31 Jan, 2008
2 commits
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drivers/lguest/x86/core.c: In function ‘copy_in_guest_info’:
drivers/lguest/x86/core.c:97: error: ‘struct x86_hw_tss’ has no member named ‘esp1’Signed-off-by: Rusty Russell
Signed-off-by: Linus 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
30 Jan, 2008
14 commits
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This changes size-specific register names (eip/rip, esp/rsp, etc.) to
generic names in the thread and tss structures.Signed-off-by: H. Peter Anvin
Signed-off-by: Ingo Molnar
Signed-off-by: Thomas Gleixner -
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
Signed-off-by: Rusty Russell -
events represented in the 'changed' bitmap are per-cpu, not per-guest.
move it to the lg_cpu structureSigned-off-by: Glauber de Oliveira Costa
Signed-off-by: Rusty Russell -
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
Signed-off-by: Rusty Russell -
in our model, a guest does not run in a cpu anymore: a virtual cpu
does. So we change last_guest to last_cpuSigned-off-by: Glauber de Oliveira Costa
Signed-off-by: Rusty Russell -
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
Signed-off-by: Rusty Russell -
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
Signed-off-by: Rusty Russell -
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
Signed-off-by: Rusty Russell -
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, accordinglySigned-off-by: Glauber de Oliveira Costa
Signed-off-by: Rusty Russell -
emulate_insn() needs to know about current eip, which will be,
in the future, a per-vcpu thing. So in this patch, the function
prototype is modified to receive a vcpu structSigned-off-by: Glauber de Oliveira Costa
Signed-off-by: Rusty Russell -
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
Signed-off-by: Rusty Russell -
This patch adapts interrupt processing for using the vcpu struct.
Signed-off-by: Glauber de Oliveira Costa
Signed-off-by: Rusty Russell -
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
guestSigned-off-by: Glauber de Oliveira Costa
Signed-off-by: Rusty Russell -
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
Signed-off-by: Rusty Russell
26 Jan, 2008
1 commit
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Replace all lock_cpu_hotplug/unlock_cpu_hotplug from the kernel and use
get_online_cpus and put_online_cpus instead as it highlights the
refcount semantics in these operations.The new API guarantees protection against the cpu-hotplug operation, but
it doesn't guarantee serialized access to any of the local data
structures. Hence the changes needs to be reviewed.In case of pseries_add_processor/pseries_remove_processor, use
cpu_maps_update_begin()/cpu_maps_update_done() as we're modifying the
cpu_present_map there.Signed-off-by: Gautham R Shenoy
Signed-off-by: Ingo Molnar
25 Oct, 2007
2 commits
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Went through the documentation doing typo and content fixes. This
patch contains only comment and whitespace changes.Signed-off-by: Rusty Russell
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Signed-off-by: Rusty Russell
23 Oct, 2007
10 commits
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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
Acked-by: Jes Sorensen -
This gets rid of the lguest bus, drivers and DMA mechanism, to make
way for a generic virtio mechanism.Signed-off-by: Rusty Russell
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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
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(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
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Move setup_regs() to lguest_arch_setup_regs() in i386_core.c given
that this is very architecture specific.Signed-off-by: Jes Sorensen
Signed-off-by: Rusty Russell -
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
Signed-off-by: Rusty Russell -
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
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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
Signed-off-by: Rusty Russell -
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
Signed-off-by: Rusty Russell -
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
