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* xen/arm: compile and run xenbusStefano Stabellini2012-09-173-16/+41
| | | | | | | | | | | | | | | | | | bind_evtchn_to_irqhandler can legitimately return 0 (irq 0): it is not an error. If Linux is running as an HVM domain and is running as Dom0, use xenstored_local_init to initialize the xenstore page and event channel. Changes in v4: - do not xs_reset_watches on dom0. Changes in v2: - refactor xenbus_init. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> [v5: Fixed case switch indentations] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* xen: resynchronise grant table status codes with upstreamIan Campbell2012-09-141-2/+6
| | | | | | | Adds GNTST_address_too_big and GNTST_eagain. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* Merge branch 'stable/128gb.v5.1' into stable/for-linus-3.7Konrad Rzeszutek Wilk2012-09-125-47/+254
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * stable/128gb.v5.1: xen/mmu: If the revector fails, don't attempt to revector anything else. xen/p2m: When revectoring deal with holes in the P2M array. xen/mmu: Release just the MFN list, not MFN list and part of pagetables. xen/mmu: Remove from __ka space PMD entries for pagetables. xen/mmu: Copy and revector the P2M tree. xen/p2m: Add logic to revector a P2M tree to use __va leafs. xen/mmu: Recycle the Xen provided L4, L3, and L2 pages xen/mmu: For 64-bit do not call xen_map_identity_early xen/mmu: use copy_page instead of memcpy. xen/mmu: Provide comments describing the _ka and _va aliasing issue xen/mmu: The xen_setup_kernel_pagetable doesn't need to return anything. Revert "xen/x86: Workaround 64-bit hypervisor and 32-bit initial domain." and "xen/x86: Use memblock_reserve for sensitive areas." xen/x86: Workaround 64-bit hypervisor and 32-bit initial domain. xen/x86: Use memblock_reserve for sensitive areas. xen/p2m: Fix the comment describing the P2M tree. Conflicts: arch/x86/xen/mmu.c The pagetable_init is the old xen_pagetable_setup_done and xen_pagetable_setup_start rolled in one. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen/mmu: If the revector fails, don't attempt to revector anything else.Konrad Rzeszutek Wilk2012-08-231-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | If the P2M revectoring would fail, we would try to continue on by cleaning the PMD for L1 (PTE) page-tables. The xen_cleanhighmap is greedy and erases the PMD on both boundaries. Since the P2M array can share the PMD, we would wipe out part of the __ka that is still used in the P2M tree to point to P2M leafs. This fixes it by bypassing the revectoring and continuing on. If the revector fails, a nice WARN is printed so we can still troubleshoot this. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen/p2m: When revectoring deal with holes in the P2M array.Konrad Rzeszutek Wilk2012-08-231-3/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we free the PFNs and then subsequently populate them back during bootup: Freeing 20000-20200 pfn range: 512 pages freed 1-1 mapping on 20000->20200 Freeing 40000-40200 pfn range: 512 pages freed 1-1 mapping on 40000->40200 Freeing bad80-badf4 pfn range: 116 pages freed 1-1 mapping on bad80->badf4 Freeing badf6-bae7f pfn range: 137 pages freed 1-1 mapping on badf6->bae7f Freeing bb000-100000 pfn range: 282624 pages freed 1-1 mapping on bb000->100000 Released 283999 pages of unused memory Set 283999 page(s) to 1-1 mapping Populating 1acb8a-1f20e9 pfn range: 283999 pages added We end up having the P2M array (that is the one that was grafted on the P2M tree) filled with IDENTITY_FRAME or INVALID_P2M_ENTRY) entries. The patch titled "xen/p2m: Reuse existing P2M leafs if they are filled with 1:1 PFNs or INVALID." recycles said slots and replaces the P2M tree leaf's with &mfn_list[xx] with p2m_identity or p2m_missing. And re-uses the P2M array sections for other P2M tree leaf's. For the above mentioned bootup excerpt, the PFNs at 0x20000->0x20200 are going to be IDENTITY based: P2M[0][256][0] -> P2M[0][257][0] get turned in IDENTITY_FRAME. We can re-use that and replace P2M[0][256] to point to p2m_identity. The "old" page (the grafted P2M array provided by Xen) that was at P2M[0][256] gets put somewhere else. Specifically at P2M[6][358], b/c when we populate back: Populating 1acb8a-1f20e9 pfn range: 283999 pages added we fill P2M[6][358][0] (and P2M[6][358], P2M[6][359], ...) with the new MFNs. That is all OK, except when we revector we assume that the PFN count would be the same in the grafted P2M array and in the newly allocated. Since that is no longer the case, as we have holes in the P2M that point to p2m_missing or p2m_identity we have to take that into account. [v2: Check for overflow] [v3: Move within the __va check] [v4: Fix the computation] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen/mmu: Release just the MFN list, not MFN list and part of pagetables.Konrad Rzeszutek Wilk2012-08-231-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We call memblock_reserve for [start of mfn list] -> [PMD aligned end of mfn list] instead of <start of mfn list> -> <page aligned end of mfn list]. This has the disastrous effect that if at bootup the end of mfn_list is not PMD aligned we end up returning to memblock parts of the region past the mfn_list array. And those parts are the PTE tables with the disastrous effect of seeing this at bootup: Write protecting the kernel read-only data: 10240k Freeing unused kernel memory: 1860k freed Freeing unused kernel memory: 200k freed (XEN) mm.c:2429:d0 Bad type (saw 1400000000000002 != exp 7000000000000000) for mfn 116a80 (pfn 14e26) ... (XEN) mm.c:908:d0 Error getting mfn 116a83 (pfn 14e2a) from L1 entry 8000000116a83067 for l1e_owner=0, pg_owner=0 (XEN) mm.c:908:d0 Error getting mfn 4040 (pfn 5555555555555555) from L1 entry 0000000004040601 for l1e_owner=0, pg_owner=0 .. and so on. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen/mmu: Remove from __ka space PMD entries for pagetables.Konrad Rzeszutek Wilk2012-08-231-0/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Please first read the description in "xen/mmu: Copy and revector the P2M tree." At this stage, the __ka address space (which is what the old P2M tree was using) is partially disassembled. The cleanup_highmap has removed the PMD entries from 0-16MB and anything past _brk_end up to the max_pfn_mapped (which is the end of the ramdisk). The xen_remove_p2m_tree and code around has ripped out the __ka for the old P2M array. Here we continue on doing it to where the Xen page-tables were. It is safe to do it, as the page-tables are addressed using __va. For good measure we delete anything that is within MODULES_VADDR and up to the end of the PMD. At this point the __ka only contains PMD entries for the start of the kernel up to __brk. [v1: Per Stefano's suggestion wrapped the MODULES_VADDR in debug] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen/mmu: Copy and revector the P2M tree.Konrad Rzeszutek Wilk2012-08-231-0/+57
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Please first read the description in "xen/p2m: Add logic to revector a P2M tree to use __va leafs" patch. The 'xen_revector_p2m_tree()' function allocates a new P2M tree copies the contents of the old one in it, and returns the new one. At this stage, the __ka address space (which is what the old P2M tree was using) is partially disassembled. The cleanup_highmap has removed the PMD entries from 0-16MB and anything past _brk_end up to the max_pfn_mapped (which is the end of the ramdisk). We have revectored the P2M tree (and the one for save/restore as well) to use new shiny __va address to new MFNs. The xen_start_info has been taken care of already in 'xen_setup_kernel_pagetable()' and xen_start_info->shared_info in 'xen_setup_shared_info()', so we are free to roam and delete PMD entries - which is exactly what we are going to do. We rip out the __ka for the old P2M array. [v1: Fix smatch warnings] [v2: memset was doing 0 instead of 0xff] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen/p2m: Add logic to revector a P2M tree to use __va leafs.Konrad Rzeszutek Wilk2012-08-232-0/+71
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | During bootup Xen supplies us with a P2M array. It sticks it right after the ramdisk, as can be seen with a 128GB PV guest: (certain parts removed for clarity): xc_dom_build_image: called xc_dom_alloc_segment: kernel : 0xffffffff81000000 -> 0xffffffff81e43000 (pfn 0x1000 + 0xe43 pages) xc_dom_pfn_to_ptr: domU mapping: pfn 0x1000+0xe43 at 0x7f097d8bf000 xc_dom_alloc_segment: ramdisk : 0xffffffff81e43000 -> 0xffffffff925c7000 (pfn 0x1e43 + 0x10784 pages) xc_dom_pfn_to_ptr: domU mapping: pfn 0x1e43+0x10784 at 0x7f0952dd2000 xc_dom_alloc_segment: phys2mach : 0xffffffff925c7000 -> 0xffffffffa25c7000 (pfn 0x125c7 + 0x10000 pages) xc_dom_pfn_to_ptr: domU mapping: pfn 0x125c7+0x10000 at 0x7f0942dd2000 xc_dom_alloc_page : start info : 0xffffffffa25c7000 (pfn 0x225c7) xc_dom_alloc_page : xenstore : 0xffffffffa25c8000 (pfn 0x225c8) xc_dom_alloc_page : console : 0xffffffffa25c9000 (pfn 0x225c9) nr_page_tables: 0x0000ffffffffffff/48: 0xffff000000000000 -> 0xffffffffffffffff, 1 table(s) nr_page_tables: 0x0000007fffffffff/39: 0xffffff8000000000 -> 0xffffffffffffffff, 1 table(s) nr_page_tables: 0x000000003fffffff/30: 0xffffffff80000000 -> 0xffffffffbfffffff, 1 table(s) nr_page_tables: 0x00000000001fffff/21: 0xffffffff80000000 -> 0xffffffffa27fffff, 276 table(s) xc_dom_alloc_segment: page tables : 0xffffffffa25ca000 -> 0xffffffffa26e1000 (pfn 0x225ca + 0x117 pages) xc_dom_pfn_to_ptr: domU mapping: pfn 0x225ca+0x117 at 0x7f097d7a8000 xc_dom_alloc_page : boot stack : 0xffffffffa26e1000 (pfn 0x226e1) xc_dom_build_image : virt_alloc_end : 0xffffffffa26e2000 xc_dom_build_image : virt_pgtab_end : 0xffffffffa2800000 So the physical memory and virtual (using __START_KERNEL_map addresses) layout looks as so: phys __ka /------------\ /-------------------\ | 0 | empty | 0xffffffff80000000| | .. | | .. | | 16MB | <= kernel starts | 0xffffffff81000000| | .. | | | | 30MB | <= kernel ends => | 0xffffffff81e43000| | .. | & ramdisk starts | .. | | 293MB | <= ramdisk ends=> | 0xffffffff925c7000| | .. | & P2M starts | .. | | .. | | .. | | 549MB | <= P2M ends => | 0xffffffffa25c7000| | .. | start_info | 0xffffffffa25c7000| | .. | xenstore | 0xffffffffa25c8000| | .. | cosole | 0xffffffffa25c9000| | 549MB | <= page tables => | 0xffffffffa25ca000| | .. | | | | 550MB | <= PGT end => | 0xffffffffa26e1000| | .. | boot stack | | \------------/ \-------------------/ As can be seen, the ramdisk, P2M and pagetables are taking a bit of __ka addresses space. Which is a problem since the MODULES_VADDR starts at 0xffffffffa0000000 - and P2M sits right in there! This results during bootup with the inability to load modules, with this error: ------------[ cut here ]------------ WARNING: at /home/konrad/ssd/linux/mm/vmalloc.c:106 vmap_page_range_noflush+0x2d9/0x370() Call Trace: [<ffffffff810719fa>] warn_slowpath_common+0x7a/0xb0 [<ffffffff81030279>] ? __raw_callee_save_xen_pmd_val+0x11/0x1e [<ffffffff81071a45>] warn_slowpath_null+0x15/0x20 [<ffffffff81130b89>] vmap_page_range_noflush+0x2d9/0x370 [<ffffffff81130c4d>] map_vm_area+0x2d/0x50 [<ffffffff811326d0>] __vmalloc_node_range+0x160/0x250 [<ffffffff810c5369>] ? module_alloc_update_bounds+0x19/0x80 [<ffffffff810c6186>] ? load_module+0x66/0x19c0 [<ffffffff8105cadc>] module_alloc+0x5c/0x60 [<ffffffff810c5369>] ? module_alloc_update_bounds+0x19/0x80 [<ffffffff810c5369>] module_alloc_update_bounds+0x19/0x80 [<ffffffff810c70c3>] load_module+0xfa3/0x19c0 [<ffffffff812491f6>] ? security_file_permission+0x86/0x90 [<ffffffff810c7b3a>] sys_init_module+0x5a/0x220 [<ffffffff815ce339>] system_call_fastpath+0x16/0x1b ---[ end trace fd8f7704fdea0291 ]--- vmalloc: allocation failure, allocated 16384 of 20480 bytes modprobe: page allocation failure: order:0, mode:0xd2 Since the __va and __ka are 1:1 up to MODULES_VADDR and cleanup_highmap rids __ka of the ramdisk mapping, what we want to do is similar - get rid of the P2M in the __ka address space. There are two ways of fixing this: 1) All P2M lookups instead of using the __ka address would use the __va address. This means we can safely erase from __ka space the PMD pointers that point to the PFNs for P2M array and be OK. 2). Allocate a new array, copy the existing P2M into it, revector the P2M tree to use that, and return the old P2M to the memory allocate. This has the advantage that it sets the stage for using XEN_ELF_NOTE_INIT_P2M feature. That feature allows us to set the exact virtual address space we want for the P2M - and allows us to boot as initial domain on large machines. So we pick option 2). This patch only lays the groundwork in the P2M code. The patch that modifies the MMU is called "xen/mmu: Copy and revector the P2M tree." Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen/mmu: Recycle the Xen provided L4, L3, and L2 pagesKonrad Rzeszutek Wilk2012-08-231-7/+35
| | | | | | | | | | | | | | | | | | | | | | | | As we are not using them. We end up only using the L1 pagetables and grafting those to our page-tables. [v1: Per Stefano's suggestion squashed two commits] [v2: Per Stefano's suggestion simplified loop] [v3: Fix smatch warnings] [v4: Add more comments] Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen/mmu: For 64-bit do not call xen_map_identity_earlyKonrad Rzeszutek Wilk2012-08-231-6/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | B/c we do not need it. During the startup the Xen provides us with all the initial memory mapped that we need to function. The initial memory mapped is up to the bootstack, which means we can reference using __ka up to 4.f): (from xen/interface/xen.h): 4. This the order of bootstrap elements in the initial virtual region: a. relocated kernel image b. initial ram disk [mod_start, mod_len] c. list of allocated page frames [mfn_list, nr_pages] d. start_info_t structure [register ESI (x86)] e. bootstrap page tables [pt_base, CR3 (x86)] f. bootstrap stack [register ESP (x86)] (initial ram disk may be ommitted). [v1: More comments in git commit] Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen/mmu: use copy_page instead of memcpy.Konrad Rzeszutek Wilk2012-08-231-7/+6
| | | | | | | | | | | | | | After all, this is what it is there for. Acked-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen/mmu: Provide comments describing the _ka and _va aliasing issueKonrad Rzeszutek Wilk2012-08-231-0/+17
| | | | | | | | | | | | | | | | | | Which is that the level2_kernel_pgt (__ka virtual addresses) and level2_ident_pgt (__va virtual address) contain the same PMD entries. So if you modify a PTE in __ka, it will be reflected in __va (and vice-versa). Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen/mmu: The xen_setup_kernel_pagetable doesn't need to return anything.Konrad Rzeszutek Wilk2012-08-233-13/+4
| | | | | | | | | | | | | | We don't need to return the new PGD - as we do not use it. Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * Revert "xen/x86: Workaround 64-bit hypervisor and 32-bit initial domain." ↵Konrad Rzeszutek Wilk2012-08-233-65/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | and "xen/x86: Use memblock_reserve for sensitive areas." This reverts commit 806c312e50f122c47913145cf884f53dd09d9199 and commit 59b294403e9814e7c1154043567f0d71bac7a511. And also documents setup.c and why we want to do it that way, which is that we tried to make the the memblock_reserve more selective so that it would be clear what region is reserved. Sadly we ran in the problem wherein on a 64-bit hypervisor with a 32-bit initial domain, the pt_base has the cr3 value which is not neccessarily where the pagetable starts! As Jan put it: " Actually, the adjustment turns out to be correct: The page tables for a 32-on-64 dom0 get allocated in the order "first L1", "first L2", "first L3", so the offset to the page table base is indeed 2. When reading xen/include/public/xen.h's comment very strictly, this is not a violation (since there nothing is said that the first thing in the page table space is pointed to by pt_base; I admit that this seems to be implied though, namely do I think that it is implied that the page table space is the range [pt_base, pt_base + nt_pt_frames), whereas that range here indeed is [pt_base - 2, pt_base - 2 + nt_pt_frames), which - without a priori knowledge - the kernel would have difficulty to figure out)." - so lets just fall back to the easy way and reserve the whole region. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen/x86: Workaround 64-bit hypervisor and 32-bit initial domain.Konrad Rzeszutek Wilk2012-08-211-9/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If a 64-bit hypervisor is booted with a 32-bit initial domain, the hypervisor deals with the initial domain as "compat" and does some extra adjustments (like pagetables are 4 bytes instead of 8). It also adjusts the xen_start_info->pt_base incorrectly. When booted with a 32-bit hypervisor (32-bit initial domain): .. (XEN) Start info: cf831000->cf83147c (XEN) Page tables: cf832000->cf8b5000 .. [ 0.000000] PT: cf832000 (f832000) [ 0.000000] Reserving PT: f832000->f8b5000 And with a 64-bit hypervisor: (XEN) Start info: 00000000cf831000->00000000cf8314b4 (XEN) Page tables: 00000000cf832000->00000000cf8b6000 [ 0.000000] PT: cf834000 (f834000) [ 0.000000] Reserving PT: f834000->f8b8000 To deal with this, we keep keep track of the highest physical address we have reserved via memblock_reserve. If that address does not overlap with pt_base, we have a gap which we reserve. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen/x86: Use memblock_reserve for sensitive areas.Konrad Rzeszutek Wilk2012-08-213-9/+53
| | | | | | | | | | | | | | | | | | | | instead of a big memblock_reserve. This way we can be more selective in freeing regions (and it also makes it easier to understand where is what). [v1: Move the auto_translate_physmap to proper line] [v2: Per Stefano suggestion add more comments] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen/p2m: Fix the comment describing the P2M tree.Konrad Rzeszutek Wilk2012-08-211-7/+7
| | | | | | | | | | | | | | | | It mixed up the p2m_mid_missing with p2m_missing. Also remove some extra spaces. Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* | Merge branch 'x86/platform' of ↵Konrad Rzeszutek Wilk2012-09-128080-250986/+520290
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into stable/for-linus-3.7 * 'x86/platform' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (9690 commits) x86: Document x86_init.paging.pagetable_init() x86: xen: Cleanup and remove x86_init.paging.pagetable_setup_done() x86: Move paging_init() call to x86_init.paging.pagetable_init() x86: Rename pagetable_setup_start() to pagetable_init() x86: Remove base argument from x86_init.paging.pagetable_setup_start Linux 3.6-rc5 HID: tpkbd: work even if the new Lenovo Keyboard driver is not configured Remove user-triggerable BUG from mpol_to_str xen/pciback: Fix proper FLR steps. uml: fix compile error in deliver_alarm() dj: memory scribble in logi_dj Fix order of arguments to compat_put_time[spec|val] xen: Use correct masking in xen_swiotlb_alloc_coherent. xen: fix logical error in tlb flushing xen/p2m: Fix one-off error in checking the P2M tree directory. powerpc: Don't use __put_user() in patch_instruction powerpc: Make sure IPI handlers see data written by IPI senders powerpc: Restore correct DSCR in context switch powerpc: Fix DSCR inheritance in copy_thread() powerpc: Keep thread.dscr and thread.dscr_inherit in sync ...
| * | x86: Document x86_init.paging.pagetable_init()Attilio Rao2012-09-121-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Attilio Rao <attilio.rao@citrix.com> Acked-by: <konrad.wilk@oracle.com> Cc: <Ian.Campbell@citrix.com> Cc: <Stefano.Stabellini@eu.citrix.com> Cc: <xen-devel@lists.xensource.com> Link: http://lkml.kernel.org/r/1345580561-8506-6-git-send-email-attilio.rao@citrix.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | x86: xen: Cleanup and remove x86_init.paging.pagetable_setup_done()Attilio Rao2012-09-126-20/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | At this stage x86_init.paging.pagetable_setup_done is only used in the XEN case. Move its content in the x86_init.paging.pagetable_init setup function and remove the now unused x86_init.paging.pagetable_setup_done remaining infrastructure. Signed-off-by: Attilio Rao <attilio.rao@citrix.com> Acked-by: <konrad.wilk@oracle.com> Cc: <Ian.Campbell@citrix.com> Cc: <Stefano.Stabellini@eu.citrix.com> Cc: <xen-devel@lists.xensource.com> Link: http://lkml.kernel.org/r/1345580561-8506-5-git-send-email-attilio.rao@citrix.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | x86: Move paging_init() call to x86_init.paging.pagetable_init()Attilio Rao2012-09-125-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move the paging_init() call to the platform specific pagetable_init() function, so we can get rid of the extra pagetable_setup_done() function pointer. Signed-off-by: Attilio Rao <attilio.rao@citrix.com> Acked-by: <konrad.wilk@oracle.com> Cc: <Ian.Campbell@citrix.com> Cc: <Stefano.Stabellini@eu.citrix.com> Cc: <xen-devel@lists.xensource.com> Link: http://lkml.kernel.org/r/1345580561-8506-4-git-send-email-attilio.rao@citrix.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | x86: Rename pagetable_setup_start() to pagetable_init()Attilio Rao2012-09-126-11/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In preparation for unifying the pagetable_setup_start() and pagetable_setup_done() setup functions, rename appropriately all the infrastructure related to pagetable_setup_start(). Signed-off-by: Attilio Rao <attilio.rao@citrix.com> Ackedd-by: <konrad.wilk@oracle.com> Cc: <Ian.Campbell@citrix.com> Cc: <Stefano.Stabellini@eu.citrix.com> Cc: <xen-devel@lists.xensource.com> Link: http://lkml.kernel.org/r/1345580561-8506-3-git-send-email-attilio.rao@citrix.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | x86: Remove base argument from x86_init.paging.pagetable_setup_startAttilio Rao2012-09-126-9/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We either use swapper_pg_dir or the argument is unused. Preparatory patch to simplify platform pagetable setup further. Signed-off-by: Attilio Rao <attilio.rao@citrix.com> Ackedb-by: <konrad.wilk@oracle.com> Cc: <Ian.Campbell@citrix.com> Cc: <Stefano.Stabellini@eu.citrix.com> Cc: <xen-devel@lists.xensource.com> Link: http://lkml.kernel.org/r/1345580561-8506-2-git-send-email-attilio.rao@citrix.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | Linux 3.6-rc5v3.6-rc5Linus Torvalds2012-09-081-1/+1
| | |
| * | Merge branch 'fixes-for-3.6' of ↵Linus Torvalds2012-09-085-12/+120
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.linaro.org/people/mszyprowski/linux-dma-mapping Pull DMA-mapping fixes from Marek Szyprowski: "Another set of fixes for ARM dma-mapping subsystem. Commit e9da6e9905e6 replaced custom consistent buffer remapping code with generic vmalloc areas. It however introduced some regressions caused by limited support for allocations in atomic context. This series contains fixes for those regressions. For some subplatforms the default, pre-allocated pool for atomic allocations turned out to be too small, so a function for setting its size has been added. Another set of patches adds support for atomic allocations to IOMMU-aware DMA-mapping implementation. The last part of this pull request contains two fixes for Contiguous Memory Allocator, which relax too strict requirements." * 'fixes-for-3.6' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping: ARM: dma-mapping: IOMMU allocates pages from atomic_pool with GFP_ATOMIC ARM: dma-mapping: Introduce __atomic_get_pages() for __iommu_get_pages() ARM: dma-mapping: Refactor out to introduce __in_atomic_pool ARM: dma-mapping: atomic_pool with struct page **pages ARM: Kirkwood: increase atomic coherent pool size ARM: DMA-Mapping: print warning when atomic coherent allocation fails ARM: DMA-Mapping: add function for setting coherent pool size from platform code ARM: relax conditions required for enabling Contiguous Memory Allocator mm: cma: fix alignment requirements for contiguous regions
| | * | ARM: dma-mapping: IOMMU allocates pages from atomic_pool with GFP_ATOMICHiroshi Doyu2012-08-281-0/+36
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make use of the same atomic pool as DMA does, and skip a kernel page mapping which can involve sleep'able operations at allocating a kernel page table. Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
| | * | ARM: dma-mapping: Introduce __atomic_get_pages() for __iommu_get_pages()Hiroshi Doyu2012-08-281-0/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Support atomic allocation in __iommu_get_pages(). Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com> [moved __atomic_get_pages() under #ifdef CONFIG_ARM_DMA_USE_IOMMU to avoid unused fuction warning for no-IOMMU case] Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
| | * | ARM: dma-mapping: Refactor out to introduce __in_atomic_poolHiroshi Doyu2012-08-281-6/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Check the given range("start", "size") is included in "atomic_pool" or not. Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
| | * | ARM: dma-mapping: atomic_pool with struct page **pagesHiroshi Doyu2012-08-281-3/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | struct page **pages is necessary to align with non atomic path in __iommu_get_pages(). atomic_pool() has the intialized **pages instead of just *page. Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
| | * | ARM: Kirkwood: increase atomic coherent pool sizeMarek Szyprowski2012-08-281-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The default 256 KiB coherent pool may be too small for some of the Kirkwood devices, so increase it to make sure that devices will be able to allocate their buffers with GFP_ATOMIC flag. Suggested-by: Josh Coombs <josh.coombs@gmail.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Jason Cooper <jason@lakedaemon.net>
| | * | ARM: DMA-Mapping: print warning when atomic coherent allocation failsMarek Szyprowski2012-08-281-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Print a loud warning when system runs out of memory from atomic DMA coherent pool to let users notice the potential problem. Reported-by: Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
| | * | ARM: DMA-Mapping: add function for setting coherent pool size from platform codeMarek Szyprowski2012-08-282-1/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some platforms might require to increase atomic coherent pool to make sure that their device will be able to allocate all their buffers from atomic context. This function can be also used to decrease atomic coherent pool size if coherent allocations are not used for the given sub-platform. Suggested-by: Josh Coombs <josh.coombs@gmail.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
| | * | ARM: relax conditions required for enabling Contiguous Memory AllocatorMarek Szyprowski2012-08-281-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Contiguous Memory Allocator requires only paging and MMU enabled not particular CPU architectures, so there is no need for strict dependency on CPU type. This enables to use CMA on some older ARM v5 systems which also might need large contiguous blocks for the multimedia processing hw modules. Reported-by: Prabhakar Lad <prabhakar.lad@ti.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Tested-by: Prabhakar Lad <prabhakar.lad@ti.com>
| | * | mm: cma: fix alignment requirements for contiguous regionsMarek Szyprowski2012-08-281-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Contiguous Memory Allocator requires each of its regions to be aligned in such a way that it is possible to change migration type for all pageblocks holding it and then isolate page of largest possible order from the buddy allocator (which is MAX_ORDER-1). This patch relaxes alignment requirements by one order, because MAX_ORDER alignment is not really needed. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> CC: Michal Nazarewicz <mina86@mina86.com> Acked-by: Michal Nazarewicz <mina86@mina86.com>
| * | | Merge branch 'for-linus' of ↵Linus Torvalds2012-09-084-2/+23
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input Pull input subsystem updates from Dmitry Torokhov. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: wacom - add support for EMR on Cintiq 24HD touch Input: i8042 - add Gigabyte T1005 series netbooks to noloop table Input: imx_keypad - reset the hardware before enabling Input: edt-ft5x06 - fix build error when compiling wthout CONFIG_DEBUG_FS
| | * | | Input: wacom - add support for EMR on Cintiq 24HD touchJason Gerecke2012-08-211-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adds support for the EMR digitizer on the Cintiq 24HD touch. The EMR digitizer should work identically to that found on the Cintiq 24HD. The touch digitizer is a separate USB device similar to how we split apart some other devices. Signed-off-by: Jason Gerecke <killertofu@gmail.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
| | * | | Input: i8042 - add Gigabyte T1005 series netbooks to noloop tableDmitry Torokhov2012-08-211-0/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | They all define their chassis type as "Other" and therefore are not categorized as "laptops" by the driver, which tries to perform AUX IRQ delivery test which fails and causes touchpad not working. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=42620 Cc: stable@kernel.org Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
| | * | | Input: imx_keypad - reset the hardware before enablingMichael Grzeschik2012-08-211-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Ensure the hardware is correctly initialized before requesting the interrupt, otherwise if a key was already touched since power-on the kernel enters an interrupt loop. To fix this issue we clear pending interrupt sources. We also have to make sure clk is enabled while changing the keypad registers. Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
| | * | | Input: edt-ft5x06 - fix build error when compiling wthout CONFIG_DEBUG_FSGuenter Roeck2012-08-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes the following breakage: edt-ft5x06.c: In function edt_ft5x06_ts_remove: edt-ft5x06.c:846:14: error: struct edt_ft5x06_ts_data has no member named raw_buffer Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Simon Budig <simon.budig@kernelconcepts.de> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
| * | | | Merge branch 'upstream-fixes' of ↵Linus Torvalds2012-09-072-2/+6
| |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid Pull HID updates from Jiri Kosina: "It contains a fix for Eaton Ellipse MAX UPS from Alan Stern, performance improvement (not processing debug data if noone is interested), by Henrik Rydberg, and allowing tpkbd-driven devices to work even with generic driver in a crippled mode, by Andres Freund." * 'upstream-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: HID: tpkbd: work even if the new Lenovo Keyboard driver is not configured HID: Only dump input if someone is listening HID: add NOGET quirk for Eaton Ellipse MAX UPS
| | * | | | HID: tpkbd: work even if the new Lenovo Keyboard driver is not configuredAndres Freund2012-09-071-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | c1dcad2d32d0252e8a3023d20311b52a187ecda3 added a new driver configured by HID_LENOVO_TPKBD but made the hid_have_special_driver entry non-optional which lead to a recognized but non-working device if the new driver wasn't configured (which is the correct default). Signed-off-by: Andres Freund <andres@anarazel.de> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| | * | | | HID: Only dump input if someone is listeningHenrik Rydberg2012-09-021-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Going through the motions of printing the debug message information takes a long time; using the keyboard can lead to a 160 us irqsoff latency. This patch skips hid_dump_input() when there are no open handles, which brings latency down to 100 us. Signed-off-by: Henrik Rydberg <rydberg@euromail.se> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| | * | | | HID: add NOGET quirk for Eaton Ellipse MAX UPSAlan Stern2012-08-271-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch (as1603) adds a NOGET quirk for the Eaton Ellipse MAX UPS device. (The USB IDs were already present in hid-ids.h, apparently under a different name.) Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Reported-by: Laurent Bigonville <l.bigonville@edpnet.be> CC: <stable@vger.kernel.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * | | | | Merge tag 'stable/for-linus-3.6-rc4-tag' of ↵Linus Torvalds2012-09-064-7/+7
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen Pull Xen bug-fixes from Konrad Rzeszutek Wilk: * Fix for TLB flushing introduced in v3.6 * Fix Xen-SWIOTLB not using proper DMA mask - device had 64bit but in a 32-bit kernel we need to allocate for coherent pages from a 32-bit pool. * When trying to re-use P2M nodes we had a one-off error and triggered a BUG_ON check with specific CONFIG_ option. * When doing FLR in Xen-PCI-backend we would first do FLR then save the PCI configuration space. We needed to do it the other way around. * tag 'stable/for-linus-3.6-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen/pciback: Fix proper FLR steps. xen: Use correct masking in xen_swiotlb_alloc_coherent. xen: fix logical error in tlb flushing xen/p2m: Fix one-off error in checking the P2M tree directory.
| | * | | | | xen/pciback: Fix proper FLR steps.Konrad Rzeszutek Wilk2012-09-061-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we do FLR and save PCI config we did it in the wrong order. The end result was that if a PCI device was unbind from its driver, then binded to xen-pciback, and then back to its driver we would get: > lspci -s 04:00.0 04:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection 13:42:12 # 4 :~/ > echo "0000:04:00.0" > /sys/bus/pci/drivers/pciback/unbind > modprobe e1000e e1000e: Intel(R) PRO/1000 Network Driver - 2.0.0-k e1000e: Copyright(c) 1999 - 2012 Intel Corporation. e1000e 0000:04:00.0: Disabling ASPM L0s L1 e1000e 0000:04:00.0: enabling device (0000 -> 0002) xen: registering gsi 48 triggering 0 polarity 1 Already setup the GSI :48 e1000e 0000:04:00.0: Interrupt Throttling Rate (ints/sec) set to dynamic conservative mode e1000e: probe of 0000:04:00.0 failed with error -2 This fixes it by first saving the PCI configuration space, then doing the FLR. Reported-by: Ren, Yongjie <yongjie.ren@intel.com> Reported-and-Tested-by: Tobias Geiger <tobias.geiger@vido.info> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> CC: stable@vger.kernel.org
| | * | | | | xen: Use correct masking in xen_swiotlb_alloc_coherent.Ronny Hegewald2012-09-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When running 32-bit pvops-dom0 and a driver tries to allocate a coherent DMA-memory the xen swiotlb-implementation returned memory beyond 4GB. The underlaying reason is that if the supplied driver passes in a DMA_BIT_MASK(64) ( hwdev->coherent_dma_mask is set to 0xffffffffffffffff) our dma_mask will be u64 set to 0xffffffffffffffff even if we set it to DMA_BIT_MASK(32) previously. Meaning we do not reset the upper bits. By using the dma_alloc_coherent_mask function - it does the proper casting and we get 0xfffffffff. This caused not working sound on a system with 4 GB and a 64-bit compatible sound-card with sets the DMA-mask to 64bit. On bare-metal and the forward-ported xen-dom0 patches from OpenSuse a coherent DMA-memory is always allocated inside the 32-bit address-range by calling dma_alloc_coherent_mask. This patch adds the same functionality to xen swiotlb and is a rebase of the original patch from Ronny Hegewald which never got upstream b/c the underlaying reason was not understood until now. The original email with the original patch is in: http://old-list-archives.xen.org/archives/html/xen-devel/2010-02/msg00038.html the original thread from where the discussion started is in: http://old-list-archives.xen.org/archives/html/xen-devel/2010-01/msg00928.html Signed-off-by: Ronny Hegewald <ronny.hegewald@online.de> Signed-off-by: Stefano Panella <stefano.panella@citrix.com> Acked-By: David Vrabel <david.vrabel@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> CC: stable@vger.kernel.org
| | * | | | | xen: fix logical error in tlb flushingAlex Shi2012-09-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While TLB_FLUSH_ALL gets passed as 'end' argument to flush_tlb_others(), the Xen code was made to check its 'start' parameter. That may give a incorrect op.cmd to MMUEXT_INVLPG_MULTI instead of MMUEXT_TLB_FLUSH_MULTI. Then it causes some page can not be flushed from TLB. This patch fixed this issue. Reported-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Alex Shi <alex.shi@intel.com> Acked-by: Jan Beulich <jbeulich@suse.com> Tested-by: Yongjie Ren <yongjie.ren@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| | * | | | | Merge commit '4cb38750d49010ae72e718d46605ac9ba5a851b4' into ↵Konrad Rzeszutek Wilk2012-09-056055-141649/+334864
| | |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | stable/for-linus-3.6 * commit '4cb38750d49010ae72e718d46605ac9ba5a851b4': (6849 commits) bcma: fix invalid PMU chip control masks [libata] pata_cmd64x: whitespace cleanup libata-acpi: fix up for acpi_pm_device_sleep_state API sata_dwc_460ex: device tree may specify dma_channel ahci, trivial: fixed coding style issues related to braces ahci_platform: add hibernation callbacks libata-eh.c: local functions should not be exposed globally libata-transport.c: local functions should not be exposed globally sata_dwc_460ex: support hardreset ata: use module_pci_driver drivers/ata/pata_pcmcia.c: adjust suspicious bit operation pata_imx: Convert to clk_prepare_enable/clk_disable_unprepare ahci: Enable SB600 64bit DMA on MSI K9AGM2 (MS-7327) v2 [libata] Prevent interface errors with Seagate FreeAgent GoFlex drivers/acpi/glue: revert accidental license-related 6b66d95895c bits libata-acpi: add missing inlines in libata.h i2c-omap: Add support for I2C_M_STOP message flag i2c: Fall back to emulated SMBus if the operation isn't supported natively i2c: Add SCCB support i2c-tiny-usb: Add support for the Robofuzz OSIF USB/I2C converter ...
| | * | | | | | xen/p2m: Fix one-off error in checking the P2M tree directory.Konrad Rzeszutek Wilk2012-09-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We would traverse the full P2M top directory (from 0->MAX_DOMAIN_PAGES inclusive) when trying to figure out whether we can re-use some of the P2M middle leafs. Which meant that if the kernel was compiled with MAX_DOMAIN_PAGES=512 we would try to use the 512th entry. Fortunately for us the p2m_top_index has a check for this: BUG_ON(pfn >= MAX_P2M_PFN); which we hit and saw this: (XEN) domain_crash_sync called from entry.S (XEN) Domain 0 (vcpu#0) crashed on cpu#0: (XEN) ----[ Xen-4.1.2-OVM x86_64 debug=n Tainted: C ]---- (XEN) CPU: 0 (XEN) RIP: e033:[<ffffffff819cadeb>] (XEN) RFLAGS: 0000000000000212 EM: 1 CONTEXT: pv guest (XEN) rax: ffffffff81db5000 rbx: ffffffff81db4000 rcx: 0000000000000000 (XEN) rdx: 0000000000480211 rsi: 0000000000000000 rdi: ffffffff81db4000 (XEN) rbp: ffffffff81793db8 rsp: ffffffff81793d38 r8: 0000000008000000 (XEN) r9: 4000000000000000 r10: 0000000000000000 r11: ffffffff81db7000 (XEN) r12: 0000000000000ff8 r13: ffffffff81df1ff8 r14: ffffffff81db6000 (XEN) r15: 0000000000000ff8 cr0: 000000008005003b cr4: 00000000000026f0 (XEN) cr3: 0000000661795000 cr2: 0000000000000000 Fixes-Oracle-Bug: 14570662 CC: stable@vger.kernel.org # only for v3.5 Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-05 03:56:55 +0000