https://bugs.kde.org/show_bug.cgi?id=440403
Bug ID: 440403
Summary: Some Arm64 CPU feature is masked when valgrind is
running and can not run the memcheck
Product: valgrind
Version: unspecified
Platform: Other
OS: Other
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: jsew...@acm.org
Reporter: kevin.z...@linaro.org
Target Milestone: ---
Background:
We are running PMDK on Arm64 for persistent memory operation. Now we meet an
issue for running test suites. PMDK needs to check if Arm64 supports CPU
feature: DCPOP, to decide to execute which CPU flushing command.
But with the commit: https://bugs.kde.org/show_bug.cgi?id=381556, the CPU
features have been masked, so we can not detect the real CPU features such as
DCPOP. That will induce that we can not use cpu flushing cmd: "dc cvap" to
flushing the CPU, which break the persistent memory working flow.
Is there any potential fix for this? Since Permsist memory is more and more
important now, and memcheck for persist memory will be an important user
scenario for valgrind.
ENV:
Arm v8.2 Qemu Guest:
processor : 7
BogoMIPS : 200.00
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp
asimdhp cpuid asimdrdm jscvt fcma dcpop asimddp asimdfhm
CPU implementer : 0x48
CPU architecture: 8
CPU variant : 0x1
CPU part : 0xd01
CPU revision : 0
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