linux/arch/s390/include, branch v3.7.7

s390/thp: implement pmdp_set_wrprotect()

2013-02-04T00:27:01Z

commit be3286507dab888d4aad9f91fd6ff5202b24cd5b upstream. On s390, an architecture-specific implementation of the function pmdp_set_wrprotect() is missing and the generic version is currently being used. The generic version does not flush the tlb as it would be needed on s390 when modifying an active pmd, which can lead to subtle tlb errors on s390 when using transparent hugepages. This patch adds an s390-specific implementation of pmdp_set_wrprotect() including the missing tlb flush. Signed-off-by: Gerald Schaefer Signed-off-by: Martin Schwidefsky Signed-off-by: Greg Kroah-Hartman

s390/time: fix sched_clock() overflow

2013-01-21T19:44:34Z

commit ed4f20943cd4c7b55105c04daedf8d63ab6d499c upstream. Converting a 64 Bit TOD format value to nanoseconds means that the value must be divided by 4.096. In order to achieve that we multiply with 125 and divide by 512. When used within sched_clock() this triggers an overflow after appr. 417 days. Resulting in a sched_clock() return value that is much smaller than previously and therefore may cause all sort of weird things in subsystems that rely on a monotonic sched_clock() behaviour. To fix this implement a tod_to_ns() helper function which converts TOD values without overflow and call this function from both places that open coded the conversion: sched_clock() and kvm_s390_handle_wait(). Reviewed-by: Martin Schwidefsky Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky Signed-off-by: Greg Kroah-Hartman

s390/topology: fix core id vs physical package id mix-up

2012-11-12T15:24:38Z

The current topology code confuses core id vs physical package id. In other words /sys/devices/system/cpu/cpuX/topology/core_id displays the physical_package_id (aka socket id) instead of the core id. The physical_package_id sysfs attribute always displays "-1" instead of the socket id. Fix this mix-up with a small patch which defines and initializes topology_physical_package_id correctly and fixes the broken core id handling. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/signal: set correct address space control

2012-11-12T15:24:38Z

If user space is running in primary mode it can switch to secondary or access register mode, this is used e.g. in the clock_gettime code of the vdso. If a signal is delivered to the user space process while it has been running in access register mode the signal handler is executed in access register mode as well which will result in a crash most of the time. Set the address space control bits in the PSW to the default for the execution of the signal handler and make sure that the previous address space control is restored on signal return. Take care that user space can not switch to the kernel address space by modifying the registers in the signal frame. Cc: stable@vger.kernel.org Signed-off-by: Martin Schwidefsky

s390: Move css limits from drivers/s390/cio/ to include/asm/.

2012-11-06T21:39:49Z

There's no need to keep __MAX_SUBCHANNEL and __MAX_SSID private to the common I/O layer when __MAX_CSSID is usable by everybody. Signed-off-by: Cornelia Huck Signed-off-by: Martin Schwidefsky

s390/thp: respect page protection in pmd_none() and pmd_present()

2012-10-26T14:44:23Z

Similar to pte_none() and pte_present(), the pmd functions should also respect page protection of huge pages, especially PROT_NONE. This patch also simplifies massage_pgprot_pmd() by adding new definitions for huge page protection. Signed-off-by: Gerald Schaefer Signed-off-by: Martin Schwidefsky

s390,uapi: do not use uapi/asm-generic/kvm_para.h

2012-10-19T09:07:18Z

It turns out that S390 shouldn't use uapi/asm-generic/kvm_para.h since it defines the functions in its non-UAPI kvm_para.h file. #including will first pick up include/asm-generic/kvm_para.h, which defines conflicting functions. Instead, partially revert commit 0420c87e648a3b623ad925038a0bcff2ef5a4bc9, ungenericising this file and just inserting a comment to prevent the patch program from deleting it. cc: Yuanhan Liu cc: fengguang.wu@intel.com Reported-by: Yuanhan Liu Signed-off-by: David Howells Signed-off-by: Martin Schwidefsky

perf_cpum_cf: Add support for counters available with IBM zEC12

2012-10-18T15:50:09Z

Increase the maximum number of available counters and check if the hardware supports the counter. Support is indicated by the version of the CPU-measurement counter facility. Signed-off-by: Hendrik Brueckner Signed-off-by: Martin Schwidefsky

s390/chpid: make headers usable (again)

2012-10-18T15:50:07Z

Add back a hunk from "4dcc2a4 s390/chsc: make headers usable" which was lost during the merge of the UAPI patch. Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky

UAPI: Put a comment into uapi/asm-generic/kvm_para.h and use it from arches

2012-10-17T11:32:07Z

Make uapi/asm-generic/kvm_para.h non-empty by addition of a comment to stop the patch program from deleting it when it creates it. Then delete empty arch-specific uapi/asm/kvm_para.h files and tell the Kbuild files to use the generic instead. Should this perhaps instead be a #warning or #error that the facility is unsupported on this arch? Signed-off-by: David Howells cc: Arnd Bergmann cc: Avi Kivity cc: Marcelo Tosatti cc: kvm@vger.kernel.org