Hi Arnd,
On 10/24/23 at 03:17pm, Arnd Bergmann wrote:
> On Tue, Oct 24, 2023, at 14:44, Baoquan He wrote:
> > Just add people and mailing list to CC since I didn't find this mail in
> > my box, just drag it via 'b4 am'.
> >
> > On 10/23/23 at 01:01pm, Arnd Bergmann wrote:
> > ..
>
> >> diff -
On Thu, 2023-11-02 at 13:13 +1100, Finn Thain wrote:
> So I can't object to the removal of the localtalk code. But I do object to
> the underhand manner in which it is done.
I agree. I have the impression that the actual users of the affected code are
never asked. It's usually a question posed on
On Thu, 2023-11-02 at 03:17 +, Huang, Kai wrote:
> On Wed, 2023-11-01 at 10:36 -0700, Sean Christopherson wrote:
> > On Wed, Nov 01, 2023, Kai Huang wrote:
> > >
> > > > +7.34 KVM_CAP_MEMORY_FAULT_INFO
> > > > +--
> > > > +
> > > > +:Architectures: x86
> > > > +:Ret
On 11/2/23 04:01, Huang, Kai wrote:
On Fri, 2023-10-27 at 11:21 -0700, Sean Christopherson wrote:
From: Chao Peng
In confidential computing usages, whether a page is private or shared is
necessary information for KVM to perform operations like page fault
handling, page zapping etc. There are o
On Thu, 2023-11-02 at 11:32 +0100, Paolo Bonzini wrote:
> > > +#ifdef CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES
> > > +static inline unsigned long kvm_get_memory_attributes(struct kvm *kvm,
> > > gfn_t gfn)
> > > +{
> > > + return xa_to_value(xa_load(&kvm->mem_attr_array, gfn));
> > > +}
> >
> > Only
On 11/1/23 18:36, Sean Christopherson wrote:
A good example is KVM_RUN with -EINTR; if KVM were to return something other
than
-EINTR on a pending signal or vcpu->run->immediate_exit, userspace would fall
over.
And dually if KVM were to return KVM_EXIT_INTR together with something
other than
On 11/2/23 10:35, Huang, Kai wrote:
IIUC KVM can already handle the case of poisoned
page by sending signal to user app:
static int kvm_handle_error_pfn(struct kvm_vcpu *vcpu,
struct kvm_page_fault *fault)
{
...
if
On 11/2/23 06:59, Binbin Wu wrote:
Add flags to "struct kvm_gfn_range" to let notifier events target
only shared and only private mappings, and write up the existing
mmu_notifier events to be shared-only (private memory is never
associated with a userspace virtual address, i.e. can't be reached
Matthew Wilcox writes:
> On Tue, Oct 24, 2023 at 08:06:04PM +0530, Aneesh Kumar K.V wrote:
>> ptep++;
>> -pte = __pte(pte_val(pte) + (1UL << PTE_RPN_SHIFT));
>> addr += PAGE_SIZE;
>> +/*
>> + * increment the pfn.
>> + */
>>
There used to be a dependency on _PAGE_PRIVILEGED with pte_savedwrite.
But that got dropped by
commit 6a56ccbcf6c6 ("mm/autonuma: use can_change_(pte|pmd)_writable() to
replace savedwrite")
With this change numa fault pte (pte_protnone()) gets mapped as regular user pte
with RWX cleared (no-acces
On Wed, Nov 1, 2023 at 9:55 PM Sean Christopherson wrote:
>
> On Wed, Nov 01, 2023, Fuad Tabba wrote:
> > > > > @@ -1034,6 +1034,9 @@ static void kvm_destroy_dirty_bitmap(struct
> > > > > kvm_memory_slot *memslot)
> > > > > /* This does not remove the slot from struct kvm_memslots data
> > > >
On Fri, Oct 27, 2023 at 7:22 PM Sean Christopherson wrote:
>
> Handle AMD SEV's kvm_arch_guest_memory_reclaimed() hook by having
> __kvm_handle_hva_range() return whether or not an overlapping memslot
> was found, i.e. mmu_lock was acquired. Using the .on_unlock() hook
> works, but kvm_arch_guest
On Fri, Oct 27, 2023 at 7:22 PM Sean Christopherson wrote:
>
> Drop the .on_unlock() mmu_notifer hook now that it's no longer used for
> notifying arch code that memory has been reclaimed. Adding .on_unlock()
> and invoking it *after* dropping mmu_lock was a terrible idea, as doing so
> resulted
Hi,
On Fri, Oct 27, 2023 at 7:22 PM Sean Christopherson wrote:
>
> Add flags to "struct kvm_gfn_range" to let notifier events target only
> shared and only private mappings, and write up the existing mmu_notifier
> events to be shared-only (private memory is never associated with a
> userspace vi
On Fri, Oct 27, 2023 at 7:23 PM Sean Christopherson wrote:
>
> Initialize run->exit_reason to KVM_EXIT_UNKNOWN early in KVM_RUN to reduce
> the probability of exiting to userspace with a stale run->exit_reason that
> *appears* to be valid.
>
> To support fd-based guest memory (guest memory without
On Fri, Oct 27, 2023 at 7:23 PM Sean Christopherson wrote:
>
> From: Chao Peng
>
> Add support for resolving page faults on guest private memory for VMs
> that differentiate between "shared" and "private" memory. For such VMs,
> KVM_MEM_PRIVATE memslots can include both fd-based private memory a
On Fri, Oct 27, 2023 at 7:23 PM Sean Christopherson wrote:
>
> Drop __KVM_VCPU_MULTIPLE_ADDRESS_SPACE and instead check the value of
> KVM_ADDRESS_SPACE_NUM.
>
> No functional change intended.
>
> Reviewed-by: Paolo Bonzini
> Signed-off-by: Sean Christopherson
> ---
Reviewed-by: Fuad Tabba
Tes
On Thu, Nov 02, 2023, Fuad Tabba wrote:
> Hi,
>
> On Fri, Oct 27, 2023 at 7:22 PM Sean Christopherson wrote:
> >
> > Add flags to "struct kvm_gfn_range" to let notifier events target only
> > shared and only private mappings, and write up the existing mmu_notifier
> > events to be shared-only (pr
Hello,
There is a fbdev issue with the virtio-gpu-pci and virtio-vga. (The
penguins are not displayed at boot time)
Error message: [ 0.889302] virtio-pci :00:02.0: [drm] *ERROR*
fbdev: Failed to setup generic emulation (ret=-2)
The kernel 6.6 final doesn't have this issue.
Please c
On Thu, Nov 2, 2023 at 2:41 PM Sean Christopherson wrote:
>
> On Thu, Nov 02, 2023, Fuad Tabba wrote:
> > Hi,
> >
> > On Fri, Oct 27, 2023 at 7:22 PM Sean Christopherson
> > wrote:
> > >
> > > Add flags to "struct kvm_gfn_range" to let notifier events target only
> > > shared and only private ma
On Fri, Oct 27, 2023 at 7:23 PM Sean Christopherson wrote:
>
> Let x86 track the number of address spaces on a per-VM basis so that KVM
> can disallow SMM memslots for confidential VMs. Confidentials VMs are
> fundamentally incompatible with emulating SMM, which as the name suggests
> requires be
On Thu, Nov 02, 2023, Paolo Bonzini wrote:
> On Wed, Nov 1, 2023 at 11:35 PM Sean Christopherson wrote:
> >
> > On Wed, Nov 01, 2023, Paolo Bonzini wrote:
> > > On 11/1/23 17:36, Sean Christopherson wrote:
> > > > Can you post a fixup patch? It's not clear to me exactly what behavior
> > > > you
On Thu, Nov 02, 2023, Kai Huang wrote:
> On Wed, 2023-11-01 at 10:36 -0700, Sean Christopherson wrote:
> > On Wed, Nov 01, 2023, Kai Huang wrote:
> > >
> > > > +7.34 KVM_CAP_MEMORY_FAULT_INFO
> > > > +--
> > > > +
> > > > +:Architectures: x86
> > > > +:Returns: Informat
On 10/31/23 23:39, David Matlack wrote:
Maybe can you sketch out how you see this proposal being extensible to
using guest_memfd for shared mappings?
For in-place conversions, e.g. pKVM, no additional guest_memfd is needed.
What's
missing there is the ability to (safely) mmap() guest_memfd, e.
On Thu, Nov 02, 2023, Xiaoyao Li wrote:
> On 11/2/2023 1:36 AM, Sean Christopherson wrote:
> > > KVM_CAP_MEMORY_FAULT_INFO is x86 only, is it better to put this function
> > > to
> > > ?
> > I'd prefer to keep it in generic code, as it's highly likely to end up there
> > sooner than later. There'
On Thu, Nov 02, 2023, Paolo Bonzini wrote:
> On 11/2/23 10:35, Huang, Kai wrote:
> > IIUC KVM can already handle the case of poisoned
> > page by sending signal to user app:
> >
> > static int kvm_handle_error_pfn(struct kvm_vcpu *vcpu,
> > struct
> > kvm_page_fault *fault)
On Thu, Nov 2, 2023 at 9:03 AM Sean Christopherson wrote:
>
> On Thu, Nov 02, 2023, Paolo Bonzini wrote:
> > On 10/31/23 23:39, David Matlack wrote:
> > > > > Maybe can you sketch out how you see this proposal being extensible to
> > > > > using guest_memfd for shared mappings?
> > > > For in-plac
On Fri, Oct 27, 2023 at 11:21:57AM -0700, Sean Christopherson wrote:
> Export anon_inode_getfile_secure() so that it can be used by KVM to create
> and manage file-based guest memory without need a fullblow filesystem.
> The "standard" anon_inode_getfd() doesn't work for KVM's use case as KVM
> nee
On Tue, Oct 17, 2023 at 03:31:42PM -0400, Frank Li wrote:
> Since difference SoCs require different sequence for exiting L2, let's add
> a separate "exit_from_l2()" callback. This callback can be used to execute
> SoC specific sequence.
>
I missed the fact that this patch honors the return value
On Thu, Nov 2, 2023 at 4:38 PM Sean Christopherson wrote:
> Actually, looking that this again, there's not actually a hard dependency on
> THP.
> A THP-enabled kernel _probably_ gives a higher probability of using
> hugepages,
> but mostly because THP selects COMPACTION, and I suppose because u
On Tue, Oct 17, 2023 at 03:31:45PM -0400, Frank Li wrote:
> ls1043a add suspend/resume support.
> Implement ls1043a_pcie_send_turnoff_msg() to send PME_Turn_Off message.
> Implement ls1043a_pcie_exit_from_l2() to exit from L2 state.
>
Please use the suggestion I gave in patch 2/4.
> Signed-off-b
On Tue, Oct 17, 2023 at 03:31:44PM -0400, Frank Li wrote:
> 'pf' and 'lut' is just difference name in difference chips, but basic it is
> a MMIO base address plus an offset.
>
> Rename it to avoid duplicate pf_* and lut_* in driver.
>
"pci-layerscape-ep.c" uses "ls_lut_" prefix and now you are u
On Thu, Nov 02, 2023, Paolo Bonzini wrote:
> On 10/31/23 23:39, David Matlack wrote:
> > > > Maybe can you sketch out how you see this proposal being extensible to
> > > > using guest_memfd for shared mappings?
> > > For in-place conversions, e.g. pKVM, no additional guest_memfd is needed.
> > >
On Thu, Nov 02, 2023 at 10:28:08PM +0530, Manivannan Sadhasivam wrote:
> On Tue, Oct 17, 2023 at 03:31:42PM -0400, Frank Li wrote:
> > Since difference SoCs require different sequence for exiting L2, let's add
> > a separate "exit_from_l2()" callback. This callback can be used to execute
> > SoC sp
On Tue, Oct 17, 2023 at 03:31:43PM -0400, Frank Li wrote:
> ls1021a add suspend/resume support.
>
> Implement callback ls1021a_pcie_send_turnoff_msg(), which write scfg's
> SCFG_PEXPMWRCR to issue PME_Turn_off message.
>
> Implement ls1021a_pcie_exit_from_l2() to let controller exit L2 state.
>
On Thu, Nov 02, 2023 at 10:58:09PM +0530, Manivannan Sadhasivam wrote:
> On Tue, Oct 17, 2023 at 03:31:43PM -0400, Frank Li wrote:
> > ls1021a add suspend/resume support.
> >
> > Implement callback ls1021a_pcie_send_turnoff_msg(), which write scfg's
> > SCFG_PEXPMWRCR to issue PME_Turn_off message
On Thu, Nov 02, 2023 at 11:03:14PM +0530, Manivannan Sadhasivam wrote:
> On Tue, Oct 17, 2023 at 03:31:44PM -0400, Frank Li wrote:
> > 'pf' and 'lut' is just difference name in difference chips, but basic it is
> > a MMIO base address plus an offset.
> >
> > Rename it to avoid duplicate pf_* and l
On Thu, Nov 02, 2023, David Matlack wrote:
> On Thu, Nov 2, 2023 at 9:03 AM Sean Christopherson wrote:
> >
> > On Thu, Nov 02, 2023, Paolo Bonzini wrote:
> > > On 10/31/23 23:39, David Matlack wrote:
> > > > > > Maybe can you sketch out how you see this proposal being extensible
> > > > > > to
>
On Thu, Nov 02, 2023 at 11:09:00PM +0530, Manivannan Sadhasivam wrote:
> On Tue, Oct 17, 2023 at 03:31:45PM -0400, Frank Li wrote:
> > ls1043a add suspend/resume support.
> > Implement ls1043a_pcie_send_turnoff_msg() to send PME_Turn_Off message.
> > Implement ls1043a_pcie_exit_from_l2() to exit fr
On Thu, 2023-11-02 at 08:44 -0700, Sean Christopherson wrote:
> On Thu, Nov 02, 2023, Paolo Bonzini wrote:
> > On 11/2/23 10:35, Huang, Kai wrote:
> > > IIUC KVM can already handle the case of poisoned
> > > page by sending signal to user app:
> > >
> > > static int kvm_handle_error_pfn(struct k
On Fri, Oct 27, 2023 at 11:21:51AM -0700, Sean Christopherson wrote:
> --- a/Documentation/virt/kvm/api.rst
> +++ b/Documentation/virt/kvm/api.rst
> @@ -6723,6 +6723,26 @@ array field represents return values. The userspace
> should update the return
> values of SBI call before resuming the VCPU.
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256
Hi Linus,
Please pull powerpc updates for 6.7.
There's one conflict, where we added Documentation/powerpc/kvm-nested.rst while
upstream moved Documentation/powerpc to Documentation/arch/powerpc. Resolution
is just to add it in the new location.
ch
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