fix(cpus): drop esb from the Neoverse N1
An esb is only necessary when FEAT_IESB is not present in hardware but
FEAT_RAS is. When FEAT_RAS is present we rely on the fact that FEAT_IESB
will also be present and an implicit esb will pre present on eret.
Well the N1 implements FEAT_RAS and FEAT_IESB and the platforms that use
it (n1sdp) enable the features in firmware. So the esb is redundant.
There are dynamic platforms where this may not necessarily be true,
however, the esb is in an erratum workaround which cannot be present in
these platforms.
Change-Id: I5775180ec61373cc5d1b9831e3fa0f2fbb19eab9
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
(cherry picked from commit e75eea749a59ba67c3eb3dfba41bd8d6770cc708)
1 file changed