date:20080325

Re: [kvm-devel] [RFC/PATCH 01/15] preparation: provide hook to enable pgstes in user pagetable

2008-03-25 Thread Carsten Otte

Avi Kivity wrote:
 Well, dup_mm() can't work (and now that I think about it, for more 
 reasons -- what if the process has threads?).
We lock out multithreaded users already, -EINVAL.


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Re: [kvm-devel] [RFC/PATCH 01/15] preparation: provide hook to enable pgstes in user pagetable

2008-03-25 Thread Avi Kivity

Carsten Otte wrote:
 Avi Kivity wrote:
 Well, dup_mm() can't work (and now that I think about it, for more 
 reasons -- what if the process has threads?).
 We lock out multithreaded users already, -EINVAL.


Would be much better if this can be avoided.  It's surprising.

-- 
Any sufficiently difficult bug is indistinguishable from a feature.


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[kvm-devel] [GIT PULL] KVM fixes for 2.6.25-rc6

2008-03-25 Thread Avi Kivity

Linus, please pull from the repo and branch

  git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm.git for-linus

The patches fix a memory leak, ioperm() failures on unrelated processes
on the host, a locking issue, and a host crash when host userspace changes
the memory map.

Diffstat, shortlog and individual patches follow:

 arch/x86/kvm/mmu.c |   18 ++
 arch/x86/kvm/vmx.c |7 ++-
 2 files changed, 16 insertions(+), 9 deletions(-)

Avi Kivity (3):
  KVM: VMX: Restore tss even on x86_64
  KVM: MMU: Fix is_rmap_pte() with io ptes
  KVM: MMU: Fix memory leak on guest demand faults

Marcelo Tosatti (2):
  KVM: MMU: handle page removal with shadow mapping
  KVM: VMX: convert init_rmode_tss() to slots_lock

From 5dc832628229d2736fab10523566855c3cda622d Mon Sep 17 00:00:00 2001
From: Avi Kivity [EMAIL PROTECTED]
Date: Sun, 16 Mar 2008 18:48:26 +0200
Subject: [PATCH] KVM: VMX: Restore tss even on x86_64

The vmx hardware state restore restores the tss selector and base address, but
not its length.  Usually, this does not matter since most of the tss contents
is within the default length of 0x67.  However, if a process is using ioperm()
to grant itself I/O port permissions, an additional bitmap within the tss,
but outside the default length is consulted.  The effect is that the process
will receive a SIGSEGV instead of transparently accessing the port.

Fix by restoring the tss length.  Note that i386 had this working already.

Closes bugzilla 10246.

Signed-off-by: Avi Kivity [EMAIL PROTECTED]

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 94ea724..f2df03c 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -349,8 +349,6 @@ static void update_exception_bitmap(struct kvm_vcpu *vcpu)
 
 static void reload_tss(void)
 {
-#ifndef CONFIG_X86_64
-
/*
 * VT restores TR but not its size.  Useless.
 */
@@ -361,7 +359,6 @@ static void reload_tss(void)
descs = (void *)gdt.base;
descs[GDT_ENTRY_TSS].type = 9; /* available TSS */
load_TR_desc();
-#endif
 }
 
 static void load_transition_efer(struct vcpu_vmx *vmx)
-- 
1.5.4.2


From 4b1a80fa65aa9e2ec5696998856136c886385538 Mon Sep 17 00:00:00 2001
From: Avi Kivity [EMAIL PROTECTED]
Date: Sun, 23 Mar 2008 12:18:19 +0200
Subject: [PATCH] KVM: MMU: Fix is_rmap_pte() with io ptes

is_rmap_pte() doesn't take into account io ptes, which have the avail bit set.

Signed-off-by: Avi Kivity [EMAIL PROTECTED]

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index d8172aa..e49c4d4 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -222,8 +222,7 @@ static int is_io_pte(unsigned long pte)
 
 static int is_rmap_pte(u64 pte)
 {
-   return pte != shadow_trap_nonpresent_pte
-pte != shadow_notrap_nonpresent_pte;
+   return is_shadow_present_pte(pte);
 }
 
 static gfn_t pse36_gfn_delta(u32 gpte)
-- 
1.5.4.2


From 15aaa819e20cb183f26392ed8ea16020630ef142 Mon Sep 17 00:00:00 2001
From: Marcelo Tosatti [EMAIL PROTECTED]
Date: Mon, 17 Mar 2008 10:08:18 -0300
Subject: [PATCH] KVM: MMU: handle page removal with shadow mapping

Do not assume that a shadow mapping will always point to the same host
frame number.  Fixes crash with madvise(MADV_DONTNEED).

[avi: move after first printk(), add another printk()]

Signed-off-by: Marcelo Tosatti [EMAIL PROTECTED]
Signed-off-by: Avi Kivity [EMAIL PROTECTED]

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index e49c4d4..4ba85d9 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -892,14 +892,25 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 
*shadow_pte,
 int *ptwrite, gfn_t gfn, struct page *page)
 {
u64 spte;
-   int was_rmapped = is_rmap_pte(*shadow_pte);
+   int was_rmapped = 0;
int was_writeble = is_writeble_pte(*shadow_pte);
+   hfn_t host_pfn = (*shadow_pte  PT64_BASE_ADDR_MASK)  PAGE_SHIFT;
 
pgprintk(%s: spte %llx access %x write_fault %d
  user_fault %d gfn %lx\n,
 __FUNCTION__, *shadow_pte, pt_access,
 write_fault, user_fault, gfn);
 
+   if (is_rmap_pte(*shadow_pte)) {
+   if (host_pfn != page_to_pfn(page)) {
+   pgprintk(hfn old %lx new %lx\n,
+host_pfn, page_to_pfn(page));
+   rmap_remove(vcpu-kvm, shadow_pte);
+   }
+   else
+   was_rmapped = 1;
+   }
+
/*
 * We don't set the accessed bit, since we sometimes want to see
 * whether the guest actually used the pte (in order to detect
-- 
1.5.4.2


From 707a18a51d83d9180a63b3cbaad8eda7764a8689 Mon Sep 17 00:00:00 2001
From: Marcelo Tosatti [EMAIL PROTECTED]
Date: Tue, 18 Mar 2008 17:42:34 -0300
Subject: [PATCH] KVM: VMX: convert init_rmode_tss() to slots_lock

init_rmode_tss was forgotten during the conversion from mmap_sem to
slots_lock.

INFO: task

[kvm-devel] KVM crashes when booting from Ubuntu ISO images.

2008-03-25 Thread Mohammed Gamal

Hello Everyone,
I was trying to install Ubuntu on a VM and tried to boot the
installation directly from the ISO image, doing that KVM crashes
giving this output:
--
exception 0 (0)
rax 0053 rbx 0080 rcx 0031 rdx
0080
rsi 004c rdi 0008ff53 rsp  rbp

r8   r9   r10  r11

r12  r13  r14  r15

rip fce2 rflags 00033217
cs  (/ p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
ds  (/ p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
es  (/ p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
ss  (/ p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
fs  (/ p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
gs  (/ p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
tr  (0885/2088 p 1 dpl 0 db 0 s 0 type b l 0 g 0 avl 0)
ldt  (/ p 1 dpl 0 db 0 s 0 type 2 l 0 g 0 avl 0)
gdt fa580/30
idt 0/3ff
cr0 6010 cr2 0 cr3 0 cr4 0 cr8 0 efer 0
code: f6 fc 1c 43 d5 03 3d 00 d4 03 00 c0 b7 01 00 00 d5 03 08 fd 1c
43 d5 03 3e 00 d4 03 00 c0
--

Is this caused by KVM not supporting real mode on Intel hosts, or is
it caused by some other reason?

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Re: [kvm-devel] KVM crashes when booting from Ubuntu ISO images.

2008-03-25 Thread Alexey Eremenko


Is this caused by KVM not supporting real mode on Intel hosts, or is it caused 
by some other reason?

Yes, it is correct. Ubuntu 7.04/7.10 won't work anytime soon.

There are few workarounds:
1. use text-mode bootloader
2. use special patches for KVM (not included in mainline, but in Alexander 
Graf's tree)
  (this is ugly hack, so it was not accepted into mainline KVM)
3. use special patches for Graphical GFX GRUB

But do not worry; newer Linux operating systems 2008 fix this problem with 
solution #3.
i.e. openSUSE 11.x and Ubuntu 8.x won't have this problem (tested with several 
Alphas)

-Alexey Technologov, Qumranet QA Team Member
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Re: [kvm-devel] KVM crashes when booting from Ubuntu ISO images.

2008-03-25 Thread Alexey Eremenko

Solution #2 patches:
Any pointers to where I can get these patches.

http://packages.opensuse-community.org/
http://download.opensuse.org/repositories/home:/algraf/openSUSE_10.3/src/

Get the src.RPM, and extract patches from it.

Not sure about solution #3 patches.
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Re: [kvm-devel] KVM crashes when booting from Ubuntu ISO images.

2008-03-25 Thread Mohammed Gamal

On Tue, Mar 25, 2008 at 11:58 AM, Alexey Eremenko
[EMAIL PROTECTED] wrote:




 Is this caused by KVM not supporting real mode on Intel hosts, or is it
 caused by some other reason?

  Yes, it is correct. Ubuntu 7.04/7.10 won't work anytime soon.

  There are few workarounds:
  1. use text-mode bootloader
  2. use special patches for KVM (not included in mainline, but in Alexander
 Graf's tree)
(this is ugly hack, so it was not accepted into mainline KVM)
  3. use special patches for Graphical GFX GRUB

Any pointers to where I can get these patches.

Thanks,
Mohammed

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Re: [kvm-devel] KVM crashes when booting from Ubuntu ISO images.

2008-03-25 Thread Dor Laor


On Tue, 2008-03-25 at 12:35 +0200, Mohammed Gamal wrote:
 On Tue, Mar 25, 2008 at 11:58 AM, Alexey Eremenko
 [EMAIL PROTECTED] wrote:
 
 
 
 
  Is this caused by KVM not supporting real mode on Intel hosts, or is it
  caused by some other reason?
 
   Yes, it is correct. Ubuntu 7.04/7.10 won't work anytime soon.
 
   There are few workarounds:
   1. use text-mode bootloader
   2. use special patches for KVM (not included in mainline, but in Alexander
  Graf's tree)
 (this is ugly hack, so it was not accepted into mainline KVM)
   3. use special patches for Graphical GFX GRUB
 
 Any pointers to where I can get these patches.
 

Get http://codemonkey.ws/gfxboot-disable/ and run it on a copy of the
iso image. It automatically switches to text mode.
btw: the problem is not Ubuntu but KVM over Intel, not being able to
cope with big real mode.

 Thanks,
 Mohammed
 
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[kvm-devel] KVM: register the kvm mmu cache with the shrinker.

2008-03-25 Thread Izik Eidus

this is the shrinker patch with all comments applied beside adding aging 
mechanism
it look like the aging mechanism is not really needed and therefor for now it 
isn't
implemented.

From 8503a57ae88ba819e4eac6371172772c98b485f0 Mon Sep 17 00:00:00 2001
From: Izik Eidus [EMAIL PROTECTED]
Date: Tue, 25 Mar 2008 14:03:27 +0200
Subject: [PATCH] KVM: register the kvm mmu cache with the shrinker.

Signed-off-by: Izik Eidus [EMAIL PROTECTED]
---
 arch/x86/kvm/mmu.c |   54 
 1 files changed, 54 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index c67ec62..c42c0db 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1972,6 +1972,57 @@ void kvm_mmu_zap_all(struct kvm *kvm)
kvm_flush_remote_tlbs(kvm);
 }
 
+void kvm_mmu_remove_one_alloc_mmu_page(struct kvm *kvm)
+{
+   struct kvm_mmu_page *page;
+
+   page = container_of(kvm-arch.active_mmu_pages.prev,
+   struct kvm_mmu_page, link);
+   kvm_mmu_zap_page(kvm, page);
+}
+
+static int mmu_shrink(int nr_to_scan, gfp_t gfp_mask)
+{
+   struct kvm *kvm;
+   struct kvm *kvm_freed = NULL;
+   int cache_count = 0;
+
+   spin_lock(kvm_lock);
+   if (list_empty(vm_list)) {
+   spin_unlock(kvm_lock);
+   return 0;
+   }
+   list_for_each_entry(kvm, vm_list, vm_list) {
+   int npages;
+
+   spin_lock(kvm-mmu_lock);
+   npages = kvm-arch.n_alloc_mmu_pages -
+kvm-arch.n_free_mmu_pages;
+   cache_count += npages - KVM_MIN_ALLOC_MMU_PAGES;
+   if (!kvm_freed  nr_to_scan  0  npages 
+   KVM_MIN_ALLOC_MMU_PAGES) {
+   kvm_mmu_remove_one_alloc_mmu_page(kvm);
+   cache_count--;
+   kvm_freed = kvm;
+   }
+   nr_to_scan--;
+
+   spin_unlock(kvm-mmu_lock);
+   }
+   if (kvm_freed) {
+   list_del(kvm_freed-vm_list);
+   list_add_tail(kvm_freed-vm_list, vm_list);
+   }
+   spin_unlock(kvm_lock);
+
+   return cache_count;
+}
+
+static struct shrinker mmu_shrinker = {
+   .shrink = mmu_shrink,
+   .seeks = DEFAULT_SEEKS * 10,
+};
+
 void kvm_mmu_module_exit(void)
 {
if (pte_chain_cache)
@@ -1980,6 +2031,7 @@ void kvm_mmu_module_exit(void)
kmem_cache_destroy(rmap_desc_cache);
if (mmu_page_header_cache)
kmem_cache_destroy(mmu_page_header_cache);

-- 
woof.

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[kvm-devel] Ведение кассовых операций

2008-03-25 Thread Антонида

Вeдeниe кассoвых oпeраций. Правила, нарушeния, кoнтрoль.

Сeминар прoйдёт 15 апрeля 2008, г. Мoсква

В прoграммe:

1. oбщиe правила вeдeния кассoвых oпeраций в РФ. Нoрмативная база.
2. oрганизация наличных расчeтoв на прeдприятии
3. oфoрмлeниe кассoвых дoкумeнтoв
4. Дeнeжная наличнoсть в кассe прeдприятия
5. Дeнeжныe дoкумeнты
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7. Валютная касса
8. Наличная выручка
9. Примeнeниe ККМ
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признания расхoдoв и вычeта НДС на oснoвании бланкoв стрoгoй oтчeтнoсти. Учeт
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19. Рeвизия кассы и кoнтрoль за сoблюдeниeм кассoвoй дисциплины.
20. Кoнтрoль пoрядка oсущeствлeния кассoвых oпeраций, пoрядoк сoставлeния
прoтoкoла oб административнoм нарушeнии, срoки давнoсти. Санкции за нарушeния
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