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| author | David S. Miller <davem@sunset.davemloft.net> | 2006-02-09 02:52:44 -0800 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-03-20 01:12:03 -0800 |
| commit | d82ace7dc4073b090a55b9740700e32b9a9ae302 (patch) | |
| tree | d5aa8e10664b05bbfe31eacf95e2066c03cab102 /arch/sparc64/kernel/us3_cpufreq.c | |
| parent | 1d2f1f90a1e004b0c1b8a73ed4394a93f09104b3 (diff) | |
| download | blackbird-op-linux-d82ace7dc4073b090a55b9740700e32b9a9ae302.tar.gz blackbird-op-linux-d82ace7dc4073b090a55b9740700e32b9a9ae302.zip | |
[SPARC64]: Detect sun4v early in boot process.
We look for "SUNW,sun4v" in the 'compatible' property
of the root OBP device tree node.
Protect every %ver register access, to make sure it is
not touched on sun4v, as %ver is hyperprivileged there.
Lock kernel TLB entries using hypervisor calls instead of
calls into OBP.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/kernel/us3_cpufreq.c')
| -rw-r--r-- | arch/sparc64/kernel/us3_cpufreq.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/us3_cpufreq.c b/arch/sparc64/kernel/us3_cpufreq.c index 6d1f9a3c464f..a912c45bdc05 100644 --- a/arch/sparc64/kernel/us3_cpufreq.c +++ b/arch/sparc64/kernel/us3_cpufreq.c @@ -203,6 +203,9 @@ static int __init us3_freq_init(void) unsigned long manuf, impl, ver; int ret; + if (tlb_type != cheetah && tlb_type != cheetah_plus) + return -ENODEV; + __asm__("rdpr %%ver, %0" : "=r" (ver)); manuf = ((ver >> 48) & 0xffff); impl = ((ver >> 32) & 0xffff); |
