- 20 3月, 2006 40 次提交
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由 David S. Miller 提交于
get_new_mmu_context() can be invoked from interrupt context now for the new SMP version wrap handling. So disable interrupt while taking ctx_alloc_lock in destroy_context() so we don't deadlock. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
The context allocation scheme we use depends upon there being a 1<-->1 mapping from cpu to physical TLB for correctness. Chips like Niagara break this assumption. So what we do is notify all cpus with a cross call when the context version number changes, and if necessary this makes them allocate a valid context for the address space they are running at the time. Stress tested with make -j1024, make -j2048, and make -j4096 kernel builds on a 32-strand, 8 core, T2000 with 16GB of ram. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Otherwise with too much stuff enabled in the kernel config we can end up with an unaligned trap table. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
SBUS flash driver needs it. Noticed by Fabbione. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Niagara helps us find a ancient bug in the sparc64 port :-) The ASI_* values are plain constant defines, thus signed 32-bit on sparc64. To put shift this into the regs->tstate value we were doing or'ing "(ASI_PNF << 24)" into there. ASI_PNF is 0x82 and shifted left by 24 makes that topmost bit the sign bit in a 32-bit value. This would get sign extended to 64-bits and thus corrupt the top-half of the reg->tstate value. This never caused problems in pre-Niagara cpus because the only thing up there were the condition code values. But Niagara has the global register level field, and this all 1's value is illegal there so Niagara gives an illegal instruction trap due to this bug. I'm pretty sure this bug is about as old as the sparc64 port itself. This also points out that we weren't setting ASI_PNF for 32-bit tasks. We should, so fix that while we're here. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
If we take a window fault, on SUN4V set %gl to zero before we turn PSTATE_IE back on in %pstate. Otherwise if we take an interrupt we'll end up with corrupt register state. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
It can map all of the linear kernel mappings with zero TSB hash conflicts for systems with 16GB or less ram. In such cases, on SUN4V, once we load up this TSB the first time with all the mappings, we never take a linear kernel mapping TLB miss ever again, the hypervisor handles them all. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
We use a bitmap, one bit for every 256MB of memory. If the bit is set we can use a 256MB PTE for linear mappings, else we have to use a 4MB PTE. SUN4V support is there, and we can very easily add support for Panther cpu 256MB PTEs in the future. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
We have to turn off the "polling nrflag" bit when we sleep the cpu like this, so that we'll get a cross-cpu interrupt to wake the processor up from the yield. We also have to disable PSTATE_IE in %pstate around the yield call and recheck need_resched() in order to avoid any races. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Set, but never used. We used to use this for dynamic IRQ retargetting, but that code died a long time ago. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
They were getting truncated to 32-bit and this is very bad when your MMU fault status area is in physical memory above 4GB on SUN4V. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
The math-emu code only expects unfinished fpop traps when emulating FPU sqrt instructions on pre-Niagara chips. On Niagara we can get unimplemented fpop, so handle that. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Because we play this trick where we use ttyS? in increasing minor numbers for different sunfoo.c drivers, we have to inform the TTY layer of this. Do so by setting the tty->name_base appropriately. Probably there should be a generic way to do this in the serial core, but for now... Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Should be "Dax" not "Iax". Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
By simply changing the do-while loop into a plain while loop. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
I forgot to remove the one in pci_4v_map_sg() during the iommu batching commit. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Actually make use of the 'limit' we compute. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
It's extremely noisy and causes much grief on slow consoles with large numbers of cpus. We'll have to provide this some saner way in order to re-enable this. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Use a batching queue system for IOMMU mapping setup, with a page sized batch. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
We're about to seriously die in these cases so it is important that the messages make it to the console. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Another case where we have to force ourselves into global register level one. Also make sure the arguments passed to sun4v_do_mna() are correct. This area actually needs some more work, for example spill fixup is not necessarily going to do the right thing for this case. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Just like kvmap_dtlb_longpath we have to force the global register level to one in order to mimick the PSTATE_MG --> PSTATE_AG trasition done on SUN4U. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Caller takes the lock already. Also, fixup the poll loop in sunhv_break_ctl(). Just like in console write, we udelay(2) and use a loop limit of 1000000 iterations. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
So that it will show up as /dev/ttyS0. Otherwise things like installers will try to run on whatever serial port gets probed first. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
For drivers/media/*, noticed by Fabbione. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Fabio M. Di Nitto 提交于
Signed-off-by: NFabio M. Di Nitto <fabbione@ubuntu.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
The SUN4V convention with non-shared TSBs is that the context bit of the TAG is clear. So we have to choose an "invalid" bit and initialize new TSBs appropriately. Otherwise a zero TAG looks "valid". Make sure, for the window fixup cases, that we use the right global registers and that we don't potentially trample on the live global registers in etrap/rtrap handling (%g2 and %g6) and that we put the missing virtual address properly in %g5. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
1) Add error return checking for TLB load hypervisor calls. 2) Don't fallthru to dtlb tsb miss handler from itlb tsb miss handler, oops. 3) On window fixups, propagate fault information to fixup handler correctly. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
It must be ready when we take over the trap table. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
This gives more consistent bogomips and delay() semantics, especially on sun4v. It gives weird looking values though... Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
It should be 1, not 0. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
It's 0x9 not 0xb. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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