On 6/14/2017 12:42 PM, Borislav Petkov wrote:
On Wed, Jun 07, 2017 at 02:17:45PM -0500, Tom Lendacky wrote:
The IOMMU is programmed with physical addresses for the various tables
and buffers that are used to communicate between the device and the
driver. When the driver allocates this memory it
Hi Catalin, all.
Thank you for your time on reviewing the series. I really appreciate it.
This is the updated version where I tried to address all comments:
https://github.com/norov/linux/commits/ilp32-20170613.4
(3 last patches here is the Andrew Pinski's rework of vdso rebased on
ilp32 series)
On 6/14/2017 11:50 AM, Borislav Petkov wrote:
On Wed, Jun 07, 2017 at 02:17:32PM -0500, Tom Lendacky wrote:
Add warnings to let the user know when bounce buffers are being used for
DMA when SME is active. Since the bounce buffers are not in encrypted
memory, these notifications are to allow the
On 6/14/2017 11:45 AM, Borislav Petkov wrote:
On Wed, Jun 07, 2017 at 02:17:21PM -0500, 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
On Wed, Jun 07, 2017 at 02:17:45PM -0500, Tom Lendacky wrote:
> The IOMMU is programmed with physical addresses for the various tables
> and buffers that are used to communicate between the device and the
> driver. When the driver allocates this memory it is encrypted. In order
> for the IOMMU to a
On Wed, Jun 14, 2017 at 12:06:54PM -0500, Tom Lendacky wrote:
> This isn't new... there are a number of messages issued in this file
> with that prefix, so I was just following convention.
The "convention" that some of the messages are prefixed and some aren't?
:-)
> Changing the prefix could b
When servicing mmap() reads from file holes the current DAX code allocates
a page cache page of all zeroes and places the struct page pointer in the
mapping->page_tree radix tree. This has two major drawbacks:
1) It consumes memory unnecessarily. For every 4k page that is read via a
DAX mmap() o
To be able to use the common 4k zero page in DAX we need to have our PTE
fault path look more like our PMD fault path where a PTE entry can be
marked as dirty and writeable as it is first inserted, rather than waiting
for a follow-up dax_pfn_mkwrite() => finish_mkwrite_fault() call.
Right now we c
When servicing mmap() reads from file holes the current DAX code allocates
a page cache page of all zeroes and places the struct page pointer in the
mapping->page_tree radix tree. This has two major drawbacks:
1) It consumes memory unnecessarily. For every 4k page that is read via a
DAX mmap() o
dax_load_hole() will soon need to call dax_insert_mapping_entry(), so it
needs to be moved lower in dax.c so the definition exists.
Signed-off-by: Ross Zwisler
---
fs/dax.c | 88
1 file changed, 44 insertions(+), 44 deletions(-)
d
On 6/14/2017 11:07 AM, Borislav Petkov wrote:
On Wed, Jun 07, 2017 at 02:16:43PM -0500, Tom Lendacky wrote:
The SMP MP-table is built by UEFI and placed in memory in a decrypted
state. These tables are accessed using a mix of early_memremap(),
early_memunmap(), phys_to_virt() and virt_to_phys().
On Wed, Jun 07, 2017 at 02:17:32PM -0500, Tom Lendacky wrote:
> Add warnings to let the user know when bounce buffers are being used for
> DMA when SME is active. Since the bounce buffers are not in encrypted
> memory, these notifications are to allow the user to determine some
> appropriate actio
On Wed, Jun 07, 2017 at 02:17:21PM -0500, 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 c
On Wed, Jun 14, 2017 at 06:24:16PM +0200, Borislav Petkov wrote:
> On Wed, Jun 07, 2017 at 02:17:09PM -0500, Tom Lendacky wrote:
> > When Secure Memory Encryption is enabled, the trampoline area must not
> > be encrypted. A CPU running in real mode will not be able to decrypt
> > memory that has be
On 6/14/2017 11:24 AM, Borislav Petkov wrote:
On Wed, Jun 07, 2017 at 02:17:09PM -0500, Tom Lendacky wrote:
When Secure Memory Encryption is enabled, the trampoline area must not
be encrypted. A CPU running in real mode will not be able to decrypt
memory that has been encrypted because it will n
On Wed, Jun 07, 2017 at 02:17:00PM -0500, Tom Lendacky wrote:
> Add support for changing the memory encryption attribute for one or more
> memory pages. This will be useful when we have to change the AP trampoline
> area to not be encrypted. Or when we need to change the SWIOTLB area to
> not be en
On Wed, Jun 07, 2017 at 02:17:09PM -0500, Tom Lendacky wrote:
> When Secure Memory Encryption is enabled, the trampoline area must not
> be encrypted. A CPU running in real mode will not be able to decrypt
> memory that has been encrypted because it will not be able to use addresses
> with the memo
On Wed, Jun 07, 2017 at 02:16:43PM -0500, Tom Lendacky wrote:
> The SMP MP-table is built by UEFI and placed in memory in a decrypted
> state. These tables are accessed using a mix of early_memremap(),
> early_memunmap(), phys_to_virt() and virt_to_phys(). Change all accesses
> to use early_memrema
Hi Linus,
On 14/06/17 03:59 AM, Linus Walleij wrote:
> I started to take a stab at it at one point and incorporated some feedback
> from Torvalds etc, it's here:
> https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git/commit/?h=chrdev-warn&id=65e5b1e9eb3f777ab7535b74b490e882eeec79d
> That would cut it, but TIOCPKT is too coupled with having a linked tty.
> I could make acm behave like a pty (accept TIOCPKT and issue the
> ctrl_status bits), but for that I need n_tty to know that packet does
> not always mean a linked tty is present, and that in case it isn't we
> take our own
On Tue, Jun 13, 2017 at 02:04:11PM +0300, Yury Norov wrote:
> On Thu, Jun 08, 2017 at 04:09:50PM +0100, Catalin Marinas wrote:
> > On Sun, Jun 04, 2017 at 02:59:51PM +0300, Yury Norov wrote:
> > > All new 32-bit architectures should have 64-bit off_t type, but existing
> > > architectures has 32-bi
Another place in lib/Kconfig.debug was already fixed in commit f8998c226587
("lib/Kconfig.debug: correct documentation paths").
Fixes: 9d85025b0418 ("docs-rst: create an user's manual book")
Signed-off-by: Steffen Maier
---
Documentation/admin-guide/kernel-parameters.txt | 6 --
1 file chang
On Tue, Jun 13, 2017 at 6:34 AM, Greg Kroah-Hartman
wrote:
> Ah, that makes sense. Well, someone can always work on expanding the
> range of dynamic char major numbers if they are running out of them on a
> real system, I'll gladly take patches for that :)
I started to take a stab at it at one
On Wed, Jun 14, 2017 at 11:20 AM, Tal Shorer wrote:
> On Wed, Jun 14, 2017 at 4:15 AM, Alan Cox wrote:
>> On Tue, 13 Jun 2017 09:52:07 +0300
>> Tal Shorer wrote:
>>
>>> If a tty driver wants to notify the user of some exceptional event,
>>> such as a usb cdc acm device set_line_coding event, it
On Wed, Jun 14, 2017 at 4:15 AM, Alan Cox wrote:
> On Tue, 13 Jun 2017 09:52:07 +0300
> Tal Shorer wrote:
>
>> If a tty driver wants to notify the user of some exceptional event,
>> such as a usb cdc acm device set_line_coding event, it needs a way to
>> modify the mask returned by poll() and pos
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