wireguard-linux/arch/powerpc/kernel/dawr.c, branch jd/unified-crypt-queueWireGuard for the Linux kernelhttps://git.zx2c4.com/wireguard-linux/atom/arch/powerpc/kernel/dawr.c?h=jd%2Funified-crypt-queue2019-11-13T05:58:03Zpowerpc/watchpoint: Fix length calculation for unaligned target2019-11-13T05:58:03ZRavi Bangoriaravi.bangoria@linux.ibm.com2019-10-17T09:31:59Zurn:sha1:b57aeab811db07295f646808b1b17c312d17f57d
Watchpoint match range is always doubleword(8 bytes) aligned on
powerpc. If the given range is crossing doubleword boundary, we need
to increase the length such that next doubleword also get
covered. Ex,
address len = 6 bytes
|=========.
|------------v--|------v--------|
| | | | | | | | | | | | | | | | |
|---------------|---------------|
<---8 bytes--->
In such case, current code configures hw as:
start_addr = address & ~HW_BREAKPOINT_ALIGN
len = 8 bytes
And thus read/write in last 4 bytes of the given range is ignored.
Fix this by including next doubleword in the length.
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191017093204.7511-3-ravi.bangoria@linux.ibm.com
powerpc: Fix compile issue with force DAWR2019-07-03T05:19:35ZMichael Neulingmikey@neuling.org2019-06-04T03:00:37Zurn:sha1:a278e7ea608bea5fe6df9b6ae91fa134655c5d2c
If you compile with KVM but without CONFIG_HAVE_HW_BREAKPOINT you fail
at linking with:
arch/powerpc/kvm/book3s_hv_rmhandlers.o:(.text+0x708): undefined reference to `dawr_force_enable'
This was caused by commit c1fe190c0672 ("powerpc: Add force enable of
DAWR on P9 option").
This moves a bunch of code around to fix this. It moves a lot of the
DAWR code in a new file and creates a new CONFIG_PPC_DAWR to enable
compiling it.
Fixes: c1fe190c0672 ("powerpc: Add force enable of DAWR on P9 option")
Signed-off-by: Michael Neuling <mikey@neuling.org>
[mpe: Minor formatting in set_dawr()]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>