl(addr) _tile_readl((unsigned long)addr)
-#define __raw_readq(addr) _tile_readq((unsigned long)addr)
-#define __raw_writeb(val, addr) _tile_writeb(val, (unsigned long)addr)
-#define __raw_writew(val, addr) _tile_writew(val, (unsigned long)addr)
-#define __raw_writel(val, addr) _tile_writel(val, (unsigned long)addr)
-#define __raw_writeq(val, addr) _tile_writeq(val, (unsigned long)addr)
+#define __raw_readb(addr) _tile_readb((unsigned long)(addr))
+#define __raw_readw(addr) _tile_readw((unsigned long)(addr))
+#define __raw_readl(addr) _tile_readl((unsigned long)(addr))
+#define __raw_readq(addr) _tile_readq((unsigned long)(addr))
+#define __raw_writeb(val, addr) _tile_writeb(val, (unsigned long)(addr))
+#define __raw_writew(val, addr) _tile_writew(val, (unsigned long)(addr))
+#define __raw_writel(val, addr) _tile_writel(val, (unsigned long)(addr))
+#define __raw_writeq(val, addr) _tile_writeq(val, (unsigned long)(addr))
#else /* CONFIG_PCI */
diff --git a/arch/tile/include/asm/jump_label.h b/arch/tile/include/asm/jump_label.h
new file mode 100644
index 000000000000..cde7573f397b
--- /dev/null
+++ b/arch/tile/include/asm/jump_label.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2015 Tilera Corporation. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for
+ * more details.
+ */
+
+#ifndef _ASM_TILE_JUMP_LABEL_H
+#define _ASM_TILE_JUMP_LABEL_H
+
+#include <arch/opcode.h>
+
+#define JUMP_LABEL_NOP_SIZE TILE_BUNDLE_SIZE_IN_BYTES
+
+static __always_inline bool arch_static_branch(struct static_key *key,
+ bool branch)
+{
+ asm_volatile_goto("1:\n\t"
+ "nop" "\n\t"
+ ".pushsection __jump_table, \"aw\"\n\t"
+ ".quad 1b, %l[l_yes], %0 + %1 \n\t"
+ ".popsection\n\t"
+ : : "i" (key), "i" (branch) : : l_yes);
+ return false;
+l_yes:
+ return true;
+}
+
+static __always_inline bool arch_static_branch_jump(struct static_key *key,
+ bool branch)
+{
+ asm_volatile_goto("1:\n\t"
+ "j %l[l_yes]" "\n\t"
+ ".pushsection __jump_table, \"aw\"\n\t"
+ ".quad 1b, %l[l_yes], %0 + %1 \n\t"
+ ".popsection\n\t"
+ : : "i" (key), "i" (branch) : : l_yes);
+ return false;
+l_yes:
+ return true;
+}
+
+typedef u64 jump_label_t;
+
+struct jump_entry {
+ jump_label_t code;
+ jump_label_t target;
+ jump_label_t key;
+};
+
+#endif /* _ASM_TILE_JUMP_LABEL_H */
diff --git a/arch/tile/include/asm/page.h b/arch/tile/include/asm/page.h
index 8eca6a0e1762..498a5f71245d 100644
--- a/arch/tile/include/asm/page.h
+++ b/arch/tile/include/asm/page.h
@@ -321,6 +321,16 @@ static inline int pfn_valid(unsigned long pfn)
#define virt_to_page(kaddr) pfn_to_page(kaddr_to_pfn((void *)(kaddr)))
#define page_to_virt(page) pfn_to_kaddr(page_to_pfn(page))
+/*
+ * The kernel text is mapped at MEM_SV_START as read-only. To allow
+ * modifying kernel text, it is also mapped at PAGE_OFFSET as read-write.
+ * This macro converts a kernel address to its writable kernel text mapping,
+ * which is used to modify the text code on a running kernel by kgdb,
+ * ftrace, kprobe, jump label, etc.
+ */
+#define ktext_writable_addr(kaddr) \
+ ((unsigned long)(kaddr) - MEM_SV_START + PAGE_OFFSET)
+
struct mm_struct;
extern pte_t *virt_to_pte(struct mm_struct *mm, unsigned long addr);
extern pte_t *virt_to_kpte(unsigned long kaddr);
diff --git a/arch/tile/include/asm/processor.h b/arch/tile/include/asm/processor.h
index 139dfdee0134..0684e88aacd8 100644
--- a/arch/tile/include/asm/processor.h
+++ b/arch/tile/include/asm/processor.h
@@ -212,7 +212,7 @@ static inline void release_thread(struct task_struct *dead_task)
/* Nothing for now */
}
-extern int do_work_pending(struct pt_regs *regs, u32 flags);
+extern void prepare_exit_to_usermode(struct pt_regs *regs, u32 flags);
/*
diff --git a/arch/tile/include/asm/thread_info.h b/arch/tile/include/asm/thread_info.h
index dc1fb28d9636..4b7cef9e94e0 100644
--- a/arch/tile/include/asm/thread_info.h
+++ b/arch/tile/include/asm/thread_info.h
@@ -140,10 +140,14 @@ extern void _cpu_idle(void);
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_NOHZ (1<<TIF_NOHZ)
+/* Work to do as we loop to exit to user space. */
+#define _TIF_WORK_MASK \
+ (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
+ _TIF_ASYNC_TLB | _TIF_NOTIFY_RESUME)
+
/* Work to do on any return to user space. */
#define _TIF_ALLWORK_MASK \
- (_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_SINGLESTEP | \
- _TIF_ASYNC_TLB | _TIF_NOTIFY_RESUME | _TIF_NOHZ)
+ (_TIF_WORK_MASK | _TIF_SINGLESTEP | _TIF_NOHZ)
/* Work to do at syscall entry. */
#define _TIF_SYSCALL_ENTRY_WORK \
diff --git a/arch/tile/include/asm/topology.h b/arch/tile/include/asm/topology.h
index 76b0d0ebb244..b11d5fcd2c41 100644
--- a/arch/tile/include/asm/topology.h
+++ b/arch/tile/include/asm/topology.h
@@ -44,9 +44,6 @@ static inline const struct cpumask *cpumask_of_node(int node)
/* For now, use numa node -1 for global allocation. */
#define pcibus_to_node(bus) ((void)(bus), -1)
-/* By definition, we create nodes based on online memory. */
-#define node_has_online_mem(nid) 1
-
#endif /* CONFIG_NUMA */
#include <asm-generic/topology.h>