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* OProfile: enable IBS for AMD CPUsRobert Richter2008-07-26
| | | | | | | Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Cc: Barry Kasindorf <barry.kasindorf@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* OProfile: fix setup_ibs_files() function interfaceRobert Richter2008-07-26
| | | | | | | Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Cc: Barry Kasindorf <barry.kasindorf@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* OProfile: on_each_cpu(): kill unused retry parameterRobert Richter2008-07-26
| | | | | | | Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Cc: Barry Kasindorf <barry.kasindorf@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* OProfile: Fix build error in op_model_athlon.cRobert Richter2008-07-26
| | | | | | | Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Cc: Barry Kasindorf <barry.kasindorf@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* OProfile: change IBS interrupt initializationRobert Richter2008-07-26
| | | | | | | Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Cc: Barry Kasindorf <barry.kasindorf@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86/oprofile: separating the IBS handlerRobert Richter2008-07-26
| | | | | | | Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Cc: Barry Kasindorf <barry.kasindorf@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86/oprofile: add IBS support for AMD CPUs, model specific codeBarry Kasindorf2008-07-26
| | | | | | | | | | This patchset supports the new profiling hardware available in the latest AMD CPUs in the oProfile driver. Signed-off-by: Barry Kasindorf <barry.kasindorf@amd.com> Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86/oprofile: add IBS support for AMD CPUs, IBS buffer handling routinesBarry Kasindorf2008-07-26
| | | | | | | | | | This patchset supports the new profiling hardware available in the latest AMD CPUs in the oProfile driver. Signed-off-by: Barry Kasindorf <barry.kasindorf@amd.com> Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* OProfile: add IBS code macrosRobert Richter2008-07-26
| | | | | | | Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Cc: Barry Kasindorf <barry.kasindorf@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* OProfile: moving increment_tail() in buffer_sync.cRobert Richter2008-07-26
| | | | | | | Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Cc: Barry Kasindorf <barry.kasindorf@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* drivers/oprofile: coding style fixes in buffer_sync.cRobert Richter2008-07-26
| | | | | | | Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Cc: Barry Kasindorf <barry.kasindorf@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86/oprofile: renaming athlon_*() into op_amd_*()Robert Richter2008-07-26
| | | | | | | | | | These functions contain code for all AMD CPUs. The new names fit better. Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Cc: Barry Kasindorf <barry.kasindorf@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86/oprofile: Minor changes in op_model_athlon.cRobert Richter2008-07-26
| | | | | | | Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Cc: Barry Kasindorf <barry.kasindorf@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86/oprofile: introduce model specific init/exit functionsRobert Richter2008-07-26
| | | | | | | | | | | | | This patch implements model specific OProfile init/exit functions for x86 CPUs. Though there is more rework needed at the initialization code, this new introduced functions allow it to keep model specific code in the corresponding op_model_*.c files. The function interface is the same as for oprofile_arch_init/exit(). Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* oprofile: Add support for AMD Family 11hBarry Kasindorf2008-07-26
| | | | | | | | | This patch add support for AMD Family 11h CPUs. Signed-off-by: Barry Kasindorf <barry.kasindorf@amd.com> Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: apic_*.c: add description to AMD's extended LVT functionsRobert Richter2008-07-26
| | | | | | | Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Cc: Barry Kasindorf <barry.kasindorf@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: add PCI IDs for AMD Barcelona PCI devicesRobert Richter2008-07-26
| | | | | | | Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: oprofile-list <oprofile-list@lists.sourceforge.net> Cc: Barry Kasindorf <barry.kasindorf@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86_64: fix ia32 AMD syscall audit fast-pathRoland McGrath2008-07-25
| | | | | | | | | | The new code in commit 5cbf1565f29eb57a86a305b08836613508e294d7 has a bug in the version supporting the AMD 'syscall' instruction. It clobbers the user's %ecx register value (with the %ebp value). This change fixes it. Signed-off-by: Roland McGrath <roland@redhat.com>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds2008-07-25
|\ | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: ipsec: ipcomp - Decompress into frags if necessary ipsec: ipcomp - Merge IPComp implementations pkt_sched: Fix locking in shutdown_scheduler_queue()
| * ipsec: ipcomp - Decompress into frags if necessaryHerbert Xu2008-07-25
| | | | | | | | | | | | | | | | | | When decompressing extremely large packets allocating them through kmalloc is prone to failure. Therefore it's better to use page frags instead. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
| * ipsec: ipcomp - Merge IPComp implementationsHerbert Xu2008-07-25
| | | | | | | | | | | | | | | | | | This patch merges the IPv4/IPv6 IPComp implementations since most of the code is identical. As a result future enhancements will no longer need to be duplicated. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
| * pkt_sched: Fix locking in shutdown_scheduler_queue()David S. Miller2008-07-25
| | | | | | | | | | | | | | Qdisc locks need to be held with BH disabled. Tested-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: David S. Miller <davem@davemloft.net>
* | MFD_TC6393XB is ARM-onlyAdrian Bunk2008-07-25
| | | | | | | | | | | | | | | | | | | | | | | | | | Compile error on other architectures: CC drivers/mfd/tc6393xb.o /home/bunk/linux/kernel-2.6/git/linux-2.6/drivers/mfd/tc6393xb.c: In function ‘tc6393xb_attach_irq’: /home/bunk/linux/kernel-2.6/git/linux-2.6/drivers/mfd/tc6393xb.c:324: error: implicit declaration of function ‘set_irq_flags’ ... Reported-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge branch 'merge' of ↵Linus Torvalds2008-07-25
|\ \ | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: powerpc: Fix boot problem due to AT_BASE_PLATFORM change
| * | powerpc: Fix boot problem due to AT_BASE_PLATFORM changeNathan Lynch2008-07-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 9115d13453dee22473a1e8cacc90a8d64a9c4bc9 ("powerpc: Enable AT_BASE_PLATFORM aux vector") broke boot on 32-bit powerpc systems; we have to use PTRRELOC to initialize powerpc_base_platform this early in boot. Bug reported by Jon Smirl. Signed-off-by: Nathan Lynch <ntl@pobox.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2008-07-25
|\ \ \ | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: sparc: Wire up new system calls.
| * | | sparc: Wire up new system calls.David S. Miller2008-07-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This wires up the recently added Wire up signalfd4, eventfd2, epoll_create1, dup3, pipe2, and inotify_init1 system calls. Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | Merge branch 'release' of ↵Linus Torvalds2008-07-25
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] Wire up new system calls
| * | | | [IA64] Wire up new system callsTony Luck2008-07-25
| |/ / / | | | | | | | | | | | | | | | | | | | | | | | | Six new system calls: signalfd4, eventfd2, epoll_create1, dup3, pipe2 and inotify_init1. Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | | sys_paccept definition missing __user annotationHarvey Harrison2008-07-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduced by commit aaca0bdca573f3f51ea03139f9c7289541e7bca3 ("flag parameters: paccept"): net/socket.c:1515:17: error: symbol 'sys_paccept' redeclared with different type (originally declared at include/linux/syscalls.h:413) - incompatible argument 4 (different address spaces) Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | Merge git://git.infradead.org/embedded-2.6Linus Torvalds2008-07-25
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | * git://git.infradead.org/embedded-2.6: Make console charset translation optional
| * | | | Make console charset translation optionalDavid Woodhouse2008-06-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | By turning off the new CONSOLE_TRANSLATIONS option and dropping the associated code and tables from the kernel, we can save about 7KiB. Taken from linux-tiny project by Tim Bird and mangled further by dwmw2. Signed-off-by: Tim Bird <tim.bird@am.sony.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* | | | | Merge git://git.infradead.org/~dwmw2/random-2.6Linus Torvalds2008-07-25
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.infradead.org/~dwmw2/random-2.6: remove dummy asm/kvm.h files firmware: create firmware binaries during 'make modules'.
| * | | | | remove dummy asm/kvm.h filesAdrian Bunk2008-07-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes the dummy asm/kvm.h files on architectures not (yet) supporting KVM and uses the same conditional headers installation as already used for a.out.h . Also removed are superfluous install rules in the s390 and x86 Kbuild files (they are already in Kbuild.asm). Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * | | | | firmware: create firmware binaries during 'make modules'.David Woodhouse2008-07-25
| | |/ / / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | This means that we no longer need write access to the source tree while doing 'make modules_install'. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* | | | | bootmem: Move node allocation macros back to !HAVE_ARCH_BOOTMEM_NODEJohannes Weiner2008-07-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | These got unintentionally moved, put them back as x86 provides its own versions. Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | signalfd: fix undefined reference to `compat_sys_signalfd4' when ↵Ingo Molnar2008-07-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | !CONFIG_SIGNALFD fix: arch/x86/ia32/built-in.o: In function `ia32_sys_call_table': (.rodata+0xa38): undefined reference to `compat_sys_signalfd4' on !CONFIG_SIGNALFD. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | mm/hugetlb.c: fix build failure with !CONFIG_SYSCTLIngo Molnar2008-07-25
| |_|/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | on !CONFIG_SYSCTL on x86 with latest -git i get: mm/hugetlb.c: In function 'decrement_hugepage_resv_vma': mm/hugetlb.c:83: error: 'reserve' undeclared (first use in this function) mm/hugetlb.c:83: error: (Each undeclared identifier is reported only once mm/hugetlb.c:83: error: for each function it appears in.) Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | Merge branch 'merge' of ↵Linus Torvalds2008-07-25
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (34 commits) powerpc: Wireup new syscalls Move update_mmu_cache() declaration from tlbflush.h to pgtable.h powerpc/pseries: Remove kmalloc call in handling writes to lparcfg powerpc/pseries: Update arch vector to indicate support for CMO ibmvfc: Add support for collaborative memory overcommit ibmvscsi: driver enablement for CMO ibmveth: enable driver for CMO ibmveth: Automatically enable larger rx buffer pools for larger mtu powerpc/pseries: Verify CMO memory entitlement updates with virtual I/O powerpc/pseries: vio bus support for CMO powerpc/pseries: iommu enablement for CMO powerpc/pseries: Add CMO paging statistics powerpc/pseries: Add collaborative memory manager powerpc/pseries: Utilities to set firmware page state powerpc/pseries: Enable CMO feature during platform setup powerpc/pseries: Split retrieval of processor entitlement data into a helper routine powerpc/pseries: Add memory entitlement capabilities to /proc/ppc64/lparcfg powerpc/pseries: Split processor entitlement retrieval and gathering to helper routines powerpc/pseries: Remove extraneous error reporting for hcall failures in lparcfg powerpc: Fix compile error with binutils 2.15 ... Fixed up conflict in arch/powerpc/platforms/52xx/Kconfig manually.
| * | | | powerpc: Wireup new syscallsTony Breeds2008-07-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | signalfd4, eventfd2, epoll_create1, dup3, pipe2 and inotify_init1 Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | | | Move update_mmu_cache() declaration from tlbflush.h to pgtable.hBenjamin Herrenschmidt2008-07-25
| | | | | | | | | | | | | | | | | | | | | | | | | where it belongs. This fixes some build problems on some configs Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | | | powerpc/pseries: Remove kmalloc call in handling writes to lparcfgNathan Fontenot2008-07-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are only 4 valid name=value pairs for writes to /proc/ppc64/lparcfg. Current code allocates a buffer to copy this information in from the user. Since the longest name=value pair will easily fit into a buffer of 64 characters, simply put the buffer on the stack instead of allocating the buffer. Signed-off-by: Nathan Fotenot <nfont@austin.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | | | powerpc/pseries: Update arch vector to indicate support for CMONathan Fontenot2008-07-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Update the architecture vector to indicate that Cooperative Memory Overcommitment is supported if CONFIG_PPC_SMLPAR is set. Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | | | ibmvfc: Add support for collaborative memory overcommitBrian King2008-07-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adds support to the ibmvfc driver for collaborative memory overcommit. Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | | | ibmvscsi: driver enablement for CMORobert Jennings2008-07-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Enable the driver to function in a Cooperative Memory Overcommitment (CMO) environment. The following changes are made to enable the driver for CMO: * DMA mapping errors will not result in error messages if entitlement has been exceeded and resources were not available. * The driver has a get_desired_dma function defined to function in a CMO environment. It will indicate how much IO memory it would like to function. Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Acked by: Brian King <brking@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Acked-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | | | ibmveth: enable driver for CMORobert Jennings2008-07-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Enable ibmveth for Cooperative Memory Overcommitment (CMO). For this driver it means calculating a desired amount of IO memory based on the current MTU and updating this value with the bus when MTU changes occur. Because DMA mappings can fail, we have added a bounce buffer for temporary cases where the driver can not map IO memory for the buffer pool. The following changes are made to enable the driver for CMO: * DMA mapping errors will not result in error messages if entitlement has been exceeded and resources were not available. * DMA mapping errors are handled gracefully, ibmveth_replenish_buffer_pool() is corrected to check the return from dma_map_single and fail gracefully. * The driver will have a get_desired_dma function defined to function in a CMO environment. * When the MTU is changed, the driver will update the device IO entitlement Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Santiago Leon <santil@us.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | | | ibmveth: Automatically enable larger rx buffer pools for larger mtuSantiago Leon2008-07-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Activates larger rx buffer pools when the MTU is changed to a larger value. This patch de-activates the large rx buffer pools when the MTU changes to a smaller value. Signed-off-by: Santiago Leon <santil@us.ibm.com> Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | | | powerpc/pseries: Verify CMO memory entitlement updates with virtual I/ONathan Fontenot2008-07-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Verify memory entitlement updates can be handled by vio. Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | | | powerpc/pseries: vio bus support for CMORobert Jennings2008-07-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a large patch but the normal code path is not affected. For non-pSeries platforms the code is ifdef'ed out and for non-CMO enabled pSeries systems this does not affect the normal code path. Devices that do not perform DMA operations do not need modification with this patch. The function get_desired_dma was renamed from get_io_entitlement for clarity. Overview Cooperative Memory Overcommitment (CMO) allows for a set of OS partitions to be run with less RAM than the aggregate needs of the group of partitions. The firmware will balance memory between the partitions and page in/out memory as needed. Based on the number and type of IO adpaters preset each partition is allocated an amount of memory for DMA operations and this allocation will be guaranteed to the partition; this is referred to as the partition's 'entitlement'. Partitions running in a CMO environment can only have virtual IO devices present. The VIO bus layer will manage the IO entitlement for the system. Accounting, at a system and per-device level, is tracked in the VIO bus code and exposed via sysfs. A set of dma_ops functions are added to the bus to allow for this accounting. Bus initialization At initialization, the bus will calculate the minimum needs of the system based on providing each device present with a standard minimum entitlement along with a spare allocation for the bus to handle hotplug events. If the minimum needs can not be met the system boot will be halted. Device changes The significant changes for devices while running under CMO are that the devices must specify how much dedicated IO entitlement they desire and must also handle DMA mapping errors that can occur due to constrained IO memory. The virtual IO drivers are modified to silence errors when DMA mappings fail for CMO and handle these failures gracefully. Each devices will be guaranteed a minimum entitlement that can always be mapped. Devices will specify how much entitlement they desire and the VIO bus will attempt to provide for this. Devices can change their desired entitlement level at any point in time to address particular needs (via vio_cmo_set_dev_desired()), not just at device probe time. VIO bus changes The system will have a particular entitlement level available from which it can provide memory to the devices. The bus defines two pools of memory within this entitlement, the reserved and excess pools. Each device is provided with it's own entitlement no less than a system defined minimum entitlement and no greater than what the device has specified as it's desired entitlement. The entitlement provided to devices comes from the reserve pool. The reserve pool can also contain a spare allocation as large as the system defined minimum entitlement which is used for device hotplug events. Any entitlement not needed to fulfill the needs of a reserve pool is placed in the excess pool. Each device is guaranteed that it can map up to it's entitled level; additional mapping are possible as long as there is unmapped memory in the excess pool. Bus probe As the system starts, each device is given an entitlement equal only to the system defined minimum entitlement. The reserve pool is equal to the sum of these entitlements, plus a spare allocation. The VIO bus also tracks the aggregate desired entitlement of all the devices. If the system desired entitlement is greater than the size of the reserve pool, when devices unmap IO memory it will be reserved and a balance operation will be scheduled for some time in the future. Entitlement balancing The balance function tries to fairly distribute entitlement between the devices in the system with the goal of providing each device with it's desired amount of entitlement. Devices using more than what would be ideal will have their entitled set-point adjusted; this will effectively set a goal for lower IO memory usage as future mappings can fail and deallocations will trigger a balance operation to distribute the newly unmapped memory. A fair distribution of entitlement can take several balance operations to achieve. Entitlement changes and device DLPAR events will alter the state of CMO and will trigger balance operations. Hotplug events The VIO bus allows for changes in system entitlement at run-time via 'vio_cmo_entitlement_update()'. When devices are added the hotplug device event will be preceded by a system entitlement increase and this is reversed when devices are removed. The following changes are made that the VIO bus layer for CMO: * add IO memory accounting per device structure. * add IO memory entitlement query function to driver structure. * during vio bus probe, if CMO is enabled, check that driver has memory entitlement query function defined. Fail if function not defined. * fail to register driver if io entitlement function not defined. * create set of dma_ops at vio level for CMO that will track allocations and return DMA failures once entitlement is reached. Entitlement will limited by overall system entitlement. Devices will have a reserved quantity of memory that is guaranteed, the rest can be used as available. * expose entitlement, current allocation, desired allocation, and the allocation error counter for devices to the user through sysfs * provide mechanism for changing a device's desired entitlement at run time for devices as an exported function and sysfs tunable * track any DMA failures for entitled IO memory for each vio device. * check entitlement against available system entitlement on device add * track entitlement metrics (high water mark, current usage) * provide function to reset high water mark * provide minimum and desired entitlement numbers at a bus level * provide drivers with a minimum guaranteed entitlement * balance available entitlement between devices to satisfy their needs * handle system entitlement changes and device hotplug Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | | | powerpc/pseries: iommu enablement for CMORobert Jennings2008-07-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To support Cooperative Memory Overcommitment (CMO), we need to check for failure from some of the tce hcalls. These changes for the pseries platform affect the powerpc architecture; patches for the other affected platforms are included in this patch. pSeries platform IOMMU code changes: * platform TCE functions must handle H_NOT_ENOUGH_RESOURCES errors and return an error. Architecture IOMMU code changes: * Calls to ppc_md.tce_build need to check return values and return DMA_MAPPING_ERROR for transient errors. Architecture changes: * struct machdep_calls for tce_build*_pSeriesLP functions need to change to indicate failure. * all other platforms will need updates to iommu functions to match the new calling semantics; they will return 0 on success. The other platforms default configs have been built, but no further testing was performed. Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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