Re: [PATCH v15 04/12] x86/smpboot: Reference count on smpboot_setup_warm_reset_vector()

[Borislav Petkov]

On Thu, Mar 16, 2023 at 10:21:01PM +0000, Usama Arif wrote:
> From: David Woodhouse <dwmw@xxxxxxxxxxxx>
> 
> When bringing up a secondary CPU from do_boot_cpu(), the warm reset flag
> is set in CMOS and the starting IP for the trampoline written inside the
> BDA at 0x467. Once the CPU is running, the CMOS flag is unset and the
> value in the BDA cleared.
> 
> To allow for parallel bringup of CPUs, add a reference count to track the
> number of CPUs currently bring brought up, and clear the state only when

s/bring //

> the count reaches zero.

-- 
Regards/Gruss,
    Boris.

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