- 30 Jan, 2008 40 commits
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Rusty Russell authored
Move kvm_create_lapic() into kvm_vcpu_init(), rather than having svm and vmx do it. And make it return the error rather than a fairly random -ENOMEM. This also solves the problem that neither svm.c nor vmx.c actually handles the error path properly. Signed-off-by:
Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
Avi Kivity <avi@qumranet.com>
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Rusty Russell authored
Instead of the asymetry of kvm_free_apic, implement kvm_free_lapic(). And guess what? I found a minor bug: we don't need to hrtimer_cancel() from kvm_main.c, because we do that in kvm_free_apic(). Also: 1) kvm_vcpu_uninit should be the reverse order from kvm_vcpu_init. 2) Don't set apic->regs_page to zero before freeing apic. Signed-off-by:
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Izik Eidus authored
The user is now able to set how many mmu pages will be allocated to the guest. Signed-off-by:
Izik Eidus <izike@qumranet.com> Signed-off-by:
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Izik Eidus authored
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Izik Eidus authored
When kvm uses user-allocated pages in the future for the guest, we won't be able to use page->private for rmap, since page->rmap is reserved for the filesystem. So we move the rmap base pointers to the memory slot. A side effect of this is that we need to store the gfn of each gpte in the shadow pages, since the memory slot is addressed by gfn, instead of hfn like struct page. Signed-off-by:
Izik Eidus <izik@qumranet.com> Signed-off-by:
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Avi Kivity authored
Now that smp_call_function_single() knows how to call a function on the current cpu, there's no need to check explicitly. Signed-off-by: -
Avi Kivity authored
Noted by Eddie Dong. Signed-off-by: -
Laurent Vivier authored
This patch modifies the management of REX prefix according behavior I saw in Xen 3.1. In Xen, this modification has been introduced by Jan Beulich. http://lists.xensource.com/archives/html/xen-changelog/2007-01/msg00081.htmlSigned-off-by:
Laurent Vivier <Laurent.Vivier@bull.net> Signed-off-by:
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Laurent Vivier authored
The only valid case is on protected page access, other cases are errors. Signed-off-by:
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Qing He authored
Signed-off-by:
Qing He <qing.he@intel.com> Signed-off-by:
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Laurent Vivier authored
Remove no_wb, use dst.type = OP_NONE instead, idea stollen from xen-3.1 Signed-off-by:
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Laurent Vivier authored
Remove _eflags and use directly ctxt->eflags. Caching eflags is not needed as it is restored to vcpu by kvm_main.c:emulate_instruction() from ctxt->eflags only if emulation doesn't fail. Signed-off-by:
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Laurent Vivier authored
To improve readability, move push, writeback, and grp 1a/2/3/4/5/9 emulation parts into functions. Signed-off-by:
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Ryan Harper authored
This patch removes the fault injected when the guest attempts to set reserved bits in cr3. X86 hardware doesn't generate a fault when setting reserved bits. The result of this patch is that vmware-server, running within a kvm guest, boots and runs memtest from an iso. Signed-off-by:
Ryan Harper <ryanh@us.ibm.com> Signed-off-by:
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Avi Kivity authored
When we allow guest page faults to reach the guests directly, we lose the fault tracking which allows us to detect demand paging. So we provide an alternate mechnism by clearing the accessed bit when we set a pte, and checking it later to see if the guest actually used it. Signed-off-by: -
Avi Kivity authored
There are two classes of page faults trapped by kvm: - host page faults, where the fault is needed to allow kvm to install the shadow pte or update the guest accessed and dirty bits - guest page faults, where the guest has faulted and kvm simply injects the fault back into the guest to handle The second class, guest page faults, is pure overhead. We can eliminate some of it on vmx using the following evil trick: - when we set up a shadow page table entry, if the corresponding guest pte is not present, set up the shadow pte as not present - if the guest pte _is_ present, mark the shadow pte as present but also set one of the reserved bits in the shadow pte - tell the vmx hardware not to trap faults which have the present bit clear With this, normal page-not-present faults go directly to the guest, bypassing kvm entirely. Unfortunately, this trick only works on Intel hardware, as AMD lacks a way to discriminate among page faults based on error code. It is also a little risky since it uses reserved bits which might become unreserved in the future, so a module parameter is provided to disable it. Signed-off-by: -
Avi Kivity authored
KVM avoids reloading the efer msr when the difference between the guest and host values consist of the long mode bits (which are switched by hardware) and the NX bit (which is emulated by the KVM MMU). This patch also allows KVM to ignore SCE (syscall enable) when the guest is running in 32-bit mode. This is because the syscall instruction is not available in 32-bit mode on Intel processors, so the SCE bit is effectively meaningless. Signed-off-by: -
Laurent Vivier authored
Move emulate_ctxt to kvm_vcpu to keep emulate context when we exit from kvm module. Call x86_decode_insn() only when needed. Modify x86_emulate_insn() to not modify the context if it must be re-entered. Signed-off-by:
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Laurent Vivier authored
emulate_instruction() calls now x86_decode_insn() and x86_emulate_insn(). x86_emulate_insn() is x86_emulate_memop() without the decoding part. Signed-off-by:
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Laurent Vivier authored
Split the decoding process into a new function x86_decode_insn(). Signed-off-by:
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Laurent Vivier authored
Move all x86_emulate_memop() common variables between decode and execute to a structure decode_cache. This will help in later separating decode and emulate. struct decode_cache { u8 twobyte; u8 b; u8 lock_prefix; u8 rep_prefix; u8 op_bytes; u8 ad_bytes; struct operand src; struct operand dst; unsigned long *override_base; unsigned int d; unsigned long regs[NR_VCPU_REGS]; unsigned long eip; /* modrm */ u8 modrm; u8 modrm_mod; u8 modrm_reg; u8 modrm_rm; u8 use_modrm_ea; unsigned long modrm_ea; unsigned long modrm_val; }; Signed-off-by: -
Laurent Vivier authored
Remove #ifdef functions never used Signed-off-by:
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Anthony Liguori authored
This patch refactors the current hypercall infrastructure to better support live migration and SMP. It eliminates the hypercall page by trapping the UD exception that would occur if you used the wrong hypercall instruction for the underlying architecture and replacing it with the right one lazily. A fall-out of this patch is that the unhandled hypercalls no longer trap to userspace. There is very little reason though to use a hypercall to communicate with userspace as PIO or MMIO can be used. There is no code in tree that uses userspace hypercalls. [avi: fix #ud injection on vmx] Signed-off-by:
Anthony Liguori <aliguori@us.ibm.com> Signed-off-by:
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Anthony Liguori authored
Add vmmcall/vmcall to x86_emulate. Future patch will implement functionality for these instructions. Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86: (890 commits) x86: fix nodemap_size according to nodeid bits x86: fix overlap between pagetable with bss section x86: add PCI IDs to k8topology_64.c x86: fix early_ioremap pagetable ops x86: use the same pgd_list for PAE and 64-bit x86: defer cr3 reload when doing pud_clear() x86: early boot debugging via FireWire (ohci1394_dma=early) x86: don't special-case pmd allocations as much x86: shrink some ifdefs in fault.c x86: ignore spurious faults x86: remove nx_enabled from fault.c x86: unify fault_32|64.c x86: unify fault_32|64.c with ifdefs x86: unify fault_32|64.c by ifdef'd function bodies x86: arch/x86/mm/init_32.c printk fixes x86: arch/x86/mm/init_32.c cleanup x86: arch/x86/mm/init_64.c printk fixes x86: unify ioremap x86: fixes some bugs about EFI memory map handling x86: use reboot_type on EFI 32 ...
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Linus Torvalds authored
Both the old e1000 driver and the new e1000e driver can drive some PCI-Express e1000 cards, and we should avoid ambiguity about which driver will pick up the support for those cards when both drivers are enabled. This solves the problem by having the old driver support those cards if the new driver isn't configured, but otherwise ceding support for PCI Express versions of the e1000 chipset to the newer driver. Thus allowing both legacy configurations where only the old driver is active (and handles all chips it knows about) and the new configuration with the new driver handling the more modern PCIE variants. Acked-by:
Jeff Garzik <jeff@garzik.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Linus Torvalds authored
We want IPV6HEADER matching for the non-advanced default netfilter configuration, since it's part of the standard netfilter setup of at least some distributions (eg Fedora). Otherwise NETFILTER_ADVANCED loses much of its point, since even non-advanced users would have to enable all the advanced options just to get a working IPv6 netfilter setup. Signed-off-by: -
Yinghai Lu authored
memnode.map is s16 array because of nodeid is 16 bit now. so need to increase the nodemap_size according to that bits. Signed-off-by:
Yinghai Lu <yinghai.lu@sun.com> Signed-off-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Yinghai Lu authored
one early crash on one 8 node 256g machine: Command line: console=uart8250,io,0x3f8,115200n8 initrd=kernel.org/mydisk11_x86_64.gz rw root=/dev/ram0 debug initcall_debug apic=debug acpi.debug_level=0x0000000f pci=routeirq ip=dhcp load_ramdisk=1 ramdisk_size=131072 BOOT_IMAGE=kernel.org/bzImage_2.6.25_k8.1 BIOS-provided physical RAM map: BIOS-e820: 0000000000000000 - 000000000009bc00 (usable) BIOS-e820: 000000000009bc00 - 00000000000a0000 (reserved) BIOS-e820: 00000000000e6000 - 0000000000100000 (reserved) BIOS-e820: 0000000000100000 - 00000000dffe0000 (usable) BIOS-e820: 00000000dffe0000 - 00000000dffee000 (ACPI data) BIOS-e820: 00000000dffee000 - 00000000dffff050 (ACPI NVS) BIOS-e820: 00000000dffff050 - 00000000e0000000 (reserved) BIOS-e820: 00000000fec00000 - 00000000fec01000 (reserved) BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved) BIOS-e820: 00000000ff700000 - 0000000100000000 (reserved) BIOS-e820: 0000000100000000 - 0000004020000000 (usable) Early serial console at I/O port 0x3f8 (options '115200n8') console [uart0] enabled end_pfn_map = 67239936 Kernel panic - not syncing: Duplicated early reservation d40000-e42000 Pid: 0, comm: swapper Not tainted 2.6.24-smp-g5a514e21-dirty #3 Call Trace: [<ffffffff80221545>] lapic_get_maxlvt+0x0/0x10 [<ffffffff80221657>] clear_local_APIC+0x5/0xcf [<ffffffff80221726>] disable_local_APIC+0x5/0x17 [<ffffffff8021fe16>] smp_send_stop+0x46/0x4c [<ffffffff80235293>] panic+0x94/0x13e [<ffffffff80bc3b03>] sctp_eps_proc_init+0x12/0x34 [<ffffffff80b9f1c5>] reserve_early+0x30/0x6c [<ffffffff80803925>] init_memory_mapping+0x2cd/0x2dc [<ffffffff80b9dc01>] setup_arch+0x21f/0x44e [<ffffffff80b978be>] start_kernel+0x6f/0x2c7 [<ffffffff80b971cc>] _sinittext+0x1cc/0x1d3 it turns out there is overlap between pgtable and bss... 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 need to round up table_start to PAGE_SIZE. also make the panic more informative. Signed-off-by:
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Joachim Deguara authored
This just adds the PCI IDs of AMD's family 10h and 11h CPU's northbridges to k8topology discovery. Signed-off-by:
Joachim Deguara <joachim.deguara@amd.com> Signed-off-by:
Andi Kleen <ak@suse.de> Acked-by:
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Jeremy Fitzhardinge authored
Put appropriate pagetable update hooks in so that paravirt knows what's going on in there. Signed-off-by:
Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by:
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Jeremy Fitzhardinge authored
Use a standard list threaded through page->lru for maintaining the pgd list on PAE. This is the same as 64-bit, and seems saner than using a non-standard list via page->index. Signed-off-by:
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Jeremy Fitzhardinge authored
PAE mode requires that we reload cr3 in order to guarantee that changes to the pgd will be noticed by the processor. This means that in principle pud_clear needs to reload cr3 every time. However, because reloading cr3 implies a tlb flush, we want to avoid it where possible. pud_clear() is only used in a couple of places: - in free_pmd_range(), when pulling down a range of process address space, and - huge_pmd_unshare() In both cases, the calling code will do a a tlb flush anyway, so there's no need to do it within pud_clear(). In free_pmd_range(), the pud_clear is immediately followed by pmd_free_tlb(); we can hook that to make the mmu_gather do an unconditional full flush to make sure cr3 gets reloaded. In huge_pmd_unshare, it is followed by flush_tlb_range, which always results in a full cr3-reload tlb flush. Signed-off-by:
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Bernhard Kaindl authored
This patch adds a new configuration option, which adds support for a new early_param which gets checked in arch/x86/kernel/setup_{32,64}.c:setup_arch() to decide wether OHCI-1394 FireWire controllers should be initialized and enabled for physical DMA access to allow remote debugging of early problems like issues ACPI or other subsystems which are executed very early. If the config option is not enabled, no code is changed, and if the boot paramenter is not given, no new code is executed, and independent of that, all new code is freed after boot, so the config option can be even enabled in standard, non-debug kernels. With specialized tools, it is then possible to get debugging information from machines which have no serial ports (notebooks) such as the printk buffer contents, or any data which can be referenced from global pointers, if it is stored below the 4GB limit and even memory dumps of of the physical RAM region below the 4GB limit can be taken without any cooperation from the CPU of the host, so the machine can be crashed early, it does not matter. In the extreme, even kernel debuggers can be accessed in this way. I wrote a small kgdb module and an accompanying gdb stub for FireWire which allows to gdb to talk to kgdb using remote remory reads and writes over FireWire. An version of the gdb stub fore FireWire is able to read all global data from a system which is running a a normal kernel without any kernel debugger, without any interruption or support of the system's CPU. That way, e.g. the task struct and so on can be read and even manipulated when the physical DMA access is granted. A HOWTO is included in this patch, in Documentation/debugging-via-ohci1394.txt and I've put a copy online at ftp://ftp.suse.de/private/bk/firewire/docs/debugging-via-ohci1394.txt It also has links to all the tools which are available to make use of it another copy of it is online at: ftp://ftp.suse.de/private/bk/firewire/kernel/ohci1394_dma_early-v2.diffSigned-Off-By:Bernhard Kaindl <bk@suse.de> Tested-By:
Thomas Renninger <trenn@suse.de> Signed-off-by:
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Jeremy Fitzhardinge authored
In x86 PAE mode, stop treating pmds as a special case. Previously they were always allocated and freed with the pgd. The modifies the code to be the same as 64-bit mode, where they are allocated on demand. This is a step on the way to unifying 32/64-bit pagetable allocation as much as possible. There is a complicating wart, however. When you install a new reference to a pmd in the pgd, the processor isn't guaranteed to see it unless you reload cr3. Since reloading cr3 also has the side-effect of flushing the tlb, this is an expense that we want to avoid whereever possible. This patch simply avoids reloading cr3 unless the update is to the current pagetable. Later patches will optimise this further. Signed-off-by:
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Harvey Harrison authored
The change from current to tsk in do_page_fault is safe as this is set at the very beginning of the function. Removes a likely() annotation from the 64-bit version, this could have instead been added to 32-bit. Signed-off-by:
Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by:
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Jeremy Fitzhardinge authored
When changing a kernel page from RO->RW, it's OK to leave stale TLB entries around, since doing a global flush is expensive and they pose no security problem. They can, however, generate a spurious fault, which we should catch and simply return from (which will have the side-effect of reloading the TLB to the current PTE). This can occur when running under Xen, because it frequently changes kernel pages from RW->RO->RW to implement Xen's pagetable semantics. It could also occur when using CONFIG_DEBUG_PAGEALLOC, since it avoids doing a global TLB flush after changing page permissions. Signed-off-by:
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Harvey Harrison authored
On !PAE 32-bit, _PAGE_NX will be 0, making is_prefetch always return early. The test is sufficient on PAE as __supported_pte_mask is updated in the same places as nx_enabled in init_32.c which also takes disable_nx into account. Signed-off-by:
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Harvey Harrison authored
Unify includes in moved fault.c. Modify Makefiles to pick up unified file. Signed-off-by:
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Harvey Harrison authored
Elimination of these ifdefs can be done in a unified file. Signed-off-by:
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