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path: root/drivers/lguest/lg.h
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* drivers: Remove unnecessary inclusions of asm/semaphore.hMatthew Wilcox2008-04-18
| | | | | | | | | None of these files use any of the functionality promised by asm/semaphore.h. It's possible that they rely on it dragging in some unrelated header file, but I can't build all these files, so we'll have fix any build failures as they come up. Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
* lguest: Use explicit includes rateher than indirectGlauber de Oliveira Costa2008-01-30
| | | | | | | | | | | | explicitly use ktime.h include explicitly use hrtimer.h include explicitly use sched.h include This patch adds headers explicitly to lguest sources file, to avoid depending on them being included somewhere else. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* lguest: get rid of lg variable assignmentsGlauber de Oliveira Costa2008-01-30
| | | | | | | | We can save some lines of code by getting rid of *lg = cpu... lines of code spread everywhere by now. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* lguest: move changed bitmap to lg_cpuGlauber de Oliveira Costa2008-01-30
| | | | | | | | events represented in the 'changed' bitmap are per-cpu, not per-guest. move it to the lg_cpu structure Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* lguest: move last_pages to lg_cpuGlauber de Oliveira Costa2008-01-30
| | | | | | | | in our new model, pages are assigned to a virtual cpu, not to a guest. We move it to the lg_cpu structure. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* lguest: per-vcpu lguest pgdir managementGlauber de Oliveira Costa2008-01-30
| | | | | | | | | | | this patch makes the pgdir management per-vcpu. The pgdirs pool is still guest-wide (although it'll probably need to grow when we are really executing more vcpus), but the pgdidx index is gone, since it makes no sense anymore. Instead, we use a per-vcpu index. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* lguest: make pending notifications per-vcpuGlauber de Oliveira Costa2008-01-30
| | | | | | | | this patch makes the pending_notify field, used to control pending notifications, per-vcpu, instead of per-guest Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* lguest: makes special fields be per-vcpuGlauber de Oliveira Costa2008-01-30
| | | | | | | | | | lguest struct have room for some fields, namely, cr2, ts, esp1 and ss1, that are not really guest-wide, but rather, vcpu-wide. This patch puts it in the vcpu struct Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* lguest: per-vcpu lguest task managementGlauber de Oliveira Costa2008-01-30
| | | | | | | | | | lguest uses tasks to control its running behaviour (like sending breaks, controlling halted state, etc). In a per-vcpu environment, each vcpu will have its own underlying task. So this patch makes the infrastructure for that possible Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* lguest: replace lguest_arch with lg_cpu_arch.Glauber de Oliveira Costa2008-01-30
| | | | | | | | | | | | The fields found in lguest_arch are not really per-guest, but per-cpu (gdt, idt, etc). So this patch turns lguest_arch into lg_cpu_arch. It makes sense to have a per-guest per-arch struct, but this can be addressed later, when the need arrives. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* lguest: make registers per-vcpuGlauber de Oliveira Costa2008-01-30
| | | | | | | | | | This is the most obvious per-vcpu field: registers. So this patch moves it from struct lguest to struct vcpu, and patch the places in which they are used, accordingly Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* lguest: map_switcher_in_guest() per-vcpuGlauber de Oliveira Costa2008-01-30
| | | | | | | | | | | The switcher needs to be mapped per-vcpu, because different vcpus will potentially have different page tables (they don't have to, because threads will share the same). So our first step is the make the function receive a vcpu struct Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* lguest: per-vcpu interrupt processing.Glauber de Oliveira Costa2008-01-30
| | | | | | | This patch adapts interrupt processing for using the vcpu struct. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* lguest: per-vcpu lguest timersGlauber de Oliveira Costa2008-01-30
| | | | | | | | Here, I introduce per-vcpu timers. With this, we can have local expiries, needed for accounting time in smp guests Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* lguest: make hypercalls use the vcpu structGlauber de Oliveira Costa2008-01-30
| | | | | | | | | this patch changes do_hcall() and do_async_hcall() interfaces (and obviously their callers) to get a vcpu struct. Again, a vcpu services the hypercall, not the whole guest Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* lguest: per-cpu run guestGlauber de Oliveira Costa2008-01-30
| | | | | | | | | This patch makes the run_guest() routine use the lg_cpu struct. This is required since in a smp guest environment, there's no more the notion of "running the guest", but rather, it is "running the vcpu" Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* lguest: introduce vcpu structGlauber de Oliveira Costa2008-01-30
| | | | | | | | this patch introduces a vcpu struct for lguest. In upcoming patches, more and more fields will be moved from the lguest struct to the vcpu Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* lguest: documentation updateRusty Russell2007-10-25
| | | | | | | | Went through the documentation doing typo and content fixes. This patch contains only comment and whitespace changes. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* lguest: remove unused "wake" element from struct lguestRusty Russell2007-10-25
| | | | | Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* generalize lgread_u32/lgwrite_u32.Rusty Russell2007-10-23
| | | | | | | | | | | | | | Jes complains that page table code still uses lgread_u32 even though it now uses general kernel pte types. The best thing to do is to generalize lgread_u32 and lgwrite_u32. This means we lose the efficiency of getuser(). We could potentially regain it if we used __copy_from_user instead of copy_from_user, but I'm not certain that our range check is equivalent to access_ok() on all platforms. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Jes Sorensen <jes@sgi.com>
* Remove old lguest I/O infrrasructure.Rusty Russell2007-10-23
| | | | | | | | | | | 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>
* Boot with virtual == physical to get closer to native Linux.Rusty Russell2007-10-23
| | | | | | | | | | | | | | | | | | | | 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 Russell2007-10-23
| | | | | | | | | | (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 Russell2007-10-23
| | | | Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Pagetables to use normal kernel typesMatias Zabaljauregui2007-10-23
| | | | | | | | 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>
* Move register setup into i386_core.cJes Sorensen2007-10-23
| | | | | | | | 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>
* Make hypercalls arch-independent.Jes Sorensen2007-10-23
| | | | | | | | | | | | | | 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 Russell2007-10-23
| | | | | | | | | | | | | | | | | | | 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>
* Move i386 part of core.c to x86/core.c.Jes Sorensen2007-10-23
| | | | | | | | 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 Russell2007-10-23
| | | | | | | 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 Russell2007-10-23
| | | | | | | | | | | 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 Russell2007-10-23
| | | | | | | | | | | 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>
* Remove binfmts.h include from lg.hRusty Russell2007-10-23
| | | | | | It wasn't needed since a very early prototype of lguest. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* Provide timespec to guests rather than jiffies clock.Rusty Russell2007-07-28
| | | | | | | | | | | | | | | | | A non-periodic clock_event_device and the "jiffies" clock don't mix well: tick_handle_periodic() can go into an infinite loop. Currently lguest guests use the jiffies clock when the TSC is unusable. Instead, make the Host write the current time into the lguest page on every interrupt. This doesn't cost much but is more precise and at least as accurate as the jiffies clock. It also gets rid of the GET_WALLCLOCK hypercall. Also, delay setting sched_clock until our clock is set up, otherwise the early printk timestamps can go backwards (not harmful, just ugly). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* lguest: documentation V: HostRusty Russell2007-07-26
| | | | | | | | Documentation: The Host Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* lguest: documentation IV: LauncherRusty Russell2007-07-26
| | | | | | | | Documentation: The Launcher Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* lguest: the host codeRusty Russell2007-07-19
This is the code for the "lg.ko" module, which allows lguest guests to be launched. [akpm@linux-foundation.org: update for futex-new-private-futexes] [akpm@linux-foundation.org: build fix] [jmorris@namei.org: lguest: use hrtimers] [akpm@linux-foundation.org: x86_64 build fix] Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> Cc: Eric Dumazet <dada1@cosmosbay.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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