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Re: [Xen-devel] [PATCH 2/7] common: avoid atomic read-modify-write accesses in map_vcpu_info()



Hi,

On 11/03/2019 16:50, Andrew Cooper wrote:
On 11/03/2019 16:48, Jan Beulich wrote:
There's no need to set the evtchn_pending_sel bits one by one. Simply
write full words with all ones.

For Arm this requires extending write_atomic() to also handle 64-bit
values; for symmetry read_atomic() gets adjusted as well.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

(I'll leave the ARM assembly to Julien to check over)

Reviewed-by: Julien Grall <julien.grall@xxxxxxx>

I can queue this series in my next branch once it is fully acked.

Cheers,

--
Julien Grall

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