similar to: Got a strange IRQ

This API is the equivalent of alloc_pages, except that the returned memory is guaranteed to be DMA addressable by the passed in device. The implementation will also be used to provide a more sensible replacement for DMA_ATTR_NON_CONSISTENT flag. Additionally dma_alloc_noncoherent is switched over to use dma_alloc_pages as its backend. Signed-off-by: Christoph Hellwig <hch at lst.de> ---

I tried today''s unstable on some IBM hardware and get this IRQ message at boot when xenU tries to probe the virtual block device: Xen virtual console successfully installed as tty1 Event-channel device installed. xen_blk: Initialising virtual block device driver Trying to free free IRQ261 vbd: probe of

Add a new API to allocate and free pages that are guaranteed to be addressable by a device, but otherwise behave like pages allocated by alloc_pages. The intended APIs to sync them for use with the device and cpu are dma_sync_single_for_{device,cpu} that are also used for streaming mappings. Switch all drivers over to this new API, but keep the usage of the crufty dma_cache_sync API for now,

This patch adds a new feature called feature-split-event-channels for netfront, enabling it to handle TX and RX events separately. If netback does not support this feature, it falls back to use single event channel. Signed-off-by: Wei Liu <wei.liu2@citrix.com> Reviewed-by: David Vrabel <david.vrabel@citrix.com> --- drivers/net/xen-netfront.c | 173

Checking 'irq < 0' doesn't work when 'irq' is unsigned. The assigned bind_evtchn_to_irq() and bind_virq_to_irq() return int, so using int appears appropriate. Signed-off-by: Nicolas Kaiser <nikai at nikai.net> --- drivers/xen/events.c | 6 ++---- 1 files changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/xen/events.c b/drivers/xen/events.c index

Checking 'irq < 0' doesn't work when 'irq' is unsigned. The assigned bind_evtchn_to_irq() and bind_virq_to_irq() return int, so using int appears appropriate. Signed-off-by: Nicolas Kaiser <nikai at nikai.net> --- drivers/xen/events.c | 6 ++---- 1 files changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/xen/events.c b/drivers/xen/events.c index

Checking 'irq < 0' doesn't work when 'irq' is unsigned. The assigned bind_evtchn_to_irq() and bind_virq_to_irq() return int, so using int appears appropriate. Signed-off-by: Nicolas Kaiser <nikai at nikai.net> --- drivers/xen/events.c | 6 ++---- 1 files changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/xen/events.c b/drivers/xen/events.c index

Remove x86 dependency in drivers/xen/events.c for ia64/xen support introducing include/asm/xen/events.h. Introduce xen_irqs_disabled() to hide regs->flags Introduce xen_do_IRQ() to hide regs->orig_ax. make enum ipi_vector definition arch specific. ia64/xen needs four vectors. Add one rmb() because on ia64 xchg() isn't barrier. Signed-off-by: Isaku Yamahata <yamahata at

Remove x86 dependency in drivers/xen/events.c for ia64/xen support introducing include/asm/xen/events.h. Introduce xen_irqs_disabled() to hide regs->flags Introduce xen_do_IRQ() to hide regs->orig_ax. make enum ipi_vector definition arch specific. ia64/xen needs four vectors. Add one rmb() because on ia64 xchg() isn't barrier. Signed-off-by: Isaku Yamahata <yamahata at

Hi, I followed the instructions in tools/debugger/gdb/README to enable the xen debugging feature. But after that my system (a kernel module) works 10 times slower. Maybe the debugger slows down the running. What''s the right way to reverse and disable the debugger? I tried to disable the "Kernel hacking -> Compile the kernel with debug info [*]" option. But it does not help.

Since IRQ probing may touch all currently unused interrupts, we must prevent probing for those where it doesn''t make sense (to avoid triggering BUG()s or de-referencing NULL function pointers): - dynamic IRQs must never be probed - physical IRQs should only be probed when registered or identity-mapped I haven''t got feedback from the reporting party, yet, but as the change seems

Remove duplicated #include('s) in drivers/xen/evtchn.c Signed-off-by: Huang Weiyi <weiyi.huang at gmail.com> --- drivers/xen/evtchn.c | 1 - 1 files changed, 0 insertions(+), 1 deletions(-) diff --git a/drivers/xen/evtchn.c b/drivers/xen/evtchn.c index af03195..79bedba 100644 --- a/drivers/xen/evtchn.c +++ b/drivers/xen/evtchn.c @@ -38,7 +38,6 @@ #include <linux/string.h>

Remove duplicated #include('s) in drivers/xen/evtchn.c Signed-off-by: Huang Weiyi <weiyi.huang at gmail.com> --- drivers/xen/evtchn.c | 1 - 1 files changed, 0 insertions(+), 1 deletions(-) diff --git a/drivers/xen/evtchn.c b/drivers/xen/evtchn.c index af03195..79bedba 100644 --- a/drivers/xen/evtchn.c +++ b/drivers/xen/evtchn.c @@ -38,7 +38,6 @@ #include <linux/string.h>

Remove duplicated #include('s) in drivers/xen/evtchn.c Signed-off-by: Huang Weiyi <weiyi.huang at gmail.com> --- drivers/xen/evtchn.c | 1 - 1 files changed, 0 insertions(+), 1 deletions(-) diff --git a/drivers/xen/evtchn.c b/drivers/xen/evtchn.c index af03195..79bedba 100644 --- a/drivers/xen/evtchn.c +++ b/drivers/xen/evtchn.c @@ -38,7 +38,6 @@ #include <linux/string.h>

Implement the alloc_noncoherent method to provide memory that is neither coherent not contiguous. Signed-off-by: Christoph Hellwig <hch at lst.de> --- drivers/iommu/dma-iommu.c | 41 +++++++++++++++++++++++++++++++++++---- 1 file changed, 37 insertions(+), 4 deletions(-) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 00a5b49248e334..c12c1dc43d312e 100644 ---

Wei Liu <wei.liu at kernel.org> writes: > When Linux runs as the root partition, it will need to make hypercalls > which return data from the hypervisor. > > Allocate pages for storing results when Linux runs as the root > partition. > > Signed-off-by: Lillian Grassin-Drake <ligrassi at microsoft.com> > Co-Developed-by: Lillian Grassin-Drake <ligrassi at

From: Santosh Jodh <santosh.jodh at citrix.com> Add support for multi page ring for block devices. The number of pages is configurable for blkback via module parameter. blkback reports max-ring-page-order to blkfront via xenstore. blkfront reports its supported ring-page-order to blkback via xenstore. blkfront reports multi page ring references via ring-refNN in xenstore. The change allows

From: Santosh Jodh <santosh.jodh at citrix.com> Add support for multi page ring for block devices. The number of pages is configurable for blkback via module parameter. blkback reports max-ring-page-order to blkfront via xenstore. blkfront reports its supported ring-page-order to blkback via xenstore. blkfront reports multi page ring references via ring-refNN in xenstore. The change allows

From: Santosh Jodh <santosh.jodh at citrix.com> Add support for multi page ring for block devices. The number of pages is configurable for blkback via module parameter. blkback reports max-ring-page-order to blkfront via xenstore. blkfront reports its supported ring-page-order to blkback via xenstore. blkfront reports multi page ring references via ring-refNN in xenstore. The change allows

Add some basic stand alone self tests for migrating system memory to device private memory and back. Signed-off-by: Ralph Campbell <rcampbell at nvidia.com> --- lib/test_hmm.c | 323 ++++++++++++++++++++----- tools/testing/selftests/vm/hmm-tests.c | 292 ++++++++++++++++++++++ 2 files changed, 560 insertions(+), 55 deletions(-) diff --git a/lib/test_hmm.c