kernel.git/arch/s390/include/asm/setup.h, branch linux-4.10.y

s390/console: Make preferred console handling more consistent

2016-07-13T08:58:07Z

Use the same code structure when determining preferred consoles for Linux running as KVM guest as with Linux running in LPAR and z/VM guest: - Extend the console_mode variable to cover vt220 and hvc consoles - Determine sensible console defaults in conmode_default() - Remove KVM-special handling in set_preferred_console() Ensure that the sclp line mode console is also registered when the vt220 console was selected to not change existing behavior that someone might be relying on. As an externally visible change, KVM guest users can now select the 3270 or 3215 console devices using the conmode= kernel parameter, provided that support for the corresponding driver was compiled into the kernel. Signed-off-by: Peter Oberparleiter Signed-off-by: Jing Liu Reviewed-by: Cornelia Huck Signed-off-by: Martin Schwidefsky

s390/fault: merge report_user_fault implementations

2016-03-02T12:44:27Z

We have two close to identical report_user_fault functions. Add a parameter to one and get rid of the other one in order to reduce code duplication. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/setup: cleanup machine flags

2015-12-18T13:59:32Z

Over time some machine flags got unused (e.g. MACHINE_FLAG_MVPG) or are available on all 64bit systems (MACHINE_FLAG_CSP, MACHINE_FLAG_IEEE) - let's remove them. Reorder the other ones to match the order of the MACHINE_HAS_* macros and renumber all bits to avoid holes. Also fix the comment about where the flags are detected. Signed-off-by: Christian Borntraeger Signed-off-by: Martin Schwidefsky

s390/cpumf: rework program parameter setting to detect guest samples

2015-10-14T12:32:12Z

The program parameter can be used to mark hardware samples with some token. Previously, it was used to mark guest samples only. Improve the program parameter doubleword by combining two parts, the leftmost LPP part and the rightmost PID part. Set the PID part for processes by using the task PID. To distinguish host and guest samples for the kernel (PID part is zero), the guest must always set the program paramater to a non-zero value. Use the leftmost bit in the LPP part of the program parameter to be able to detect guest kernel samples. [brueckner@linux.vnet.ibm.com]: Split __LC_CURRENT and introduced __LC_LPP. Corrected __LC_CURRENT users and adjusted assembler parts. And updated the commit message accordingly. Signed-off-by: Christian Borntraeger Signed-off-by: Hendrik Brueckner Reviewed-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/entry: add assembler macro to conveniently tests under mask

2015-10-14T12:32:09Z

Various functions in entry.S perform test-under-mask instructions to test for particular bits in memory. Because test-under-mask uses a mask value of one byte, the mask value and the offset into the memory must be calculated manually. This easily introduces errors and is hard to review and read. Introduce the TSTMSK assembler macro to specify a mask constant and let the macro calculate the offset and the byte mask to generate a test-under-mask instruction. The benefit is that existing symbolic constants can now be used for tests. Also the macro checks for zero mask values and mask values that consist of multiple bytes. Signed-off-by: Hendrik Brueckner Reviewed-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390: remove 31 bit support

2015-03-25T10:49:33Z

Remove the 31 bit support in order to reduce maintenance cost and effectively remove dead code. Since a couple of years there is no distribution left that comes with a 31 bit kernel. The 31 bit kernel also has been broken since more than a year before anybody noticed. In addition I added a removal warning to the kernel shown at ipl for 5 minutes: a960062e5826 ("s390: add 31 bit warning message") which let everybody know about the plan to remove 31 bit code. We didn't get any response. Given that the last 31 bit only machine was introduced in 1999 let's remove the code. Anybody with 31 bit user space code can still use the compat mode. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/spinlock: add compare-and-delay to lock wait loops

2015-01-23T14:17:04Z

Add the compare-and-delay instruction to the spin-lock and rw-lock retry loops. A CPU executing the compare-and-delay instruction stops until the lock value has changed. This is done to make the locking code for contended locks to behave better in regard to the multi- hreading facility. A thread of a core executing a compare-and-delay will allow the other threads of a core to get a larger share of the core resources. Signed-off-by: Martin Schwidefsky

s390: add support for vector extension

2014-10-09T07:14:13Z

The vector extension introduces 32 128-bit vector registers and a set of instruction to operate on the vector registers. The kernel can control the use of vector registers for the problem state program with a bit in control register 0. Once enabled for a process the kernel needs to retain the content of the vector registers on context switch. The signal frame is extended to include the vector registers. Two new register sets NT_S390_VXRS_LOW and NT_S390_VXRS_HIGH are added to the regset interface for the debugger and core dumps. Signed-off-by: Martin Schwidefsky

s390: remove unused MACHINE_FLAG_RRBM

2014-09-09T06:53:26Z

Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/mm: Convert bootmem to memblock

2014-05-20T06:58:40Z

The original bootmem allocator is getting replaced by memblock. To cover the needs of the s390 kdump implementation the physical memory list is used. With this patch the bootmem allocator and its bitmaps are completely removed from s390. Signed-off-by: Philipp Hachtmann Signed-off-by: Martin Schwidefsky