From: Tom Lendacky
The GHCB specification defines how NMIs are to be handled for an SEV-ES
guest. To detect the completion of an NMI the hypervisor must not
intercept the IRET instruction (because a #VC while running the NMI will
issue an IRET) and, instead, must receive an NMI Complete exit
From: Tom Lendacky
SEV and SEV-ES guests each have dedicated ASID ranges. Update the ASID
allocation routine to return an ASID in the respective range.
Signed-off-by: Tom Lendacky
---
arch/x86/kvm/svm/sev.c | 25 ++---
1 file changed, 14 insertions(+), 11 deletions(-)
From: Tom Lendacky
An SEV-ES guest is started by invoking a new SEV initialization ioctl,
KVM_SEV_ES_INIT. This identifies the guest as an SEV-ES guest, which is
used to drive the appropriate ASID allocation, VMSA encryption, etc.
Before being able to run an SEV-ES vCPU, the vCPU VMSA must be
On 11/17, Daeho Jeong wrote:
> From: Daeho Jeong
>
> We will add a new disable_auto_compr mount option to turn off the
> automaic compression on the compression enabled file, in order to
> give discretion of choosing the target file and the timing of
> compression to the user.
The aim would be
From: Tom Lendacky
SEV-ES guests do not currently support SMM. Update the has_emulated_msr()
kvm_x86_ops function to take a struct kvm parameter so that the capability
can be reported at a VM level.
Since this op is also called during KVM initialization and before a struct
kvm instance is
From: Tom Lendacky
Add trace events for entry to and exit from VMGEXIT MSR protocol
processing. The vCPU will be common for the trace events. The MSR
protocol processing is guided by the GHCB GPA in the VMCB, so the GHCB
GPA will represent the input and output values for the entry and exit
From: Tom Lendacky
For SEV-ES guests, the interception of EFER write access is not
recommended. EFER interception occurs prior to EFER being modified and
the hypervisor is unable to modify EFER itself because the register is
located in the encrypted register state.
SEV-ES support introduces a
From: Tom Lendacky
Since many of the registers used by the SEV-ES are encrypted and cannot
be read or written, adjust the __get_sregs() / __set_sregs() to take into
account whether the VMSA/guest state is encrypted.
For __get_sregs(), return the actual value that is in use by the guest
for all
From: Tom Lendacky
SEV-ES adds a new VMEXIT reason code, VMGEXIT. Initial support for a
VMGEXIT includes mapping the GHCB based on the guest GPA, which is
obtained from a new VMCB field, and then validating the required inputs
for the VMGEXIT exit reason.
Since many of the VMGEXIT exit reasons
From: Tom Lendacky
For SEV-ES guests, the interception of control register write access
is not recommended. Control register interception occurs prior to the
control register being modified and the hypervisor is unable to modify
the control register itself because the register is located in the
From: Tom Lendacky
For an SEV-ES guest, MMIO is performed to a shared (un-encrypted) page
so that both the hypervisor and guest can read or write to it and each
see the contents.
The GHCB specification provides software-defined VMGEXIT exit codes to
indicate a request for an MMIO read or an
From: Tom Lendacky
For SEV-ES guests, the interception of control register write access
is not recommended. Control register interception occurs prior to the
control register being modified and the hypervisor is unable to modify
the control register itself because the register is located in the
From: Tom Lendacky
The GHCB specification defines a GHCB MSR protocol using the lower
12-bits of the GHCB MSR (in the hypervisor this corresponds to the
GHCB GPA field in the VMCB).
Function 0x004 is a request for CPUID information. Only a single CPUID
result register can be sent per
From: Tom Lendacky
For SEV-ES guests, the interception of control register write access
is not recommended. Control register interception occurs prior to the
control register being modified and the hypervisor is unable to modify
the control register itself because the register is located in the
From: Tom Lendacky
The GHCB specification defines a GHCB MSR protocol using the lower
12-bits of the GHCB MSR (in the hypervisor this corresponds to the
GHCB GPA field in the VMCB).
Function 0x100 is a request for termination of the guest. The guest has
encountered some situation for which it
From: Tom Lendacky
Typically under KVM, an AP is booted using the INIT-SIPI-SIPI sequence,
where the guest vCPU register state is updated and then the vCPU is VMRUN
to begin execution of the AP. For an SEV-ES guest, this won't work because
the guest register state is encrypted.
Following the
From: Tom Lendacky
When a SHUTDOWN VMEXIT is encountered, normally the VMCB is re-initialized
so that the guest can be re-launched. But when a guest is running as an
SEV-ES guest, the VMSA cannot be re-initialized because it has been
encrypted. For now, just return -EINVAL to prevent a possible
From: Tom Lendacky
Add trace events for entry to and exit from VMGEXIT processing. The vCPU
id and the exit reason will be common for the trace events. The exit info
fields will represent the input and output values for the entry and exit
events, respectively.
Signed-off-by: Tom Lendacky
---
From: Tom Lendacky
This is a pre-patch to consolidate some exit handling code into callable
functions. Follow-on patches for SEV-ES exit handling will then be able
to use them from the sev.c file.
Signed-off-by: Tom Lendacky
---
arch/x86/kvm/svm/svm.c | 64
From: Tom Lendacky
The GHCB specification defines a GHCB MSR protocol using the lower
12-bits of the GHCB MSR (in the hypervisor this corresponds to the
GHCB GPA field in the VMCB).
Function 0x002 is a request to set the GHCB MSR value to the SEV INFO as
per the specification via the VMCB GHCB
From: Tom Lendacky
For an SEV-ES guest, string-based port IO is performed to a shared
(un-encrypted) page so that both the hypervisor and guest can read or
write to it and each see the contents.
For string-based port IO operations, invoke SEV-ES specific routines that
can complete the operation
From: Tom Lendacky
The guest FPU state is automatically restored on VMRUN and saved on VMEXIT
by the hardware, so there is no reason to do this in KVM. Eliminate the
allocation of the guest_fpu save area and key off that to skip operations
related to the guest FPU state.
Signed-off-by: Tom
From: Tom Lendacky
When a guest is running under SEV-ES, the hypervisor cannot access the
guest register state. There are numerous places in the KVM code where
certain registers are accessed that are not allowed to be accessed (e.g.
RIP, CR0, etc). Add checks to prevent register accesses and add
From: Tom Lendacky
When performing VMGEXIT processing for an SEV-ES guest, register values
will be synced between KVM and the GHCB. Prepare for detecting when a GPR
has been updated (marked dirty) in order to determine whether to sync the
register to the GHCB.
Signed-off-by: Tom Lendacky
---
On Tue, Nov 17, 2020 at 09:19:01AM +0100, Alexandre Chartre wrote:
> We are not reversing PTI, we are extending it.
You're reversing it in the sense that you're mapping more kernel memory
into the user page table than what is mapped now.
> PTI removes all kernel mapping from the user page-table.
On Mon, Nov 16, 2020 at 5:59 PM Rafael J. Wysocki wrote:
>
> On Mon, Nov 16, 2020 at 5:51 PM Andy Shevchenko
> wrote:
> >
> > On Tue, Nov 03, 2020 at 10:45:03PM +0200, Andy Shevchenko wrote:
> > > Some users may want to use resource library to manage their own resources,
> > > besides existing
From: Tom Lendacky
Since the guest register state of an SEV-ES guest is encrypted, debugging
is not supported. Update the code to prevent guest debugging when the
guest has protected state.
Additionally, an SEV-ES guest must only and always intercept DR7 reads and
writes. Update
From: Tom Lendacky
Allocate a page during vCPU creation to be used as the encrypted VM save
area (VMSA) for the SEV-ES guest. Provide a flag in the kvm_vcpu_arch
structure that indicates whether the guest state is protected.
When freeing a VMSA page that has been encrypted, the cache contents
From: Tom Lendacky
When a guest is running as an SEV-ES guest, it is not possible to emulate
instructions. Add support to prevent instruction emulation.
Signed-off-by: Tom Lendacky
---
arch/x86/kvm/svm/svm.c | 6 ++
1 file changed, 6 insertions(+)
diff --git a/arch/x86/kvm/svm/svm.c
From: Tom Lendacky
Update the GHCB accessor functions to add functions for retrieve GHCB
fields by name. Update existing code to use the new accessor functions.
Signed-off-by: Tom Lendacky
---
arch/x86/include/asm/svm.h | 10 ++
arch/x86/kernel/cpu/vmware.c | 12 ++--
2
From: Tom Lendacky
Add support to KVM for determining if a system is capable of supporting
SEV-ES as well as determining if a guest is an SEV-ES guest.
Signed-off-by: Tom Lendacky
---
arch/x86/kvm/Kconfig | 3 ++-
arch/x86/kvm/svm/sev.c | 47 ++
From: Tom Lendacky
On systems that do not have hardware enforced cache coherency between
encrypted and unencrypted mappings of the same physical page, the
hypervisor can use the VM page flush MSR (0xc001011e) to flush the cache
contents of an SEV guest page. When a small number of pages are
From: Tom Lendacky
This patch series provides support for running SEV-ES guests under KVM.
Secure Encrypted Virtualization - Encrypted State (SEV-ES) expands on the
SEV support to protect the guest register state from the hypervisor. See
"AMD64 Architecture Programmer's Manual Volume 2: System
Hi, ChenYu,
I have tried to build and run linux-next by tag "next-20201117".
Now the boot log looks different but the kernel still hangs. See
https://pastebin.com/gFk7XuBc
Thank you,
Sergey
On 17.11.2020 11:06, Chen-Yu Tsai wrote:
Hi,
Please try linux-next. There were some
From: Tom Lendacky
When both KVM support and the CCP driver are built into the kernel instead
of as modules, KVM initialization can happen before CCP initialization. As
a result, sev_platform_status() will return a failure when it is called
from sev_hardware_setup(), when this isn't really an
On 11/17, Theodore Y. Ts'o wrote:
> On Tue, Nov 17, 2020 at 04:03:14AM +, Daniel Rosenberg wrote:
> > This shifts the responsibility of setting up dentry operations from
> > fscrypt to the individual filesystems, allowing them to have their own
> > operations while still setting fscrypt's
On 11/16, Martin K. Petersen wrote:
>
> Hi Jaegeuk!
>
> > From: Leo Liou
> >
> > We have lba and length for unmap commands.
> >
> > Signed-off-by: Leo Liou
>
> Doesn't apply to 5.11/scsi-queue.
>
> Also needs a Signed-off-by: tag from you.
Hi Martin,
Could you please consider this patch
On 11/17/20 4:52 PM, Andy Lutomirski wrote:
On Tue, Nov 17, 2020 at 7:07 AM Alexandre Chartre
wrote:
On 11/16/20 7:34 PM, Andy Lutomirski wrote:
On Mon, Nov 16, 2020 at 10:10 AM Alexandre Chartre
wrote:
On 11/16/20 5:57 PM, Andy Lutomirski wrote:
On Mon, Nov 16, 2020 at 6:47 AM
On Tue, Nov 17, 2020 at 12:32 PM Viresh Kumar wrote:
>
> local_clock() has better precision and accuracy as compared to jiffies,
> lets use it for time management in cpufreq stats.
>
> Signed-off-by: Viresh Kumar
> ---
> V2:
> - Doesn't change the units to msec and use local_clock() instead of
>
On Thu, Nov 5, 2020 at 11:16 PM Viresh Kumar wrote:
>
> On 05-11-20, 11:24, Rob Clark wrote:
> > On Tue, Nov 3, 2020 at 7:04 PM Viresh Kumar wrote:
> > >
> > > On 03-11-20, 08:50, Rob Clark wrote:
> > > > sorry, it didn't apply cleanly (which I guess is due to some other
> > > > dependencies
From: Jaegeuk Kim
Must have WQ_MEM_RECLAIM
``WQ_MEM_RECLAIM``
All wq which might be used in the memory reclaim paths **MUST**
have this flag set. The wq is guaranteed to have at least one
execution context regardless of memory pressure.
Signed-off-by: Jaegeuk Kim
Reviewed-by: Asutosh
Once UFS was gated with CLKS_OFF, it should not call REQ_CLKS_OFF again, which
caused hibern8_enter failure.
Signed-off-by: Jaegeuk Kim
---
drivers/scsi/ufs/ufshcd.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index
.snip..
> > > > Lets break this down:
> > > >
> > > > How does the performance improve for one single device if you increase
> > > > the SWIOTLB?
> > > > Is there a specific device/driver that you can talk about that improve
> > > > with this patch?
> > > >
> > > >
> > >
> > > Yes, these are
From: Jaegeuk Kim
In order to conduct FFU or RPMB operations, UFS needs to clear UAC. This patch
clears it explicitly, so that we could get no failure given early execution.
Signed-off-by: Jaegeuk Kim
---
drivers/scsi/ufs/ufshcd.c | 70 +++
On Tue, Nov 17, 2020 at 5:38 PM Bjorn Helgaas wrote:
>
> [+to Rafael, author of the commit you mentioned,
> +cc Mika, Kai Heng, Lukas, linux-pm, linux-kernel]
>
> On Tue, Nov 17, 2020 at 04:56:09PM +0100, Heiner Kallweit wrote:
> > More than 10 yrs ago Runtime PM was disabled per default by
On Tue, Nov 17, 2020 at 05:44:05PM +0100, Arnaud POULIQUEN wrote:
>
>
> On 11/17/20 5:03 PM, Guennadi Liakhovetski wrote:
> > On Tue, Nov 17, 2020 at 12:42:30PM +0100, Arnaud POULIQUEN wrote:
> >
> > [snip]
> >
> >> diff --git a/drivers/rpmsg/rpmsg_ns.c b/drivers/rpmsg/rpmsg_ns.c
> >> index
From: Leo Liou
We have lba and length for unmap commands.
Signed-off-by: Leo Liou
Reviewed-by: Stanley Chu
Signed-off-by: Jaegeuk Kim
---
drivers/scsi/ufs/ufshcd.c | 5 +
1 file changed, 5 insertions(+)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index
Change log from v4:
- add more fixes
Change log from v3:
- use __ufshcd_release with a fix in __ufshcd_release
Change log from v2:
- use active_req-- instead of __ufshcd_release to avoid UFS timeout
Change log from v1:
- remove clkgating_enable check in __ufshcd_release
- use
From: Jaegeuk Kim
When giving a stress test which enables/disables clkgating, we hit device
timeout sometimes. This patch avoids subtle racy condition to address it.
Note that, this requires a patch to address the device stuck by REQ_CLKS_OFF in
__ufshcd_release().
The fix is "scsi: ufs: avoid
The below call stack prevents clk_gating at every IO completion.
We can remove the condition, ufshcd_any_tag_in_use(), since clkgating_work
will check it again.
ufshcd_complete_requests(struct ufs_hba *hba)
ufshcd_transfer_req_compl()
__ufshcd_transfer_req_compl()
From: Jaegeuk Kim
This adds user-friendly tracepoints with group id.
Signed-off-by: Jaegeuk Kim
Reviewed-by: Can Guo
---
drivers/scsi/ufs/ufshcd.c | 6 --
include/trace/events/ufs.h | 21 +
2 files changed, 21 insertions(+), 6 deletions(-)
diff --git
On Tue, Nov 17, 2020 at 08:47:08AM -0500, Thara Gopinath wrote:
> Qualcomm crypto engine supports hardware accelerated algorithms for
> encryption and authentication. Enable support for aes,des,3des encryption
> algorithms and sha1,sha256, hmac(sha1),hmac(sha256) authentication
> algorithms on
On Tue, Nov 17, 2020 at 08:56:23AM +0100, Alexandre Chartre wrote:
> The main goal of ASI is to provide KVM address space isolation to
> mitigate guest-to-host speculative attacks like L1TF or MDS.
Because the current L1TF and MDS mitigations are lacking or why?
> Current proposal of ASI is
On Wed, Nov 18, 2020 at 12:49:19AM +0800, Hui Su wrote:
> page->lru bit 0 can tell whether the page is
> avtive page or not.
> page->lru bit 1 can tell whether the page is
> file page or not.
>
> Signed-off-by: Hui Su
> ---
> include/linux/mmzone.h | 4 ++--
> 1 file changed, 2 insertions(+), 2
On Mon, Oct 26, 2020 at 06:05:18PM +0200, Topi Miettinen wrote:
> Writing a new value of 3 to /proc/sys/kernel/randomize_va_space
> enables full randomization of memory mappings created with mmap(NULL,
> ...). With 2, the base of the VMA used for such mappings is random,
> but the mappings are
Set DMA mask to 32-bit while allocating the MSI target address so that
the address is usable for both 32-bit and 64-bit MSI capable devices.
Throw a warning if it fails to set the mask to 32-bit to alert that
devices that are only 32-bit MSI capable may not work properly.
Signed-off-by: Vidya
On Tue, Nov 17, 2020 at 6:45 PM Andy Shevchenko
wrote:
> On Tue, Nov 17, 2020 at 5:45 PM Enrico Weigelt, metux IT consult
> wrote:
> >
> > The of_match_ptr(foo) macro evaluates to foo, only if
> > CONFIG_OF is set, otherwise to NULL. Same does ACPI_PTR with
> > CONFIG_ACPI. That's very helpful
page->lru bit 0 can tell whether the page is
avtive page or not.
page->lru bit 1 can tell whether the page is
file page or not.
Signed-off-by: Hui Su
---
include/linux/mmzone.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/linux/mmzone.h
On 11/17/20 8:00 AM, kernel test robot wrote:
on test machine: 4 threads Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz with 32G
memory
caused below changes (please refer to attached dmesg/kmsg for entire
log/backtrace):
If you fix the issue, kindly add following tag
Reported-by: kernel test robot
On 11/17/20 5:03 PM, Guennadi Liakhovetski wrote:
> On Tue, Nov 17, 2020 at 12:42:30PM +0100, Arnaud POULIQUEN wrote:
>
> [snip]
>
>> diff --git a/drivers/rpmsg/rpmsg_ns.c b/drivers/rpmsg/rpmsg_ns.c
>> index 5bda7cb44618..80c2cc23bada 100644
>> --- a/drivers/rpmsg/rpmsg_ns.c
>> +++
On Sun, 15 Nov 2020 20:21:38 +0100
Maximilian Luz wrote:
> Add trace points to the Surface Aggregator subsystem core. These trace
> points can be used to track packets, requests, and allocations. They are
> further intended for debugging and testing/validation, specifically in
> combination with
On Tue, Nov 17, 2020 at 03:16:20PM +0100, Stefano Garzarella wrote:
> On Tue, Nov 17, 2020 at 11:11:21AM +, Stefan Hajnoczi wrote:
> > On Fri, Nov 13, 2020 at 02:47:04PM +0100, Stefano Garzarella wrote:
> > > +static void vdpasim_blk_work(struct work_struct *work)
> > > +{
> > > + struct
On Wed, Nov 11, 2020 at 03:53:22PM +0100, David Hildenbrand wrote:
> Suggested-by: Michal Hocko
> Cc: Michael Ellerman
> Cc: Benjamin Herrenschmidt
> Cc: Paul Mackerras
> Cc: Rashmica Gupta
> Cc: Andrew Morton
> Cc: Mike Rapoport
> Cc: Michal Hocko
> Cc: Oscar Salvador
> Cc: Wei Yang
>
On Tue, Nov 17, 2020 at 5:45 PM Enrico Weigelt, metux IT consult
wrote:
>
> The of_match_ptr(foo) macro evaluates to foo, only if
> CONFIG_OF is set, otherwise to NULL. Same does ACPI_PTR with
> CONFIG_ACPI. That's very helpful for drivers that can be used
> with or without oftree / acpi.
>
>
On Tue, Nov 17, 2020 at 5:07 PM Lee Jones wrote:
> On Tue, 17 Nov 2020, Matthias Brugger wrote:
> > On 17/11/2020 13:37, Lee Jones wrote:
> > > On Tue, 17 Nov 2020, Matthias Brugger wrote:
> >
> > If you want to go the route for me rebasing my tree on top of for-mfd-next
> > then I'd like to have
On Tue, Nov 17, 2020 at 2:02 PM Dan Scally wrote:
>
> On 16/11/2020 16:16, Andy Shevchenko wrote:
> > On Mon, Nov 16, 2020 at 02:15:01PM +, Dan Scally wrote:
> >> On 16/11/2020 14:10, Laurent Pinchart wrote:
> >>> I thought we were looking for ACPI devices, not companion devices, in
> >>>
On 11/12, Chao Yu wrote:
> On 2020/11/12 13:40, Jaegeuk Kim wrote:
> > Light reported sometimes shinker gets nat_cnt < dirty_nat_cnt resulting in
> > wrong do_shinker work. Let's avoid to get stale data by using nat_tree_lock.
> >
> > Reported-by: Light Hsieh
> > Signed-off-by: Jaegeuk Kim
> >
-r005-20201117 (attached as .config)
compiler: arceb-elf-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget
https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
~/bin/make.cross
chmod +x ~/bin/make.cross
#
https://git.kernel.org/pub/scm/linux/kernel
From: Min Li
Remove write phase mode 5 second setup delay, not needed.
Signed-off-by: Min Li
---
drivers/ptp/ptp_clockmatrix.c | 22 --
drivers/ptp/ptp_clockmatrix.h | 1 -
2 files changed, 23 deletions(-)
diff --git a/drivers/ptp/ptp_clockmatrix.c
[+to Rafael, author of the commit you mentioned,
+cc Mika, Kai Heng, Lukas, linux-pm, linux-kernel]
On Tue, Nov 17, 2020 at 04:56:09PM +0100, Heiner Kallweit wrote:
> More than 10 yrs ago Runtime PM was disabled per default by bb910a7040
> ("PCI/PM Runtime: Make runtime PM of PCI devices inactive
Hi Eric,
On Tue, Nov 17, 2020 at 1:55 PM Auger Eric wrote:
>
> Hi Vikas,
>
> On 11/17/20 9:05 AM, Auger Eric wrote:
> > Hi Vikas,
> >
> > On 11/17/20 7:25 AM, Vikas Gupta wrote:
> >> Hi Eric,
> >>
> >> On Mon, Nov 16, 2020 at 6:44 PM Auger Eric wrote:
> >>>
> >>> Hi Vikas,
> >>>
> >>> On
On 11/13/20 2:03 PM, Matthew Wilcox wrote:
+==
+Sequence Number Operations
+==
+
+:Author: Shuah Khan
+:Copyright: |copy| 2020, The Linux Foundation
+:Copyright: |copy| 2020, Shuah Khan
+
+Sequence Number api provides interfaces for unsigned up
On 20-11-17 15:31:22, Jonathan Cameron wrote:
> On Tue, 10 Nov 2020 21:43:54 -0800
> Ben Widawsky wrote:
>
> > Create a function to handle sending a command, optionally with a
> > payload, to the memory device, polling on a result, and then optionally
> > copying out the payload. The algorithm
When enabling KCSAN for kernel/sched (remove KCSAN_SANITIZE := n from
kernel/sched/Makefile), with CONFIG_DEBUG_PREEMPT=y, we can observe
recursion due to:
check_access() [via instrumentation]
kcsan_setup_watchpoint()
reset_kcsan_skip()
I think this is a false positive due to the cycling through different
bd_mutex instances. I think my next big series aimed at 5.11 will
fix this as a side effect, so I plan to ignore this for now, but will
test the reproducer with the follow on work applied eventually.
On Tue, Nov 17, 2020 at
On Tue, Nov 17, 2020 at 4:32 PM Ionela Voinescu wrote:
>
> Hi Rafael,
>
> On Tuesday 17 Nov 2020 at 15:59:24 (+0100), Rafael J. Wysocki wrote:
> > On Thu, Nov 5, 2020 at 1:56 PM Ionela Voinescu
> > wrote:
> > >
> > > Hi guys,
> > >
> > > I found myself staring a bit too much at this driver in
From: Mike Rapoport
The underlying implementations of set_direct_map_invalid_noflush() and
set_direct_map_default_noflush() allow updating multiple contiguous pages
at once.
Add numpages parameter to set_direct_map_*_noflush() to expose this ability
with these APIs.
Signed-off-by: Mike
From: Mike Rapoport
It is unsafe to allow saving of secretmem areas to the hibernation snapshot
as they would be visible after the resume and this essentially will defeat
the purpose of secret memory mappings.
Prevent hibernation whenever there are active secret memory users.
Signed-off-by:
From: Mike Rapoport
Introduce "memfd_secret" system call with the ability to create memory
areas visible only in the context of the owning process and not mapped not
only to other processes but in the kernel page tables as well.
The user will create a file descriptor using the memfd_secret()
From: Mike Rapoport
Wire up memfd_secret system call on architectures that define
ARCH_HAS_SET_DIRECT_MAP, namely arm64, risc-v and x86.
Signed-off-by: Mike Rapoport
Acked-by: Palmer Dabbelt
Acked-by: Arnd Bergmann
---
arch/arm64/include/asm/unistd.h| 2 +-
On Mon, Nov 16 2020 at 6:00pm -0500,
Randy Dunlap wrote:
> On 11/15/20 11:30 PM, Christian Borntraeger wrote:
> >
> >
> > On 13.11.20 23:52, Randy Dunlap wrote:
> >> Building on arch/s390/ flags this as an error, so add the
> >> __noreturn attribute modifier to prevent the build error.
> >>
>
From: Mike Rapoport
The test verifies that file descriptor created with memfd_secret does
not allow read/write operations, that secret memory mappings respect
RLIMIT_MEMLOCK and that remote accesses with process_vm_read() and
ptrace() to the secret memory fail.
Signed-off-by: Mike Rapoport
---
On Tue, Nov 17, 2020 at 08:15:59AM -0800, Joe Perches wrote:
> On Tue, 2020-11-17 at 10:09 -0600, Gustavo A. R. Silva wrote:
> > In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple
> > warnings by explicitly adding multiple break statements instead of
> > letting the code fall
From: Mike Rapoport
It will be used by the upcoming secret memory implementation.
Signed-off-by: Mike Rapoport
---
mm/internal.h | 3 +++
mm/mmap.c | 5 ++---
2 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/mm/internal.h b/mm/internal.h
index c43ccdddb0f6..ae146a260b14
From: Mike Rapoport
Account memory consumed by secretmem to memcg. The accounting is updated
when the memory is actually allocated and freed.
Signed-off-by: Mike Rapoport
---
mm/filemap.c | 3 ++-
mm/secretmem.c | 36 +++-
2 files changed, 37 insertions(+),
From: Min Li
Fix non-zero phase_adj is lost after snap. Use ktime_sub
to do ktime_t subtraction.
Signed-off-by: Min Li
---
drivers/ptp/ptp_clockmatrix.c | 210 +-
drivers/ptp/ptp_clockmatrix.h | 5 +-
2 files changed, 190 insertions(+), 25
timens_on_fork() always return 0, and maybe not
need to judge the return value in copy_namespaces().
So make timens_on_fork() return nothing and do not
judge its return val in copy_namespaces().
Signed-off-by: Hui Su
---
include/linux/time_namespace.h | 6 +++---
kernel/nsproxy.c
From: Mike Rapoport
The definition of PMD_PAGE_ORDER denoting the number of base pages in the
second-level leaf page is already used by DAX and maybe handy in other
cases as well.
Several architectures already have definition of PMD_ORDER as the size of
second level page table, so to avoid
From: Mike Rapoport
Removing a PAGE_SIZE page from the direct map every time such page is
allocated for a secret memory mapping will cause severe fragmentation of
the direct map. This fragmentation can be reduced by using PMD-size pages
as a pool for small pages for secret memory mappings.
Add
From: Min Li
This patch series is aiming at submitting the latest bug fixes and code
improvements of PHC driver for Renesas CLOCKMATRIX timing card. The code
has been thouroughly tested in both customer labs and Renesas internal
lab using the latest linuxptp program on Xilinx ZCU102 platform.
From: Min Li
Add deprecated flag to indicate < v4.8.7.
Fix idtcm_enable_tod() call correct settime().
Signed-off-by: Min Li
---
drivers/ptp/ptp_clockmatrix.c | 69 ---
drivers/ptp/ptp_clockmatrix.h | 11 +++
2 files changed, 45 insertions(+), 35
From: Mike Rapoport
Hi,
This is an implementation of "secret" mappings backed by a file descriptor.
The file descriptor backing secret memory mappings is created using a
dedicated memfd_secret system call The desired protection mode for the
memory is configured using flags parameter of the
On Tue, Nov 17, 2020 at 7:08 PM Song Bao Hua (Barry Song)
wrote:
>
>
>
> > -Original Message-
> > From: Muchun Song [mailto:songmuc...@bytedance.com]
> > Sent: Tuesday, November 17, 2020 11:50 PM
> > To: Song Bao Hua (Barry Song)
> > Cc: cor...@lwn.net; mike.krav...@oracle.com;
On Mon, Nov 16, 2020 at 02:31:02PM -0800, Davidlohr Bueso wrote:
> On Mon, 16 Nov 2020, Johan Hovold wrote:
>
> >On Fri, Nov 13, 2020 at 08:27:25PM -0800, Davidlohr Bueso wrote:
> >> @@ -1883,21 +1724,17 @@ static void mos7720_release(struct usb_serial
> >> *serial)
> >>if
On Tue, 17 Nov 2020, Matthew Wilcox wrote:
> On Mon, Nov 16, 2020 at 02:34:34AM -0800, Hugh Dickins wrote:
> > Fix to [PATCH v4 15/16] mm/truncate,shmem: Handle truncates that split THPs.
> > One machine ran fine, swapping and building in ext4 on loop0 on huge tmpfs;
> > one machine got occasional
On Tue, Nov 17, 2020 at 10:03:29PM +1100, Michael Ellerman wrote:
> Nathan Chancellor writes:
> > Currently, '--orphan-handling=warn' is spread out across four different
> > architectures in their respective Makefiles, which makes it a little
> > unruly to deal with in case it needs to be
The __iio_device_attr_init() function initializes a device_attribute
object, but mostly it just does a lot of name creation logic.
We will want to re-use this logic for name-creation, so this change
re-purposes the __iio_device_attr_init() to be a __iio_attr_init() function
which just handles the
We only need a chardev if we need to support buffers and/or events.
With this change, a chardev will be created only if an IIO buffer is
attached OR an event_interface is configured.
Otherwise, no chardev will be created, and the IIO device will get
registered with the 'device_add()' call.
This change makes it so that the first buffer directory is named 'buffer0'
and moves the 'scan_elements' under it.
For backwards compatibility these folders are symlinked back to the
original folders.
Signed-off-by: Alexandru Ardelean
---
drivers/iio/industrialio-buffer.c | 38
When adding more than one IIO buffer per IIO device, we will need to create
a buffer & scan_elements directory for each buffer.
We also want to move the 'scan_elements' to be a sub-directory of the
'buffer' folder.
The format we want to reach is, for a iio:device0 folder, for 2 buffers
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