On Tue, Oct 31, 2023, David Matlack wrote:
> On 2023-10-27 11:21 AM, Sean Christopherson wrote:
> > Introduce an ioctl(), KVM_CREATE_GUEST_MEMFD, to allow creating file-based
> > memory that is tied to a specific KVM virtual machine and whose primary
> > purpose is to serve guest memory.
> >
> >
On Tue, Oct 31, 2023 at 11:13 PM Sean Christopherson wrote:
> On Tue, Oct 31, 2023, Fuad Tabba wrote:
> > On Fri, Oct 27, 2023 at 7:23 PM Sean Christopherson
> > wrote:
> Since we now know that at least pKVM will use guest_memfd for shared memory,
> and
> odds are quite good that "regular" VMs
On Tue, Oct 31, 2023 at 2:36 PM Sean Christopherson wrote:
> On Tue, Oct 31, 2023, David Matlack wrote:
> > On 2023-10-27 11:21 AM, Sean Christopherson wrote:
> > > Introduce an ioctl(), KVM_CREATE_GUEST_MEMFD, to allow creating file-based
> > > memory that is tied to a specific KVM virtual
On Tue, Oct 31, 2023, Fuad Tabba wrote:
> Hi,
>
> On Fri, Oct 27, 2023 at 7:23 PM Sean Christopherson wrote:
>
> ...
>
> > diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
> > index e2252c748fd6..e82c69d5e755 100644
> > --- a/Documentation/virt/kvm/api.rst
> > +++
On Tue, 31 Oct 2023 at 14:09, Sachin Sant wrote:
>
> Following warning is observed during boot of latest -next
> kernel (6.6.0-rc7-next-20231030 and todays -next) on IBM Power server.
>
> [ 0.085775] workingset: timestamp_bits=38 max_order=20 bucket_order=0
> [ 0.085801] zbud: loaded
> [
On 2023-10-27 11:21 AM, Sean Christopherson wrote:
> Introduce an ioctl(), KVM_CREATE_GUEST_MEMFD, to allow creating file-based
> memory that is tied to a specific KVM virtual machine and whose primary
> purpose is to serve guest memory.
>
> A guest-first memory subsystem allows for optimizations
On Tue, Oct 31, 2023 at 7:56 AM Bjorn Helgaas wrote:
>
> [+cc powerpc, clang folks]
>
> On Sat, Oct 28, 2023 at 08:22:54PM +0800, kernel test robot wrote:
> > tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git
> > controller/xilinx-xdma
> > branch HEAD:
Bjorn Helgaas wrote:
> On Tue, Oct 31, 2023 at 04:35:23AM +0800, kernel test robot wrote:
> > tree/branch:
> > https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> > branch HEAD: c503e3eec382ac708ee7adf874add37b77c5d312 Add linux-next
> > specific files for 20231030
> >
On Tue, Oct 31, 2023 at 09:59:29AM -0700, Nick Desaulniers wrote:
> On Tue, Oct 31, 2023 at 7:56 AM Bjorn Helgaas wrote:
> > On Sat, Oct 28, 2023 at 08:22:54PM +0800, kernel test robot wrote:
> > > tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git
> > >
Dan Williams wrote:
> Bjorn Helgaas wrote:
> > On Tue, Oct 31, 2023 at 04:35:23AM +0800, kernel test robot wrote:
> > > tree/branch:
> > > https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> > > branch HEAD: c503e3eec382ac708ee7adf874add37b77c5d312 Add linux-next
> > >
>+int kvm_gmem_create(struct kvm *kvm, struct kvm_create_guest_memfd *args)
>+{
>+ loff_t size = args->size;
>+ u64 flags = args->flags;
>+ u64 valid_flags = 0;
>+
>+ if (flags & ~valid_flags)
>+ return -EINVAL;
>+
>+ if (size < 0 || !PAGE_ALIGNED(size))
>+
Arnd Bergmann writes:
> From: Arnd Bergmann
>
> As discussed previously, a lot of the older wifi drivers are likely
> entirely unused, Though we can't know for sure.
>
> As suggested by both Greg and Jakub, let's remove the ones that look
> are most likely to have no users left and also get in
On 10/28/2023 2:21 AM, Sean Christopherson wrote:
Extended guest_memfd to allow backing guest memory with transparent
hugepages. Require userspace to opt-in via a flag even though there's no
known/anticipated use case for forcing small pages as THP is optional,
i.e. to avoid ending up in a
Christophe Leroy writes:
> pte_user() is now only used in pte_access_permitted() to check
> access on vmas. User flag is cleared to make a page unreadable.
>
> So rename it pte_read() and remove pte_user() which isn't used
> anymore.
>
> For the time being it checks _PAGE_USER but in the near
Following warning is observed during boot of latest -next
kernel (6.6.0-rc7-next-20231030 and todays -next) on IBM Power server.
[ 0.085775] workingset: timestamp_bits=38 max_order=20 bucket_order=0
[ 0.085801] zbud: loaded
[ 0.086473] [ cut here ]
[ 0.086477] WARNING:
On Tue, Oct 31, 2023 at 04:35:23AM +0800, kernel test robot wrote:
> tree/branch:
> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> branch HEAD: c503e3eec382ac708ee7adf874add37b77c5d312 Add linux-next
> specific files for 20231030
>
> Error/Warning reports:
> ...
On 2023-10-27 11:21 AM, Sean Christopherson wrote:
> From: Chao Peng
>
> diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
> index 89c1a991a3b8..df573229651b 100644
> --- a/include/linux/kvm_host.h
> +++ b/include/linux/kvm_host.h
> @@ -808,6 +809,9 @@ struct kvm {
>
> #ifdef
https://bugzilla.kernel.org/show_bug.cgi?id=206203
Erhard F. (erhar...@mailbox.org) changed:
What|Removed |Added
Status|REOPENED|RESOLVED
On Mon, 30 Oct 2023 11:26:48 -0500
Rob Herring wrote:
> The test tells you to expect a use-after-free...
>
> > ---[ end trace <> ]--- ### dt-test ### pass
> > of_unittest_lifecycle():3209
> > [ cut here ]
> > refcount_t: underflow; use-after-free.
>
> Then you get a
On Tue, Oct 31, 2023 at 09:56:00AM -0500, Bjorn Helgaas wrote:
> That said, the unused functions do look legit:
>
> grackle_set_stg() is a static function and the only call is under
> "#if 0".
It is a static inline. It is *normal* that that is uncalled. It is
very similar to a macro that has
[+cc powerpc, clang folks]
On Sat, Oct 28, 2023 at 08:22:54PM +0800, kernel test robot wrote:
> tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git
> controller/xilinx-xdma
> branch HEAD: 8d786149d78c7784144c7179e25134b6530b714b PCI: xilinx-xdma: Add
> Xilinx XDMA Root
Hi,
On Fri, Oct 27, 2023 at 7:23 PM Sean Christopherson wrote:
...
> diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
> index e2252c748fd6..e82c69d5e755 100644
> --- a/Documentation/virt/kvm/api.rst
> +++ b/Documentation/virt/kvm/api.rst
> @@ -6079,6 +6079,15 @@
On Tue, Oct 31, 2023, Xiaoyao Li wrote:
> On 10/28/2023 2:21 AM, Sean Christopherson wrote:
> > Introduce a "version 2" of KVM_SET_USER_MEMORY_REGION so that additional
> > information can be supplied without setting userspace up to fail. The
> > padding in the new kvm_userspace_memory_region2
On Tue, Oct 31, 2023, Chao Gao wrote:
> >+int kvm_gmem_create(struct kvm *kvm, struct kvm_create_guest_memfd *args)
> >+{
> >+loff_t size = args->size;
> >+u64 flags = args->flags;
> >+u64 valid_flags = 0;
> >+
> >+if (flags & ~valid_flags)
> >+return -EINVAL;
> >+
> >+
On Tue, Oct 31, 2023, Xiaoyao Li wrote:
> On 10/28/2023 2:21 AM, Sean Christopherson wrote:
> > Extended guest_memfd to allow backing guest memory with transparent
> > hugepages. Require userspace to opt-in via a flag even though there's no
> > known/anticipated use case for forcing small pages as
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