Required by PEBS support as discussed at
Subject: [patch 0/4] [patch 0/5] Implement PEBS virtualization for Silvermont
Message-Id: 1401412327-14810-1-git-send-email-a...@firstfloor.org
Thread.
--
v2:
- unify remote kick function (Gleb)
- keep sptes
Allow vcpus to pin spte translations by:
1) Creating a per-vcpu list of pinned ranges.
2) On mmu reload request:
- Fault ranges.
- Mark sptes with a pinned bit.
- Mark shadow pages as pinned.
3) Then modify the following actions:
- Page age = skip spte flush.
Skip pinned shadow pages when selecting pages to zap.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
---
arch/x86/kvm/mmu.c | 26 ++
1 file changed, 18 insertions(+), 8 deletions(-)
Index: kvm.pinned-sptes/arch/x86/kvm/mmu.c
To be used by next patch.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
---
arch/x86/include/asm/kvm_host.h |2 +-
arch/x86/kvm/mmu.c | 11 ++-
arch/x86/kvm/paging_tmpl.h |2 +-
arch/x86/kvm/x86.c |2 +-
4 files changed, 9 insertions(+),
Reload remote vcpus MMU from GET_DIRTY_LOG codepath, before
deleting a pinned spte.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
---
arch/x86/kvm/mmu.c | 29 +++--
1 file changed, 23 insertions(+), 6 deletions(-)
Index: kvm.pinned-sptes/arch/x86/kvm/mmu.c
Skip pinned shadow pages when selecting pages to zap.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
---
arch/x86/kvm/mmu.c | 26 ++
1 file changed, 18 insertions(+), 8 deletions(-)
Index: kvm/arch/x86/kvm/mmu.c
Request KVM_REQ_MMU_RELOAD when deleting sptes from MMU notifiers.
Keep pinned sptes intact if page aging.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
---
arch/x86/kvm/mmu.c | 71 ++---
1 file changed, 62 insertions(+), 9 deletions(-)
To be used by next patch.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
---
arch/x86/include/asm/kvm_host.h |2 +-
arch/x86/kvm/mmu.c | 11 ++-
arch/x86/kvm/paging_tmpl.h |2 +-
arch/x86/kvm/x86.c |2 +-
4 files changed, 9 insertions(+),
Allow vcpus to pin spte translations by:
1) Creating a per-vcpu list of pinned ranges.
2) On mmu reload request:
- Fault ranges.
- Mark sptes with a pinned bit.
- Mark shadow pages as pinned.
3) Then modify the following actions:
- Page age = skip spte flush.
Required by PEBS support as discussed at
Subject: [patch 0/5] Implement PEBS virtualization for Silvermont
Message-Id: 1401412327-14810-1-git-send-email-a...@firstfloor.org
Thread.
--
To unsubscribe from this list: send the line unsubscribe kvm in
the body of a message to
Reload remote vcpus MMU from GET_DIRTY_LOG codepath, before
deleting a pinned spte.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
---
arch/x86/kvm/mmu.c |3 +++
1 file changed, 3 insertions(+)
Index: kvm.pinned-sptes/arch/x86/kvm/mmu.c
Verify the cr3 address stored in vcpu-arch.cr3 points to an existant
memslot. If not, inject a triple fault.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
Index: kvm/arch/x86/kvm/mmu.c
===
--- kvm.orig/arch/x86/kvm/mmu.c
+++
kvm_handle_hva, called by MMU notifiers, manipulates mmu data only with
the protection of mmu_lock.
Update kvm_mmu_change_mmu_pages callers to take mmu_lock, thus protecting
against kvm_handle_hva.
CC: Andrea Arcangeli aarca...@redhat.com
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
kvm_handle_hva relies on mmu_lock protection to safely access
the memslot structures.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
Index: kvm-pending/virt/kvm/kvm_main.c
===
--- kvm-pending.orig/virt/kvm/kvm_main.c
+++
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
Index: kvm-kmod/external-module-compat-comm.h
===
--- kvm-kmod.orig/external-module-compat-comm.h
+++ kvm-kmod/external-module-compat-comm.h
@@ -116,6 +116,10 @@ int
Addressing comments.
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kvm_assigned_dev_ack_irq is vulnerable to a race condition with the
interrupt handler function. It does:
if (dev-host_irq_disabled) {
enable_irq(dev-host_irq);
dev-host_irq_disabled = false;
}
If an interrupt triggers before the
Support to shrinking aliases complicates kernel code unnecessarily,
while userspace can do the same with two operations, delete an alias,
and create a new alias.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
Index: kvm-pending/arch/x86/kvm/x86.c
Addressing comments.
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smp_send_reschedule was exported (via smp_ops) in v2.6.24.
Create a compat function which schedules the IPI to keventd context,
in case interrupts are disabled, for kernels 2.6.24.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
Index: kvm-kmod/ia64/hack-module.awk
KVM uses a function call IPI to cause the exit of a guest running on a
physical cpu. For virtual interrupt notification there is no need to
wait on IPI receival, or to execute any function.
This is exactly what the reschedule IPI does, without the overhead
of function IPI. So use it instead of
Disallow the deletion of memory slots (and aliases, for x86 case), if a
vcpu contains a cr3 that points to such slot/alias.
This complements commit 6c20e1442bb1c62914bb85b7f4a38973d2a423ba.
v2:
- set KVM_REQ_TRIPLE_FAULT
- use __KVM_HAVE_ARCH_CAN_FREE_MEMSLOT to avoid duplication of stub
kvm_handle_hva, called by MMU notifiers, manipulates mmu data only with
the protection of mmu_lock.
Update kvm_mmu_change_mmu_pages callers to take mmu_lock, thus protecting
against kvm_handle_hva.
CC: Andrea Arcangeli aarca...@redhat.com
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
Support to shrinking aliases complicates kernel code unnecessarily,
while userspace can do the same with two operations, delete an alias,
and create a new alias.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
Index: kvm/arch/x86/kvm/x86.c
kvm_handle_hva relies on mmu_lock protection to safely access
the memslot structures.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
Index: kvm/virt/kvm/kvm_main.c
===
--- kvm.orig/virt/kvm/kvm_main.c
+++
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Disallow the deletion of memory slots (and aliases, for x86 case), if a
vcpu contains a cr3 that points to such slot/alias.
This complements commit 6c20e1442bb1c62914bb85b7f4a38973d2a423ba.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
Index: kvm/arch/ia64/kvm/kvm-ia64.c
smp_send_reschedule was exported (via smp_ops) in v2.6.24.
Create a compat function which schedules the IPI to keventd context,
in case interrupts are disabled, for kernels 2.6.24.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
diff --git a/kvm/kernel/external-module-compat-comm.h
KVM uses a function call IPI to cause the exit of a guest running on a
physical cpu. For virtual interrupt notification there is no need to
wait on IPI receival, or to execute any function.
This is exactly what the reschedule IPI does, without the overhead
of function IPI. So use it instead of
kvm_assigned_dev_ack_irq is vulnerable to a race condition with the
interrupt handler function. It does:
if (dev-host_irq_disabled) {
enable_irq(dev-host_irq);
dev-host_irq_disabled = false;
}
If an interrupt triggers before the
From: Jan Blunck jblu...@suse.de
This moves the get_cpu() call down to be called after we wake up the
waiters. Therefore the waitqueue locks can savely be rt mutex.
Signed-off-by: Jan Blunck jblu...@suse.de
Signed-off-by: Sven-Thorsten Dietrich s...@thebigcorporation.com
Signed-off-by: Marcelo
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