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* Kernel: Audit Support For The ARM PlatformNathaniel Husted2012-01-175-8/+24
| | | | | | | | | | | | | | | | | | | | | | | | | This patch provides functionality to audit system call events on the ARM platform. The implementation was based off the structure of the MIPS platform and information in this (http://lists.fedoraproject.org/pipermail/arm/2009-October/000382.html) mailing list thread. The required audit_syscall_exit and audit_syscall_entry checks were added to ptrace using the standard registers for system call values (r0 through r3). A thread information flag was added for auditing (TIF_SYSCALL_AUDIT) and a meta-flag was added (_TIF_SYSCALL_WORK) to simplify modifications to the syscall entry/exit. Now, if either the TRACE flag is set or the AUDIT flag is set, the syscall_trace function will be executed. The prober changes were made to Kconfig to allow CONFIG_AUDITSYSCALL to be enabled. Due to platform availability limitations, this patch was only tested on the Android platform running the modified "android-goldfish-2.6.29" kernel. A test compile was performed using Code Sourcery's cross-compilation toolset and the current linux-3.0 stable kernel. The changes compile without error. I'm hoping, due to the simple modifications, the patch is "obviously correct". Signed-off-by: Nathaniel Husted <nhusted@gmail.com> Signed-off-by: Eric Paris <eparis@redhat.com>
* audit: inline audit_syscall_entry to reduce burden on archsEric Paris2012-01-1714-82/+61
| | | | | | | | | | | | | Every arch calls: if (unlikely(current->audit_context)) audit_syscall_entry() which requires knowledge about audit (the existance of audit_context) in the arch code. Just do it all in static inline in audit.h so that arch's can remain blissfully ignorant. Signed-off-by: Eric Paris <eparis@redhat.com>
* audit: ia32entry.S sign extend error codes when calling 64 bit codeEric Paris2012-01-171-1/+3
| | | | | | | | | | | | | | | | | | In the ia32entry syscall exit audit fastpath we have assembly code which calls __audit_syscall_exit directly. This code was, however, zeroes the upper 32 bits of the return code. It then proceeded to call code which expects longs to be 64bits long. In order to handle code which expects longs to be 64bit we sign extend the return code if that code is an error. Thus the __audit_syscall_exit function can correctly handle using the values in snprintf("%ld"). This fixes the regression introduced in 5cbf1565f29eb57a86a. Old record: type=SYSCALL msg=audit(1306197182.256:281): arch=40000003 syscall=192 success=no exit=4294967283 New record: type=SYSCALL msg=audit(1306197182.256:281): arch=40000003 syscall=192 success=no exit=-13 Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: H. Peter Anvin <hpa@zytor.com>
* Audit: push audit success and retcode into arch ptrace.hEric Paris2012-01-1723-62/+96
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The audit system previously expected arches calling to audit_syscall_exit to supply as arguments if the syscall was a success and what the return code was. Audit also provides a helper AUDITSC_RESULT which was supposed to simplify things by converting from negative retcodes to an audit internal magic value stating success or failure. This helper was wrong and could indicate that a valid pointer returned to userspace was a failed syscall. The fix is to fix the layering foolishness. We now pass audit_syscall_exit a struct pt_reg and it in turns calls back into arch code to collect the return value and to determine if the syscall was a success or failure. We also define a generic is_syscall_success() macro which determines success/failure based on if the value is < -MAX_ERRNO. This works for arches like x86 which do not use a separate mechanism to indicate syscall failure. We make both the is_syscall_success() and regs_return_value() static inlines instead of macros. The reason is because the audit function must take a void* for the regs. (uml calls theirs struct uml_pt_regs instead of just struct pt_regs so audit_syscall_exit can't take a struct pt_regs). Since the audit function takes a void* we need to use static inlines to cast it back to the arch correct structure to dereference it. The other major change is that on some arches, like ia64, MIPS and ppc, we change regs_return_value() to give us the negative value on syscall failure. THE only other user of this macro, kretprobe_example.c, won't notice and it makes the value signed consistently for the audit functions across all archs. In arch/sh/kernel/ptrace_64.c I see that we were using regs[9] in the old audit code as the return value. But the ptrace_64.h code defined the macro regs_return_value() as regs[3]. I have no idea which one is correct, but this patch now uses the regs_return_value() function, so it now uses regs[3]. For powerpc we previously used regs->result but now use the regs_return_value() function which uses regs->gprs[3]. regs->gprs[3] is always positive so the regs_return_value(), much like ia64 makes it negative before calling the audit code when appropriate. Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: H. Peter Anvin <hpa@zytor.com> [for x86 portion] Acked-by: Tony Luck <tony.luck@intel.com> [for ia64] Acked-by: Richard Weinberger <richard@nod.at> [for uml] Acked-by: David S. Miller <davem@davemloft.net> [for sparc] Acked-by: Ralf Baechle <ralf@linux-mips.org> [for mips] Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [for ppc]
* Merge branch 'x86-platform-for-linus' of ↵Linus Torvalds2012-01-1210-21/+70
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip * 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/intel config: Fix the APB_TIMER selection x86/mrst: Add additional debug prints for pb_keys x86/intel config: Revamp configuration to allow for Moorestown and Medfield x86/intel/scu/ipc: Match the changes in the x86 configuration x86/apb: Fix configuration constraints x86: Fix INTEL_MID silly x86/Kconfig: Cyclone-timer depends on x86-summit x86: Reduce clock calibration time during slave cpu startup x86/config: Revamp configuration for MID devices x86/sfi: Kill the IRQ as id hack
| * x86/intel config: Fix the APB_TIMER selectionAlan Cox2011-12-291-2/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Seems Kconfig SELECT isn't selecting things hierarchically when selected. config APB_TIMER def_bool y if X86_INTEL_MID prompt "Intel MID APB Timer Support" if X86_INTEL_MID select DW_APB_TIMER depends on X86_INTEL_MID && SFI when we select APB_TIMER doesn't select DW_APB_TIMER so do it by hand. Signed-off-by: Alan Cox <alan@linux.intel.com> Link: http://lkml.kernel.org/n/tip-kpnaimplltk6d1lolusqj3ae@git.kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * Merge commit 'v3.2-rc6' into x86/platformIngo Molnar2011-12-1888-307/+511
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| * | x86/mrst: Add additional debug prints for pb_keysMichael Demeter2011-12-181-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Added additional debug output that we always seem to add during power ons to validate firmware operation. Signed-off-by: Michael Demeter <michael.demeter@intel.com> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Link: http://lkml.kernel.org/r/20111215223116.10166.50803.stgit@bob.linux.org.uk [ fixed line breaks, formatting and commit title. ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86/intel config: Revamp configuration to allow for Moorestown and MedfieldAlan Cox2011-12-185-7/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | This sets all up the other bits that need to be INTEL_MID specific rather than Moorestown specific. Signed-off-by: Alan Cox <alan@linux.intel.com> Link: http://lkml.kernel.org/r/20111217174318.7207.91543.stgit@bob.linux.org.uk Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86/apb: Fix configuration constraintsAlan Cox2011-12-181-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | The APB timer requires SFI, SCU and MID support Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Alan Cox <alan@linux.intel.com> Link: http://lkml.kernel.org/r/20111217215719.3743.93550.stgit@bob.linux.org.uk Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: Fix INTEL_MID sillyAlan Cox2011-12-161-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Doh.. pass the brown paper bags - preferably filled with mince pies.. This fixes occasional build failures. Signed-off-by: Alan Cox <alan@linux.intel.com> Link: http://lkml.kernel.org/n/tip-r0oc1knlvzuqr69artaeq8s8@git.kernel.org [ extended the changelog a bit ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86/Kconfig: Cyclone-timer depends on x86-summitAlessandro Rubini2011-12-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CONFIG_X86_CYCLONE_TIMER depends on CONFIG_X86_32_NON_STANDARD, which forces drivers/clocksource/cyclone.c to be compiled. The file doesn't do anything unless enabled by arch/x86/kernel/apic/summit_32.c Make CONFIG_X86_CYCLONE_TIMER depend by X86_SUMMIT instead, to avoid unnecessary code in other non-standard systems. Signed-off-by: Alessandro Rubini <rubini@gnudd.com> Cc: john stultz <johnstul@us.ibm.com> Link: http://lkml.kernel.org/r/20111028224842.GA7582@mail.gnudd.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: Reduce clock calibration time during slave cpu startupJack Steiner2011-12-052-5/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reduce the startup time for slave cpus. Adds hooks for an arch-specific function for clock calibration. These hooks are used on x86. If a newly started cpu has the same phys_proc_id as a core already active, uses the TSC for the delay loop and has a CONSTANT_TSC, use the already-calculated value of loops_per_jiffy. This patch reduces the time required to start slave cpus on a 4096 cpu system from: 465 sec OLD 62 sec NEW This reduces boot time on a 4096p system by almost 7 minutes. Nice... Signed-off-by: Jack Steiner <steiner@sgi.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: John Stultz <john.stultz@linaro.org> [fix CONFIG_SMP=n build] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86/config: Revamp configuration for MID devicesAlan Cox2011-12-054-5/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This follows on from the patch applied in 3.2rc1 which creates an INTEL_MID configuration. We can now add the entry for Medfield specific code. After this is merged the final patch will be submitted which moves the rest of the device Kconfig dependancies to MRST/MEDFIELD/INTEL_MID as appropriate. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86/sfi: Kill the IRQ as id hackAlan Cox2011-12-051-2/+1
| | | | | | | | | | | | | | | | | | | | | Nothing should now need it so take it out Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | Merge branch 'x86-debug-for-linus' of ↵Linus Torvalds2012-01-128-10/+309
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip * 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, reboot: Fix typo in nmi reboot path x86, NMI: Add to_cpumask() to silence compile warning x86, NMI: NMI selftest depends on the local apic x86: Add stack top margin for stack overflow checking x86, NMI: NMI-selftest should handle the UP case properly x86: Fix the 32-bit stackoverflow-debug build x86, NMI: Add knob to disable using NMI IPIs to stop cpus x86, NMI: Add NMI IPI selftest x86, reboot: Use NMI instead of REBOOT_VECTOR to stop cpus x86: Clean up the range of stack overflow checking x86: Panic on detection of stack overflow x86: Check stack overflow in detail
| * | | x86, reboot: Fix typo in nmi reboot pathDon Zickus2012-01-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It was brought to my attention that my x86 change to use NMI in the reboot path broke Intel Nehalem and Westmere boxes when using kexec. I realized I had mistyped the if statement in commit 3603a2512f9e69dc87914ba922eb4a0812b21cd6 and stuck the ')' in the wrong spot. Putting it in the right spot fixes kexec again. Doh. Reported-by: Yinghai Lu <yinghai@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Don Zickus <dzickus@redhat.com> Link: http://lkml.kernel.org/r/1325866671-9797-1-git-send-email-dzickus@redhat.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86, NMI: Add to_cpumask() to silence compile warningDan Carpenter2011-12-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Gcc complains if we don't cast this to a struct cpumask pointer. arch/x86/kernel/nmi_selftest.c:93:2: warning: passing argument 1 of ‘cpumask_empty’ from incompatible pointer type [enabled by default] Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: Don Zickus <dzickus@redhat.com> Link: http://lkml.kernel.org/r/20111207110612.GA3437@mwanda Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86, NMI: NMI selftest depends on the local apicDon Zickus2011-12-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The selftest doesn't work with out a local apic for now. Reported-by: Randy Durlap <rdunlap@xenotime.net> Signed-off-by: Don Zickus <dzickus@redhat.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Link: http://lkml.kernel.org/r/20111207210630.GI1669@redhat.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86: Add stack top margin for stack overflow checkingMitsuo Hayasaka2011-12-071-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It seems that a margin for stack overflow checking is added to top of a kernel stack but is not added to IRQ and exception stacks in stack_overflow_check(). Therefore, the overflows of IRQ and exception stacks are always detected only after they actually occurred and data corruption might occur due to them. This patch adds the margin to top of IRQ and exception stacks as well as a kernel stack to enhance reliability. Signed-off-by: Mitsuo Hayasaka <mitsuo.hayasaka.hu@hitachi.com> Cc: yrl.pp-manager.tt@hitachi.com Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/r/20111207082910.9847.3359.stgit@ltc219.sdl.hitachi.co.jp [ removed the #undef - we typically don't do that for uncommon names ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86, NMI: NMI-selftest should handle the UP case properlyDon Zickus2011-12-061-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If no remote cpus are online, then just quietly skip the remote IPI test for now. Signed-off-by: Don Zickus <dzickus@redhat.com> Cc: andi@firstfloor.org Cc: torvalds@linux-foundation.org Cc: peterz@infradead.org Cc: robert.richter@amd.com Link: http://lkml.kernel.org/r/20111206180859.GR1669@redhat.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86: Fix the 32-bit stackoverflow-debug buildIngo Molnar2011-12-051-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The panic_on_stackoverflow variable needs to be avilable on the 32-bit side as well ... Cc: Mitsuo Hayasaka <mitsuo.hayasaka.hu@hitachi.com> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: "H. Peter Anvin" <hpa@zytor.com> Link: http://lkml.kernel.org/r/20111129060836.11076.12323.stgit@ltc219.sdl.hitachi.co.jp Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86, NMI: Add knob to disable using NMI IPIs to stop cpusDon Zickus2011-12-051-0/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some machines may exhibit problems using the NMI to stop other cpus. This knob just allows one to revert back to the original behaviour to help diagnose the problem. V2: make function static Signed-off-by: Don Zickus <dzickus@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robert Richter <robert.richter@amd.com> Cc: seiji.aguchi@hds.com Cc: vgoyal@redhat.com Cc: mjg@redhat.com Cc: tony.luck@intel.com Cc: gong.chen@intel.com Cc: satoru.moriya@hds.com Cc: avi@redhat.com Cc: Andi Kleen <andi@firstfloor.org> Link: http://lkml.kernel.org/r/1318533267-18880-4-git-send-email-dzickus@redhat.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86, NMI: Add NMI IPI selftestDon Zickus2011-12-055-0/+199
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The previous patch modified the stop cpus path to use NMI instead of IRQ as the way to communicate to the other cpus to shutdown. There were some concerns that various machines may have problems with using an NMI IPI. This patch creates a selftest to check if NMI is working at boot. The idea is to help catch any issues before the machine panics and we learn the hard way. Loosely based on the locking-selftest.c file, this separate file runs a couple of simple tests and reports the results. The output looks like: ... Brought up 4 CPUs ---------------- | NMI testsuite: -------------------- remote IPI: ok | local IPI: ok | -------------------- Good, all 2 testcases passed! | --------------------------------- Total of 4 processors activated (21330.61 BogoMIPS). ... Signed-off-by: Don Zickus <dzickus@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robert Richter <robert.richter@amd.com> Cc: seiji.aguchi@hds.com Cc: vgoyal@redhat.com Cc: mjg@redhat.com Cc: tony.luck@intel.com Cc: gong.chen@intel.com Cc: satoru.moriya@hds.com Cc: avi@redhat.com Cc: Andi Kleen <andi@firstfloor.org> Link: http://lkml.kernel.org/r/1318533267-18880-3-git-send-email-dzickus@redhat.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86, reboot: Use NMI instead of REBOOT_VECTOR to stop cpusDon Zickus2011-12-051-2/+57
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A recent discussion started talking about the locking on the pstore fs and how it relates to the kmsg infrastructure. We noticed it was possible for userspace to r/w to the pstore fs (grabbing the locks in the process) and block the panic path from r/w to the same fs. The reason was the cpu with the lock could be doing work while the crashing cpu is panic'ing. Busting those spinlocks might cause those cpus to step on each other's data. Fine, fair enough. It was suggested it would be nice to serialize the panic path (ie stop the other cpus) and have only one cpu running. This would allow us to bust the spinlocks and not worry about another cpu stepping on the data. Of course, smp_send_stop() does this in the panic case. kmsg_dump() would have to be moved to be called after it. Easy enough. The only problem is on x86 the smp_send_stop() function calls the REBOOT_VECTOR. Any cpu with irqs disabled (which pstore and its backend ERST would do), block this IPI and thus do not stop. This makes it difficult to reliably log data to the pstore fs. The patch below switches from the REBOOT_VECTOR to NMI (and mimics what kdump does). Switching to NMI allows us to deliver the IPI when irqs are disabled, increasing the reliability of this function. However, Andi carefully noted that on some machines this approach does not work because of broken BIOSes or whatever. To help accomodate this, the next couple of patches will run a selftest and provide a knob to disable. V2: uses atomic ops to serialize the cpu that shuts everyone down V3: comment cleanup Signed-off-by: Don Zickus <dzickus@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robert Richter <robert.richter@amd.com> Cc: seiji.aguchi@hds.com Cc: vgoyal@redhat.com Cc: mjg@redhat.com Cc: tony.luck@intel.com Cc: gong.chen@intel.com Cc: satoru.moriya@hds.com Cc: avi@redhat.com Cc: Andi Kleen <andi@firstfloor.org> Link: http://lkml.kernel.org/r/1318533267-18880-2-git-send-email-dzickus@redhat.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86: Clean up the range of stack overflow checkingMitsuo Hayasaka2011-12-051-4/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The overflow checking of kernel stack checks if the stack pointer points to the available kernel stack range, which is derived from the original overflow checking. It is clear that curbase address is always less than low boundary of available kernel stack. So, this patch removes the first condition that checks if the pointer is higher than curbase. Signed-off-by: Mitsuo Hayasaka <mitsuo.hayasaka.hu@hitachi.com> Cc: yrl.pp-manager.tt@hitachi.com Cc: Randy Dunlap <rdunlap@xenotime.net> Link: http://lkml.kernel.org/r/20111129060845.11076.40916.stgit@ltc219.sdl.hitachi.co.jp Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: "H. Peter Anvin" <hpa@zytor.com>
| * | | x86: Panic on detection of stack overflowMitsuo Hayasaka2011-12-052-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, messages are just output on the detection of stack overflow, which is not sufficient for systems that need a high reliability. This is because in general the overflow may corrupt data, and the additional corruption may occur due to reading them unless systems stop. This patch adds the sysctl parameter kernel.panic_on_stackoverflow and causes a panic when detecting the overflows of kernel, IRQ and exception stacks except user stack according to the parameter. It is disabled by default. Signed-off-by: Mitsuo Hayasaka <mitsuo.hayasaka.hu@hitachi.com> Cc: yrl.pp-manager.tt@hitachi.com Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: "H. Peter Anvin" <hpa@zytor.com> Link: http://lkml.kernel.org/r/20111129060836.11076.12323.stgit@ltc219.sdl.hitachi.co.jp Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86: Check stack overflow in detailMitsuo Hayasaka2011-12-052-8/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, only kernel stack is checked for the overflow, which is not sufficient for systems that need a high reliability. To enhance it, it is required to check the IRQ and exception stacks, as well. This patch checks all the stack types and will cause messages of stacks in detail when free stack space drops below a certain limit except user stack. Signed-off-by: Mitsuo Hayasaka <mitsuo.hayasaka.hu@hitachi.com> Cc: yrl.pp-manager.tt@hitachi.com Cc: Randy Dunlap <rdunlap@xenotime.net> Link: http://lkml.kernel.org/r/20111129060829.11076.51733.stgit@ltc219.sdl.hitachi.co.jp Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: "H. Peter Anvin" <hpa@zytor.com>
* | | | Merge branch 'x86-efi-for-linus' of ↵Linus Torvalds2012-01-1216-7/+1478
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip * 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, efi: Break up large initrd reads x86, efi: EFI boot stub support efi: Add EFI file I/O data types efi.h: Add boottime->locate_handle search types efi.h: Add graphics protocol guids efi.h: Add allocation types for boottime->allocate_pages() efi.h: Add efi_image_loaded_t efi.h: Add struct definition for boot time services x86: Don't use magic strings for EFI loader signature x86: Add missing bzImage fields to struct setup_header
| * | | | x86, efi: Break up large initrd readsMaarten Lankhorst2011-12-162-6/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The efi boot stub tries to read the entire initrd in 1 go, however some efi implementations hang if too much if asked to read too much data at the same time. After some experimentation I found out that my asrock p67 board will hang if asked to read chunks of 4MiB, so use a safe value. elilo reads in chunks of 16KiB, but since that requires many read calls I use a value of 1 MiB. hpa suggested adding individual blacklists for when systems are found where this value causes a crash. Signed-off-by: Maarten Lankhorst <m.b.lankhorst@gmail.com> Link: http://lkml.kernel.org/r/4EEB3A02.3090201@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | | | x86, efi: EFI boot stub supportMatt Fleming2011-12-1213-1/+1462
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is currently a large divide between kernel development and the development of EFI boot loaders. The idea behind this patch is to give the kernel developers full control over the EFI boot process. As H. Peter Anvin put it, "The 'kernel carries its own stub' approach been very successful in dealing with BIOS, and would make a lot of sense to me for EFI as well." This patch introduces an EFI boot stub that allows an x86 bzImage to be loaded and executed by EFI firmware. The bzImage appears to the firmware as an EFI application. Luckily there are enough free bits within the bzImage header so that it can masquerade as an EFI application, thereby coercing the EFI firmware into loading it and jumping to its entry point. The beauty of this masquerading approach is that both BIOS and EFI boot loaders can still load and run the same bzImage, thereby allowing a single kernel image to work in any boot environment. The EFI boot stub supports multiple initrds, but they must exist on the same partition as the bzImage. Command-line arguments for the kernel can be appended after the bzImage name when run from the EFI shell, e.g. Shell> bzImage console=ttyS0 root=/dev/sdb initrd=initrd.img v7: - Fix checkpatch warnings. v6: - Try to allocate initrd memory just below hdr->inird_addr_max. v5: - load_options_size is UTF-16, which needs dividing by 2 to convert to the corresponding ASCII size. v4: - Don't read more than image->load_options_size v3: - Fix following warnings when compiling CONFIG_EFI_STUB=n arch/x86/boot/tools/build.c: In function ‘main’: arch/x86/boot/tools/build.c:138:24: warning: unused variable ‘pe_header’ arch/x86/boot/tools/build.c:138:15: warning: unused variable ‘file_sz’ - As reported by Matthew Garrett, some Apple machines have GOPs that don't have hardware attached. We need to weed these out by searching for ones that handle the PCIIO protocol. - Don't allocate memory if no initrds are on cmdline - Don't trust image->load_options_size Maarten Lankhorst noted: - Don't strip first argument when booted from efibootmgr - Don't allocate too much memory for cmdline - Don't update cmdline_size, the kernel considers it read-only - Don't accept '\n' for initrd names v2: - File alignment was too large, was 8192 should be 512. Reported by Maarten Lankhorst on LKML. - Added UGA support for graphics - Use VIDEO_TYPE_EFI instead of hard-coded number. - Move linelength assignment until after we've assigned depth - Dynamically fill out AddressOfEntryPoint in tools/build.c - Don't use magic number for GDT/TSS stuff. Requested by Andi Kleen - The bzImage may need to be relocated as it may have been loaded at a high address address by the firmware. This was required to get my macbook booting because the firmware loaded it at 0x7cxxxxxx, which triggers this error in decompress_kernel(), if (heap > ((-__PAGE_OFFSET-(128<<20)-1) & 0x7fffffff)) error("Destination address too large"); Cc: Mike Waychison <mikew@google.com> Cc: Matthew Garrett <mjg@redhat.com> Tested-by: Henrik Rydberg <rydberg@euromail.se> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Link: http://lkml.kernel.org/r/1321383097.2657.9.camel@mfleming-mobl1.ger.corp.intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | | | x86: Don't use magic strings for EFI loader signatureMatt Fleming2011-12-102-6/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce a symbol, EFI_LOADER_SIGNATURE instead of using the magic strings, which also helps to reduce the amount of ifdeffery. Cc: Matthew Garrett <mjg@redhat.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Link: http://lkml.kernel.org/r/1318848017-12301-1-git-send-email-matt@console-pimps.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | | | x86: Add missing bzImage fields to struct setup_headerMatt Fleming2011-12-101-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit 37ba7ab5e33c ("x86, boot: make kernel_alignment adjustable; new bzImage fields") introduced some new fields into the bzImage header but struct setup_header was not updated accordingly. Add the missing 'pref_address' and 'init_size' fields. Signed-off-by: Matt Fleming <matt.fleming@intel.com> Link: http://lkml.kernel.org/r/1318848017-12301-1-git-send-email-matt@console-pimps.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* | | | | Merge branch 'x86-mm-for-linus' of ↵Linus Torvalds2012-01-128-75/+69
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip * 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/numa: Add constraints check for nid parameters mm, x86: Remove debug_pagealloc_enabled x86/mm: Initialize high mem before free_all_bootmem() arch/x86/kernel/e820.c: quiet sparse noise about plain integer as NULL pointer arch/x86/kernel/e820.c: Eliminate bubble sort from sanitize_e820_map() x86: Fix mmap random address range x86, mm: Unify zone_sizes_init() x86, mm: Prepare zone_sizes_init() for unification x86, mm: Use max_low_pfn for ZONE_NORMAL on 64-bit x86, mm: Wrap ZONE_DMA32 with CONFIG_ZONE_DMA32 x86, mm: Use max_pfn instead of highend_pfn x86, mm: Move zone init from paging_init() on 64-bit x86, mm: Use MAX_DMA_PFN for ZONE_DMA on 32-bit
| * | | | | x86/numa: Add constraints check for nid parametersPetr Holasek2011-12-091-4/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds constraint checks to the numa_set_distance() function. When the check triggers (this should not happen normally) it emits a warning and avoids a store to a negative index in numa_distance[] array - i.e. avoids memory corruption. Negative ids can be passed when the pxm-to-nids mapping is not properly filled while parsing the SRAT. Signed-off-by: Petr Holasek <pholasek@redhat.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Anton Arapov <anton@redhat.com> Link: http://lkml.kernel.org/r/20111208121640.GA2229@dhcp-27-244.brq.redhat.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | mm, x86: Remove debug_pagealloc_enabledStanislaw Gruszka2011-12-061-6/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When (no)bootmem finish operation, it pass pages to buddy allocator. Since debug_pagealloc_enabled is not set, we will do not protect pages, what is not what we want with CONFIG_DEBUG_PAGEALLOC=y. To fix remove debug_pagealloc_enabled. That variable was introduced by commit 12d6f21e "x86: do not PSE on CONFIG_DEBUG_PAGEALLOC=y" to get more CPA (change page attribude) code testing. But currently we have CONFIG_CPA_DEBUG, which test CPA. Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Acked-by: Mel Gorman <mgorman@suse.de> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/1322582711-14571-1-git-send-email-sgruszka@redhat.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | x86/mm: Initialize high mem before free_all_bootmem()Stanislaw Gruszka2011-12-061-2/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch fixes a boot crash with pagealloc debugging enabled: Initializing HighMem for node 0 (000377fe:0003fff0) BUG: unable to handle kernel paging request at f6fefe80 IP: [<c1621ab5>] find_range_array+0x5e/0x69 [...] Call Trace: [<c1622064>] __get_free_all_memory_range+0x39/0xb4 [<c1620dd0>] add_highpages_with_active_regions+0x18/0x9b [<c1621a2e>] set_highmem_pages_init+0x70/0x90 [<c162122b>] mem_init+0x50/0x21b [<c16155bd>] start_kernel+0x1bf/0x31c [<c1615065>] i386_start_kernel+0x65/0x67 The crash happens when memblock wants to allocate big area for temporary "struct range" array and reuses pages from top of low memory, which were already passed to the buddy allocator. Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Cc: linux-mm@kvack.org Cc: Mel Gorman <mgorman@suse.de> Link: http://lkml.kernel.org/r/20111206080833.GB3105@redhat.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | arch/x86/kernel/e820.c: quiet sparse noise about plain integer as NULL pointerH Hartley Sweeten2011-12-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The last parameter to sort() is a pointer to the function used to swap items. This parameter should be NULL, not 0, when not used. This quiets the following sparse warning: warning: Using plain integer as NULL pointer Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: hartleys@visionengravers.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | arch/x86/kernel/e820.c: Eliminate bubble sort from sanitize_e820_map()Mike Ditto2011-12-051-35/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Replace the bubble sort in sanitize_e820_map() with a call to the generic kernel sort function to avoid pathological performance with large maps. On large (thousands of entries) E820 maps, the previous code took minutes to run; with this change it's now milliseconds. Signed-off-by: Mike Ditto <mditto@google.com> Cc: sassmann@kpanic.de Cc: yuenn@google.com Cc: Stefan Assmann <sassmann@kpanic.de> Cc: Nancy Yuen <yuenn@google.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | x86: Fix mmap random address rangeLudwig Nussel2011-12-051-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On x86_32 casting the unsigned int result of get_random_int() to long may result in a negative value. On x86_32 the range of mmap_rnd() therefore was -255 to 255. The 32bit mode on x86_64 used 0 to 255 as intended. The bug was introduced by 675a081 ("x86: unify mmap_{32|64}.c") in January 2008. Signed-off-by: Ludwig Nussel <ludwig.nussel@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: harvey.harrison@gmail.com Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/r/201111152246.pAFMklOB028527@wpaz5.hot.corp.google.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | x86, mm: Unify zone_sizes_init()Pekka Enberg2011-11-114-38/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that zone_sizes_init() is identical on 32-bit and 64-bit, move the code to arch/x86/mm/init.c and use it for both architectures. Acked-by: Tejun Heo <tj@kernel.org> Acked-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Pekka Enberg <penberg@kernel.org> Link: http://lkml.kernel.org/r/1320155902-10424-7-git-send-email-penberg@kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | x86, mm: Prepare zone_sizes_init() for unificationPekka Enberg2011-11-112-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make 32-bit and 64-bit zone_sizes_init() identical in preparation for unification. Acked-by: Tejun Heo <tj@kernel.org> Acked-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Pekka Enberg <penberg@kernel.org> Link: http://lkml.kernel.org/r/1320155902-10424-6-git-send-email-penberg@kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | x86, mm: Use max_low_pfn for ZONE_NORMAL on 64-bitPekka Enberg2011-11-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 64-bit has no highmem so max_low_pfn is always the same as 'max_pfn'. Acked-by: Tejun Heo <tj@kernel.org> Acked-by: Yinghai Lu <yinghai@kernel.org> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Pekka Enberg <penberg@kernel.org> Link: http://lkml.kernel.org/r/1320155902-10424-5-git-send-email-penberg@kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | x86, mm: Wrap ZONE_DMA32 with CONFIG_ZONE_DMA32Pekka Enberg2011-11-111-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In preparation for unifying 32-bit and 64-bit zone_sizes_init() make sure ZONE_DMA32 is wrapped in CONFIG_ZONE_DMA32. Acked-by: Tejun Heo <tj@kernel.org> Acked-by: Yinghai Lu <yinghai@kernel.org> Acked-by: David Rientjes <rientjes@google.com> Acked-by: Arun Sharma <asharma@fb.com> Signed-off-by: Pekka Enberg <penberg@kernel.org> Link: http://lkml.kernel.org/r/1320155902-10424-4-git-send-email-penberg@kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | x86, mm: Use max_pfn instead of highend_pfnPekka Enberg2011-11-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The 'highend_pfn' variable is always set to 'max_pfn' so just use the latter directly. Acked-by: Tejun Heo <tj@kernel.org> Acked-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Pekka Enberg <penberg@kernel.org> Link: http://lkml.kernel.org/r/1320155902-10424-3-git-send-email-penberg@kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | x86, mm: Move zone init from paging_init() on 64-bitPekka Enberg2011-11-111-2/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch introduces a zone_sizes_init() helper function on 64-bit to make it more similar to 32-bit init. Acked-by: Tejun Heo <tj@kernel.org> Acked-by: Yinghai Lu <yinghai@kernel.org> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Pekka Enberg <penberg@kernel.org> Link: http://lkml.kernel.org/r/1320155902-10424-2-git-send-email-penberg@kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | x86, mm: Use MAX_DMA_PFN for ZONE_DMA on 32-bitPekka Enberg2011-11-111-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use MAX_DMA_PFN which represents the 16 MB ISA DMA limit on 32-bit x86 just like we do on 64-bit. Acked-by: Tejun Heo <tj@kernel.org> Acked-by: Yinghai Lu <yinghai@kernel.org> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Pekka Enberg <penberg@kernel.org> Link: http://lkml.kernel.org/r/1320155902-10424-1-git-send-email-penberg@kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | | Merge branch 'next' of ↵Linus Torvalds2012-01-122-171/+34
|\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: (23 commits) [CPUFREQ] EXYNOS: Removed useless headers and codes [CPUFREQ] EXYNOS: Make EXYNOS common cpufreq driver [CPUFREQ] powernow-k8: Update copyright, maintainer and documentation information [CPUFREQ] powernow-k8: Fix indexing issue [CPUFREQ] powernow-k8: Avoid Pstate MSR accesses on systems supporting CPB [CPUFREQ] update lpj only if frequency has changed [CPUFREQ] cpufreq:userspace: fix cpu_cur_freq updation [CPUFREQ] Remove wall variable from cpufreq_gov_dbs_init() [CPUFREQ] EXYNOS4210: cpufreq code is changed for stable working [CPUFREQ] EXYNOS4210: Update frequency table for cpu divider [CPUFREQ] EXYNOS4210: Remove code about bus on cpufreq [CPUFREQ] s3c64xx: Use pr_fmt() for consistent log messages cpufreq: OMAP: fixup for omap_device changes, include <linux/module.h> cpufreq: OMAP: fix freq_table leak cpufreq: OMAP: put clk if cpu_init failed cpufreq: OMAP: only supports OPP library cpufreq: OMAP: dont support !freq_table cpufreq: OMAP: deny initialization if no mpudev cpufreq: OMAP: move clk name decision to init cpufreq: OMAP: notify even with bad boot frequency ...
| * | | | | | [CPUFREQ] EXYNOS: Make EXYNOS common cpufreq driverJaecheol Lee2012-01-091-0/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To support various EXYNOS series SoCs commonly, added exynos common structure. exynos-cpufreq.c => EXYNOS series common cpufreq driver exynos4210-cpufreq.c => EXYNOS4210 support cpufreq driver Signed-off-by: Jaecheol Lee <jc.lee@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
| * | | | | | Merge branch 'for_3.3/omap-cpufreq' of ↵Dave Jones2011-12-022-172/+0
| |\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm into next
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 17:45:35 +0100