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* Lguest support for VirtioRusty Russell2007-10-235-28/+421
| | | | | | | | | | | | | | | | | | This makes lguest able to use the virtio devices. We change the device descriptor page from a simple array to a variable length "type, config_len, status, config data..." format, and implement virtio_config_ops to read from that config data. We use the virtio ring implementation for an efficient Guest <-> Host virtqueue mechanism, and the new LHCALL_NOTIFY hypercall to kick the host when it changes. We also use LHCALL_NOTIFY on kernel addresses for very very early console output. We could have another hypercall, but this hack works quite well. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Remove old lguest I/O infrrasructure.Rusty Russell2007-10-238-752/+21
| | | | | | | | | | | This patch gets rid of the old lguest host I/O infrastructure and replaces it with a single hypercall "LHCALL_NOTIFY" which takes an address. The main change is the removal of io.c: that mainly did inter-guest I/O, which virtio doesn't yet support. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Remove old lguest bus and drivers.Rusty Russell2007-10-2313-1503/+0
| | | | | | | This gets rid of the lguest bus, drivers and DMA mechanism, to make way for a generic virtio mechanism. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Virtio helper routines for a descriptor ringbuffer implementationRusty Russell2007-10-235-0/+439
| | | | | | | | | | | | | | | | | | | | These helper routines supply most of the virtqueue_ops for hypervisors which want to use a ring for virtio. Unlike the previous lguest implementation: 1) The rings are variable sized (2^n-1 elements). 2) They have an unfortunate limit of 65535 bytes per sg element. 3) The page numbers are always 64 bit (PAE anyone?) 4) They no longer place used[] on a separate page, just a separate cacheline. 5) We do a modulo on a variable. We could be tricky if we cared. 6) Interrupts and notifies are suppressed using flags within the rings. Users need only get the ring pages and provide a notify hook (KVM wants the guest to allocate the rings, lguest does it sanely). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Dor Laor <dor.laor@qumranet.com>
* Module autoprobing support for virtio drivers.Rusty Russell2007-10-232-0/+36
| | | | | | | This adds the logic to convert the virtio ids into module aliases, and includes a modalias entry in sysfs and the env var to make probing work. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Virtio console driverRusty Russell2007-10-234-0/+242
| | | | | | | | | | This is an hvc-based virtio console driver. It's suboptimal becuase hvc expects to have raw access to interrupts and virtio doesn't assume that, so it currently polls. There are two solutions: expose hvc's "kick" interface, or wean off hvc. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Block driver using virtio.Rusty Russell2007-10-235-0/+367
| | | | | | | | | | | | | | | | | | | | The block driver uses scatter-gather lists with sg[0] being the request information (struct virtio_blk_outhdr) with the type, sector and inbuf id. The next N sg entries are the bio itself, then the last sg is the status byte. Whether the N entries are in or out depends on whether it's a read or a write. We accept the normal (SCSI) ioctls: they get handed through to the other side which can then handle it or reply that it's unsupported. It's not clear that this actually works in general, since I don't know if blk_pc_request() requests have an accurate rq_data_dir(). Although we try to reply -ENOTTY on unsupported commands, ioctl(fd, CDROMEJECT) returns success to userspace. This needs a separate patch. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <jens.axboe@oracle.com>
* Net driver using virtioRusty Russell2007-10-235-0/+479
| | | | | | | | | | | | | | | | The network driver uses two virtqueues: one for input packets and one for output packets. This has nice locking properties (ie. we don't do any for recv vs send). TODO: 1) Big packets. 2) Multi-client devices (maybe separate driver?). 3) Resolve freeing of old xmit skbs (Christian Borntraeger) Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: netdev@vger.kernel.org
* Virtio interfaceRusty Russell2007-10-2310-0/+419
| | | | | | | | | | | | | | | | This attempts to implement a "virtual I/O" layer which should allow common drivers to be efficiently used across most virtual I/O mechanisms. It will no-doubt need further enhancement. The virtio drivers add buffers to virtio queues; as the buffers are consumed the driver "interrupt" callbacks are invoked. There is also a generic implementation of config space which drivers can query to get setup information from the host. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Dor Laor <dor.laor@qumranet.com> Cc: Arnd Bergmann <arnd@arndb.de>
* Boot with virtual == physical to get closer to native Linux.Rusty Russell2007-10-2312-148/+141
| | | | | | | | | | | | | | | | | | | | 1) This allows us to get alot closer to booting bzImages. 2) It means we don't have to know page_offset. 3) The Guest needs to modify the boot pagetables to create the PAGE_OFFSET mapping before jumping to C code. 4) guest_pa() walks the page tables rather than using page_offset. 5) We don't use page_offset to figure out whether to emulate: it was always kinda quesationable, and won't work for instructions done before remapping (bzImage unpacking in particular). 6) We still want the kernel address for tlb flushing: have the initial hypercall give us that, too. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Allow guest to specify syscall vector to use.Rusty Russell2007-10-236-11/+79
| | | | | | | | | | (Based on Ron Minnich's LGUEST_PLAN9_SYSCALL patch). This patch allows Guests to specify what system call vector they want, and we try to reserve it. We only allow one non-Linux system call vector, to try to avoid DoS on the Host. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Rename "cr3" to "gpgdir" to avoid x86-specific naming.Rusty Russell2007-10-232-12/+12
| | | | Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Pagetables to use normal kernel typesMatias Zabaljauregui2007-10-233-141/+98
| | | | | | | | This is my first step in the migration of page_tables.c to the kernel types and functions/macros (2.6.23-rc3). Seems to be working OK. Signed-off-by: Matias Zabaljauregui <matias.zabaljauregui@cern.ch> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* lguest.h declares a struct timespec, make it include linux/time.hJes Sorensen2007-10-231-0/+1
| | | | | Signed-off-by: Jes Sorensen <jes@sgi.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Move register setup into i386_core.cJes Sorensen2007-10-233-36/+38
| | | | | | | | Move setup_regs() to lguest_arch_setup_regs() in i386_core.c given that this is very architecture specific. Signed-off-by: Jes Sorensen <jes@sgi.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Change example launcher to use unsigned long not u32Jes Sorensen2007-10-232-28/+30
| | | | | | | | | | | | | Apply Clue 2x4 to lguest userland<->kernel handling code and the lguest launcher. Pointers are not to be passed in u32's! Basic rule of thumb: Anything passing u32's back and forth should be passing unsigned longs to be portable to 64 bit archs. For those who forgotten already, I repeat: NO POINTERS IN u32! Signed-off-by: Jes Sorensen <jes@sgi.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Make hypercalls arch-independent.Jes Sorensen2007-10-236-84/+104
| | | | | | | | | | | | | | Clean up the hypercall code to make the code in hypercalls.c architecture independent. First process the common hypercalls and then call lguest_arch_do_hcall() if the call hasn't been handled. Rename struct hcall_ring to hcall_args. This patch requires the previous patch which reorganize the layout of struct lguest_regs on i386 so they match the layout of struct hcall_args. Signed-off-by: Jes Sorensen <jes@sgi.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Introduce "hcall" pointer to indicate pending hypercall.Rusty Russell2007-10-234-38/+34
| | | | | | | | | | | | | | | | | | | Currently we look at the "trapnum" to see if the Guest wants a hypercall. But once the hypercall is done we have to reset trapnum to a bogus value, otherwise if we exit to userspace and return, we'd run the same hypercall twice (that was a nasty bug to find!). This has two main effects: 1) When Jes's patch changes the hypercall args to be a generic "struct hcall_args" we simply change the type of "lg->hcall". It's set by arch code, so if it has to copy args or something it can do so, and point "hcall" into lg->arch somewhere. 2) Async hypercalls only get run when an actual hypercall is pending. This simplfies the code a little and is a more logical semantic. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Reorder guest saved regs to match hyperall orderJes Sorensen2007-10-232-4/+3
| | | | | | | | | | | | | Move eax next to ebx/ecx/edx in struct lguest_regs on i386, so they will be located together and allow it to map directly to a struct hcall_ring entry (which will be renamed struct hcall_args as in a subsequent patch). This is in preparation for making the code hcall code architecture independent. Signed-off-by: Jes Sorensen <jes@sgi.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Move i386 part of core.c to x86/core.c.Jes Sorensen2007-10-239-522/+613
| | | | | | | | Separate i386 architecture specific from core.c and move it to x86/core.c and add x86/lguest.h header file to match. Signed-off-by: Jes Sorensen <jes@sgi.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Make shadow IDT a complete IDT with 256 entries.Rusty Russell2007-10-232-32/+20
| | | | | | | This simplifies the code a little, in preparation for allowing alternate system call vectors in guests (Plan 9 uses 0x40). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Remove fixed limit on number of guests, and lguests array.Rusty Russell2007-10-237-45/+14
| | | | | | | | | | | Back when we had all the Guest state in the switcher, we had a fixed array of them. This is no longer necessary. If we switch the network code to using random_ether_addr (46 bits is enough to avoid clashes), we can get rid of the concept of "guest id" altogether. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Introduce guest mem offset, static link example launcherRusty Russell2007-10-238-140/+163
| | | | | | | | | | | In order to avoid problematic special linking of the Launcher, we give the Host an offset: this means we can use any memory region in the Launcher as Guest memory rather than insisting on mmap() at 0. The result is quite pleasing: a number of casts are replaced with simple additions. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Accept elf files that are valid but have sections that can not be mmap'ed ↵Ronald G. Minnich2007-10-231-29/+32
| | | | | | | | | | for some reason. Plan9 kernel binaries don't neatly align their ELF sections to our page boundaries. Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Rename switcher.S to x86/switcher_32.SRusty Russell2007-10-232-3/+5
| | | | | | | | lguest uses a "switcher" shim mapped high to bounce between host and guest. As lguest becomes less i386-centric, we separate this code into a subdir. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Move lguest guest support to arch/x86.Rusty Russell2007-10-237-11/+17
| | | | | | | | | Lguest has two sides: host support (to launch guests) and guest support (replacement boot path and paravirt_ops). This moves the guest side to arch/x86/lguest where it's closer to related code. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de>
* Move lguest hcalls to arch-specific headerJes Sorensen2007-10-232-65/+71
| | | | | | | | | | | Move architecture specific portion of lg_hcall code to asm-i386/lg_hcall.h and have it included from linux/lguest.h. [Changed to asm-i386/lguest_hcall.h so documentation finds it -RR] Signed-off-by: Jes Sorensen <jes@sgi.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Jes Sorensen <jes@sgi.com>
* Clocksource is continuous regardless of the state of the host's TSC.Tony Breeds2007-10-231-3/+2
| | | | | | | | | | | Currently lguest will spend a lot of of time waking up the host, as it cannot go tickless (if the [host] TSC has been marked unstable). On my laptop I was getting ~40% of wakeups from lguest. With this patch applied, my laptop is much happier! Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* lguest_devices belongs in lguest_bus.c: it's not i386-specific.Rusty Russell2007-10-232-1/+2
| | | | Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Make lguest_launcher.h types userspace-friendlyRusty Russell2007-10-233-13/+14
| | | | | | | | | lguest_launcher.h uses "u32" not "__u32", which sets a bad example. Fix that, and include <linux/types.h>. This means we need to use -I on the Launcher build line so types.h is found. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* lguest.txt updateRusty Russell2007-10-231-39/+29
| | | | | | | | | | o Describe the new split configurations o Highlight code documentation in drivers/lguest/README o Point out necessity of having a getty on /dev/hvc0 o Remove gratuitous "m" in example o Don't discuss I/O model here, stick to user documentation. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Lguest currently depends on 32-bit x86, not just x86.Rusty Russell2007-10-231-1/+1
| | | | Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Use copy_to_user() not put_user for struct timespecJes Sorensen2007-10-231-1/+1
| | | | | | | | | | Use copy_to_user() when copying a struct timespec to the guest - put_user() cannot handle two long's in one go on a 64bit arch. Signed-off-by: Jes Sorensen <jes@sgi.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Jes Sorensen <jes@sgi.com> Cc: Al Viro <viro@ftp.linux.org.uk>
* turn err into errx in lguest call sitesGlauber de Oliveira Costa2007-10-231-2/+2
| | | | | | | | | These two callsites should really be errx instead of err, since there is no errno associated with them in the moment they are issued. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Glauber de Oliveira Costa <gcosta@redhat.com>
* Remove binfmts.h include from lg.hRusty Russell2007-10-231-1/+0
| | | | | | It wasn't needed since a very early prototype of lguest. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Make asm-x86/bootparam.h includable from userspace.Rusty Russell2007-10-2313-225/+229
| | | | | | | | | | | To actually write a bootloader (or, say, the lguest launcher) currently requires duplication of these structures. Making them includable from userspace is much nicer. We merge the common userspace-required definitions of e820_32/64.h into e820.h for export. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Consolidate host virtualization support under Virtualization menuRusty Russell2007-10-232-2/+4
| | | | | | | Move lguest under the virtualization menu. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Avi Kivity <avi@qumranet.com>
* Normalize config options for guest supportRusty Russell2007-10-233-14/+32
| | | | | | | | | | | | | 1) Group all the "guest OS" support options together, under a PARAVIRT_GUEST menu. 2) Make those options select CONFIG_PARAVIRT, as suggested by Andi. 3) Make kconfig help titles consistent. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> Cc: Zach Amsden <zach@vmware.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Chris Wright <chrisw@sous-sol.org>
* procfs: fix kernel-doc param warningsRandy Dunlap2007-10-221-24/+22
| | | | | | | | | | | | Fix mnt_flush_task() misplaced kernel-doc. Fix typos in some of the doc text. Warning(linux-2.6.23-git17//fs/proc/base.c:2280): No description found for parameter 'mnt' Warning(linux-2.6.23-git17//fs/proc/base.c:2280): No description found for parameter 'pid' Warning(linux-2.6.23-git17//fs/proc/base.c:2280): No description found for parameter 'tgid' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* auditsc: fix kernel-doc param warningsRandy Dunlap2007-10-221-2/+2
| | | | | | | | | | Fix kernel-doc for auditsc parameter changes. Warning(linux-2.6.23-git17//kernel/auditsc.c:1623): No description found for parameter 'dentry' Warning(linux-2.6.23-git17//kernel/auditsc.c:1666): No description found for parameter 'dentry' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Expand hwif->host_flags so that it fits new flags.David Miller2007-10-221-1/+1
| | | | | | | | | | | Commit 238e4f142c33bb34440cc64029dde7b9fbc4e65f ("ide: add IDE_HFLAG_NO_LBA48 and IDE_HFLAG_NO_LBA48_DMA host flags") caused a regression because the host_flags in struct hwif_s wasn't expanded to cope with the fact that the host flags no longer fit in 16 bits. Signed-off-by: David S. Miller <davem@davemloft.net> [ I hate having to add good commit descriptions. - Linus ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'for-linus' of ↵Linus Torvalds2007-10-227-40/+89
|\ | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: appletouch - apply idle reset logic to all touchpads Input: usbtouchscreen - add support for GoTop tablet devices Input: bf54x-keys - return real error when request_irq() fails Input: i8042 - export i8042_command()
| * Input: appletouch - apply idle reset logic to all touchpadsAnton Ekblad2007-10-221-14/+11
| | | | | | | | | | | | | | | | | | | | Not only Geyser 3 but also Geyser 1 need to be reset after they become idle to stop them from needlessly waking up the kernel. Do idle reset on all touchpads, regardless of their version - if we see 10 empty packets the touchpad needs to be reset; good touchpads should not send empty packets anyway. Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
| * Input: usbtouchscreen - add support for GoTop tablet devicesJerrold Jones2007-10-222-2/+40
| | | | | | | | | | | | | | | | Add support for GoTop Super_Q2/GogoPen/PenPower tablets to usbtouchscreen. Protocol discovery was done by Yick Yan Lam. Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
| * Input: bf54x-keys - return real error when request_irq() failsMichael Hennerich2007-10-221-1/+0
| | | | | | | | | | | | Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
| * Input: i8042 - export i8042_command()Márton Németh2007-10-223-23/+38
| | | | | | | | | | | | | | | | | | Export the i8042_command() function which manages the mutual exclusion with the help of the i8042_lock spinlock. This allows to access i8042 safely from other parts of the kernel. Signed-off-by: Márton Németh <nm127@freemail.hu> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
* | Merge branch 'for-linus' of ↵Linus Torvalds2007-10-222-4/+4
|\ \ | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/cooloney/blackfin-2.6 * 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/cooloney/blackfin-2.6: Blackfin arch: use KBUILD_CFLAGS and KBUILD_AFLAGS in Makefile Blackfin arch: Javier Herrer writes: fix building when icache and dcache is disabled
| * | Blackfin arch: use KBUILD_CFLAGS and KBUILD_AFLAGS in MakefileBryan Wu2007-10-221-2/+2
| | | | | | | | | | | | | | | Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: Javier Herrer writes: fix building when icache and dcache is ↵Mike Frysinger2007-10-221-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | disabled Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
* | | Merge branch 'for-linus' of ↵Linus Torvalds2007-10-226-69/+103
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: KVM: Use new smp_call_function_mask() in kvm_flush_remote_tlbs() sched: don't clear PF_VCPU in scheduler KVM: Improve local apic timer wraparound handling KVM: Fix local apic timer divide by zero KVM: Move kvm_guest_exit() after local_irq_enable() KVM: x86 emulator: fix access registers for instructions with ModR/M byte and Mod = 3 KVM: VMX: Force vm86 mode if setting flags during real mode KVM: x86 emulator: implement 'movnti mem, reg' KVM: VMX: Reset mmu context when entering real mode KVM: VMX: Handle NMIs before enabling interrupts and preemption KVM: MMU: Set shadow pte atomically in mmu_pte_write_zap_pte() KVM: x86 emulator: fix repne/repnz decoding KVM: x86 emulator: fix merge screwup due to emulator split
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