- 08 Dec, 2011 10 commits
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Anton Blanchard authored
We might enter the secondary CPU capture code twice, eg if we have to unstick some CPUs with a system reset. In this case we don't want to overwrite the state on CPUs that had made it into the capture code OK, so use the cpus_state_saved cpumask for that and make it local to crash_ipi_callback. For controlling progress now use atomic_t cpus_in_crash to count how many CPUs have made it into the kdump code, and time_to_dump to tell everyone it's time to dump. Signed-off-by:
Anton Blanchard <anton@samba.org> Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Anton Blanchard authored
If we enter the kdump code via system reset, wait a bit before sending the IPI to capture all secondary CPUs. Without it we race with the hypervisor that is issuing the system reset to each CPU. If the IPI gets there first the system reset oops output then shows the register state of the IPI handler which is not what we want. I took the opportunity to add defines for all the various delays we have. There's no need for cpu_relax when we are doing an mdelay, so remove them too. Signed-off-by:
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Anton Blanchard authored
I have an intermittent kdump fail where the hypervisor fails an H_EOI. As a result our CPPR is never reset to 0xff and we no longer accept interrupts. This patch calls icp_hv_set_cppr to reset the CPPR if H_EOI fails, fixing the kdump fail. Signed-off-by:
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Anton Blanchard authored
We've had a 180 second panic timeout on ppc64 for as long as I can remember. This patch reduces it to 10 seconds on pseries for a few reasons: - Almost all pseries machines have a hypervisor console so panic output will be available in a scrollback buffer. - The 180 seconds impacts our availability, users (other than kernel hackers) just want the box to come back around so it can continue its work. - I spend a lot of my life staring at the 180 second panic timeout. Many pseries machines take minutes to power cycle, so it's quicker to sit through the 180 seconds than it is to power cycle. Signed-off-by:
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Anton Blanchard authored
Our die() code was based off a very old x86 version. Update it to mirror the current x86 code. Signed-off-by:
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Anton Blanchard authored
Remove some unnecessary defines and fix some spelling mistakes. Signed-off-by:
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Anton Blanchard authored
We can handle recursion caused by system reset by reusing the crash shutdown fault handler. Since we don't have an OS triggerable NMI, if all CPUs don't make it into kdump then we tell the user to issue a system reset. However if we have a panic timeout set we cannot wait forever and must continue the kdump. Signed-off-by:
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Anton Blanchard authored
We have a lot of complicated logic that handles possible recursion between kdump and a system reset exception. We can solve this in a much simpler way using the same setjmp/longjmp tricks xmon does. As a first step, this patch removes the old system reset code. Signed-off-by:
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Anton Blanchard authored
I've been seeing truncated output when people send system reset info to me. We should see a backtrace for every CPU, but the panic() code takes the box down before they all make it out to the console. The panic code runs unlocked so we also see corrupted console output. If we are going to panic, then delay 1 second before calling into the panic code. Move oops_exit inside the die lock and put a newline between oopses for clarity. Signed-off-by:
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Benjamin Herrenschmidt authored
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- 07 Dec, 2011 28 commits
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Benjamin Herrenschmidt authored
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Benjamin Herrenschmidt authored
It's only used inside the same file where it's defined. There's also no point exporting it anymore. Signed-off-by: -
Benjamin Herrenschmidt authored
Open Firmware on OPAL machines seems to have issues if we close stdin and/or we try to print things after calling "quiesce" so we avoid doing both. Signed-off-by: -
Benjamin Herrenschmidt authored
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Benjamin Herrenschmidt authored
This adds some more interfaces for OPAL v2 Signed-off-by: -
Becky Bruce authored
Define HUGETLB_NEED_PRELOAD in mmu-book3e.h for CONFIG_PPC64 instead of having a much more complicated #if block. This is easier to read and maintain. Signed-off-by:
Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by:
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Becky Bruce authored
This avoids an extra find_vma() and is less error-prone. Signed-off-by:
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Becky Bruce authored
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Becky Bruce authored
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Becky Bruce authored
Allow hugetlb to be enabled on 64b FSL_BOOK3E. No platforms enable it by default yet. Signed-off-by:
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Becky Bruce authored
For 64-bit FSL_BOOKE implementations, gigantic pages need to be reserved at boot time by the memblock code based on the command line. This adds the call that handles the reservation, and fixes some code comments. It also removes the previous pr_err when reserve_hugetlb_gpages is called on a system without hugetlb enabled - the way the code is structured, the call is unconditional and the resulting error message spurious and confusing. Signed-off-by:
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Becky Bruce authored
Before hugetlb, at each level of the table, we test for !0 to determine if we have a valid table entry. With hugetlb, this compare becomes: < 0 is a normal entry 0 is an invalid entry > 0 is huge This works because the hugepage code pulls the top bit off the entry (which for non-huge entries always has the top bit set) as an indicator that we have a hugepage. Signed-off-by: -
Becky Bruce authored
I happened to comment this code while I was digging through it; we might as well commit that. I also made some whitespace changes - the existing code had a lot of unnecessary newlines that I found annoying when I was working on my tiny laptop. No functional changes. Signed-off-by:
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Becky Bruce authored
The original 32-bit hugetlb implementation used PPC64 vs PPC32 to determine which code path to take. However, the final hugetlb implementation for 64-bit FSL ended up shared with the FSL 32-bit code so the actual check needs to be FSL_BOOK3E vs everything else. This patch changes the include protections to reflect this. There are also a couple of related comment fixes. Signed-off-by:
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Becky Bruce authored
This updates the hugetlb page table code to handle 64-bit FSL_BOOKE. The previous 32-bit work counted on the inner levels of the page table collapsing. Signed-off-by:
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Becky Bruce authored
This patch does 2 things: It corrects the code that determines the size to write into MAS1 for the PPC_MM_SLICES case (this originally came from David Gibson and I had incorrectly altered it), and it changes the methodolody used to calculate the size for !PPC_MM_SLICES to work for 64-bit as well as 32-bit. Signed-off-by:
David Gibson <david@gibson.dropbear.id.au> Signed-off-by:
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Becky Bruce authored
There was an unconditional return of "1" in the original code from David Gibson, and I dropped it because it wasn't needed for FSL BOOKE 32-bit. However, not all systems (including 64-bit FSL BOOKE) do loading of the hpte from the fault handler asm and depend on this function returning 1, which causes a call to update_mmu_cache() that writes an entry into the tlb. Signed-off-by:
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Becky Bruce authored
If we don't have slices, we should be able to use the generic hugetlb_get_unmapped_area() code Signed-off-by:
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Kyle Moffett authored
The Cell and PowerMac platforms use virtually identical cascaded-IRQ setup code, so just merge it into the core. Ideally this code would trigger automatically when an MPIC device-node specifies an "interrupts" property, perhaps even enabling MPIC_SECONDARY along the way. Unfortunately, Benjamin Herrenschmidt has had bad experiences in the past with the quality of Apple PowerMac device-trees, so to be safe we will only try to parse out an IRQ if the MPIC_SECONDARY flag is set by the caller. Signed-off-by:
Kyle Moffett <Kyle.D.Moffett@boeing.com> Signed-off-by:
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Kyle Moffett authored
Store the node pointer in the MPIC during initialization so that all of the later operational code can just reuse the cached pointer. Signed-off-by:
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Kyle Moffett authored
There's not really any reason to have this one-liner in a separate static inline function, given that all the other similar tests are already in the alloc_mpic() code. Signed-off-by:
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Kyle Moffett authored
Don't open-code the OpenFirmware "dcr-reg" property lookup trying to map DCR resources. This makes the code a bit easier to read. Signed-off-by:
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Kyle Moffett authored
It turns out that there are only 2 in-tree platforms which use MPICs which are not "primary": IBM Cell and PowerMac. To reduce the complexity of the typical board setup code, invert the MPIC_PRIMARY bit into MPIC_SECONDARY. Signed-off-by:
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Kyle Moffett authored
Almost all PowerPC platforms use a standard "open-pic" device node so the mpic_alloc() function now accepts NULL for the device-node. This will cause it to perform a default search with of_find_matching_node(). Signed-off-by:
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Kyle Moffett authored
The MPIC code can already perform an automatic OF address translation step as part of mpic_alloc(), but several boards need to use that base address when they perform mpic_assign_isu(). The easiest solution is to save the computed physical address into the "struct mpic" for later use by the board code. Signed-off-by:
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Kyle Moffett authored
All of the existing callers of mpic_alloc() pass in a non-NULL device-node pointer, so the checks for a NULL device-node may be removed. Signed-off-by:
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Kyle Moffett authored
Instead of using the open-coded "reg" property lookup and address translation in mpic_alloc(), directly call of_address_to_resource(). This includes various workarounds for special cases which the naive of_address_translate() does not. Afterwards it is possible to remove the copiously copy-pasted calls to of_address_translate() from the 85xx/86xx/powermac platforms. Signed-off-by:
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Kyle Moffett authored
This removes a bunch of "extern" declarations and CONFIG_SMP ifdefs. Signed-off-by:
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- 28 Nov, 2011 2 commits
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Dan McGee authored
Since commit 8a0a9bd4, this comment in mmap_rnd() does not hold true as the value returned by get_random_int() will in fact be different every single call. Remove the comment and simplify the code back to its original desired form. This reverts commit a5adc91a which is no longer necessary and also fixes the sparc code that copied this same adjustment. Signed-off-by:
Dan McGee <dpmcgee@gmail.com> Acked-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Anton Blanchard authored
During kdump stress testing I sometimes see the kdump kernel panic with: Interrupt 0x306 (real) is invalid, disabling it. Kernel panic - not syncing: bad return code EOI - rc = -4, value=ff000306 Instead of panicing print the error message, dump the stack the first time it happens and continue on. Add some more information to the debug messages as well. Signed-off-by:
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