- 14 5月, 2013 1 次提交
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由 Catalin Marinas 提交于
The of_platform_populate() is currently invoked at device_initcall() level. There are however drivers that use platform_driver_probe() directly and they need the devices to be populated. This patch makes the of_platform_populate() and arch_initcall(). Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com> Reported-by: NBenoit Lecardonnel <Benoit.Lecardonnel@synopsys.com> Tested-by: NBenoit Lecardonnel <Benoit.Lecardonnel@synopsys.com>
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- 13 5月, 2013 2 次提交
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由 Will Deacon 提交于
During boot, we take the debug OS lock before interrupts are enabled. This is required to prevent clearing of PSTATE.D on the interrupt entry path, which could result in spurious debug exceptions before we've got round to resetting things like the hardware breakpoints registers to a sane state. A problem with this approach is that taking the OS lock prevents an external JTAG debugger from debugging the system, which is especially irritating during boot, where JTAG debugging can be most useful. This patch clears mdscr_el1 rather than taking the lock, clearing the MDE and KDE bits and preventing self-hosted hardware debug exceptions from occurring. Tested-by: NMark Rutland <mark.rutland@arm.com> Signed-off-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com> Cc: stable@vger.kernel.org
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由 Chen Gang 提交于
When compiling with allmodconfig. early_console is already defined as an extern global pointer. Need let it point to the object which we intend to (like arm32 done). Signed-off-by: NChen Gang <gang.chen@asianux.com> Acked-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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- 10 5月, 2013 1 次提交
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 08 5月, 2013 1 次提交
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由 Catalin Marinas 提交于
This patch adds the arm_pm_poweroff definition expected by the vexpress-poweroff.c driver and enables the latter for arm64. Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com> Acked-by: NPawel Moll <pawel.moll@arm.com>
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- 01 5月, 2013 2 次提交
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由 Tejun Heo 提交于
show_regs() is inherently arch-dependent but it does make sense to print generic debug information and some archs already do albeit in slightly different forms. This patch introduces a generic function to print debug information from show_regs() so that different archs print out the same information and it's much easier to modify what's printed. show_regs_print_info() prints out the same debug info as dump_stack() does plus task and thread_info pointers. * Archs which didn't print debug info now do. alpha, arc, blackfin, c6x, cris, frv, h8300, hexagon, ia64, m32r, metag, microblaze, mn10300, openrisc, parisc, score, sh64, sparc, um, xtensa * Already prints debug info. Replaced with show_regs_print_info(). The printed information is superset of what used to be there. arm, arm64, avr32, mips, powerpc, sh32, tile, unicore32, x86 * s390 is special in that it used to print arch-specific information along with generic debug info. Heiko and Martin think that the arch-specific extra isn't worth keeping s390 specfic implementation. Converted to use the generic version. Note that now all archs print the debug info before actual register dumps. An example BUG() dump follows. kernel BUG at /work/os/work/kernel/workqueue.c:4841! invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.9.0-rc1-work+ #7 Hardware name: empty empty/S3992, BIOS 080011 10/26/2007 task: ffff88007c85e040 ti: ffff88007c860000 task.ti: ffff88007c860000 RIP: 0010:[<ffffffff8234a07e>] [<ffffffff8234a07e>] init_workqueues+0x4/0x6 RSP: 0000:ffff88007c861ec8 EFLAGS: 00010246 RAX: ffff88007c861fd8 RBX: ffffffff824466a8 RCX: 0000000000000001 RDX: 0000000000000046 RSI: 0000000000000001 RDI: ffffffff8234a07a RBP: ffff88007c861ec8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8234a07a R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88007dc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: ffff88015f7ff000 CR3: 00000000021f1000 CR4: 00000000000007f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Stack: ffff88007c861ef8 ffffffff81000312 ffffffff824466a8 ffff88007c85e650 0000000000000003 0000000000000000 ffff88007c861f38 ffffffff82335e5d ffff88007c862080 ffffffff8223d8c0 ffff88007c862080 ffffffff81c47760 Call Trace: [<ffffffff81000312>] do_one_initcall+0x122/0x170 [<ffffffff82335e5d>] kernel_init_freeable+0x9b/0x1c8 [<ffffffff81c47760>] ? rest_init+0x140/0x140 [<ffffffff81c4776e>] kernel_init+0xe/0xf0 [<ffffffff81c6be9c>] ret_from_fork+0x7c/0xb0 [<ffffffff81c47760>] ? rest_init+0x140/0x140 ... v2: Typo fix in x86-32. v3: CPU number dropped from show_regs_print_info() as dump_stack_print_info() has been updated to print it. s390 specific implementation dropped as requested by s390 maintainers. Signed-off-by: NTejun Heo <tj@kernel.org> Acked-by: NDavid S. Miller <davem@davemloft.net> Acked-by: NJesper Nilsson <jesper.nilsson@axis.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Fengguang Wu <fengguang.wu@intel.com> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Sam Ravnborg <sam@ravnborg.org> Acked-by: Chris Metcalf <cmetcalf@tilera.com> [tile bits] Acked-by: Richard Kuo <rkuo@codeaurora.org> [hexagon bits] Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Tejun Heo 提交于
Both dump_stack() and show_stack() are currently implemented by each architecture. show_stack(NULL, NULL) dumps the backtrace for the current task as does dump_stack(). On some archs, dump_stack() prints extra information - pid, utsname and so on - in addition to the backtrace while the two are identical on other archs. The usages in arch-independent code of the two functions indicate show_stack(NULL, NULL) should print out bare backtrace while dump_stack() is used for debugging purposes when something went wrong, so it does make sense to print additional information on the task which triggered dump_stack(). There's no reason to require archs to implement two separate but mostly identical functions. It leads to unnecessary subtle information. This patch expands the dummy fallback dump_stack() implementation in lib/dump_stack.c such that it prints out debug information (taken from x86) and invokes show_stack(NULL, NULL) and drops arch-specific dump_stack() implementations in all archs except blackfin. Blackfin's dump_stack() does something wonky that I don't understand. Debug information can be printed separately by calling dump_stack_print_info() so that arch-specific dump_stack() implementation can still emit the same debug information. This is used in blackfin. This patch brings the following behavior changes. * On some archs, an extra level in backtrace for show_stack() could be printed. This is because the top frame was determined in dump_stack() on those archs while generic dump_stack() can't do that reliably. It can be compensated by inlining dump_stack() but not sure whether that'd be necessary. * Most archs didn't use to print debug info on dump_stack(). They do now. An example WARN dump follows. WARNING: at kernel/workqueue.c:4841 init_workqueues+0x35/0x505() Hardware name: empty Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.9.0-rc1-work+ #9 0000000000000009 ffff88007c861e08 ffffffff81c614dc ffff88007c861e48 ffffffff8108f50f ffffffff82228240 0000000000000040 ffffffff8234a03c 0000000000000000 0000000000000000 0000000000000000 ffff88007c861e58 Call Trace: [<ffffffff81c614dc>] dump_stack+0x19/0x1b [<ffffffff8108f50f>] warn_slowpath_common+0x7f/0xc0 [<ffffffff8108f56a>] warn_slowpath_null+0x1a/0x20 [<ffffffff8234a071>] init_workqueues+0x35/0x505 ... v2: CPU number added to the generic debug info as requested by s390 folks and dropped the s390 specific dump_stack(). This loses %ksp from the debug message which the maintainers think isn't important enough to keep the s390-specific dump_stack() implementation. dump_stack_print_info() is moved to kernel/printk.c from lib/dump_stack.c. Because linkage is per objecct file, dump_stack_print_info() living in the same lib file as generic dump_stack() means that archs which implement custom dump_stack() - at this point, only blackfin - can't use dump_stack_print_info() as that will bring in the generic version of dump_stack() too. v1 The v1 patch broke build on blackfin due to this issue. The build breakage was reported by Fengguang Wu. Signed-off-by: NTejun Heo <tj@kernel.org> Acked-by: NDavid S. Miller <davem@davemloft.net> Acked-by: NVineet Gupta <vgupta@synopsys.com> Acked-by: NJesper Nilsson <jesper.nilsson@axis.com> Acked-by: NVineet Gupta <vgupta@synopsys.com> Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> [s390 bits] Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Fengguang Wu <fengguang.wu@intel.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Sam Ravnborg <sam@ravnborg.org> Acked-by: Richard Kuo <rkuo@codeaurora.org> [hexagon bits] Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 26 4月, 2013 3 次提交
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由 Mark Rutland 提交于
Currently, if you pass the kernel a dtb where a cpu node has an unsupported enable-method property (e.g. "not-psci"), it'll explode horribly, as it iterates over the enable_ops array incorrectly. It increments the pointer *at* the current element, rather than incrementing the pointer *to* the current element. As the first two elements pointed to structures that were contiguous in memory, this happened to be equivalent. However the third element is NULL, so when the list is exhausted, smp_get_enable_ops generates the wrong pointer, and dereferences an arbitrary portion of memory, which currently happens to contain zero. This patch fixes this by indirecting the pointer one level, so we iterate over the array elements correctly, avoiding the below panic: Signed-off-by: NMark Rutland <mark.rutland@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Catalin Marinas 提交于
The DSB following TLB or cache maintenance ops must be run on the same CPU. With kernel preemption enabled or for user-space cache maintenance this may not be the case. This patch adds an explicit DSB in the __switch_to() function. Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Will Deacon 提交于
For systems where the top 32-bits of the MPIDR are all zero, we should allow the device-tree to specify an #address-size of 0x1 for the CPU reg property and then zero extend the value there. Without this patch, kvmtool breaks with the recent mpidr parsing code introduced in 4c7aa002 ("arm64: kernel: initialise cpu_logical_map from the DT"). Acked-by: NJavi Merino <javi.merino@arm.com> Acked-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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- 17 4月, 2013 2 次提交
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由 Christopher Covington 提交于
For accurate accounting call contextidr_thread_switch before a task is scheduled, rather than after, when the 'next' variable has a different meaning since we switched the stacks. Signed-off-by: NChristopher Covington <cov@codeaurora.org> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Marc Zyngier 提交于
The ESR_EL1 decoding process is a bit cryptic, and KVM has also a need for the same constants. Add a new esr.h file containing the appropriate exception classes constants, and change entry.S to use it. Fix a small bug in the EL1 breakpoint check while we're at it. Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com> Signed-off-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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- 12 4月, 2013 1 次提交
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由 Rob Herring 提交于
This converts arm and arm64 to use CLKSRC_OF DT based initialization for the arch timer. A new function arch_timer_arch_init is added to allow for arch specific setup. This has a side effect of enabling sched_clock on omap5 and exynos5. There should not be any reason not to use the arch timers for sched_clock. Signed-off-by: NRob Herring <rob.herring@calxeda.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Kukjin Kim <kgene.kim@samsung.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Simon Horman <horms@verge.net.au> Cc: Magnus Damm <magnus.damm@gmail.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: John Stultz <john.stultz@linaro.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-samsung-soc@vger.kernel.org Cc: linux-omap@vger.kernel.org Cc: linux-sh@vger.kernel.org Acked-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
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- 08 4月, 2013 1 次提交
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由 Thomas Gleixner 提交于
Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Paul McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Reviewed-by: NCc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Cc: Magnus Damm <magnus.damm@gmail.com> Acked-by: NCatalin Marinas <catalin.marinas@arm.com> Link: http://lkml.kernel.org/r/20130321215233.887563095@linutronix.de
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- 27 3月, 2013 1 次提交
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由 Catalin Marinas 提交于
This patch uses the generic irqchip_init() function for initialising the interrupt controller on arm64. It also adds several definitions required by the ARM GIC irqchip driver but does not enable ARM_GIC yet. Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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- 26 3月, 2013 1 次提交
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由 Liviu Dudau 提交于
With the (re)introduction of cpu_logical_map in arm64 we switch to the use of MPIDR values to identify CPUs. Update the psci code to do that. Signed-off-by: NLiviu Dudau <Liviu.Dudau@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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- 22 3月, 2013 3 次提交
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由 Catalin Marinas 提交于
This patch implements the AArch64-specific atomic bitops functions using exclusive memory accesses to avoid locking. Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Catalin Marinas 提交于
This patch introduces AArch64-specific string functions (strchr, strrchr). Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Catalin Marinas 提交于
This patch introduces AArch64-specific memory functions (memcpy, memmove, memchr, memset). These functions are not optimised for any CPU implementation but can be used as a starting point once hardware is available. Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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- 21 3月, 2013 6 次提交
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由 Javi Merino 提交于
The reg property of the cpu nodes in the DT now contains all the affinity levels in (MPIDR[39:32] and MPIDR[23:0]) and that's what boot_secondary() writes in the pen, so increase the mask in secondary_holding_pen accordingly. Signed-off-by: NJavi Merino <javi.merino@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Javi Merino 提交于
When booting the kernel, the cpu logical id map must be initialised using device tree data passed by FW or through an embedded blob. This patch parses the reg property in device tree "cpu" nodes, retrieves the corresponding CPUs hardware identifiers (MPIDR) and initialises the cpu logical map accordingly. The device tree HW identifiers are considered valid if all CPU nodes contain a "reg" property, there are no duplicate "reg" entries and the DT defines a CPU node whose "reg" property defines affinity levels that matches those of the boot CPU. The primary CPU is assigned cpu logical number 0 to keep the current convention valid. Based on a0ae0240 (ARM: kernel: add device tree init map function). Signed-off-by: NJavi Merino <javi.merino@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Javi Merino 提交于
Change the prototype of write_pen_release() accordingly and clarify that's holding the hardware id of the secondary that's going to boot. This is in preparation of getting HWIDs parsed from the DT. Signed-off-by: NJavi Merino <javi.merino@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Catalin Marinas 提交于
This patch adds an arch_initcall() for the of_clk_init() clock initialisation. Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Anup Patel 提交于
This patch adds support for using earlyprintk with 8250/16550 UART ports. The 8250/16550 UART can either have 8-bit or 32-bit aligned registers which is HW vendor dependent. Kernel args for 8-bit aligned regs: earlyprintk=uart8250-8bit,<phys_address> Kernel args for 32-bit aligned regs: earlyprintk=uart8250-32bit,<phys_address> Signed-off-by: NAnup Patel <anup.patel@linaro.org> Reviewed-by: NMarc Zyngier <marc.zyngier@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Marc Zyngier 提交于
Enable early_printk to use the FastModel semihosting to output the early kernel messages. Works both for host and guest kernels. To use this feature, pass "early_printk=smh" to the kernel. Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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- 18 3月, 2013 2 次提交
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由 Catalin Marinas 提交于
The __atomic_hash is only defined when SMP is enabled but the arm64ksyms.c exports it even for the UP case. Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Catalin Marinas 提交于
Recent clean-up of the compat signal code left an unused 'stack' variable. Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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- 04 3月, 2013 1 次提交
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 24 2月, 2013 1 次提交
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 18 2月, 2013 1 次提交
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由 Len Brown 提交于
pm_idle() on arm64 was a synonym for default_idle(), so remove it and invoke default_idle() directly. Signed-off-by: NLen Brown <len.brown@intel.com> Acked-by: NCatalin Marinas <catalin.marinas@arm.com>
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- 14 2月, 2013 7 次提交
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 12 2月, 2013 1 次提交
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由 Will Deacon 提交于
This patch is a port of 575320d6 ("ARM: 7445/1: mm: update CONTEXTIDR register to contain PID of current process") from ARM that introduces a new Kconfig option which, when enabled, causes the kernel to write the PID of the current task into the CONTEXTIDR register on context switch. This is useful when analysing hardware trace, since writes to this register can be configured to emit an event into the trace stream. Signed-off-by: NWill Deacon <will.deacon@arm.com> [catalin.marinas@arm.com: contextidr_thread_switch() moved to mmu_context.h] Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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- 11 2月, 2013 1 次提交
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由 Will Deacon 提交于
struct compat_ucontext * is a 64-bit pointer, so we need to use a compat_uptr_t instead to avoid declaring a structure incompatible with what AArch32 userspace expects. Cc: <stable@vger.kernel.org> Reported-by: NEdmund Grimley-Evans <Edmund.Grimley-Evans@arm.com> Signed-off-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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- 31 1月, 2013 1 次提交
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由 Mark Rutland 提交于
The arch_timer driver supports a superset of the functionality of the arm_generic driver, and is not tied to a particular arch. This patch moves arm64 to use the arch_timer driver, gaining additional functionality in doing so, and removes the (now unused) arm_generic driver. Timer-related hooks specific to arm64 are moved into arch/arm64/kernel/time.c. Signed-off-by: NMark Rutland <mark.rutland@arm.com> Acked-by: NCatalin Marinas <catalin.marinas@arm.com> Acked-by: NMarc Zyngier <marc.zyngier@arm.com> Acked-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
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