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| author | David S. Miller <davem@sunset.davemloft.net> | 2006-02-06 07:27:28 +0100 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-03-20 10:11:50 +0100 |
| commit | 45fec05f805a113372c9a7ff4c653ac749f6921c (patch) | |
| tree | 36fc99d10656775acb8e9442719447d64ac30a03 /arch/sparc64/mm | |
| parent | [SPARC64]: Kill all %pstate changes in context switch code. (diff) | |
| download | linux-45fec05f805a113372c9a7ff4c653ac749f6921c.tar.xz linux-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/mm')
| -rw-r--r-- | arch/sparc64/mm/ultra.S | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/arch/sparc64/mm/ultra.S b/arch/sparc64/mm/ultra.S index cac58d66fca9..5dd86ad0d29f 100644 --- a/arch/sparc64/mm/ultra.S +++ b/arch/sparc64/mm/ultra.S @@ -444,8 +444,15 @@ xcall_flush_tlb_kernel_range: /* 22 insns */ */ .globl xcall_sync_tick xcall_sync_tick: - rdpr %pstate, %g2 + +661: rdpr %pstate, %g2 wrpr %g2, PSTATE_IG | PSTATE_AG, %pstate + .section .gl_2insn_patch, "ax" + .word 661b + nop + nop + .previous + rdpr %pil, %g2 wrpr %g0, 15, %pil sethi %hi(109f), %g7 @@ -468,8 +475,15 @@ xcall_sync_tick: */ .globl xcall_report_regs xcall_report_regs: - rdpr %pstate, %g2 + +661: rdpr %pstate, %g2 wrpr %g2, PSTATE_IG | PSTATE_AG, %pstate + .section .gl_2insn_patch, "ax" + .word 661b + nop + nop + .previous + rdpr %pil, %g2 wrpr %g0, 15, %pil sethi %hi(109f), %g7 |