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authorLinus Torvalds <torvalds@linux-foundation.org>2016-09-25 13:59:52 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-09-25 13:59:52 -0700
commit831e45d84a971495c882bc186d98bbb825b2ee59 (patch)
tree51d9e306fe09d44e9cd90b976e37bcafdb9a65e0 /arch
parent751b9a5d16cf318d715b0e6c7f3631d8185143ee (diff)
parent116e7111c8e3cc65ceef9664741bd593483e9517 (diff)
downloadlinux-stericsson-831e45d84a971495c882bc186d98bbb825b2ee59.tar.gz
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS fixes from Ralf Baechle: "A round of 4.8 fixes: MIPS generic code: - Add a missing ".set pop" in an early commit - Fix memory regions reaching top of physical - MAAR: Fix address alignment - vDSO: Fix Malta EVA mapping to vDSO page structs - uprobes: fix incorrect uprobe brk handling - uprobes: select HAVE_REGS_AND_STACK_ACCESS_API - Avoid a BUG warning during PR_SET_FP_MODE prctl - SMP: Fix possibility of deadlock when bringing CPUs online - R6: Remove compact branch policy Kconfig entries - Fix size calc when avoiding IPIs for small icache flushes - Fix pre-r6 emulation FPU initialisation - Fix delay slot emulation count in debugfs ATH79: - Fix test for error return of clk_register_fixed_factor. Octeon: - Fix kernel header to work for VDSO build. - Fix initialization of platform device probing. paravirt: - Fix undefined reference to smp_bootstrap" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: MIPS: Fix delay slot emulation count in debugfs MIPS: SMP: Fix possibility of deadlock when bringing CPUs online MIPS: Fix pre-r6 emulation FPU initialisation MIPS: vDSO: Fix Malta EVA mapping to vDSO page structs MIPS: Select HAVE_REGS_AND_STACK_ACCESS_API MIPS: Octeon: Fix platform bus probing MIPS: Octeon: mangle-port: fix build failure with VDSO code MIPS: Avoid a BUG warning during prctl(PR_SET_FP_MODE, ...) MIPS: c-r4k: Fix size calc when avoiding IPIs for small icache flushes MIPS: Add a missing ".set pop" in an early commit MIPS: paravirt: Fix undefined reference to smp_bootstrap MIPS: Remove compact branch policy Kconfig entries MIPS: MAAR: Fix address alignment MIPS: Fix memory regions reaching top of physical MIPS: uprobes: fix incorrect uprobe brk handling MIPS: ath79: Fix test for error return of clk_register_fixed_factor().
Diffstat (limited to 'arch')
-rw-r--r--arch/mips/Kconfig1
-rw-r--r--arch/mips/Kconfig.debug36
-rw-r--r--arch/mips/Makefile4
-rw-r--r--arch/mips/ath79/clock.c2
-rw-r--r--arch/mips/cavium-octeon/octeon-platform.c2
-rw-r--r--arch/mips/include/asm/asmmacro.h1
-rw-r--r--arch/mips/include/asm/mach-cavium-octeon/mangle-port.h4
-rw-r--r--arch/mips/include/asm/mach-paravirt/kernel-entry-init.h2
-rw-r--r--arch/mips/kernel/mips-r2-to-r6-emul.c2
-rw-r--r--arch/mips/kernel/process.c8
-rw-r--r--arch/mips/kernel/setup.c7
-rw-r--r--arch/mips/kernel/smp.c7
-rw-r--r--arch/mips/kernel/uprobes.c2
-rw-r--r--arch/mips/kernel/vdso.c8
-rw-r--r--arch/mips/math-emu/dsemul.c1
-rw-r--r--arch/mips/mm/c-r4k.c2
-rw-r--r--arch/mips/mm/init.c13
17 files changed, 37 insertions, 65 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 26388562e300..212ff92920d2 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -65,6 +65,7 @@ config MIPS
select ARCH_CLOCKSOURCE_DATA
select HANDLE_DOMAIN_IRQ
select HAVE_EXIT_THREAD
+ select HAVE_REGS_AND_STACK_ACCESS_API
menu "Machine selection"
diff --git a/arch/mips/Kconfig.debug b/arch/mips/Kconfig.debug
index f0e314ceb8ba..7f975b20b20c 100644
--- a/arch/mips/Kconfig.debug
+++ b/arch/mips/Kconfig.debug
@@ -113,42 +113,6 @@ config SPINLOCK_TEST
help
Add several files to the debugfs to test spinlock speed.
-if CPU_MIPSR6
-
-choice
- prompt "Compact branch policy"
- default MIPS_COMPACT_BRANCHES_OPTIMAL
-
-config MIPS_COMPACT_BRANCHES_NEVER
- bool "Never (force delay slot branches)"
- help
- Pass the -mcompact-branches=never flag to the compiler in order to
- force it to always emit branches with delay slots, and make no use
- of the compact branch instructions introduced by MIPSr6. This is
- useful if you suspect there may be an issue with compact branches in
- either the compiler or the CPU.
-
-config MIPS_COMPACT_BRANCHES_OPTIMAL
- bool "Optimal (use where beneficial)"
- help
- Pass the -mcompact-branches=optimal flag to the compiler in order for
- it to make use of compact branch instructions where it deems them
- beneficial, and use branches with delay slots elsewhere. This is the
- default compiler behaviour, and should be used unless you have a
- reason to choose otherwise.
-
-config MIPS_COMPACT_BRANCHES_ALWAYS
- bool "Always (force compact branches)"
- help
- Pass the -mcompact-branches=always flag to the compiler in order to
- force it to always emit compact branches, making no use of branch
- instructions with delay slots. This can result in more compact code
- which may be beneficial in some scenarios.
-
-endchoice
-
-endif # CPU_MIPSR6
-
config SCACHE_DEBUGFS
bool "L2 cache debugfs entries"
depends on DEBUG_FS
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index efd7a9dc93c4..598ab2930fce 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -203,10 +203,6 @@ endif
toolchain-virt := $(call cc-option-yn,$(mips-cflags) -mvirt)
cflags-$(toolchain-virt) += -DTOOLCHAIN_SUPPORTS_VIRT
-cflags-$(CONFIG_MIPS_COMPACT_BRANCHES_NEVER) += -mcompact-branches=never
-cflags-$(CONFIG_MIPS_COMPACT_BRANCHES_OPTIMAL) += -mcompact-branches=optimal
-cflags-$(CONFIG_MIPS_COMPACT_BRANCHES_ALWAYS) += -mcompact-branches=always
-
#
# Firmware support
#
diff --git a/arch/mips/ath79/clock.c b/arch/mips/ath79/clock.c
index 2e7378467c5c..cc3a1e33a600 100644
--- a/arch/mips/ath79/clock.c
+++ b/arch/mips/ath79/clock.c
@@ -96,7 +96,7 @@ static struct clk * __init ath79_reg_ffclk(const char *name,
struct clk *clk;
clk = clk_register_fixed_factor(NULL, name, parent_name, 0, mult, div);
- if (!clk)
+ if (IS_ERR(clk))
panic("failed to allocate %s clock structure", name);
return clk;
diff --git a/arch/mips/cavium-octeon/octeon-platform.c b/arch/mips/cavium-octeon/octeon-platform.c
index b31fbc9d6eae..37a932d9148c 100644
--- a/arch/mips/cavium-octeon/octeon-platform.c
+++ b/arch/mips/cavium-octeon/octeon-platform.c
@@ -1059,7 +1059,7 @@ static int __init octeon_publish_devices(void)
{
return of_platform_bus_probe(NULL, octeon_ids, NULL);
}
-device_initcall(octeon_publish_devices);
+arch_initcall(octeon_publish_devices);
MODULE_AUTHOR("David Daney <ddaney@caviumnetworks.com>");
MODULE_LICENSE("GPL");
diff --git a/arch/mips/include/asm/asmmacro.h b/arch/mips/include/asm/asmmacro.h
index 56584a659183..83054f79f72a 100644
--- a/arch/mips/include/asm/asmmacro.h
+++ b/arch/mips/include/asm/asmmacro.h
@@ -157,6 +157,7 @@
ldc1 $f28, THREAD_FPR28(\thread)
ldc1 $f30, THREAD_FPR30(\thread)
ctc1 \tmp, fcr31
+ .set pop
.endm
.macro fpu_restore_16odd thread
diff --git a/arch/mips/include/asm/mach-cavium-octeon/mangle-port.h b/arch/mips/include/asm/mach-cavium-octeon/mangle-port.h
index 0cf5ac1f7245..8ff2cbdf2c3e 100644
--- a/arch/mips/include/asm/mach-cavium-octeon/mangle-port.h
+++ b/arch/mips/include/asm/mach-cavium-octeon/mangle-port.h
@@ -15,8 +15,8 @@
static inline bool __should_swizzle_bits(volatile void *a)
{
extern const bool octeon_should_swizzle_table[];
+ u64 did = ((u64)(uintptr_t)a >> 40) & 0xff;
- unsigned long did = ((unsigned long)a >> 40) & 0xff;
return octeon_should_swizzle_table[did];
}
@@ -29,7 +29,7 @@ static inline bool __should_swizzle_bits(volatile void *a)
#define __should_swizzle_bits(a) false
-static inline bool __should_swizzle_addr(unsigned long p)
+static inline bool __should_swizzle_addr(u64 p)
{
/* boot bus? */
return ((p >> 40) & 0xff) == 0;
diff --git a/arch/mips/include/asm/mach-paravirt/kernel-entry-init.h b/arch/mips/include/asm/mach-paravirt/kernel-entry-init.h
index 2f82bfa3a773..c9f5769dfc8f 100644
--- a/arch/mips/include/asm/mach-paravirt/kernel-entry-init.h
+++ b/arch/mips/include/asm/mach-paravirt/kernel-entry-init.h
@@ -11,11 +11,13 @@
#define CP0_EBASE $15, 1
.macro kernel_entry_setup
+#ifdef CONFIG_SMP
mfc0 t0, CP0_EBASE
andi t0, t0, 0x3ff # CPUNum
beqz t0, 1f
# CPUs other than zero goto smp_bootstrap
j smp_bootstrap
+#endif /* CONFIG_SMP */
1:
.endm
diff --git a/arch/mips/kernel/mips-r2-to-r6-emul.c b/arch/mips/kernel/mips-r2-to-r6-emul.c
index c3372cac6db2..0a7e10b5f9e3 100644
--- a/arch/mips/kernel/mips-r2-to-r6-emul.c
+++ b/arch/mips/kernel/mips-r2-to-r6-emul.c
@@ -1164,7 +1164,9 @@ fpu_emul:
regs->regs[31] = r31;
regs->cp0_epc = epc;
if (!used_math()) { /* First time FPU user. */
+ preempt_disable();
err = init_fpu();
+ preempt_enable();
set_used_math();
}
lose_fpu(1); /* Save FPU state for the emulator. */
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index 7429ad09fbe3..d2d061520a23 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -605,14 +605,14 @@ int mips_set_process_fp_mode(struct task_struct *task, unsigned int value)
return -EOPNOTSUPP;
/* Avoid inadvertently triggering emulation */
- if ((value & PR_FP_MODE_FR) && cpu_has_fpu &&
- !(current_cpu_data.fpu_id & MIPS_FPIR_F64))
+ if ((value & PR_FP_MODE_FR) && raw_cpu_has_fpu &&
+ !(raw_current_cpu_data.fpu_id & MIPS_FPIR_F64))
return -EOPNOTSUPP;
- if ((value & PR_FP_MODE_FRE) && cpu_has_fpu && !cpu_has_fre)
+ if ((value & PR_FP_MODE_FRE) && raw_cpu_has_fpu && !cpu_has_fre)
return -EOPNOTSUPP;
/* FR = 0 not supported in MIPS R6 */
- if (!(value & PR_FP_MODE_FR) && cpu_has_fpu && cpu_has_mips_r6)
+ if (!(value & PR_FP_MODE_FR) && raw_cpu_has_fpu && cpu_has_mips_r6)
return -EOPNOTSUPP;
/* Proceed with the mode switch */
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 36cf8d65c47d..3be0e6ba2797 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -87,6 +87,13 @@ void __init add_memory_region(phys_addr_t start, phys_addr_t size, long type)
int x = boot_mem_map.nr_map;
int i;
+ /*
+ * If the region reaches the top of the physical address space, adjust
+ * the size slightly so that (start + size) doesn't overflow
+ */
+ if (start + size - 1 == (phys_addr_t)ULLONG_MAX)
+ --size;
+
/* Sanity check */
if (start + size < start) {
pr_warn("Trying to add an invalid memory region, skipped\n");
diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index f95f094f36e4..b0baf48951fa 100644
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -322,6 +322,9 @@ asmlinkage void start_secondary(void)
cpumask_set_cpu(cpu, &cpu_coherent_mask);
notify_cpu_starting(cpu);
+ cpumask_set_cpu(cpu, &cpu_callin_map);
+ synchronise_count_slave(cpu);
+
set_cpu_online(cpu, true);
set_cpu_sibling_map(cpu);
@@ -329,10 +332,6 @@ asmlinkage void start_secondary(void)
calculate_cpu_foreign_map();
- cpumask_set_cpu(cpu, &cpu_callin_map);
-
- synchronise_count_slave(cpu);
-
/*
* irq will be enabled in ->smp_finish(), enabling it too early
* is dangerous.
diff --git a/arch/mips/kernel/uprobes.c b/arch/mips/kernel/uprobes.c
index 8452d933a645..1149b30c9aeb 100644
--- a/arch/mips/kernel/uprobes.c
+++ b/arch/mips/kernel/uprobes.c
@@ -222,7 +222,7 @@ int arch_uprobe_exception_notify(struct notifier_block *self,
return NOTIFY_DONE;
switch (val) {
- case DIE_BREAK:
+ case DIE_UPROBE:
if (uprobe_pre_sstep_notifier(regs))
return NOTIFY_STOP;
break;
diff --git a/arch/mips/kernel/vdso.c b/arch/mips/kernel/vdso.c
index 9abe447a4b48..f9dbfb14af33 100644
--- a/arch/mips/kernel/vdso.c
+++ b/arch/mips/kernel/vdso.c
@@ -39,16 +39,16 @@ static struct vm_special_mapping vdso_vvar_mapping = {
static void __init init_vdso_image(struct mips_vdso_image *image)
{
unsigned long num_pages, i;
+ unsigned long data_pfn;
BUG_ON(!PAGE_ALIGNED(image->data));
BUG_ON(!PAGE_ALIGNED(image->size));
num_pages = image->size / PAGE_SIZE;
- for (i = 0; i < num_pages; i++) {
- image->mapping.pages[i] =
- virt_to_page(image->data + (i * PAGE_SIZE));
- }
+ data_pfn = __phys_to_pfn(__pa_symbol(image->data));
+ for (i = 0; i < num_pages; i++)
+ image->mapping.pages[i] = pfn_to_page(data_pfn + i);
}
static int __init init_vdso(void)
diff --git a/arch/mips/math-emu/dsemul.c b/arch/mips/math-emu/dsemul.c
index 72a4642eee2c..4a094f7acb3d 100644
--- a/arch/mips/math-emu/dsemul.c
+++ b/arch/mips/math-emu/dsemul.c
@@ -298,5 +298,6 @@ bool do_dsemulret(struct pt_regs *xcp)
/* Set EPC to return to post-branch instruction */
xcp->cp0_epc = current->thread.bd_emu_cont_pc;
pr_debug("dsemulret to 0x%08lx\n", xcp->cp0_epc);
+ MIPS_FPU_EMU_INC_STATS(ds_emul);
return true;
}
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index cd72805b64a7..fa7d8d3790bf 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -800,7 +800,7 @@ static void r4k_flush_icache_range(unsigned long start, unsigned long end)
* If address-based cache ops don't require an SMP call, then
* use them exclusively for small flushes.
*/
- size = start - end;
+ size = end - start;
cache_size = icache_size;
if (!cpu_has_ic_fills_f_dc) {
size *= 2;
diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index a5509e7dcad2..2c3749d98f04 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -261,7 +261,6 @@ unsigned __weak platform_maar_init(unsigned num_pairs)
{
struct maar_config cfg[BOOT_MEM_MAP_MAX];
unsigned i, num_configured, num_cfg = 0;
- phys_addr_t skip;
for (i = 0; i < boot_mem_map.nr_map; i++) {
switch (boot_mem_map.map[i].type) {
@@ -272,14 +271,14 @@ unsigned __weak platform_maar_init(unsigned num_pairs)
continue;
}
- skip = 0x10000 - (boot_mem_map.map[i].addr & 0xffff);
-
+ /* Round lower up */
cfg[num_cfg].lower = boot_mem_map.map[i].addr;
- cfg[num_cfg].lower += skip;
+ cfg[num_cfg].lower = (cfg[num_cfg].lower + 0xffff) & ~0xffff;
- cfg[num_cfg].upper = cfg[num_cfg].lower;
- cfg[num_cfg].upper += boot_mem_map.map[i].size - 1;
- cfg[num_cfg].upper -= skip;
+ /* Round upper down */
+ cfg[num_cfg].upper = boot_mem_map.map[i].addr +
+ boot_mem_map.map[i].size;
+ cfg[num_cfg].upper = (cfg[num_cfg].upper & ~0xffff) - 1;
cfg[num_cfg].attrs = MIPS_MAAR_S;
num_cfg++;