AuxXxilium/linux_dsm_epyc7002
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f6780ce619
linux_dsm_epyc7002/arch/powerpc
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Ravi Bangoria f6780ce619 powerpc/watchpoint: Fix DAWR exception constraint 
Pedro Miraglia Franco de Carvalho noticed that on p8/p9, DAR value is
inconsistent with different type of load/store. Like for byte,word
etc. load/stores, DAR is set to the address of the first byte of
overlap between watch range and real access. But for quadword load/
store it's sometime set to the address of the first byte of real
access whereas sometime set to the address of the first byte of
overlap. This issue has been fixed in p10. In p10(ISA 3.1), DAR is
always set to the address of the first byte of overlap. Commit 27985b2a64
("powerpc/watchpoint: Don't ignore extraneous exceptions blindly")
wrongly assumes that DAR is set to the address of the first byte of
overlap for all load/stores on p8/p9 as well. Fix that. With the fix,
we now rely on 'ea' provided by analyse_instr(). If analyse_instr()
fails, generate event unconditionally on p8/p9, and on p10 generate
event only if DAR is within a DAWR range.

Note: 8xx is not affected.

Fixes: 27985b2a64 ("powerpc/watchpoint: Don't ignore extraneous exceptions blindly")
Fixes: 74c6881019 ("powerpc/watchpoint: Prepare handler to handle more than one watchpoint")
Reported-by: Pedro Miraglia Franco de Carvalho <pedromfc@br.ibm.com>
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/20200723090813.303838-3-ravi.bangoria@linux.ibm.com
2020-07-26 23:34:18 +10:00
..
boot powerpc/boot/dts: Fix dtc "pciex" warnings 2020-06-30 14:38:00 +10:00
configs powerpc/64s/hash: Disable subpage_prot syscall by default 2020-07-22 00:01:25 +10:00
crypto powerpc: Replace HTTP links with HTTPS ones 2020-07-22 00:01:23 +10:00
include Merge branch 'scv' support into next 2020-07-23 17:43:44 +10:00
kernel powerpc/watchpoint: Fix DAWR exception constraint 2020-07-26 23:34:18 +10:00
kexec powerpc/book3s64/keys/kuap: Reset AMR/IAMR values on kexec 2020-07-20 22:57:59 +10:00
kvm KVM: PPC: Fix typo on H_DISABLE_AND_GET hcall 2020-07-23 17:43:35 +10:00
lib powerpc/sstep: Fix incorrect CONFIG symbol in scv handling 2020-07-24 23:16:49 +10:00
math-emu
mm powerpc/book3s64/pkey: Disable pkey on POWER6 and before 2020-07-26 23:34:18 +10:00
net powerpc/ppc-opcode: Consolidate powerpc instructions from bpf_jit.h 2020-07-16 13:12:42 +10:00
oprofile maccess: rename probe_user_{read,write} to copy_{from,to}_user_nofault 2020-06-17 10:57:41 -07:00
perf powerpc/perf: BHRB control to disable BHRB logic when not used 2020-07-22 21:56:42 +10:00
platforms Merge branch 'scv' support into next 2020-07-23 17:43:44 +10:00
purgatory
sysdev powerpc/xive: Ignore kmemleak false positives 2020-06-22 10:37:57 +10:00
tools
xmon Merge branch 'scv' support into next 2020-07-23 17:43:44 +10:00
Kbuild
Kconfig powerpc: Select ARCH_HAS_MEMBARRIER_SYNC_CORE 2020-07-23 17:43:23 +10:00
Kconfig.debug powerpc: Remove Xilinx PPC405/PPC440 support 2020-05-28 23:24:34 +10:00
Makefile powerpc/4xx: ppc4xx compile flag optimizations 2020-06-22 14:19:12 +10:00
Makefile.postlink