Tags

5.4.227-409

4.9.336-10

4.9.336-130

4.9.336-30

4.9.336-87

asahi-6.1-2

Tagging asahi-6.1-2

rocm-5.4.1

ROCm release v5.4.1

v6.0.13

This is the 6.0.13 stable release

v5.15.83

This is the 5.15.83 stable release

x86_core_for_v6.2

- Add the call depth tracking mitigation for Retbleed which has
been long in the making. It is a lighterweight software-only fix for
Skylake-based cores where enabling IBRS is a big hammer and causes a
significant performance impact.

What it basically does is, it aligns all kernel functions to 16 bytes
boundary and adds a 16-byte padding before the function, objtool
collects all functions' locations and when the mitigation gets applied,
it patches a call accounting thunk which is used to track the call depth
of the stack at any time.

When that call depth reaches a magical, microarchitecture-specific value
for the Return Stack Buffer, the code stuffs that RSB and avoids its
underflow which could otherwise lead to the Intel variant of Retbleed.

This software-only solution brings a lot of the lost performance back,
as benchmarks suggest:

  https://lore.kernel.org/all/20220915111039.092790446@infradead.org/

That page above also contains a lot more detailed explanation of the
whole mechanism

- Implement a new control flow integrity scheme called FineIBT which is
based on the software kCFI implementation and uses hardware IBT support
where present to annotate and track indirect branches using a hash to
validate them

- Other misc fixes and cleanups

v5.10.159

This is the 5.10.159 stable release

v5.4.227

This is the 5.4.227 stable release

v4.19.269

This is the 4.19.269 stable release

v4.14.302

This is the 4.14.302 stable release

v4.9.336

This is the 4.9.336 stable release

x86_sev_for_v6.2

- Two minor fixes to the sev-guest driver

x86_paravirt_for_v6.2

- Simplify paravirt patching machinery by removing the now unused
clobber mask

x86_microcode_for_v6.2

- Add support for multiple testing sequences to the Intel In-Field Scan
driver in order to be able to run multiple different test patterns.
Rework things and remove the BROKEN dependency so that the driver can be
enabled (Jithu Joseph)

- Remove the subsys interface usage in the microcode loader because it
is not really needed

- A couple of smaller fixes and cleanups

x86_cpu_for_v6.2

- Split MTRR and PAT init code to accomodate at least Xen PV and TDX
guests which do not get MTRRs exposed but only PAT. (TDX guests do not
support the cache disabling dance when setting up MTRRs so they fall
under the same category.) This is a cleanup work to remove all the ugly
workarounds for such guests and init things separately (Juergen Gross)

- Add two new Intel CPUs to the list of CPUs with "normal" Energy
Performance Bias, leading to power savings

- Do not do bus master arbitration in C3 (ARB_DISABLE) on modern Centaur
CPUs

x86_boot_for_v6.2

- Do some spring cleaning to the compressed boot code by moving the
EFI mixed-mode code to a separate compilation unit, the AMD memory
encryption early code where it belongs and fixing up build dependencies.
Make the deprecated EFI handover protocol optional with the goal of
removing it at some point (Ard Biesheuvel)

- Skip realmode init code on Xen PV guests as it is not needed there

- Remove an old 32-bit PIC code compiler workaround