- 16 Apr, 2005 36 commits
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Kumar Gala authored
To add support for 36-bit physical addressing on e500 the following changes have been made. The changes are generalized to support any physical address size larger than 32-bits: * Allow FSL Book-E parts to use a 64-bit PTE, it is 44-bits of pfn, 20-bits of flags. * Introduced new CPU feature (CPU_FTR_BIG_PHYS) to allow runtime handling of updating hardware register (SPRN_MAS7) which holds the upper 32-bits of physical address that will be written into the TLB. This is useful since not all e500 cores support 36-bit physical addressing. * Currently have a pass through implementation of fixup_bigphys_addr * Moved _PAGE_DIRTY in the 64-bit PTE case to free room for three additional storage attributes that may exist in future FSL Book-E cores and updated fault handler to copy these bits into the hardware TLBs. Signed-off-by:
Kumar Gala <kumar.gala@freescale.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Kumar Gala authored
Allow the pfn to be offset by more than just PAGE_SHIFT in the pte. Today, PAGE_SHIFT tends to allow us to have 12-bits of flags in the pte. In the future if we have a larger pte we can allocate more bits for flags by offsetting the pfn even further. Signed-off-by:
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Kumar Gala authored
CONFIG_PTE_64BIT & CONFIG_PHYS_64BIT are not currently consistently used in the code base. Fixed up the usage such that CONFIG_PTE_64BIT is used when we have a 64-bit PTE regardless of physical address width. CONFIG_PHYS_64BIT is used if the physical address width is larger than 32-bits, regardless of PTE size. These changes required a few sub-arch specific ifdef's to be fixed and the introduction of a physical address format string. Signed-off-by:
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Kumar Gala authored
While the existing pte_update code handled atomically modifying a 64-bit PTE, it did not return all 64-bits of the PTE before it was modified. This causes problems in some places that expect the full PTE to be returned, like ptep_get_and_clear(). Created a new pte_update function that is conditional on CONFIG_PTE_64BIT. It atomically reads the low PTE word which all PTE flags are required to be in and returns a premodified full 64-bit PTE. Since we now have an explicit 64-bit PTE version of pte_update we can also remove the hack that existed to get the low PTE word regardless of size. Signed-off-by:
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Benjamin Herrenschmidt authored
My previous patch that added sleep support for uninorth-agp and some AGP "off" stuff in radeonfb and aty128fb is breaking some configs. More specifically, it has problems with rage128 setups since the DRI code for these in X doesn't properly re-enable AGP on wakeup or console switch (unlike the radeon DRM). This patch fixes the problem for pmac once for all by using a different approach. The AGP driver "registers" special suspend/resume callbacks with some arch code that the fbdev's can later on call to suspend and resume AGP, making sure it's resumed back in the same state it was when suspended. This is platform specific for now. It would be too complicated to try to do a generic implementation of this at this point due to all sort of weird things going on with AGP on other architectures. We'll re-work that whole problem cleanly once we finally merge fbdev's and DRI. In the meantime, please apply this patch which brings back some r128 based laptops into working condition as far as system sleep is concerned. Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Benjamin Herrenschmidt authored
This patch updates the PowerMac cpufreq driver. It depends on the addition of the suspend() method (my previous patch) and on the new flag I defined to silence some warnings that are normal for us. It fixes various issues related to cpufreq on pmac, including some crashes on some models when sleeping the machine while in low speed, proper voltage control on some newer machines, and adds voltage control on 750FX based G3 laptops. Signed-off-by:
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Paul Mackerras authored
On ppc, we emulate instructions that cause alignment exceptions. If we are single-stepping an instruction and it causes an alignment exception, we will currently do the next instruction as well before taking the single-step exception. This patch fixes that, so we take the single-step exception after emulating the instruction. Signed-off-by:
Paul Mackerras <paulus@samba.org> Signed-off-by:
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Paul Mackerras authored
If we should happen to get an altivec assist exception while executing in the kernel, we will currently try to handle it and fail, and end up oopsing with (apparently) a segfault. (An altivec assist exception occurs for floating-point altivec instructions with denormalized inputs or outputs if the altivec unit is in java mode.) This patch checks explicitly if we are in user mode and prints a useful message if not. Signed-off-by:
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Paul Mackerras authored
Currently the procedure in the ppc32 kernel that synchronizes the timebase registers across an SMP powermac system does so by setting both timebases to zero. That is OK at boot but causes problems if done later. So that we can do hotplug CPU on these machines, this patch changes the code so it reads the timebase from one CPU and transfers the value to the other CPU. (Hotplug CPU is needed for sleep (aka suspend to RAM) to work.) Signed-off-by:
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Eugene Surovegin authored
This patch adds interrupt acknowledge to the PPC4xx PIC enable_irq implementation for level-sensitive IRQ sources. This helps in cases when enable/disable_irq is used in interrupt handlers for hardware, which requires IRQ acknowledge to be issued from non-interrupt context (e.g. when actual ACK in device needs an I2C transaction). For such strange hardware, interrupt handler disables IRQ and defers actual ACK to some other context. When this happens, IRQ is enabled again. For level-sensitive sources we get spurious triggering right after IRQ is enabled. This patch fixes this. Suggested by Tolunay Orkun <listmember@orkun.us>. Signed-off-by:
Eugene Surovegin <ebs@ebshome.net> Signed-off-by:
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Paul Mackerras authored
The code that went into arch/ppc/kernel/signal.c recently to handle process freezing seems to contain a dubious assumption: that a process that calls do_signal when PF_FREEZE is set will have entered the kernel because of a system call. This patch removes that assumption. Signed-off-by:
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James Morris authored
This patch adds SELinux support for the KOBJECT_UEVENT Netlink family, so that SELinux can apply finer grained controls to it. For example, security policy for hald can be locked down to the KOBJECT_UEVENT Netlink family only. Currently, this family simply defaults to the default Netlink socket class. Note that some new permission definitions are added to sync with changes in the core userspace policy package, which auto-generates header files. Signed-off-by:
James Morris <jmorris@redhat.com> Signed-off-by:
Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by:
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Jean Tourrilhes authored
Acked-by:
"David S. Miller" <davem@davemloft.net> Signed-off-by:
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Herbert Xu authored
When we are not the real parent of the dst (e.g., when we're xfrm_dst and the child is an rtentry), it may already be on the GC list. In fact the current code is buggy to, we need to check dst->flags before the dec as dst may no longer be valid afterwards. Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Arnaldo Carvalho de Melo authored
This fixes the warning reported by Marcel Holtmann (Thanks!). Signed-off-by:
Arnaldo Carvalho de Melo <acme@conectiva.com.br> Signed-off-by:
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David S. Miller authored
This recently got changed to include a lot of kernel internal stuff in the non-__KERNEL__ area of the header, which isn't so kosher and breaks libc builds. The fix is pretty simple. Signed-off-by:
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Martin Hicks authored
Working on some code lately I've been getting huge values for "Cached". The cause is that get_page_cache_size() is an approximate value, and for a sufficiently small returned value of get_page_cache_size() the value underflows. Signed-off-by:
Martin Hicks <mort@sgi.com> Signed-off-by:
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akpm@osdl.org authored
Signed-off-by:
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akpm@osdl.org authored
) We only call pageout() for dirty pages, so this test is redundant. Signed-off-by:
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Andrea Arcangeli authored
iscsi/lvm2/multipath needs guaranteed protection from the oom-killer, so make the magical value of -17 in /proc/<pid>/oom_adj defeat the oom-killer altogether. (akpm: we still need to document oom_adj and friends in Documentation/filesystems/proc.txt!) Signed-off-by:
Andrea Arcangeli <andrea@suse.de> Signed-off-by:
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Jeff Moyer authored
We will return NULL from filemap_getpage when a page does not exist in the page cache and MAP_NONBLOCK is specified, here: page = find_get_page(mapping, pgoff); if (!page) { if (nonblock) return NULL; goto no_cached_page; } But we forget to do so when the page in the cache is not uptodate. The following could result in a blocking call: /* * Ok, found a page in the page cache, now we need to check * that it's up-to-date. */ if (!PageUptodate(page)) goto page_not_uptodate; Signed-off-by: -
Dave Airlie authored
drm: fix r128_state.c switch statements.. in drivers/char/drm/r128_state.c (linux-2.6.12-rc2), some breaks are missing in the switch statement. See trivial fix below. Signed-off-by:
Hansjoerg Lipp <hjlipp@web.de> Signed-off-by:
Dave Airlie <airlied@linux.ie> Signed-off-by:
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James Morris authored
This patch fixes a bug in the SELinux Netlink message type detection code, where the wrong constant was being used in a case statement. The incorrect value is not valid for this class of object so it would not have been reached, and fallen through to a default handler for all Netlink messages. Signed-off-by:
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akpm@osdl.org authored
) From: Johannes Stezenbach <js@linuxtv.org> Fix http://bugme.osdl.org/show_bug.cgi?id=4395. Patch by Manu Abraham and Gerd Knorr: Remove redundant bttv_reset_audio() which caused the computer to freeze with some bt8xx based DVB cards when loading the bttv driver. Signed-off-by:
Johannes Stezenbach <js@linuxtv.org> Signed-off-by:
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David S. Miller authored
I have no idea how a bug like this lasted so long. Anyways, obvious memset()'ing of incorrect pointer. Signed-off-by:
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Stas Sergeev authored
Fix the access-above-bottom-of-stack crash. 1. Allows to preserve the valueable optimization 2. Works for NMIs 3. Doesn't care whether or not there are more of the like instances where the stack is left empty. 4. Seems to work for me without the crashes:) (akpm: this is still under discussion, although I _think_ it's OK. You might want to hold off) Signed-off-by: Stas Sergeev <stsp@aknet.ru> Signed-off-by:
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akpm@osdl.org authored
) From: Andreas Gruenbacher <agruen@suse.de> ext[23]_get_acl will return an error when reading the attribute fails or out-of-memory occurs. Catch this case. Signed-off-by:
Andreas Gruenbacher <agruen@suse.de> Signed-off-by:
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James Bottomley authored
This was unexported by Arjan because we have no current users. However, during a conversion from tasklets to workqueues of the parisc led functions, we ran across a case where this was needed. In particular, the open coded equivalent of cancel_rearming_delayed_workqueue was implemented incorrectly, which is, I think, all the evidence necessary that this is a useful API. Signed-off-by:
James Bottomley <James.Bottomley@SteelEye.com> Signed-off-by:
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Artem B. Bityuckiy authored
In the deflate_[compress|uncompress|pcompress] functions we call the zlib_[in|de]flateReset function at the beginning. This is OK. But when we unload the deflate module we don't call zlib_[in|de]flateEnd to free all the zlib internal data. It looks like a bug for me. Please, consider the attached patch. Signed-off-by:
Artem B. Bityuckiy <dedekind@infradead.org> Signed-off-by:
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akpm@osdl.org authored
) From: Russell King <rmk+lkml@arm.linux.org.uk> Oddly, max_low_pfn/max_pfn end up being the number of pages in the system, rather than the maximum PFN on ARM. This doesn't seem to cause any problems, so just add a note about it. Signed-off-by:
Russell King <rmk@arm.linux.org.uk> Signed-off-by:
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akpm@osdl.org authored
) From: Russell King <rmk+lkml@arm.linux.org.uk> The ARM dma_supported() is rather basic, and I don't think it takes into account everything that it should do (eg, whether the mask agrees with what we'd return for GFP_DMA allocations). Note this. Signed-off-by:
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akpm@osdl.org authored
) From: Russell King <rmk+lkml@arm.linux.org.uk> For some reason, this help text was missed when the file was last audited by the documentation referencing folk. Fix this incorrect documentation reference. Signed-off-by:
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akpm@osdl.org authored
) From: Russell King <rmk+lkml@arm.linux.org.uk> ARM wasn't raising a SIGBUS with a siginfo structure. Fix __do_user_fault() to allow us to use it for SIGBUS conditions, and arrange for the sigbus path to use this. We need to prevent the siginfo code being called if we do not have a user space context to call it, so consolidate the "user_mode()" tests. Thanks to Ian Campbell who spotted this oversight. Signed-off-by:
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Neil Brown authored
..as sync_page_io can be called on the write-out path. Signed-off-by:
Neil Brown <neilb@cse.unsw.edu.au> Signed-off-by:
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Christoph Lameter authored
Signed-off-by:
Christoph Lameter <clameter@sgi.com> Signed-off-by:
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Linus Torvalds authored
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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