https://lore.kernel.org/kvmarm/20230526234435.662652-1-yuz...@google.com/
[4]: https://lore.kernel.org/all/zitx64bbx5vdj...@google.com/
James Houghton (5):
mm: Add a bitmap into mmu_notifier_{clear,test}_young
KVM: Move MMU notifier function declarations
KVM: Add basic bitmap support into kvm
To allow new MMU-notifier-related functions to use gfn_to_hva_memslot(),
move some declarations around.
Also move mmu_notifier_to_kvm() for wider use later.
Signed-off-by: James Houghton
---
include/linux/kvm_host.h | 41 +---
virt/kvm/kvm_main.c | 5
[1]: https://lore.kernel.org/all/20230609005935.42390-1-yuz...@google.com/
Suggested-by: Yu Zhao
Signed-off-by: James Houghton
---
include/linux/mmu_notifier.h | 93 +---
include/trace/events/kvm.h | 13 +++--
mm/mmu_notifier.c| 20 +---
virt/kvm/
d_age().
Suggested-by: Yu Zhao
Signed-off-by: James Houghton
---
include/linux/kvm_host.h | 60 ++
virt/kvm/kvm_main.c | 92 +---
2 files changed, 127 insertions(+), 25 deletions(-)
diff --git a/include/linux/kvm_host.h b/include/
From: Yu Zhao
tdp_mmu_enabled and shadow_accessed_mask are needed to implement
kvm_arch_prepare_bitmap_age().
Signed-off-by: Yu Zhao
Signed-off-by: James Houghton
---
arch/x86/include/asm/kvm_host.h | 6 ++
arch/x86/kvm/mmu.h | 6 --
arch/x86/kvm/mmu/spte.h | 1
Only handle the TDP MMU case for now. In other cases, if a bitmap was
not provided, fallback to the slowpath that takes mmu_lock, or, if a
bitmap was provided, inform the caller that the bitmap is unreliable.
Suggested-by: Yu Zhao
Signed-off-by: James Houghton
---
arch/x86/include/asm
ed-in bitmap.
When mkold == true, only age the pages that need aging according to the
passed-in bitmap.
Suggested-by: Yu Zhao
Signed-off-by: James Houghton
---
arch/arm64/include/asm/kvm_host.h| 5 +
arch/arm64/include/asm/kvm_pgtable.h | 4 +++-
arch/arm64/kvm/hyp/pgtable.c
m: rmap: Don't flush TLB after checking PTE young for page
reference" was included so that the comparison is apples to
apples.
https://lore.kernel.org/r/20220706112041.3831-1-21cn...@gmail.com/
Signed-off-by: Yu Zhao
Signed-off-by: James Houghton
---
Documentation/admin-g
Ah, I didn't see this in my inbox, sorry David!
On Thu, Apr 4, 2024 at 11:52 AM David Hildenbrand wrote:
>
> On 02.04.24 01:29, James Houghton wrote:
> > diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h
> > index f349e08a9dfe..daaa9db625d3 100644
On Tue, Apr 9, 2024 at 12:35 PM David Hildenbrand wrote:
>
> On 09.04.24 20:31, James Houghton wrote:
> > Ah, I didn't see this in my inbox, sorry David!
>
> No worries :)
>
> >
> > On Thu, Apr 4, 2024 at 11:52 AM David Hildenbrand wrote:
> >&g
On Fri, Apr 12, 2024 at 11:45 AM David Matlack wrote:
>
> On 2024-04-01 11:29 PM, James Houghton wrote:
> > The bitmap is provided for secondary MMUs to use if they support it. For
> > test_young(), after it returns, the bitmap represents the pages that
> > were young in
On Fri, Apr 12, 2024 at 1:28 PM David Matlack wrote:
>
> On 2024-04-01 11:29 PM, James Houghton wrote:
> > Add kvm_arch_prepare_bitmap_age() for architectures to indiciate that
> > they support bitmap-based aging in kvm_mmu_notifier_test_clear_young()
> > and that they do
On Thu, Apr 11, 2024 at 10:28 AM David Matlack wrote:
>
> On 2024-04-11 10:08 AM, David Matlack wrote:
> > On 2024-04-01 11:29 PM, James Houghton wrote:
> > > Only handle the TDP MMU case for now. In other cases, if a bitmap was
> > > not provided, fallback to the sl
On Fri, Apr 12, 2024 at 1:44 PM David Matlack wrote:
>
> On 2024-04-01 11:29 PM, James Houghton wrote:
> > Only handle the TDP MMU case for now. In other cases, if a bitmap was
> > not provided, fallback to the slowpath that takes mmu_lock, or, if a
> > bitmap was provided
On Fri, Apr 12, 2024 at 11:41 AM David Matlack wrote:
>
> On 2024-04-01 11:29 PM, James Houghton wrote:
> > This patchset adds a fast path in KVM to test and clear access bits on
> > sptes without taking the mmu_lock. It also adds support for using a
> > bitmap to (1)
On Fri, Apr 19, 2024 at 2:07 PM David Matlack wrote:
>
> On 2024-04-19 01:47 PM, James Houghton wrote:
> > On Thu, Apr 11, 2024 at 10:28 AM David Matlack wrote:
> > > On 2024-04-11 10:08 AM, David Matlack wrote:
> > > bool kvm_age_gfn(struct kvm *kv
On Mon, Mar 3, 2025 at 1:29 PM Peter Xu wrote:
>
> On Mon, Mar 03, 2025 at 01:30:06PM +, Nikita Kalyazin wrote:
> > This series is built on top of the v3 write syscall support [1].
> >
> > With James's KVM userfault [2], it is possible to handle stage-2 faults
> > in guest_memfd in userspace.
On Mon, Mar 24, 2025 at 6:57 PM Maxim Levitsky wrote:
>
> Add an option to skip sanity check of number of still idle pages,
> and set it by default to skip, in case hypervisor or NUMA balancing
> is detected.
>
> Signed-off-by: Maxim Levitsky
Thanks Maxim! I'm still working on a respin of this t
On Wed, Mar 26, 2025 at 11:41 AM Sean Christopherson wrote:
>
> On Tue, Mar 25, 2025, James Houghton wrote:
> > On Mon, Mar 24, 2025 at 6:57 PM Maxim Levitsky wrote:
> > >
> > > Add an option to skip sanity check of number of still idle pages,
> > >
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