a8282bf087
Seven fixes, all for bugs introduced this cycle.
The commit to add KASAN support broke booting on 32-bit SMP machines, due to a
refactoring that moved some setup out of the secondary CPU path.
A fix for another 32-bit SMP bug introduced by the fast syscall entry
implementation for 32-bit BOOKE. And a build fix for the same commit.
Our change to allow the DAWR to be force enabled on Power9 introduced a bug in
KVM, where we clobber r3 leading to a host crash.
The same commit also exposed a previously unreachable bug in the nested KVM
handling of DAWR, which could lead to an oops in a nested host.
One of the DMA reworks broke the b43legacy WiFi driver on some people's
powermacs, fix it by enabling a 30-bit ZONE_DMA on 32-bit.
A fix for TLB flushing in KVM introduced a new bug, as it neglected to also
flush the ERAT, this could lead to memory corruption in the guest.
Thanks to:
Aaro Koskinen, Christoph Hellwig, Christophe Leroy, Larry Finger, Michael
Neuling, Suraj Jitindar Singh.
-----BEGIN PGP SIGNATURE-----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=Ju1y
-----END PGP SIGNATURE-----
Merge tag 'powerpc-5.2-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"This is a frustratingly large batch at rc5. Some of these were sent
earlier but were missed by me due to being distracted by other things,
and some took a while to track down due to needing manual bisection on
old hardware. But still we clearly need to improve our testing of KVM,
and of 32-bit, so that we catch these earlier.
Summary: seven fixes, all for bugs introduced this cycle.
- The commit to add KASAN support broke booting on 32-bit SMP
machines, due to a refactoring that moved some setup out of the
secondary CPU path.
- A fix for another 32-bit SMP bug introduced by the fast syscall
entry implementation for 32-bit BOOKE. And a build fix for the same
commit.
- Our change to allow the DAWR to be force enabled on Power9
introduced a bug in KVM, where we clobber r3 leading to a host
crash.
- The same commit also exposed a previously unreachable bug in the
nested KVM handling of DAWR, which could lead to an oops in a
nested host.
- One of the DMA reworks broke the b43legacy WiFi driver on some
people's powermacs, fix it by enabling a 30-bit ZONE_DMA on 32-bit.
- A fix for TLB flushing in KVM introduced a new bug, as it neglected
to also flush the ERAT, this could lead to memory corruption in the
guest.
Thanks to: Aaro Koskinen, Christoph Hellwig, Christophe Leroy, Larry
Finger, Michael Neuling, Suraj Jitindar Singh"
* tag 'powerpc-5.2-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
KVM: PPC: Book3S HV: Invalidate ERAT when flushing guest TLB entries
powerpc: enable a 30-bit ZONE_DMA for 32-bit pmac
KVM: PPC: Book3S HV: Only write DAWR[X] when handling h_set_dawr in real mode
KVM: PPC: Book3S HV: Fix r3 corruption in h_set_dabr()
powerpc/32: fix build failure on book3e with KVM
powerpc/booke: fix fast syscall entry on SMP
powerpc/32s: fix initial setup of segment registers on secondary CPU
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.