- 19 6月, 2012 1 次提交
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由 Paul Mackerras 提交于
At the moment we call kvmppc_pin_guest_page() in kvmppc_update_vpa() with two spinlocks held: the vcore lock and the vcpu->vpa_update_lock. This is not good, since kvmppc_pin_guest_page() calls down_read() and get_user_pages_fast(), both of which can sleep. This bug was introduced in 2e25aa5f ("KVM: PPC: Book3S HV: Make virtual processor area registration more robust"). This arranges to drop those spinlocks before calling kvmppc_pin_guest_page() and re-take them afterwards. Dropping the vcore lock in kvmppc_run_core() means we have to set the vcore_state field to VCORE_RUNNING before we drop the lock, so that other vcpus won't try to run this vcore. Signed-off-by: NPaul Mackerras <paulus@samba.org> Acked-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 15 6月, 2012 1 次提交
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由 Paul Mackerras 提交于
At present, hard_irq_disable() does nothing on powerpc because of this code in include/linux/interrupt.h: #ifndef hard_irq_disable #define hard_irq_disable() do { } while(0) #endif So we need to make our hard_irq_disable be a macro. It was previously a macro until commit 7230c564 ("powerpc: Rework lazy-interrupt handling") changed it to a static inline function. Cc: stable@vger.kernel.org Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org> -- arch/powerpc/include/asm/hw_irq.h | 3 +++ 1 file changed, 3 insertions(+)
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- 08 6月, 2012 2 次提交
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由 Steffen Rumler 提交于
This fixes a problem which can causes kernel oopses while loading a kernel module. According to the PowerPC EABI specification, GPR r11 is assigned the dedicated function to point to the previous stack frame. In the powerpc-specific kernel module loader, do_plt_call() (in arch/powerpc/kernel/module_32.c), GPR r11 is also used to generate trampoline code. This combination crashes the kernel, in the case where the compiler chooses to use a helper function for saving GPRs on entry, and the module loader has placed the .init.text section far away from the .text section, meaning that it has to generate a trampoline for functions in the .init.text section to call the GPR save helper. Because the trampoline trashes r11, references to the stack frame using r11 can cause an oops. The fix just uses GPR r12 instead of GPR r11 for generating the trampoline code. According to the statements from Freescale, this is safe from an EABI perspective. I've tested the fix for kernel 2.6.33 on MPC8541. Cc: stable@vger.kernel.org Signed-off-by: NSteffen Rumler <steffen.rumler.ext@nsn.com> [paulus@samba.org: reworded the description] Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Paul Mackerras 提交于
This reverts 68568add ("powerpc/time: Remove unnecessary sanity check of decrementer expiration"). We do need to check whether we have reached the expiration time of the next event, because we sometimes get an early decrementer interrupt, most notably when we set the decrementer to 1 in arch_irq_work_raise(). The effect of not having the sanity check is that if timer_interrupt() gets called early, we leave the decrementer set to its maximum value, which means we then don't get any more decrementer interrupts for about 4 seconds (or longer, depending on timebase frequency). I saw these pauses as a consequence of getting a stray hypervisor decrementer interrupt left over from exiting a KVM guest. This isn't quite a straight revert because of changes to the surrounding code, but it restores the same algorithm as was previously used. Cc: stable@vger.kernel.org Acked-by: NAnton Blanchard <anton@samba.org> Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 02 6月, 2012 9 次提交
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由 Anton Blanchard 提交于
commit e57f93cc (powerpc: get rid of nlink_t uses, switch to explicitly-sized type) changed the size of st_nlink on ppc64 from a long to a short, resulting in boot failures. Signed-off-by: NAnton Blanchard <anton@samba.org> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
Does block_sigmask() + tracehook_signal_handler(); called when sigframe has been successfully built. All architectures converted to it; block_sigmask() itself is gone now (merged into this one). I'm still not too happy with the signature, but that's a separate story (IMO we need a structure that would contain signal number + siginfo + k_sigaction, so that get_signal_to_deliver() would fill one, signal_delivered(), handle_signal() and probably setup...frame() - take one). Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
... it's just a call of set_current_blocked() now Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
Only 3 out of 63 do not. Renamed the current variant to __set_current_blocked(), added set_current_blocked() that will exclude unblockable signals, switched open-coded instances to it. 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
replace boilerplate "should we use ->saved_sigmask or ->blocked?" with calls of obvious inlined helper... Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
first fruits of ..._restore_sigmask() helpers: now we can take boilerplate "signal didn't have a handler, clear RESTORE_SIGMASK and restore the blocked mask from ->saved_mask" into a common helper. Open-coded instances switched... Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Al Viro 提交于
helpers parallel to set_restore_sigmask(), used in the next commits Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 01 6月, 2012 1 次提交
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由 Anton Vorontsov 提交于
Current CPU hotplug code has some task->mm handling issues: 1. Working with task->mm w/o getting mm or grabing the task lock is dangerous as ->mm might disappear (exit_mm() assigns NULL under task_lock(), so tasklist lock is not enough). We can't use get_task_mm()/mmput() pair as mmput() might sleep, so we must take the task lock while handle its mm. 2. Checking for process->mm is not enough because process' main thread may exit or detach its mm via use_mm(), but other threads may still have a valid mm. To fix this we would need to use find_lock_task_mm(), which would walk up all threads and returns an appropriate task (with task lock held). clear_tasks_mm_cpumask() has all the issues fixed, so let's use it. Suggested-by: NOleg Nesterov <oleg@redhat.com> Signed-off-by: NAnton Vorontsov <anton.vorontsov@linaro.org> Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 31 5月, 2012 2 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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- 28 5月, 2012 1 次提交
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由 Paul Mackerras 提交于
This is much the same as for SPARC except that we can do the find_zero() function more efficiently using the count-leading-zeroes instructions. Tested on 32-bit and 64-bit PowerPC. Signed-off-by: NPaul Mackerras <paulus@samba.org> Acked-by: NDavid S. Miller <davem@davemloft.net> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 24 5月, 2012 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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- 22 5月, 2012 7 次提交
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由 Kim Phillips 提交于
setting CONFIG_IRQ_ALL_CPUS distributes IRQs to CPUs only when the number of online CPUs equals NR_CPUS. See commit 280ff974 "sparc64: fix and optimize irq distribution" for more details. Using the online mask fixes IRQ-to-CPU distribution on systems that boot with less than NR_CPUS. Signed-off-by: NKim Phillips <kim.phillips@freescale.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Benjamin Herrenschmidt 提交于
This reverts commit 1b788400. It causes oopses when passed incorrect arguments and has a design fault using IPIs with interrupts disabled. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> ---
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由 Anshuman Khandual 提交于
-- Signed-off-by: NAnshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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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
guts of saved_sigmask-based sigsuspend/rt_sigsuspend. Takes kernel sigset_t *. Open-coded instances replaced with calling it. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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由 Thomas Gleixner 提交于
Sigh, I missed to check which architecture Kconfig files actually include the core Kconfig file. There are a few which did not. So we broke them. Instead of adding the includes to those, we are better off to move the include to init/Kconfig like we did already with irqs and others. This does not change anything for the architectures using the old style periodic timer mode. It just solves the build wreckage there. For those architectures which use the clock events infrastructure it moves the include of the core Kconfig file to "General setup" which is a way more logical place than having it at random locations specified by the architecture specific Kconfigs. Reported-by: NIngo Molnar <mingo@kernel.org> Cc: Anna-Maria Gleixner <anna-maria@glx-um.de> Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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由 Sam Ravnborg 提交于
There is no point having the NET dependency on the select target, as it forces all users to depend on NET to tell they support BPF_JIT. Move the config option to the bottom of the file - this could be a nice place also for future "selectable" config symbols. Fix up all users to drop the dependency on NET now that it is not required to supress warnings for non-NET builds. Reported-by: NLinus Torvalds <torvalds@linux-foundation.org> Signed-off-by: NSam Ravnborg <sam@ravnborg.org> Acked-by: NDavid Miller <davem@davemloft.net> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 21 5月, 2012 1 次提交
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由 Anna-Maria Gleixner 提交于
Signed-off-by: NAnna-Maria Gleixner <anna-maria@glx-um.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Link: http://lkml.kernel.org/r/20120518163106.464567389@glx-um.deSigned-off-by: NThomas Gleixner <tglx@linutronix.de>
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- 17 5月, 2012 1 次提交
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由 Suresh Siddha 提交于
Historical prepare_to_copy() is mostly a no-op, duplicated for majority of the architectures and the rest following the x86 model of flushing the extended register state like fpu there. Remove it and use the arch_dup_task_struct() instead. Suggested-by: NOleg Nesterov <oleg@redhat.com> Suggested-by: NLinus Torvalds <torvalds@linux-foundation.org> Signed-off-by: NSuresh Siddha <suresh.b.siddha@intel.com> Link: http://lkml.kernel.org/r/1336692811-30576-1-git-send-email-suresh.b.siddha@intel.comAcked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Howells <dhowells@redhat.com> Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Chris Zankel <chris@zankel.net> Cc: Richard Henderson <rth@twiddle.net> Cc: Russell King <linux@arm.linux.org.uk> Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Mark Salter <msalter@redhat.com> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Tony Luck <tony.luck@intel.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Jonas Bonn <jonas@southpole.se> Cc: James E.J. Bottomley <jejb@parisc-linux.org> Cc: Helge Deller <deller@gmx.de> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Chen Liqin <liqin.chen@sunplusct.com> Cc: Lennox Wu <lennox.wu@gmail.com> Cc: David S. Miller <davem@davemloft.net> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Jeff Dike <jdike@addtoit.com> Cc: Richard Weinberger <richard@nod.at> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com>
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- 16 5月, 2012 7 次提交
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由 Paul Mackerras 提交于
When handling the H_BULK_REMOVE hypercall, we were forgetting to invalidate and unlock the hashed page table entry (HPTE) in the case where the page had been paged out. This fixes it by clearing the first doubleword of the HPTE in that case. This fixes a regression introduced in commit a92bce95 ("KVM: PPC: Book3S HV: Keep HPTE locked when invalidating"). The effect of the regression is that the host kernel will sometimes hang when under memory pressure. Signed-off-by: NPaul Mackerras <paulus@samba.org> Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Benjamin Herrenschmidt 提交于
The code forgot to scramble the VSIDs the way we normally do and was basically using the "proto VSID" directly with the MMU. This means that in practice, KVM used random VSIDs that could collide with segments used by other user space programs. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> [agraf: simplify ppc32 case] Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Alexander Graf 提交于
When jumping back into the kernel to code that knows that it would be using HSRR registers instead of SRR registers, we need to make sure we pass it all information on where to jump to in HSRR registers. Unfortunately, we used r10 to store the information to distinguish between the HSRR and SRR case. That register got clobbered in between though, rendering the later comparison invalid. Instead, let's use cr1 to store this information. That way we don't need yet another register and everyone's happy. This fixes PR KVM on POWER7 bare metal for me. Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Alexander Graf 提交于
When running on a system that is HV capable, some interrupts use HSRR SPRs instead of the normal SRR SPRs. These are also used in the Linux handlers to jump back to code after an interrupt got processed. Unfortunately, in our "jump back to the real host handler after we've done the context switch" code, we were only setting the SRR SPRs, rendering Linux to jump back to some invalid IP after it's processed the interrupt. This fixes random crashes on p7 opal mode with PR KVM for me. Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Alexander Graf 提交于
In addition to normal "priviledged instruction" traps, we can also receive "emulation assist" traps on newer hardware that has the HV bit set. Handle that one the same way as a privileged instruction, including the instruction fetching. That way we don't execute old instructions that we happen to still leave in that field when an emul assist trap comes. This fixes -M mac99 / -M g3beige on p7 bare metal for me. Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Kent Yoder 提交于
This patch adds the cas bits to advertise support for the Platform Facilities Option (PFO) based encryption accelerator device. The nx device driver provides support for this hardware feature. Signed-off-by: NKent Yoder <key@linux.vnet.ibm.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Kent Yoder 提交于
These files support configuring and building the nx device driver. Signed-off-by: NKent Yoder <key@linux.vnet.ibm.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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- 15 5月, 2012 1 次提交
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由 Arnd Bergmann 提交于
This patch unifies the current DT MMC bindings documentation and code, adds generic MMC DT bindings documentation, and updates .dts files for consistency. [cjb: typo fixes, addition of max-frequency property] Signed-off-by: NChris Ball <cjb@laptop.org> Signed-off-by: NArnd Bergmann <arnd@arndb.de>
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- 14 5月, 2012 5 次提交
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由 Kent Yoder 提交于
This patch adds the cas bits to advertise support for the Platform Facilities Option (PFO) based random number generator accerator. The pseries-rng driver provides support for this hardware feature. Signed-off-by: NRobert Jennings <rcj@linux.vnet.ibm.com> Signed-off-by: NKent Yoder <key@linux.vnet.ibm.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Kent Yoder 提交于
Add support for the Platform Facilities Option (PFO) to the VIO bus. These devices have a separate root node in OpenFirmware which requires additional parsing to map into the existing VIO device structure fields. This adds the interface for PFO device drivers to make synchronous hypervisor calls. Signed-off-by: NRobert Jennings <rcj@linux.vnet.ibm.com> Signed-off-by: NKent Yoder <key@linux.vnet.ibm.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Kent Yoder 提交于
This adds an update notifier mechanism for changes to properties in the device tree. One use of this would be a device driver that needs to act on changes to it's properties in the device tree after a live migration or a dynamic activation that is triggered by updates to ofdt properties. Signed-off-by: NRobert Jennings <rcj@linux.vnet.ibm.com> Signed-off-by: NKent Yoder <key@linux.vnet.ibm.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Kent Yoder 提交于
The Platform Facilities Option (PFO) adds several new h_calls and more return codes. Signed-off-by: NRobert Jennings <rcj@linux.vnet.ibm.com> Signed-off-by: NKent Yoder <key@linux.vnet.ibm.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 K.Prasad 提交于
PPC_PTRACE_GETHWDBGINFO, PPC_PTRACE_SETHWDEBUG and PPC_PTRACE_DELHWDEBUG are PowerPC specific ptrace flags that use the watchpoint register. While they are targeted primarily towards BookE users, user-space applications such as GDB have started using them for BookS too. This patch enables the use of generic hardware breakpoint interfaces for these new flags. Apart from the usual benefits of using generic hw-breakpoint interfaces, these changes allow debuggers (such as GDB) to use a common set of ptrace flags for their watchpoint needs and allow more precise breakpoint specification (length of the variable can be specified). Signed-off-by: NK.Prasad <prasad@linux.vnet.ibm.com> Acked-by: NDavid Gibson <david@gibson.dropbear.id.au> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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