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841b51e4a3
This fires on a Fam16h machine here:
unchecked MSR access error: WRMSR to 0xc000010f (tried to write 0x0000000000000018) \
at rIP: 0xffffffff81007db1 (amd_brs_reset+0x11/0x50)
Call Trace:
<TASK>
amd_pmu_cpu_starting
? x86_pmu_dead_cpu
x86_pmu_starting_cpu
cpuhp_invoke_callback
? x86_pmu_starting_cpu
? x86_pmu_dead_cpu
cpuhp_issue_call
? x86_pmu_starting_cpu
__cpuhp_setup_state_cpuslocked
? x86_pmu_dead_cpu
? x86_pmu_starting_cpu
__cpuhp_setup_state
? map_vsyscall
init_hw_perf_events
? map_vsyscall
do_one_initcall
? _raw_spin_unlock_irqrestore
? try_to_wake_up
kernel_init_freeable
? rest_init
kernel_init
ret_from_fork
because that CPU hotplug callback gets executed on any AMD CPU - not
only on the BRS-enabled ones. Check the BRS feature bit properly.
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-By: Stephane Eranian <eranian@google.com>
Link: https://lkml.kernel.org/r/20220516154838.7044-1-bp@alien8.de
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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.