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2008-02-01Suspend: Clean up suspend_64.cBorislav Petkov
There's a freakishly long comment in suspend_64.c, shorten it. Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-01Suspend: Clean up Kconfig (V2)Johannes Berg
This cleans up the suspend Kconfig and removes the need to declare centrally which architectures support suspend. All architectures that currently support suspend are modified accordingly. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Russell King <rmk@arm.linux.org.uk> Acked-by: Paul Mackerras <paulus@samba.org> Acked-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Paul Mundt <lethal@linux-sh.org> Cc: Pavel Machek <pavel@suse.cz> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-01Hibernation: Clean up Kconfig (V2)Johannes Berg
This cleans up the hibernation Kconfig and removes the need to declare centrally which architectures support hibernation. All architectures that currently support hibernation are modified accordingly. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Paul Mackerras <paulus@samba.org> Cc: Pavel Machek <pavel@suse.cz> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-02x86: fix bootup crash in native_read_tsc()Ingo Molnar
fix bootup crash in native_read_tsc() that was reported on an Athlon-XP and bisected. The correct feature boundary for X86_FEATURE_MFENCE_RDTSC is not XMM but XMM2. Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-02Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86: x86: avoid section mismatch involving arch_register_cpu x86: fixes for lookup_address args x86: fix sparse warnings in cpu/common.c x86: make early_console static in early_printk.c x86: remove unneeded round_up x86: fix section mismatch warning in kernel/pci-calgary x86: fix section mismatch warning in acpi/boot.c x86: fix section mismatch warnings when referencing notifiers x86: silence section mismatch warning in smpboot_64.c x86: fix comments in vmlinux_64.lds x86_64: make bootmap_start page align v6 x86_64: add debug name for early_res
2008-02-01x86: avoid section mismatch involving arch_register_cpuAlexander van Heukelum
Avoid section mismatch involving arch_register_cpu. Marking arch_register_cpu as __init and removing the export for non-hotplug-cpu configurations makes the following warning go away: Section mismatch in reference from the function arch_register_cpu() to the function .devinit.text:register_cpu() The function arch_register_cpu() references the function __devinit register_cpu(). This is often because arch_register_cpu lacks a __devinit annotation or the annotation of register_cpu is wrong. The only external user of arch_register_cpu in the tree is in drivers/acpi/processor_core.c where it is guarded by ACPI_HOTPLUG_CPU (which depends on HOTPLUG_CPU). Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> CC: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-01x86: fixes for lookup_address argsHarvey Harrison
Signedness mismatches in level argument. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-01x86: fix sparse warnings in cpu/common.cHarvey Harrison
The casts will always be needed, may as well make them the right signedness. The ebx variables can easily be unsigned, may as well. arch/x86/kernel/cpu/common.c:261:21: warning: incorrect type in argument 2 (different signedness) arch/x86/kernel/cpu/common.c:261:21: expected unsigned int *eax arch/x86/kernel/cpu/common.c:261:21: got int *<noident> arch/x86/kernel/cpu/common.c:262:9: warning: incorrect type in argument 3 (different signedness) arch/x86/kernel/cpu/common.c:262:9: expected unsigned int *ebx arch/x86/kernel/cpu/common.c:262:9: got int *<noident> arch/x86/kernel/cpu/common.c:263:9: warning: incorrect type in argument 4 (different signedness) arch/x86/kernel/cpu/common.c:263:9: expected unsigned int *ecx arch/x86/kernel/cpu/common.c:263:9: got int *<noident> arch/x86/kernel/cpu/common.c:264:9: warning: incorrect type in argument 5 (different signedness) arch/x86/kernel/cpu/common.c:264:9: expected unsigned int *edx arch/x86/kernel/cpu/common.c:264:9: got int *<noident> arch/x86/kernel/cpu/common.c:293:30: warning: incorrect type in argument 3 (different signedness) arch/x86/kernel/cpu/common.c:293:30: expected unsigned int *ebx arch/x86/kernel/cpu/common.c:293:30: got int *<noident> arch/x86/kernel/cpu/common.c:350:22: warning: incorrect type in argument 2 (different signedness) arch/x86/kernel/cpu/common.c:350:22: expected unsigned int *eax arch/x86/kernel/cpu/common.c:350:22: got int *<noident> arch/x86/kernel/cpu/common.c:351:10: warning: incorrect type in argument 3 (different signedness) arch/x86/kernel/cpu/common.c:351:10: expected unsigned int *ebx arch/x86/kernel/cpu/common.c:351:10: got int *<noident> arch/x86/kernel/cpu/common.c:352:10: warning: incorrect type in argument 4 (different signedness) arch/x86/kernel/cpu/common.c:352:10: expected unsigned int *ecx arch/x86/kernel/cpu/common.c:352:10: got int *<noident> arch/x86/kernel/cpu/common.c:353:10: warning: incorrect type in argument 5 (different signedness) arch/x86/kernel/cpu/common.c:353:10: expected unsigned int *edx arch/x86/kernel/cpu/common.c:353:10: got int *<noident> arch/x86/kernel/cpu/common.c:362:30: warning: incorrect type in argument 3 (different signedness) arch/x86/kernel/cpu/common.c:362:30: expected unsigned int *ebx arch/x86/kernel/cpu/common.c:362:30: got int *<noident> Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-01x86: make early_console static in early_printk.cHarvey Harrison
Not necessary to expose it, also fixes sparse warning. arch/x86/kernel/early_printk.c:196:16: warning: symbol 'early_console' was not declared. Should it be static? Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-01x86: remove unneeded round_upYinghai Lu
Signed-off-by: Yinghai Lu <yinghai.lu@sun.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-01x86: fix section mismatch warning in kernel/pci-calgarySam Ravnborg
Fix following warning: WARNING: arch/x86/kernel/built-in.o(.text+0x1eb41): Section mismatch in reference from the function calgary_handle_quirks() to the function .init.text:calgary_set_split_completion_timeout() calgary_handle_quirks() are only called at __init time (in calgary_init_one() via handle_quirks ops). So annotate this function and the sister function __init. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-01x86: fix section mismatch warning in acpi/boot.cSam Ravnborg
Fix following warning: WARNING: o-x86_64/arch/x86/kernel/built-in.o(.text+0x13d15): Section mismatch in reference from the function acpi_map_lsapic() to the function .cpuinit.text:mp_register_lapic() The function acpi_map_lsapic() is exported and thus not annotated. But the sole user is acpi/processor_core.c in a __cpuinit path. So create a small wrapper and put back the annotation thus avoiding the warning. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-01x86: fix section mismatch warnings when referencing notifiersSam Ravnborg
Fix the following warnings: WARNING: arch/x86/kernel/built-in.o(.exit.text+0xf8): Section mismatch in reference from the function msr_exit() to the variable .cpuinit.data:msr_class_cpu_notifier WARNING: arch/x86/kernel/built-in.o(.exit.text+0x158): Section mismatch in reference from the function cpuid_exit() to the variable .cpuinit.data:cpuid_class_cpu_notifier WARNING: arch/x86/kernel/built-in.o(.exit.text+0x171): Section mismatch in reference from the function microcode_exit() to the variable .cpuinit.data:mc_cpu_notifier In all three cases there were a function annotated __exit that referenced a variable annotated __cpuinitdata. The fix was to replace the annotation of the notifier with __refdata to tell modpost that the reference to a _cpuinit function in the notifier are OK. The unregister call that references the notifier variable will simple delete the function pointer so there is no problem ignoring the reference. Note: This looks like another case where __cpuinit has been used as replacement for proper use of CONFIG_HOTPLUG_CPU to decide what code are used for HOTPLUG_CPU. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-01x86: silence section mismatch warning in smpboot_64.cSam Ravnborg
Silence the following warning: WARNING: o-x86_64/arch/x86/kernel/built-in.o(.text+0x17cd3): Section mismatch in reference from the function remove_cpu_from_maps() to the variable .cpuinit.data:cpu_initialized remove_cpu:maps() had a single user: __cpu_disable() so mark it static and annotate it with __ref to silence the warning from modpost. _cpu_disable() has a single user in kernel/cpu.c: => take_cpu_down() which again has a single user in the following call: => __stop_machine_run(take_cpu_down, &tcd_param, cpu); Here a kthread is created. So maybe the warning is correct and the right fix is to remove the __cpuinitdata annotation of cpu_initialized? Note: The analysis were disturbed by the fact that we had a variable with the same name in cpu/common.c - but this is 32 bit only] Note: Should smpboot_64 use cpu_clear()? Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-01x86: fix comments in vmlinux_64.ldsYinghai Lu
for bzImage, the vmlinux_64.lds still have s32 bit code, and startup_32 should be 0. fix the comment. Signed-off-by: Yinghai Lu <yinghai.lu@sun.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-01x86_64: make bootmap_start page align v6Yinghai Lu
boot oopses when a system has 64 or 128 GB of RAM installed: Calling initcall 0xffffffff80bc33b6: sctp_init+0x0/0x711() BUG: unable to handle kernel NULL pointer dereference at 000000000000005f IP: [<ffffffff802bfe55>] proc_register+0xe7/0x10f PGD 0 Oops: 0000 [1] SMP CPU 0 Modules linked in: Pid: 1, comm: swapper Not tainted 2.6.24-smp-g5a514e21-dirty #6 RIP: 0010:[<ffffffff802bfe55>] [<ffffffff802bfe55>] proc_register+0xe7/0x10f RSP: 0000:ffff810824c57e60 EFLAGS: 00010246 RAX: 000000000000d7d7 RBX: ffff811024c5fa80 RCX: ffff810824c57e08 RDX: 0000000000000000 RSI: 0000000000000195 RDI: ffffffff80cc2460 RBP: ffffffffffffffff R08: 0000000000000000 R09: ffff811024c5fa80 R10: 0000000000000000 R11: 0000000000000002 R12: ffff810824c57e6c R13: 0000000000000000 R14: ffff810824c57ee0 R15: 00000006abd25bee FS: 0000000000000000(0000) GS:ffffffff80b4d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b CR2: 000000000000005f CR3: 0000000000201000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process swapper (pid: 1, threadinfo ffff810824c56000, task ffff812024c52000) Stack: ffffffff80a57348 0000019500000000 ffff811024c5fa80 0000000000000000 00000000ffffff97 ffffffff802bfef0 0000000000000000 ffffffffffffffff 0000000000000000 ffffffff80bc3b4b ffff810824c57ee0 ffffffff80bc34a5 Call Trace: [<ffffffff802bfef0>] ? create_proc_entry+0x73/0x8a [<ffffffff80bc3b4b>] ? sctp_snmp_proc_init+0x1c/0x34 [<ffffffff80bc34a5>] ? sctp_init+0xef/0x711 [<ffffffff80b976e3>] ? kernel_init+0x175/0x2e1 [<ffffffff8020ccf8>] ? child_rip+0xa/0x12 [<ffffffff80b9756e>] ? kernel_init+0x0/0x2e1 [<ffffffff8020ccee>] ? child_rip+0x0/0x12 Code: 1e 48 83 7b 38 00 75 08 48 c7 43 38 f0 e8 82 80 48 83 7b 30 00 75 08 48 c7 43 30 d0 e9 82 80 48 c7 c7 60 24 cc 80 e8 bd 5a 54 00 <48> 8b 45 60 48 89 6b 58 48 89 5d 60 48 89 43 50 fe 05 f5 25 a0 RIP [<ffffffff802bfe55>] proc_register+0xe7/0x10f RSP <ffff810824c57e60> CR2: 000000000000005f ---[ end trace 02c2d78def82877a ]--- Kernel panic - not syncing: Attempted to kill init! it turns out some variables near end of bss are corrupted already. in System.map we have ffffffff80d40420 b rsi_table ffffffff80d40620 B krb5_seq_lock ffffffff80d40628 b i.20437 ffffffff80d40630 b xprt_rdma_inline_write_padding ffffffff80d40638 b sunrpc_table_header ffffffff80d40640 b zero ffffffff80d40644 b min_memreg ffffffff80d40648 b rpcrdma_tk_lock_g ffffffff80d40650 B sctp_assocs_id_lock ffffffff80d40658 B proc_net_sctp ffffffff80d40660 B sctp_assocs_id ffffffff80d40680 B sysctl_sctp_mem ffffffff80d40690 B sysctl_sctp_rmem ffffffff80d406a0 B sysctl_sctp_wmem ffffffff80d406b0 b sctp_ctl_socket ffffffff80d406b8 b sctp_pf_inet6_specific ffffffff80d406c0 b sctp_pf_inet_specific ffffffff80d406c8 b sctp_af_v4_specific ffffffff80d406d0 b sctp_af_v6_specific ffffffff80d406d8 b sctp_rand.33270 ffffffff80d406dc b sctp_memory_pressure ffffffff80d406e0 b sctp_sockets_allocated ffffffff80d406e4 b sctp_memory_allocated ffffffff80d406e8 b sctp_sysctl_header ffffffff80d406f0 b zero ffffffff80d406f4 A __bss_stop ffffffff80d406f4 A _end and setup_node_bootmem() will use that page 0xd40000 for bootmap Bootmem setup node 0 0000000000000000-0000000828000000 NODE_DATA [000000000008a485 - 0000000000091484] bootmap [0000000000d406f4 - 0000000000e456f3] pages 105 Bootmem setup node 1 0000000828000000-0000001028000000 NODE_DATA [0000000828000000 - 0000000828006fff] bootmap [0000000828007000 - 0000000828106fff] pages 100 Bootmem setup node 2 0000001028000000-0000001828000000 NODE_DATA [0000001028000000 - 0000001028006fff] bootmap [0000001028007000 - 0000001028106fff] pages 100 Bootmem setup node 3 0000001828000000-0000002028000000 NODE_DATA [0000001828000000 - 0000001828006fff] bootmap [0000001828007000 - 0000001828106fff] pages 100 setup_node_bootmem() makes NODE_DATA cacheline aligned, and bootmap is page-aligned. the patch updates find_e820_area() to make sure we can meet the alignment constraints. Signed-off-by: Yinghai Lu <yinghai.lu@sun.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-01x86_64: add debug name for early_resYinghai Lu
helps debugging problems in this rather murky area of code. Signed-off-by: Yinghai Lu <yinghai.lu@sun.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-01latencytop: Change Kconfig dependency.Heiko Carstens
Change latencytop Kconfig entry so it doesn't list the archictectures that support it. Instead introduce HAVE_LATENCY_SUPPORT which any architecture can set. Should reduce patch conflicts. Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Holger Wolf <wolf@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-01fix directory entry in arch-x86-MakefileSteven Rostedt
Doing a make randconfig I came across this error in the Makefile. This patch makes a directory out of arch/x86/mach-default for CONFIG_X86_RDC321X Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-01-31x86: uninline __pte_free_tlb() and __pmd_free_tlb()Ingo Molnar
this also removes an include file dependency. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-31x86: fix small sparse warningHarvey Harrison
arch/x86/kernel/ds.c:226:9: warning: Using plain integer as NULL pointer Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-31x86: fix sparse warning in kernel/scx200_32.cHarvey Harrison
arch/x86/kernel/scx200_32.c:68:72: warning: Using plain integer as NULL pointer Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-31x86: early_ioremap_reset fix 2Huang, Ying
This patch fixes a bug of early_ioremap_reset(), which had been fixed before by "convert the boot time page table to the kernels native format" patch. But that patch has been reverted now. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-31x86: c_p_a clflush_cache_range fixHuang, Ying
Because in i386 early boot stage, boot_cpu_data may be not available, which makes clflush_cach_range() into infinite loop, which is called by change_page_attr(). This patch fixes this by setting boot_cpu_data.x86_clflush_size in early_cpu_detect(). Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-31x86: change_page_attr_clear fixHuang, Ying
This patch replaces __change_page_attr_set_clr() with change_page_attr_set_clr() in change_page_attr_clear() to flush the TLB/cache properly. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-31x86: fix sparse warnings in intel_cacheinfo.cHarvey Harrison
arch/x86/kernel/cpu/intel_cacheinfo.c:355:7: warning: symbol 'i' shadows an earlier one arch/x86/kernel/cpu/intel_cacheinfo.c:296:39: originally declared here arch/x86/kernel/cpu/intel_cacheinfo.c:367:18: warning: incorrect type in argument 2 (different signedness) arch/x86/kernel/cpu/intel_cacheinfo.c:367:18: expected unsigned int *eax arch/x86/kernel/cpu/intel_cacheinfo.c:367:18: got int * arch/x86/kernel/cpu/intel_cacheinfo.c:367:28: warning: incorrect type in argument 3 (different signedness) arch/x86/kernel/cpu/intel_cacheinfo.c:367:28: expected unsigned int *ebx arch/x86/kernel/cpu/intel_cacheinfo.c:367:28: got int * arch/x86/kernel/cpu/intel_cacheinfo.c:367:38: warning: incorrect type in argument 4 (different signedness) arch/x86/kernel/cpu/intel_cacheinfo.c:367:38: expected unsigned int *ecx arch/x86/kernel/cpu/intel_cacheinfo.c:367:38: got int * arch/x86/kernel/cpu/intel_cacheinfo.c:367:48: warning: incorrect type in argument 5 (different signedness) arch/x86/kernel/cpu/intel_cacheinfo.c:367:48: expected unsigned int *edx arch/x86/kernel/cpu/intel_cacheinfo.c:367:48: got int * Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-31Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86: alpha: fix x86.git merge build error ia64: on UP percpu variables are not small memory model x86: fix arch/x86/kernel/test_nx.c modular build bug s390: use generic percpu linux-2.6.git POWERPC: use generic per cpu ia64: use generic percpu SPARC64: use generic percpu percpu: change Kconfig to HAVE_SETUP_PER_CPU_AREA modules: fold percpu_modcopy into module.c x86: export copy_from_user_ll_nocache[_nozero] x86: fix duplicated TIF on 64-bit
2008-01-31Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linusLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: (27 commits) lguest: use __PAGE_KERNEL instead of _PAGE_KERNEL lguest: Use explicit includes rateher than indirect lguest: get rid of lg variable assignments lguest: change gpte_addr header lguest: move changed bitmap to lg_cpu lguest: move last_pages to lg_cpu lguest: change last_guest to last_cpu lguest: change spte_addr header lguest: per-vcpu lguest pgdir management lguest: make pending notifications per-vcpu lguest: makes special fields be per-vcpu lguest: per-vcpu lguest task management lguest: replace lguest_arch with lg_cpu_arch. lguest: make registers per-vcpu lguest: make emulate_insn receive a vcpu struct. lguest: map_switcher_in_guest() per-vcpu lguest: per-vcpu interrupt processing. lguest: per-vcpu lguest timers lguest: make hypercalls use the vcpu struct lguest: make write() operation smp aware ... Manual conflict resolved (maybe even correctly, who knows) in drivers/lguest/x86/core.c
2008-01-30x86: fix arch/x86/kernel/test_nx.c modular build bugIngo Molnar
fix this modular build bug: > CC [M] arch/x86/kernel/test_nx.o > {standard input}: Assembler messages: > {standard input}:58: Error: cannot represent relocation type BFD_RELOC_64 > {standard input}:59: Error: cannot represent relocation type BFD_RELOC_64 > make[2]: *** [arch/x86/kernel/test_nx.o] Error 1 > make[1]: *** [arch/x86/kernel] Error 2 Reported-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30x86: export copy_from_user_ll_nocache[_nozero]Andrew Morton
Cc: Neil Brown <neilb@cse.unsw.edu.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30KVM: Move apic timer migration away from critical sectionAvi Kivity
Migrating the apic timer in the critical section is not very nice, and is absolutely horrible with the real-time port. Move migration to the regular vcpu execution path, triggered by a new bitflag. Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Fix unbounded preemption latencyAvi Kivity
When preparing to enter the guest, if an interrupt comes in while preemption is disabled but interrupts are still enabled, we miss a preemption point. Fix by explicitly checking whether we need to reschedule. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Initialize the mmu caches only after verifying cpu supportAvi Kivity
Otherwise we re-initialize the mmu caches, which will fail since the caches are already registered, which will cause us to deinitialize said caches. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: MMU: Fix dirty page setting for pages removed from rmapIzik Eidus
Right now rmap_remove won't set the page as dirty if the shadow pte pointed to this page had write access and then it became readonly. This patches fixes that, by setting the page as dirty for spte changes from write to readonly access. Signed-off-by: Izik Eidus <izike@qumranet.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: x86 emulator: Only allow VMCALL/VMMCALL trapped by #UDSheng Yang
When executing a test program called "crashme", we found the KVM guest cannot survive more than ten seconds, then encounterd kernel panic. The basic concept of "crashme" is generating random assembly code and trying to execute it. After some fixes on emulator insn validity judgment, we found it's hard to get the current emulator handle the invalid instructions correctly, for the #UD trap for hypercall patching caused troubles. The problem is, if the opcode itself was OK, but combination of opcode and modrm_reg was invalid, and one operand of the opcode was memory (SrcMem or DstMem), the emulator will fetch the memory operand first rather than checking the validity, and may encounter an error there. For example, ".byte 0xfe, 0x34, 0xcd" has this problem. In the patch, we simply check that if the invalid opcode wasn't vmcall/vmmcall, then return from emulate_instruction() and inject a #UD to guest. With the patch, the guest had been running for more than 12 hours. Signed-off-by: Feng (Eric) Liu <eric.e.liu@intel.com> Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: MMU: Merge shadow level check in FNAME(fetch)Dong, Eddie
Remove the redundant level check when fetching shadow pte for present & non-present spte. Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: MMU: Move kvm_free_some_pages() into critical sectionAvi Kivity
If some other cpu steals mmu pages between our check and an attempt to allocate, we can run out of mmu pages. Fix by moving the check into the same critical section as the allocation. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: MMU: Switch to mmu spinlockMarcelo Tosatti
Convert the synchronization of the shadow handling to a separate mmu_lock spinlock. Also guard fetch() by mmap_sem in read-mode to protect against alias and memslot changes. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: MMU: Avoid calling gfn_to_page() in mmu_set_spte()Avi Kivity
Since gfn_to_page() is a sleeping function, and we want to make the core mmu spinlocked, we need to pass the page from the walker context (which can sleep) to the shadow context (which cannot). [marcelo: avoid recursive locking of mmap_sem] Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Add kvm_read_guest_atomic()Marcelo Tosatti
In preparation for a mmu spinlock, add kvm_read_guest_atomic() and use it in fetch() and prefetch_page(). Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: MMU: Concurrent guest walkersMarcelo Tosatti
Do not hold kvm->lock mutex across the entire pagefault code, only acquire it in places where it is necessary, such as mmu hash list, active list, rmap and parent pte handling. Allow concurrent guest walkers by switching walk_addr() to use mmap_sem in read-mode. And get rid of the lockless __gfn_to_page. [avi: move kvm_mmu_pte_write() locking inside the function] [avi: add locking for real mode] [avi: fix cmpxchg locking] Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Disable vapic support on Intel machines with FlexPriorityAvi Kivity
FlexPriority accelerates the tpr without any patching. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Accelerated apic supportAvi Kivity
This adds a mechanism for exposing the virtual apic tpr to the guest, and a protocol for letting the guest update the tpr without causing a vmexit if conditions allow (e.g. there is no interrupt pending with a higher priority than the new tpr). Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: local APIC TPR access reporting facilityAvi Kivity
Add a facility to report on accesses to the local apic tpr even if the local apic is emulated in the kernel. This is basically a hack that allows userspace to patch Windows which tends to bang on the tpr a lot. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Print data for unimplemented wrmsrAvi Kivity
This can help diagnosing what the guest is trying to do. In many cases we can get away with partial emulation of msrs. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: MMU: Add cache miss statisticAvi Kivity
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: MMU: Coalesce remote tlb flushesEddie Dong
Host side TLB flush can be merged together if multiple spte need to be write-protected. Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Move kvm_vcpu_kick() to x86.cZhang Xiantao
Moving kvm_vcpu_kick() to x86.c. Since it should be common for all archs, put its declarations in <linux/kvm_host.h> Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Move ioapic code to common directory.Zhang Xiantao
Move ioapic code to common, since IA64 also needs it. Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Move irqchip declarations into new ioapic.h and lapic.hZhang Xiantao
This allows reuse of ioapic in ia64. Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
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