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| author | David S. Miller <davem@sunset.davemloft.net> | 2006-02-05 22:27:28 -0800 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-03-20 01:11:50 -0800 |
| commit | 45fec05f805a113372c9a7ff4c653ac749f6921c (patch) | |
| tree | 36fc99d10656775acb8e9442719447d64ac30a03 /arch/sparc64/kernel/ktlb.S | |
| parent | 314981ac7177a933319e3c071a5cf0a579205e6e (diff) | |
| download | lwn-45fec05f805a113372c9a7ff4c653ac749f6921c.tar.gz lwn-45fec05f805a113372c9a7ff4c653ac749f6921c.zip | |
[SPARC64]: Sanitize %pstate writes for sun4v.
If we're just switching between different alternate global
sets, nop it out on sun4v. Also, get rid of all of the
alternate global save/restore in the OBP CIF trampoline code.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/kernel/ktlb.S')
| -rw-r--r-- | arch/sparc64/kernel/ktlb.S | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/arch/sparc64/kernel/ktlb.S b/arch/sparc64/kernel/ktlb.S index 9b415ab6db6b..c1335432124e 100644 --- a/arch/sparc64/kernel/ktlb.S +++ b/arch/sparc64/kernel/ktlb.S @@ -60,8 +60,15 @@ kvmap_itlb_load: retry kvmap_itlb_longpath: - rdpr %pstate, %g5 + +661: rdpr %pstate, %g5 wrpr %g5, PSTATE_AG | PSTATE_MG, %pstate + .section .gl_2insn_patch, "ax" + .word 661b + nop + nop + .previous + rdpr %tpc, %g5 ba,pt %xcc, sparc64_realfault_common mov FAULT_CODE_ITLB, %g4 @@ -161,8 +168,15 @@ kvmap_check_obp: nop kvmap_dtlb_longpath: - rdpr %pstate, %g5 + +661: rdpr %pstate, %g5 wrpr %g5, PSTATE_AG | PSTATE_MG, %pstate + .section .gl_2insn_patch, "ax" + .word 661b + nop + nop + .previous + rdpr %tl, %g4 cmp %g4, 1 mov TLB_TAG_ACCESS, %g4 |