BMC/Intel-BMC/linux.git/arch/s390/include/asm/sclp.h, branch dev

s390/smp: cleanup core vs. cpu in the SCLP interface

2015-06-25T07:39:24+00:00

The SCLP interface to query, configure and deconfigure CPUs actually operates on cores. For a machine without the multi-threading faciltiy a CPU and a core are equivalent but starting with System z13 a core can have multiple hardware threads, also referred to as logical CPUs. To avoid confusion replace the word 'cpu' with 'core' in the SCLP interface. Also replace MAX_CPU_ADDRESS with SCLP_MAX_CORES. The core-id is an 8-bit field, the maximum thread id is in the range 0-31. The theoretical limit for the CPU address is therefore 8191. Signed-off-by: Martin Schwidefsky

s390/sclp: move sclp_facilities into "struct sclp"

2015-05-13T07:58:18+00:00

Let's also move the facilities into the sclp struct, so we can avoid another separate external variable. Acked-by: Martin Schwidefsky Signed-off-by: David Hildenbrand Signed-off-by: Martin Schwidefsky

s390/sclp: get rid of sclp_get_mtid() and sclp_get_mtid_max()

2015-05-13T07:58:17+00:00

As all relevant sclp data is now directly accessible, let's move the logic of these two functions to the single caller. Acked-by: Martin Schwidefsky Signed-off-by: David Hildenbrand Signed-off-by: Martin Schwidefsky

s390/sclp: unify basic sclp access by exposing "struct sclp"

2015-05-13T07:58:17+00:00

Let's unify basic access to sclp fields by storing the data in an external struct in asm/sclp.h. The values can now directly be accessed by other components, so there is no need for most accessor functions and external variables anymore. The mtid, mtid_max and facility part will be cleaned up separately. Acked-by: Martin Schwidefsky Signed-off-by: David Hildenbrand Signed-off-by: Martin Schwidefsky

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2015-02-13T17:55:09+00:00

Pull KVM update from Paolo Bonzini: "Fairly small update, but there are some interesting new features. Common: Optional support for adding a small amount of polling on each HLT instruction executed in the guest (or equivalent for other architectures). This can improve latency up to 50% on some scenarios (e.g. O_DSYNC writes or TCP_RR netperf tests). This also has to be enabled manually for now, but the plan is to auto-tune this in the future. ARM/ARM64: The highlights are support for GICv3 emulation and dirty page tracking s390: Several optimizations and bugfixes. Also a first: a feature exposed by KVM (UUID and long guest name in /proc/sysinfo) before it is available in IBM's hypervisor! :) MIPS: Bugfixes. x86: Support for PML (page modification logging, a new feature in Broadwell Xeons that speeds up dirty page tracking), nested virtualization improvements (nested APICv---a nice optimization), usual round of emulation fixes. There is also a new option to reduce latency of the TSC deadline timer in the guest; this needs to be tuned manually. Some commits are common between this pull and Catalin's; I see you have already included his tree. Powerpc: Nothing yet. The KVM/PPC changes will come in through the PPC maintainers, because I haven't received them yet and I might end up being offline for some part of next week" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (130 commits) KVM: ia64: drop kvm.h from installed user headers KVM: x86: fix build with !CONFIG_SMP KVM: x86: emulate: correct page fault error code for NoWrite instructions KVM: Disable compat ioctl for s390 KVM: s390: add cpu model support KVM: s390: use facilities and cpu_id per KVM KVM: s390/CPACF: Choose crypto control block format s390/kernel: Update /proc/sysinfo file with Extended Name and UUID KVM: s390: reenable LPP facility KVM: s390: floating irqs: fix user triggerable endless loop kvm: add halt_poll_ns module parameter kvm: remove KVM_MMIO_SIZE KVM: MIPS: Don't leak FPU/DSP to guest KVM: MIPS: Disable HTW while in guest KVM: nVMX: Enable nested posted interrupt processing KVM: nVMX: Enable nested virtual interrupt delivery KVM: nVMX: Enable nested apic register virtualization KVM: nVMX: Make nested control MSRs per-cpu KVM: nVMX: Enable nested virtualize x2apic mode KVM: nVMX: Prepare for using hardware MSR bitmap ...

s390/sclp: introduce check for the SIGP Interpretation Facility

2015-01-23T12:25:35+00:00

This patch introduces the infrastructure to check whether the SIGP Interpretation Facility is installed on all VCPUs in the configuration. Signed-off-by: David Hildenbrand Acked-by: Cornelia Huck Signed-off-by: Christian Borntraeger

s390: add SMT support

2015-01-22T11:16:01+00:00

The multi-threading facility is introduced with the z13 processor family. This patch adds code to detect the multi-threading facility. With the facility enabled each core will surface multiple hardware threads to the system. Each hardware threads looks like a normal CPU to the operating system with all its registers and properties. The SCLP interface reports the SMT topology indirectly via the maximum thread id. Each reported CPU in the result of a read-scp-information is a core representing a number of hardware threads. To reflect the reduced CPU capacity if two hardware threads run on a single core the MT utilization counter set is used to normalize the raw cputime obtained by the CPU timer deltas. This scaled cputime is reported via the taskstats interface. The normal /proc/stat numbers are based on the raw cputime and are not affected by the normalization. Signed-off-by: Martin Schwidefsky

s390/sclp: fix declaration of _sclp_print_early()

2015-01-08T09:02:51+00:00

_sclp_print_early() has return value: at present, return 0 for OK, 1 for failure. It returns '%r2', so use 'long' as return value (upper caller can check '%r2' directly). The related warning: CC arch/s390/boot/compressed/misc.o arch/s390/boot/compressed/misc.c:66:8: warning: type defaults to 'int' in declaration of '_sclp_print_early' [-Wimplicit-int] extern _sclp_print_early(const char *); ^ At present, _sclp_print_early() is only used by puts(), so can still remain its declaration in 'misc.c' file. [heiko.carstens@de.ibm.com]: move declaration to sclp.h header file Signed-off-by: Chen Gang Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/sclp: add sclp_get_ibc function

2014-05-16T12:57:30+00:00

The patch adds functionality to retrieve the IBC configuration by means of function sclp_get_ibc(). Signed-off-by: Michael Mueller Acked-by: Cornelia Huck Acked-by: Heiko Carstens Acked-by: Christian Borntraeger

KVM: s390/sclp: correctly set eca siif bit

2014-04-22T11:24:38+00:00

Check if siif is available before setting. Signed-off-by: Heiko Carstens Reviewed-by: Thomas Huth Signed-off-by: Christian Borntraeger