linux

iv/linux

History

Alexander Graf 0912e07d4f KVM: PPC: Book3S PR: Enable MSR_DR for switch_mmu_context()

commit ee8348496c77e3737d0a6cda307a521f2cff954f upstream.

Commit 863771a28e27 ("powerpc/32s: Convert switch_mmu_context() to C")
moved the switch_mmu_context() to C. While in principle a good idea, it
meant that the function now uses the stack. The stack is not accessible
from real mode though.

So to keep calling the function, let's turn on MSR_DR while we call it.
That way, all pointer references to the stack are handled virtually.

In addition, make sure to save/restore r12 on the stack, as it may get
clobbered by the C function.

Fixes: 863771a28e27 ("powerpc/32s: Convert switch_mmu_context() to C")
Cc: stable@vger.kernel.org # v5.14+
Reported-by: Matt Evans <matt@ozlabs.org>
Signed-off-by: Alexander Graf <graf@amazon.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220510123717.24508-1-graf@amazon.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2022-05-18 10:26:53 +02:00

boot

powerpc: dts: t104xrdb: fix phy type for FMAN 4/5

2022-04-13 20:59:02 +02:00

configs

Documentation, arch: Remove leftovers from CIFS_WEAK_PW_HASH

2022-01-27 11:05:21 +01:00

crypto

crypto: powepc/sha1 - remove unneeded semicolon

2021-03-07 15:13:14 +11:00

include

powerpc: Fix virt_addr_valid() for 64-bit Book3E & 32-bit