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* virtio: Revert "virtio: disable multiport console support."Amit Shah2010-05-192-41/+31
| | | | | | | | | | | | | | | This reverts commit b7a413015d2986edf020fba765c906cc9cbcbfc9. Multiport support was disabled for 2.6.34 because we wanted to introduce a new ABI and since we didn't have any released kernel with the older ABI and were out of the merge window, it didn't make sense keeping the older ABI around. Now we revert the patch disabling multiport and rework the ABI in the following patches. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* virtio: add_buf_gfpMichael S. Tsirkin2010-05-192-14/+28
| | | | | | | | Add an add_buf variant that gets gfp parameter. Use that to allocate indirect buffers. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* trans_virtio: use virtqueue_xxx wrappersMichael S. Tsirkin2010-05-191-3/+3
| | | | | | | Switch trans_virtio to new virtqueue_xxx wrappers. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* virtio-rng: use virtqueue_xxx wrappersMichael S. Tsirkin2010-05-191-3/+3
| | | | | | | Switch virtio-rng to new virtqueue_xxx wrappers. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* virtio_ring: remove a level of indirectionMichael S. Tsirkin2010-05-192-73/+34
| | | | | | | | | | | We have a single virtqueue_ops implementation, and it seems unlikely we'll get another one at this point. So let's remove an unnecessary level of indirection: it would be very easy to re-add it if another implementation surfaces. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* virtio_net: use virtqueue_xxx wrappersMichael S. Tsirkin2010-05-191-23/+23
| | | | | | | Switch virtio_net to new virtqueue_xxx wrappers. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* virtio_blk: use virtqueue_xxx wrappersMichael S. Tsirkin2010-05-191-3/+3
| | | | | | | Switch virtio_blk to new virtqueue_xxx wrappers. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* virtio_console: use virtqueue_xxx wrappersMichael S. Tsirkin2010-05-191-16/+16
| | | | | | | Switch virtio_console to new virtqueue_xxx wrappers. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* virtio_balloon: use virtqueue_xxx wrappersMichael S. Tsirkin2010-05-191-9/+8
| | | | | | | Switch virtio_balloon to new virtqueue_xxx wrappers. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* virtio: add virtqueue_ vq_ops wrappersMichael S. Tsirkin2010-05-191-0/+34
| | | | | | | Add inline functions that wrap vq->vq_ops-> calls Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* virtio_blk: remove multichar constant.Rusty Russell2010-05-191-1/+1
| | | | | | | drivers/block/virtio_blk.c:228:13: warning: multi-character character constant Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: john cooper <john.cooper@redhat.com>
* Add virtio disk identification ioctljohn cooper2010-05-191-0/+10
| | | | | | | | | | | | Return serial string to the guest application via ioctl driver call. Note this form of interface to the guest userland was the consensus when the prior version using the ATA_IDENTIFY came under dispute. Signed-off-by: john cooper <john.cooper@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Add virtio disk identification supportjohn cooper2010-05-192-0/+35
| | | | | | | Add virtio-blk device id (s/n) support via virtio request. Signed-off-by: john cooper <john.cooper@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Merge branch 'x86-uv-for-linus' of ↵Linus Torvalds2010-05-186-905/+1167
|\ | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, UV: uv_irq.c: Fix all sparse warnings x86, UV: Improve BAU performance and error recovery x86, UV: Delete unneeded boot messages x86, UV: Clean up UV headers for MMR definitions
| * x86, UV: uv_irq.c: Fix all sparse warningsRandy Dunlap2010-04-172-7/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix all sparse warnings in building uv_irq.c. arch/x86/kernel/uv_irq.c:46:17: warning: symbol 'uv_irq_chip' was not declared. Should it be static? arch/x86/kernel/uv_irq.c:143:50: error: no identifier for function argument arch/x86/kernel/uv_irq.c:162:13: error: typename in expression arch/x86/kernel/uv_irq.c:162:13: error: undefined identifier 'restrict' arch/x86/kernel/uv_irq.c:250:44: error: no identifier for function argument arch/x86/kernel/uv_irq.c:260:17: error: typename in expression arch/x86/kernel/uv_irq.c:260:17: error: undefined identifier 'restrict' arch/x86/kernel/uv_irq.c:233:50: warning: incorrect type in argument 3 (different signedness) arch/x86/kernel/uv_irq.c:233:50: expected int *pnode arch/x86/kernel/uv_irq.c:233:50: got unsigned int *<noident> arch/x86/include/asm/uv/uv_hub.h:318:44: warning: incorrect type in argument 2 (different address spaces) arch/x86/include/asm/uv/uv_hub.h:318:44: expected void volatile [noderef] <asn:2>*addr arch/x86/include/asm/uv/uv_hub.h:318:44: got unsigned long * Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Dimitri Sivanich <sivanich@sgi.com> Cc: Russ Anderson <rja@sgi.com> Cc: Robin Holt <holt@sgi.com> Cc: Mike Travis <travis@sgi.com> Cc: Cliff Wickman <cpw@sgi.com> Cc: Jack Steiner <steiner@sgi.com> LKML-Reference: <20100416175142.f4b59683.randy.dunlap@oracle.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86, UV: Improve BAU performance and error recoveryCliff Wickman2010-04-142-442/+1075
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - increase performance of the interrupt handler - release timed-out software acknowledge resources - recover from continuous-busy status due to a hardware issue - add a 'throttle' to keep a uvhub from sending more than a specified number of broadcasts concurrently (work around the hardware issue) - provide a 'nobau' boot command line option - rename 'pnode' and 'node' to 'uvhub' (the 'node' terminology is ambiguous) - add some new statistics about the scope of broadcasts, retries, the hardware issue and the 'throttle' - split off new function uv_bau_retry_msg() from uv_bau_process_message() per community coding style feedback. - simplify the argument list to uv_bau_process_message(), per community coding style feedback. Signed-off-by: Cliff Wickman <cpw@sgi.com> Cc: linux-mm@kvack.org Cc: Jack Steiner <steiner@sgi.com> Cc: Russ Anderson <rja@sgi.com> Cc: Mike Travis <travis@sgi.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> LKML-Reference: <E1O25Z4-0004Ur-PB@eag09.americas.sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86, UV: Delete unneeded boot messagesJack Steiner2010-03-171-3/+0
| | | | | | | | | | | | | | | | | | SGI:UV: Delete extra boot messages that describe the system topology. These messages are no longer useful. Signed-off-by: Jack Steiner <steiner@sgi.com> LKML-Reference: <20100317154038.GA29346@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86, UV: Clean up UV headers for MMR definitionsJack Steiner2010-03-112-453/+85
| | | | | | | | | | | | | | | | | | | | Update UV mmr definitions header file. Eliminate definitions no longer needed. Move 2 definitions from tlb_uv.c into the header file where they belong. Signed-off-by: Jack Steiner <steiner@sgi.com> LKML-Reference: <20100310204458.GA28835@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | Merge branch 'x86-txt-for-linus' of ↵Linus Torvalds2010-05-184-17/+37
|\ \ | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-txt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, tboot: Add support for S3 memory integrity protection
| * | x86, tboot: Add support for S3 memory integrity protectionShane Wang2010-03-194-17/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds support for S3 memory integrity protection within an Intel(R) TXT launched kernel, for all kernel and userspace memory. All RAM used by the kernel and userspace, as indicated by memory ranges of type E820_RAM and E820_RESERVED_KERN in the e820 table, will be integrity protected. The MAINTAINERS file is also updated to reflect the maintainers of the TXT-related code. All MACing is done in tboot, based on a complexity analysis and tradeoff. v3: Compared with v2, this patch adds a check of array size in tboot.c, and a note to specify which c/s of tboot supports this kind of MACing in intel_txt.txt. Signed-off-by: Shane Wang <shane.wang@intel.com> LKML-Reference: <4B973DDA.6050902@intel.com> Signed-off-by: Joseph Cihula <joseph.cihula@intel.com> Acked-by: Pavel Machek <pavel@ucw.cz> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* | | Merge branch 'x86-pat-for-linus' of ↵Linus Torvalds2010-05-188-244/+470
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-pat-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, pat: Update the page flags for memtype atomically instead of using memtype_lock x86, pat: In rbt_memtype_check_insert(), update new->type only if valid x86, pat: Migrate to rbtree only backend for pat memtype management x86, pat: Preparatory changes in pat.c for bigger rbtree change rbtree: Add support for augmented rbtrees
| * | | x86, pat: Update the page flags for memtype atomically instead of using ↵Robin Holt2010-04-232-27/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | memtype_lock While testing an application using the xpmem (out of kernel) driver, we noticed a significant page fault rate reduction of x86_64 with respect to ia64. For one test running with 32 cpus, one thread per cpu, it took 01:08 for each of the threads to vm_insert_pfn 2GB worth of pages. For the same test running on 256 cpus, one thread per cpu, it took 14:48 to vm_insert_pfn 2 GB worth of pages. The slowdown was tracked to lookup_memtype which acquires the spinlock memtype_lock. This heavily contended lock was slowing down vm_insert_pfn(). With the cmpxchg on page->flags method, both the 32 cpu and 256 cpu cases take approx 00:01.3 seconds to complete. Signed-off-by: Robin Holt <holt@sgi.com> LKML-Reference: <20100423153627.751194346@gulag1.americas.sgi.com> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@gmail.com> Cc: Rafael Wysocki <rjw@novell.com> Reviewed-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * | | x86, pat: In rbt_memtype_check_insert(), update new->type only if validPallipadi, Venkatesh2010-03-011-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | new->type should only change when there is a valid ret_type. Otherwise the requested type and return type should be same. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> LKML-Reference: <20100224214355.GA16431@linux-os.sc.intel.com> Tested-by: Jack Steiner <steiner@sgi.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * | | x86, pat: Migrate to rbtree only backend for pat memtype managementPallipadi, Venkatesh2010-02-184-205/+296
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move pat backend to fully rbtree based implementation from the existing rbtree and linked list hybrid. New rbtree based solution uses interval trees (augmented rbtrees) in order to store the PAT ranges. The new code seprates out the pat backend to pat_rbtree.c file, making is cleaner. The change also makes the PAT lookup, reserve and free operations more optimal, as we don't have to traverse linear linked list of few tens of entries in normal case. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> LKML-Reference: <20100210232607.GB11465@linux-os.sc.intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * | | x86, pat: Preparatory changes in pat.c for bigger rbtree changevenkatesh.pallipadi@intel.com2010-02-182-82/+116
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Minor changes in pat.c to cleanup code and make it smoother to introduce bigger rbtree only change in the following patch. The changes are cleaup only and should not have any functional impact. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> LKML-Reference: <20100210195909.792781000@intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * | | rbtree: Add support for augmented rbtreesPallipadi, Venkatesh2010-02-183-5/+106
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for augmented rbtrees in core rbtree code. This will be used in subsequent patches, in x86 PAT code, which needs interval trees to efficiently keep track of PAT ranges. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> LKML-Reference: <20100210232343.GA11465@linux-os.sc.intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* | | | Merge branch 'x86-mrst-for-linus' of ↵Linus Torvalds2010-05-183-2/+7
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-mrst-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, mrst: add nop functions to x86_init mpparse functions x86, mrst, pci: return 0 for non-present pci bars x86: Avoid check hlt for newer cpus
| * | | | x86, mrst: add nop functions to x86_init mpparse functionsJacob Pan2010-05-161-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Moorestown does not have BIOS provided MP tables, we can save some time by avoiding scaning of these tables. e.g. [ 0.000000] Scan SMP from c0000000 for 1024 bytes. [ 0.000000] Scan SMP from c009fc00 for 1024 bytes. [ 0.000000] Scan SMP from c00f0000 for 65536 bytes. [ 0.000000] Scan SMP from c00bfff0 for 1024 bytes. Searching EBDA with the base at 0x40E will also result in random pointer deferencing within 1MB. This can be a problem in Lincroft if the pointer hits VGA area and VGA mode is not enabled. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> LKML-Reference: <1273873281-17489-8-git-send-email-jacob.jun.pan@linux.intel.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | | | x86, mrst, pci: return 0 for non-present pci barsJacob Pan2010-05-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Moorestown PCI code has special handling of devices with fixed BARs. In case of BAR sizing writes, we need to update the fake PCI MMCFG space with real size decode value. When a BAR is not present, we need to return 0 instead of ~0. ~0 will be treated as device error per bugzilla 12006. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> LKML-Reference: <1273873281-17489-2-git-send-email-jacob.jun.pan@linux.intel.com> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | | | x86: Avoid check hlt for newer cpusJacob Pan2010-05-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Check hlt instruction was targeted for some older CPUs. It is an expensive operation in that it takes 4 ticks to break out the check. We can avoid such check completely for newer x86 cpus (family >= 5). [ hpa: corrected family > 5 to family >= 5 ] Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> LKML-Reference: <1273269585-14346-1-git-send-email-jacob.jun.pan@linux.intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* | | | | Merge branch 'x86-mm-for-linus' of ↵Linus Torvalds2010-05-181-0/+48
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86-64: Combine SRAT regions when possible
| * | | | | x86-64: Combine SRAT regions when possibleJan Beulich2010-04-281-0/+48
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ... i.e. when the hole between two regions isn't occupied by memory on another node. This reduces the memory->node table size, thus reducing cache footprint of lookups, which got increased significantly some time ago, and things go back to how they were before that change on the systems I looked at. Signed-off-by: Jan Beulich <jbeulich@novell.com> LKML-Reference: <4BCF3230020000780003B3CA@vpn.id2.novell.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* | | | | | Merge branch 'x86-microcode-for-linus' of ↵Linus Torvalds2010-05-182-8/+18
|\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86/microcode: Use nonseekable_open() x86: Improve Intel microcode loader performance
| * | | | | | x86/microcode: Use nonseekable_open()Arnd Bergmann2010-04-141-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | No need to seek on this file, so prevent it outright so we can avoid using default_llseek - removes one more BKL usage. Signed-off-by: Arnd Bergmann <arnd@arndb.de> [drop useless llseek = no_llseek and smp_lock.h inclusion] Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnd Bergmann <arnd@relay.de.ibm.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Dmitry Adamushko <dmitry.adamushko@gmail.com> LKML-Reference: <1270910781-8786-1-git-send-regression-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | | x86: Improve Intel microcode loader performanceDimitri Sivanich2010-03-111-6/+16
| | |_|_|_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We've noticed that on large SGI UV system configurations, running microcode.ctl can take very long periods of time. This is due to the large number of vmalloc/vfree calls made by the Intel generic_load_microcode() logic. By reusing allocated space, the following patch reduces the time to run microcode.ctl on a 1024 cpu system from approximately 80 seconds down to 1 or 2 seconds. Signed-off-by: Dimitri Sivanich <sivanich@sgi.com> Acked-by: Dmitry Adamushko <dmitry.adamushko@gmail.com> Cc: Avi Kivity <avi@redhat.com> Cc: Bill Davidsen <davidsen@tmr.com> LKML-Reference: <20100305174203.GA19638@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | | Merge branch 'core-hweight-for-linus' of ↵Linus Torvalds2010-05-1814-62/+188
|\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-hweight-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, hweight: Use a 32-bit popcnt for __arch_hweight32() arch, hweight: Fix compilation errors x86: Add optimized popcnt variants bitops: Optimize hweight() by making use of compile-time evaluation
| * | | | | | x86, hweight: Use a 32-bit popcnt for __arch_hweight32()H. Peter Anvin2010-05-171-4/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use a 32-bit popcnt instruction for __arch_hweight32(), even on x86-64. Even though the input register will *usually* be zero-extended due to the standard operation of the hardware, it isn't necessarily so if the input value was the result of truncating a 64-bit operation. Note: the POPCNT32 variant used on x86-64 has a technically unnecessary REX prefix to make it five bytes long, the same as a CALL instruction, therefore avoiding an unnecessary NOP. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: Borislav Petkov <borislav.petkov@amd.com> LKML-Reference: <alpine.LFD.2.00.1005171443060.4195@i5.linux-foundation.org>
| * | | | | | arch, hweight: Fix compilation errorsBorislav Petkov2010-05-042-4/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix function prototype visibility issues when compiling for non-x86 architectures. Tested with crosstool (ftp://ftp.kernel.org/pub/tools/crosstool/) with alpha, ia64 and sparc targets. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com> LKML-Reference: <20100503130736.GD26107@aftab> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * | | | | | x86: Add optimized popcnt variantsBorislav Petkov2010-04-068-18/+108
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for the hardware version of the Hamming weight function, popcnt, present in CPUs which advertize it under CPUID, Function 0x0000_0001_ECX[23]. On CPUs which don't support it, we fallback to the default lib/hweight.c sw versions. A synthetic benchmark comparing popcnt with __sw_hweight64 showed almost a 3x speedup on a F10h machine. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com> LKML-Reference: <20100318112015.GC11152@aftab> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * | | | | | bitops: Optimize hweight() by making use of compile-time evaluationPeter Zijlstra2010-04-068-58/+87
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rename the extisting runtime hweight() implementations to __arch_hweight(), rename the compile-time versions to __const_hweight() and then have hweight() pick between them. Suggested-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20100318111929.GB11152@aftab> Acked-by: H. Peter Anvin <hpa@zytor.com> LKML-Reference: <1265028224.24455.154.camel@laptop> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* | | | | | | Merge branch 'x86-irq-for-linus' of ↵Linus Torvalds2010-05-1810-169/+155
|\ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-irq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, acpi/irq: Define gsi_end when X86_IO_APIC is undefined x86, irq: Kill io_apic_renumber_irq x86, acpi/irq: Handle isa irqs that are not identity mapped to gsi's. x86, ioapic: Simplify probe_nr_irqs_gsi. x86, ioapic: Optimize pin_2_irq x86, ioapic: Move nr_ioapic_registers calculation to mp_register_ioapic. x86, ioapic: In mpparse use mp_register_ioapic x86, ioapic: Teach mp_register_ioapic to compute a global gsi_end x86, ioapic: Fix the types of gsi values x86, ioapic: Fix io_apic_redir_entries to return the number of entries. x86, ioapic: Only export mp_find_ioapic and mp_find_ioapic_pin in io_apic.h x86, acpi/irq: Generalize mp_config_acpi_legacy_irqs x86, acpi/irq: Fix acpi_sci_ioapic_setup so it has both bus_irq and gsi x86, acpi/irq: pci device dev->irq is an isa irq not a gsi x86, acpi/irq: Teach acpi_get_override_irq to take a gsi not an isa_irq x86, acpi/irq: Introduce apci_isa_irq_to_gsi
| * | | | | | | x86, acpi/irq: Define gsi_end when X86_IO_APIC is undefinedEric W. Biederman2010-05-061-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | My recent changes introducing a global gsi_end variable failed to take into account the case of using acpi on a system not built to support IO_APICs, causing the build to fail. Define gsi_end to 15 when CONFIG_X86_IO_APIC is not set to avoid compile errors. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <m1tyqm14la.fsf_-_@fess.ebiederm.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | | | x86, irq: Kill io_apic_renumber_irqEric W. Biederman2010-05-044-31/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that the generic irq layer is performing the exact same remapping as io_apic_renumber_irq we can kill this weird es7000 specific function. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> LKML-Reference: <1269936436-7039-15-git-send-email-ebiederm@xmission.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * | | | | | | x86, acpi/irq: Handle isa irqs that are not identity mapped to gsi's.Eric W. Biederman2010-05-042-6/+59
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ACPI irq source overrides are allowed for the 16 isa irqs and are allowed to map any gsi to any isa irq. A few motherboards have been seen to take advantage of this and put the isa irqs on the 2nd or 3rd ioapic. This causes some problems, most notably the fact that we can not use any gsi < 16. To correct this move the gsis that are not isa irqs and have a gsi number < 16 into the linux irq space just past gsi_end. This is what the es7000 platform is doing today. Moving only the low 16 gsis above the rest of the gsi's only penalizes weird platforms, leaving sane acpi implementations with a 1-1 mapping of gsis and irqs. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> LKML-Reference: <1269936436-7039-14-git-send-email-ebiederm@xmission.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * | | | | | | x86, ioapic: Simplify probe_nr_irqs_gsi.Eric W. Biederman2010-05-043-43/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the global gsi_end value now that all ioapics have valid gsi numbers instead of a combination of acpi_probe_gsi and walking all of the ioapics and couting their number of entries by hand if acpi_probe_gsi gave us an answer we did not like. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> LKML-Reference: <1269936436-7039-13-git-send-email-ebiederm@xmission.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * | | | | | | x86, ioapic: Optimize pin_2_irqEric W. Biederman2010-05-041-9/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that all ioapics have valid gsi_base values use this to accellerate pin_2_irq. In the case of acpi this also ensures that pin_2_irq will compute the same irq value for an ioapic pin as acpi will. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> LKML-Reference: <1269936436-7039-12-git-send-email-ebiederm@xmission.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * | | | | | | x86, ioapic: Move nr_ioapic_registers calculation to mp_register_ioapic.Eric W. Biederman2010-05-041-14/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that all ioapic registration happens in mp_register_ioapic we can move the calculation of nr_ioapic_registers there from enable_IO_APIC. The number of ioapic registers is already calucated in mp_register_ioapic so all that really needs to be done is to save the caluclated value in nr_ioapic_registers. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> LKML-Reference: <1269936436-7039-11-git-send-email-ebiederm@xmission.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * | | | | | | x86, ioapic: In mpparse use mp_register_ioapicEric W. Biederman2010-05-041-24/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Long ago MP_ioapic_info was the primary way of setting up our ioapic data structures and mp_register_ioapic was a compatibility shim for acpi code. Now the situation is reversed and and mp_register_ioapic is the primary way of setting up our ioapic data structures. Keep the setting up of ioapic data structures uniform by having mp_register_ioapic call mp_register_ioapic. This changes a few fields: - type: is now hardset to MP_IOAPIC but type had to bey MP_IOAPIC or MP_ioapic_info would not have been called. - flags: is now hard coded to MPC_APIC_USABLE. We require flags to contain at least MPC_APIC_USEBLE in MP_ioapic_info and we don't ever examine flags so dropping a few flags that might possibly exist that we have never used is harmless. - apicaddr: Unchanged - apicver: Read from the ioapic instead of using the cached hardware value in the MP table. The real hardware value will be more accurate. - apicid: Now verified to be unique and changed if it is not. If the BIOS got this right this is a noop. If the BIOS did not fixing things appears to be the better solution. This adds gsi_base and gsi_end values to our ioapics defined with the mpatable, which will make our lives simpler later since we can always assume gsi_base and gsi_end are valid. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> LKML-Reference: <1269936436-7039-10-git-send-email-ebiederm@xmission.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * | | | | | | x86, ioapic: Teach mp_register_ioapic to compute a global gsi_endEric W. Biederman2010-05-043-3/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add the global variable gsi_end and teach mp_register_ioapic to keep it uptodate as we add more ioapics into the system. ioapics can only be added early in boot so the code that runs later can treat gsi_end as a constant. Remove the have hacks in sfi.c to second guess mp_register_ioapic by keeping t's own running total of how many gsi's have been seen, and instead use the gsi_end. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> LKML-Reference: <1269936436-7039-9-git-send-email-ebiederm@xmission.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * | | | | | | x86, ioapic: Fix the types of gsi valuesEric W. Biederman2010-05-042-7/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patches fixes the types of gsi_base and gsi_end values in struct mp_ioapic_gsi, and the gsi parameter of mp_find_ioapic and mp_find_ioapic_pin A gsi is cannonically a u32, not an int. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> LKML-Reference: <1269936436-7039-8-git-send-email-ebiederm@xmission.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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