David Gibson ed120055c7 Implement PAPR VPA functions for pSeries shared processor partitions ... Shared-processor partitions are those where a CPU is time-sliced between partitions, rather than being permanently dedicated to a single partition. qemu emulated partitions, since they are just scheduled with the qemu user process, behave mostly like shared processor partitions. In order to better support shared processor partitions (splpar), PAPR defines the "VPA" (Virtual Processor Area), a shared memory communication channel between the hypervisor and partitions. There are also two additional shared memory communication areas for specialized purposes associated with the VPA. A VPA is not essential for operating an splpar, though it can be necessary for obtaining accurate performance measurements in the presence of runtime partition switching. Most importantly, however, the VPA is a prerequisite for PAPR's H_CEDE, hypercall, which allows a partition OS to give up it's shared processor timeslices to other partitions when idle. This patch implements the VPA and H_CEDE hypercalls in qemu. We don't implement any of the more advanced statistics which can be communicated through the VPA. However, this is enough to make normal pSeries kernels do an effective power-save idle on an emulated pSeries, significantly reducing the host load of a qemu emulated pSeries running an idle guest OS. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>		2011-04-01 18:34:57 +02:00
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cpu.h	Implement PAPR VPA functions for pSeries shared processor partitions	2011-04-01 18:34:57 +02:00
exec.h	inline cpu_halted into sole caller	2011-03-13 14:44:21 +00:00
helper_regs.h	Replace always_inline with inline	2009-08-16 09:06:54 +00:00
helper.c	Virtual hash page table handling on pSeries machine	2011-04-01 18:34:55 +02:00
helper.h	Correct ppc popcntb logic, implement popcntw and popcntd	2011-04-01 18:34:54 +02:00
kvm_ppc.c	change all other clock references to use nanosecond resolution accessors	2011-03-21 09:23:23 +01:00
kvm_ppc.h	Implement PAPR CRQ hypercalls	2011-04-01 18:34:56 +02:00
kvm.c	Parse SDR1 on mtspr instead of at translate time	2011-04-01 18:34:55 +02:00
machine.c	Parse SDR1 on mtspr instead of at translate time	2011-04-01 18:34:55 +02:00
mfrom_table_gen.c	find -type f | xargs sed -i 's/[\t ]*$//g' # Yes, again. Note the star in the regex.	2007-09-17 08:09:54 +00:00
mfrom_table.c	find -type f | xargs sed -i 's/[\t ]$//g' # on most files	2007-09-16 21:08:06 +00:00
op_helper.c	Correct ppc popcntb logic, implement popcntw and popcntd	2011-04-01 18:34:54 +02:00
STATUS	Update PowerPC emulation status file.	2007-10-25 21:38:16 +00:00
translate_init.c	Add POWER7 support for ppc	2011-04-01 18:34:55 +02:00
translate.c	Parse SDR1 on mtspr instead of at translate time	2011-04-01 18:34:55 +02:00