search for: powernv

An include goes away in future patches which breaks compilation without this. Signed-off-by: Nicholas Piggin <npiggin at gmail.com> --- arch/powerpc/platforms/powernv/pci-ioda-tce.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/platforms/powernv/pci-ioda-tce.c b/arch/powerpc/platforms/powernv/pci-ioda-tce.c index f923359d8afc..8eba6ece7808 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda-tce.c +++ b/arch/powerpc/platforms/powernv/pci-ioda-...

.... It take the cpu ^^ takes > as parameter and return true if the cpu is preempted. Then kernel can break > the spin loops upon on the retval of vcpu_is_preempted. >? > As kernel has used this interface, So lets support it. >? > Only pSeries need supoort it. And the fact is powerNV are built into same ???^^ support > kernel image with pSeries. So we need return false if we are runnig as > powerNV. The another fact is that lppaca->yiled_count keeps zero on ??^^ yield > powerNV. So we can just skip the machine type. >? > Suggested-by: Boqun Feng <boq...

.... It take the cpu ^^ takes > as parameter and return true if the cpu is preempted. Then kernel can break > the spin loops upon on the retval of vcpu_is_preempted. >? > As kernel has used this interface, So lets support it. >? > Only pSeries need supoort it. And the fact is powerNV are built into same ???^^ support > kernel image with pSeries. So we need return false if we are runnig as > powerNV. The another fact is that lppaca->yiled_count keeps zero on ??^^ yield > powerNV. So we can just skip the machine type. >? > Suggested-by: Boqun Feng <boq...

..._preempted(int cpu). It take the cpu > as parameter and return true if the cpu is preempted. Then kernel can break > the spin loops upon on the retval of vcpu_is_preempted. > > As kernel has used this interface, So lets support it. > > Only pSeries need supoort it. And the fact is powerNV are built into same > kernel image with pSeries. So we need return false if we are runnig as > powerNV. The another fact is that lppaca->yiled_count keeps zero on > powerNV. So we can just skip the machine type. Lock holder vCPU preemption can be detected by hardware pSeries or paravir...

..._preempted(int cpu). It take the cpu > as parameter and return true if the cpu is preempted. Then kernel can break > the spin loops upon on the retval of vcpu_is_preempted. > > As kernel has used this interface, So lets support it. > > Only pSeries need supoort it. And the fact is powerNV are built into same > kernel image with pSeries. So we need return false if we are runnig as > powerNV. The another fact is that lppaca->yiled_count keeps zero on > powerNV. So we can just skip the machine type. Lock holder vCPU preemption can be detected by hardware pSeries or paravir...

...an interface of bool vcpu_is_preempted(int cpu). It take the cpu as parameter and return true if the cpu is preempted. Then kernel can break the spin loops upon on the retval of vcpu_is_preempted. As kernel has used this interface, So lets support it. Only pSeries need supoort it. And the fact is powerNV are built into same kernel image with pSeries. So we need return false if we are runnig as powerNV. The another fact is that lppaca->yiled_count keeps zero on powerNV. So we can just skip the machine type. Suggested-by: Boqun Feng <boqun.feng at gmail.com> Suggested-by: Peter Zijlstra (In...

...an interface of bool vcpu_is_preempted(int cpu). It takes the cpu as parameter and return true if the cpu is preempted. Then kernel can break the spin loops upon the retval of vcpu_is_preempted(). As kernel has used this interface, So lets support it. Only pSeries need support it. And the fact is powerNV are built into same kernel image with pSeries. So we need return false if we are runnig as powerNV. The another fact is that lppaca->yield_count keeps zero on powerNV. So we can just skip the machine type check. Suggested-by: Boqun Feng <boqun.feng at gmail.com> Suggested-by: Peter Zijlst...

change fomr v1: a simplier definition of default vcpu_is_preempted skip mahcine type check on ppc, and add config. remove dedicated macro. add one patch to drop overload of rwsem_spin_on_owner and mutex_spin_on_owner. add more comments thanks boqun and Peter's suggestion. This patch set aims to fix lock holder preemption issues. test-case: perf record -a perf bench sched messaging -g

change fomr v1: a simplier definition of default vcpu_is_preempted skip mahcine type check on ppc, and add config. remove dedicated macro. add one patch to drop overload of rwsem_spin_on_owner and mutex_spin_on_owner. add more comments thanks boqun and Peter's suggestion. This patch set aims to fix lock holder preemption issues. test-case: perf record -a perf bench sched messaging -g

...take the cpu >> as parameter and return true if the cpu is preempted. Then kernel can break >> the spin loops upon on the retval of vcpu_is_preempted. >> >> As kernel has used this interface, So lets support it. >> >> Only pSeries need supoort it. And the fact is powerNV are built into same >> kernel image with pSeries. So we need return false if we are runnig as >> powerNV. The another fact is that lppaca->yiled_count keeps zero on >> powerNV. So we can just skip the machine type. > > Lock holder vCPU preemption can be detected by hardwa...

On Tue, 2018-08-07 at 23:31 -0700, Christoph Hellwig wrote: > > You don't need to set them the time you go secure. You just need to > set the flag from the beginning on any VM you might want to go secure. > Or for simplicity just any VM - if the DT/ACPI tables exposed by > qemu are good enough that will always exclude a iommu and not set a > DMA offset, so nothing will

On Tue, 2018-08-07 at 23:31 -0700, Christoph Hellwig wrote: > > You don't need to set them the time you go secure. You just need to > set the flag from the beginning on any VM you might want to go secure. > Or for simplicity just any VM - if the DT/ACPI tables exposed by > qemu are good enough that will always exclude a iommu and not set a > DMA offset, so nothing will

...power platforms: arch/powerpc/kernel/pci-common.c: set_dma_offset(&dev->dev, PCI_DRAM_OFFSET); arch/powerpc/platforms/cell/iommu.c: set_dma_offset(dev, cell_dma_nommu_offset); arch/powerpc/platforms/cell/iommu.c: set_dma_offset(dev, addr); arch/powerpc/platforms/powernv/pci-ioda.c: set_dma_offset(&pdev->dev, pe->tce_bypass_base); arch/powerpc/platforms/powernv/pci-ioda.c: set_dma_offset(&pdev->dev, (1ULL << 32)); arch/powerpc/platforms/powernv/pci-ioda.c: set_dma_offset(&dev->dev, pe->tce_bypa...

change from v2: no code change, fix typos, update some comments change from v1: a simplier definition of default vcpu_is_preempted skip mahcine type check on ppc, and add config. remove dedicated macro. add one patch to drop overload of rwsem_spin_on_owner and mutex_spin_on_owner. add more comments thanks boqun and Peter's suggestion. This patch set aims to fix lock holder preemption

change from v2: no code change, fix typos, update some comments change from v1: a simplier definition of default vcpu_is_preempted skip mahcine type check on ppc, and add config. remove dedicated macro. add one patch to drop overload of rwsem_spin_on_owner and mutex_spin_on_owner. add more comments thanks boqun and Peter's suggestion. This patch set aims to fix lock holder preemption

v3 is updated to use __pv_queued_spin_unlock, noticed by Waiman (thank you). Thanks, Nick Nicholas Piggin (6): powerpc/powernv: must include hvcall.h to get PAPR defines powerpc/pseries: move some PAPR paravirt functions to their own file powerpc: move spinlock implementation to simple_spinlock powerpc/64s: implement queued spinlocks and rwlocks powerpc/pseries: implement paravirt qspinlocks for SPLPAR powerpc/qs...

v3 is updated to use __pv_queued_spin_unlock, noticed by Waiman (thank you). Thanks, Nick Nicholas Piggin (6): powerpc/powernv: must include hvcall.h to get PAPR defines powerpc/pseries: move some PAPR paravirt functions to their own file powerpc: move spinlock implementation to simple_spinlock powerpc/64s: implement queued spinlocks and rwlocks powerpc/pseries: implement paravirt qspinlocks for SPLPAR powerpc/qs...

...i at vger.kernel.org Cc: linux-nvdimm at lists.01.org Cc: linux-hyperv at vger.kernel.org Cc: linux-s390 at vger.kernel.org Cc: virtualization at lists.linux-foundation.org Cc: xen-devel at lists.xenproject.org Signed-off-by: David Hildenbrand <david at redhat.com> --- arch/powerpc/platforms/powernv/memtrace.c | 2 +- arch/powerpc/platforms/pseries/hotplug-memory.c | 2 +- drivers/acpi/acpi_memhotplug.c | 2 +- drivers/base/memory.c | 2 +- drivers/dax/kmem.c | 2 +- drivers/hv/hv_balloon.c...

...r and return true if the cpu is preempted. Then kernel can >>> break >>> the spin loops upon on the retval of vcpu_is_preempted. >>> >>> As kernel has used this interface, So lets support it. >>> >>> Only pSeries need supoort it. And the fact is powerNV are built into same >>> kernel image with pSeries. So we need return false if we are runnig as >>> powerNV. The another fact is that lppaca->yiled_count keeps zero on >>> powerNV. So we can just skip the machine type. >> >> >> Lock holder vCPU preempt...

...r and return true if the cpu is preempted. Then kernel can >>> break >>> the spin loops upon on the retval of vcpu_is_preempted. >>> >>> As kernel has used this interface, So lets support it. >>> >>> Only pSeries need supoort it. And the fact is powerNV are built into same >>> kernel image with pSeries. So we need return false if we are runnig as >>> powerNV. The another fact is that lppaca->yiled_count keeps zero on >>> powerNV. So we can just skip the machine type. >> >> >> Lock holder vCPU preempt...