This adds standard documentation for the sysfs switchtec attributes and
a RST formatted text file which documents the char device interface.
Jonathan Corbet has indicated he will move this to a new user-space
developer documentation book once it's created.
Signed-off-by: Logan Gunthorpe
Changes since v4:
* Turns out pushing the pci release code into the device release
function didn't work as I would have liked. If you try to unbind the
device with an instance open, then you hit a kernel bug at
drivers/pci/msi.c:371. (This didn't occur in v3.)
To solve this, we've moved
Microsemi's "Switchtec" line of PCI switch devices is already well
supported by the kernel with standard PCI switch drivers. However, the
Switchtec device advertises a special management endpoint with a separate
PCI function address and class code. This endpoint enables some additional
This patch introduces a couple of special IOCTLs which are provided to:
* Inform userspace of firmware partition locations
* Pass event counts and allow userspace to wait on events
* Translate between PFF numbers used by the switch to
port numbers.
Signed-off-by: Logan Gunthorpe
On Thu, Feb 16, 2017 at 09:46:04AM -0600, Tom Lendacky wrote:
> Since DMA addresses will effectively look like 48-bit addresses when the
> memory encryption mask is set, SWIOTLB is needed if the DMA mask of the
> device performing the DMA does not support 48-bits. SWIOTLB will be
> initialized to
On Thu, Feb 16, 2017 at 09:43:07AM -0600, Tom Lendacky wrote:
> Add support for Secure Memory Encryption (SME). This initial support
> provides a Kconfig entry to build the SME support into the kernel and
> defines the memory encryption mask that will be used in subsequent
> patches to mark pages
