search for: vmap_stack

On Fri, Feb 17, 2017 at 11:42:45PM +0300, Jan Dakinevich wrote: > The buffer is used by virtio console driver as DMA buffer. Since v4.9 > (if VMAP_STACK is enabled) we shouldn't use the stack for DMA. You shouldn't use 'static' data either, that's not always guaranteed to be DMA-able, right? > > Signed-off-by: Jan Dakinevich <jan.dakinevich at gmail.com> > --- > drivers/tty/hvc/hvc_console.c | 7 ++++++- &gt...

On Fri, Feb 17, 2017 at 11:42:45PM +0300, Jan Dakinevich wrote: > The buffer is used by virtio console driver as DMA buffer. Since v4.9 > (if VMAP_STACK is enabled) we shouldn't use the stack for DMA. You shouldn't use 'static' data either, that's not always guaranteed to be DMA-able, right? > > Signed-off-by: Jan Dakinevich <jan.dakinevich at gmail.com> > --- > drivers/tty/hvc/hvc_console.c | 7 ++++++- &gt...

...er.algo; > + ctrl.u.sym_create_session.u.cipher.para.keylen = > cpu_to_le32(keylen); > + ctrl.u.sym_create_session.u.cipher.para.op = cpu_to_le32(op); > + > + sg_init_one(&outhdr, &ctrl, sizeof(ctrl)); I believe this won't work when the new virtually-mapped kernel stack (VMAP_STACK) is enabled. Regards, Salvatore

...g the v0.4 driver on master I observe a regression: commands are not received properly by QEMU (typically an attach command is received with a type of 0). After a bisection of the guest kernel the first commit the problem appears is: commit e3067861ba6650a566a6273738c23c956ad55c02 arm64: add basic VMAP_STACK support After reverting this patch, things resume working. I observe the problem with a 4kB page guest kernel. Thanks Eric > [5] git://linux-arm.org/kvmtool-jpb.git virtio-iommu/v0.4 > Warning: command-line has changed! Use --viommu vfio[,opts] and > --viommu virtio[,opts] to...

...observe a regression: commands > are not received properly by QEMU (typically an attach command is > received with a type of 0). After a bisection of the guest kernel the > first commit the problem appears is: > > commit e3067861ba6650a566a6273738c23c956ad55c02 > arm64: add basic VMAP_STACK support Indeed, thanks for the report. I can reproduce the problem with 4.14 and kvmtool. We should allocate buffers on the heap for any request (see for example 9472fe704 or e37e2ff35). I rebased onto 4.14 and pushed the following patch at: git://linux-arm.org/linux-jpb.git virtio-iommu/v0.4.1 I...

This patch introduces virtio-crypto driver for Linux Kernel. The virtio crypto device is a virtual cryptography device as well as a kind of virtual hardware accelerator for virtual machines. The encryption anddecryption requests are placed in the data queue and are ultimately handled by thebackend crypto accelerators. The second queue is the control queue used to create or destroy sessions for

This patch introduces virtio-crypto driver for Linux Kernel. The virtio crypto device is a virtual cryptography device as well as a kind of virtual hardware accelerator for virtual machines. The encryption anddecryption requests are placed in the data queue and are ultimately handled by thebackend crypto accelerators. The second queue is the control queue used to create or destroy sessions for

This is the continuation of my proposal for virtio-iommu, the para- virtualized IOMMU. Here is a summary of the changes since last time [1]: * The virtio-iommu document now resembles an actual specification. It is split into a formal description of the virtio device, and implementation notes. Please find sources and binaries at [2]. * Added a probe request to describe to the guest different

This is the continuation of my proposal for virtio-iommu, the para- virtualized IOMMU. Here is a summary of the changes since last time [1]: * The virtio-iommu document now resembles an actual specification. It is split into a formal description of the virtio device, and implementation notes. Please find sources and binaries at [2]. * Added a probe request to describe to the guest different