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On AIM systems without a software-managed SLB, such as POWER9 systems using

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either hardware segment tables or radix-tree-based page tables, do not try
to install SLB entries at trap boundaries.
This commit is contained in:
Nathan Whitehorn 2018-01-19 22:19:50 +00:00
parent ad6b97e7ca
commit 7790e46cf0
1 changed files with 9 additions and 0 deletions
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9
sys/powerpc/aim/trap_subr64.S
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@ -58,6 +58,9 @@
restore_usersrs:
GET_CPUINFO(%r28)
ld %r28,PC_USERSLB(%r28)
cmpdi %r28, 0 /* If user SLB pointer NULL, exit */
beqlr
li %r29, 0 /* Set the counter to zero */
slbia
@ -83,6 +86,12 @@ restore_usersrs:
restore_kernsrs:
GET_CPUINFO(%r28)
addi %r28,%r28,PC_KERNSLB
ld %r29,16(%r28) /* One past USER_SLB_SLOT */
cmpdi %r28,0
beqlr /* If first kernel entry is invalid,
* SLBs not in use, so exit early */
/* Otherwise, set up SLBs */
li %r29, 0 /* Set the counter to zero */
slbia