; On Sat, Jan 14, 2023 at 12:37:59AM +,
> > > > Sean Christopherson wrote:
> > > >
> > > > > On Fri, Dec 02, 2022, Chao Peng wrote:
> > > > > > This patch series implements KVM guest private memory for
> > > > > > c
On Fri, Mar 24, 2023 at 10:29:25AM +0800, Xiaoyao Li wrote:
> On 3/24/2023 10:10 AM, Chao Peng wrote:
> > On Wed, Mar 22, 2023 at 05:41:31PM -0700, Isaku Yamahata wrote:
> > > On Wed, Mar 08, 2023 at 03:40:26PM +0800,
> > > Chao Peng wrote:
> > >
> > &g
On Wed, Mar 22, 2023 at 08:27:37PM -0500, Michael Roth wrote:
> On Tue, Feb 21, 2023 at 08:11:35PM +0800, Chao Peng wrote:
> > > Hi Sean,
> > >
> > > We've rebased the SEV+SNP support onto your updated UPM base support
> > > tree and things seem to be
On Wed, Mar 22, 2023 at 05:41:31PM -0700, Isaku Yamahata wrote:
> On Wed, Mar 08, 2023 at 03:40:26PM +0800,
> Chao Peng wrote:
>
> > On Wed, Mar 08, 2023 at 12:13:24AM +, Ackerley Tng wrote:
> > > Chao Peng writes:
> > >
> > > > On Sat, Jan 14,
On Wed, Mar 08, 2023 at 12:13:24AM +, Ackerley Tng wrote:
> Chao Peng writes:
>
> > On Sat, Jan 14, 2023 at 12:01:01AM +, Sean Christopherson wrote:
> > > On Fri, Dec 02, 2022, Chao Peng wrote:
> > ...
> > > Strongly prefer to use similar logic
> > int restrictedmem_bind(struct file *file, pgoff_t start, pgoff_t end,
> >struct restrictedmem_notifier *notifier, bool exclusive)
> > {
> > struct restrictedmem *rm = file->f_mapping->private_data;
> > int ret = -EINVAL;
> >
> > down_write(>lock);
> >
> >
> Hi Sean,
>
> We've rebased the SEV+SNP support onto your updated UPM base support
> tree and things seem to be working okay, but we needed some fixups on
> top of the base support get things working, along with 1 workaround
> for an issue that hasn't been root-caused yet:
>
>
On Sat, Jan 14, 2023 at 12:01:01AM +, Sean Christopherson wrote:
> On Fri, Dec 02, 2022, Chao Peng wrote:
...
> Strongly prefer to use similar logic to existing code that detects wraps:
>
> mem->restricted_offset + mem->memory_size <
> mem->restrict
On Fri, Jan 13, 2023 at 11:16:27PM +, Sean Christopherson wrote:
> On Fri, Dec 02, 2022, Chao Peng wrote:
> > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> > index 9a07380f8d3c..5aefcff614d2 100644
> > --- a/arch/x86/kvm/x86.c
> > +++ b/arch/x86/kvm/x86
On Tue, Jan 17, 2023 at 07:35:58PM +, Sean Christopherson wrote:
> On Tue, Jan 17, 2023, Chao Peng wrote:
> > On Sat, Jan 14, 2023 at 12:01:01AM +, Sean Christopherson wrote:
> > > On Fri, Dec 02, 2022, Chao Peng wrote:
> > > > @@ -10357,6 +10364,12 @@ stat
On Tue, Jan 17, 2023 at 04:34:15PM +, Sean Christopherson wrote:
> On Tue, Jan 17, 2023, Chao Peng wrote:
> > On Fri, Jan 13, 2023 at 09:54:41PM +, Sean Christopherson wrote:
> > > > + list_for_each_entry(notifier, >notifiers, list) {
> > >
On Tue, Jan 17, 2023 at 11:21:10AM +0800, Binbin Wu wrote:
>
> On 12/2/2022 2:13 PM, Chao Peng wrote:
> > In confidential computing usages, whether a page is private or shared is
> > necessary information for KVM to perform operations like page fault
> > ha
On Sat, Jan 14, 2023 at 12:37:59AM +, Sean Christopherson wrote:
> On Fri, Dec 02, 2022, Chao Peng wrote:
> > This patch series implements KVM guest private memory for confidential
> > computing scenarios like Intel TDX[1]. If a TDX host accesses
> > TDX-protected guest
On Sat, Jan 14, 2023 at 12:01:01AM +, Sean Christopherson wrote:
> On Fri, Dec 02, 2022, Chao Peng wrote:
> > @@ -10357,6 +10364,12 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
> >
> > if (kvm_check_request(KVM_REQ_UPDATE_CP
On Fri, Jan 13, 2023 at 10:37:39PM +, Sean Christopherson wrote:
> On Tue, Jan 10, 2023, Chao Peng wrote:
> > On Mon, Jan 09, 2023 at 07:32:05PM +, Sean Christopherson wrote:
> > > On Fri, Jan 06, 2023, Chao Peng wrote:
> > > > On Thu, Jan 05, 2023 at 11:
On Fri, Jan 13, 2023 at 09:54:41PM +, Sean Christopherson wrote:
> On Fri, Dec 02, 2022, Chao Peng wrote:
> > The system call is currently wired up for x86 arch.
>
> Building on other architectures (except for arm64 for some reason) yields:
>
> CALL/.../scr
On Mon, Jan 09, 2023 at 07:32:05PM +, Sean Christopherson wrote:
> On Fri, Jan 06, 2023, Chao Peng wrote:
> > On Thu, Jan 05, 2023 at 11:23:01AM +, Jarkko Sakkinen wrote:
> > > On Fri, Dec 02, 2022 at 02:13:41PM +0800, Chao Peng wrote:
> > > > To make futur
On Thu, Jan 05, 2023 at 11:23:01AM +, Jarkko Sakkinen wrote:
> On Fri, Dec 02, 2022 at 02:13:41PM +0800, Chao Peng wrote:
> > In memory encryption usage, guest memory may be encrypted with special
> > key and can be accessed only by the guest itself. We call such memory
>
On Thu, Jan 05, 2023 at 12:38:30PM -0800, Vishal Annapurve wrote:
> On Thu, Dec 1, 2022 at 10:20 PM Chao Peng wrote:
> >
> > +#ifdef CONFIG_HAVE_KVM_RESTRICTED_MEM
> > +static bool restrictedmem_range_is_valid(struct kvm_memory_slot *slot,
> > +
On Tue, Jan 03, 2023 at 11:06:37PM +, Sean Christopherson wrote:
> On Tue, Jan 03, 2023, Wang, Wei W wrote:
> > On Tuesday, January 3, 2023 9:40 AM, Chao Peng wrote:
> > > > Because guest memory defaults to private, and now this patch stores
&
On Wed, Dec 28, 2022 at 04:28:01PM +0800, Chenyi Qiang wrote:
...
> > +static int kvm_vm_ioctl_set_mem_attributes(struct kvm *kvm,
> > + struct kvm_memory_attributes *attrs)
> > +{
> > + gfn_t start, end;
> > + unsigned long i;
> > + void *entry;
> > +
On Thu, Dec 22, 2022 at 06:15:24PM +, Sean Christopherson wrote:
> On Wed, Dec 21, 2022, Chao Peng wrote:
> > On Tue, Dec 20, 2022 at 08:33:05AM +, Huang, Kai wrote:
> > > On Tue, 2022-12-20 at 15:22 +0800, Chao Peng wrote:
> > > > On Mon, Dec 19, 2022 at 08:4
On Thu, Dec 22, 2022 at 12:37:19AM +, Huang, Kai wrote:
> On Wed, 2022-12-21 at 21:39 +0800, Chao Peng wrote:
> > > On Tue, Dec 20, 2022 at 08:33:05AM +, Huang, Kai wrote:
> > > > > On Tue, 2022-12-20 at 15:22 +0800, Chao Peng wrote:
> > > > > &g
On Tue, Dec 20, 2022 at 10:55:44AM +0100, Borislav Petkov wrote:
> On Tue, Dec 20, 2022 at 03:43:18PM +0800, Chao Peng wrote:
> > RESTRICTEDMEM is needed by TDX_HOST, not TDX_GUEST.
>
> Which basically means that RESTRICTEDMEM should simply depend on KVM.
> Because you can't kn
On Tue, Dec 20, 2022 at 08:33:05AM +, Huang, Kai wrote:
> On Tue, 2022-12-20 at 15:22 +0800, Chao Peng wrote:
> > On Mon, Dec 19, 2022 at 08:48:10AM +, Huang, Kai wrote:
> > > On Mon, 2022-12-19 at 15:53 +080
On Mon, Dec 19, 2022 at 03:36:28PM +0100, Borislav Petkov wrote:
> On Fri, Dec 02, 2022 at 02:13:41PM +0800, Chao Peng wrote:
> > In memory encryption usage, guest memory may be encrypted with special
> > key and can be accessed only by the guest itself. We call such memory
>
On Mon, Dec 19, 2022 at 11:17:22AM +0100, Borislav Petkov wrote:
> On Mon, Dec 19, 2022 at 04:15:32PM +0800, Chao Peng wrote:
> > Tamping down with error number a bit:
> >
> > if (attrs->flags)
> > return -ENXIO;
> > if (
On Mon, Dec 19, 2022 at 08:48:10AM +, Huang, Kai wrote:
> On Mon, 2022-12-19 at 15:53 +0800, Chao Peng wrote:
> > >
> > > [...]
> > >
> > > > +
> > > > + /*
> > > > +* These pages are currently unmovable so d
On Fri, Dec 16, 2022 at 04:09:06PM +0100, Borislav Petkov wrote:
> On Fri, Dec 02, 2022 at 02:13:40PM +0800, Chao Peng wrote:
> > diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
> > index 1782c4555d94..7f0f5e9f2406 100644
> > --- a/virt/kvm/kvm_main.c
> >
On Tue, Dec 13, 2022 at 08:04:14PM +0800, Xiaoyao Li wrote:
> On 12/8/2022 7:30 PM, Chao Peng wrote:
> > On Thu, Dec 08, 2022 at 04:37:03PM +0800, Xiaoyao Li wrote:
> > > On 12/2/2022 2:13 PM, Chao Peng wrote:
> > >
> > > ..
> > >
&
On Tue, Dec 13, 2022 at 11:51:25PM +, Huang, Kai wrote:
> On Fri, 2022-12-02 at 14:13 +0800, Chao Peng wrote:
> >
> > - /* flags is currently not used. */
> > + /* 'flags' is currently not used. */
> > if (attrs->flags)
> > return
On Tue, Dec 13, 2022 at 11:49:13PM +, Huang, Kai wrote:
> >
> > memfd_restricted() itself is implemented as a shim layer on top of real
> > memory file systems (currently tmpfs). Pages in restrictedmem are marked
> > as unmovable and unevictable, this is required for current confidential
> >
On Fri, Dec 09, 2022 at 09:01:04AM +, Fuad Tabba wrote:
> Hi,
>
> On Fri, Dec 2, 2022 at 6:19 AM Chao Peng wrote:
> >
> > A KVM_MEM_PRIVATE memslot can include both fd-based private memory and
> > hva-based shared memory. Architecture code (like TDX code) can te
On Fri, Dec 09, 2022 at 08:57:31AM +, Fuad Tabba wrote:
> Hi,
>
> On Thu, Dec 8, 2022 at 11:18 AM Chao Peng wrote:
> >
> > On Wed, Dec 07, 2022 at 05:16:34PM +, Fuad Tabba wrote:
> > > Hi,
> > >
> > > On Fri, Dec 2, 2022 at 6:19 A
On Tue, Dec 06, 2022 at 03:48:50PM +, Fuad Tabba wrote:
...
> >
> > > > */
> > > > - if (unlikely(kvm->mmu_invalidate_in_progress) &&
> > > > - hva >= kvm->mmu_invalidate_range_start &&
> > > > - hva < kvm->mmu_invalidate_range_end)
> > > > -
On Thu, Dec 08, 2022 at 04:37:03PM +0800, Xiaoyao Li wrote:
> On 12/2/2022 2:13 PM, Chao Peng wrote:
>
> ..
>
> > Together with the change, a new config HAVE_KVM_RESTRICTED_MEM is added
> > and right now it is selected on X86_64 only.
> >
>
> From the patc
On Thu, Dec 08, 2022 at 10:29:18AM +0800, Yuan Yao wrote:
> On Fri, Dec 02, 2022 at 02:13:46PM +0800, Chao Peng wrote:
> > A KVM_MEM_PRIVATE memslot can include both fd-based private memory and
> > hva-based shared memory. Architecture code (like TDX code) can tell
> > wheth
On Wed, Dec 07, 2022 at 04:13:14PM +0800, Yuan Yao wrote:
> On Fri, Dec 02, 2022 at 02:13:44PM +0800, Chao Peng wrote:
> > Unmap the existing guest mappings when memory attribute is changed
> > between shared and private. This is needed because shared pages and
> > private pag
On Tue, Dec 06, 2022 at 10:42:24PM -0800, Isaku Yamahata wrote:
> On Tue, Dec 06, 2022 at 08:02:24PM +0800,
> Chao Peng wrote:
>
> > On Mon, Dec 05, 2022 at 02:49:59PM -0800, Isaku Yamahata wrote:
> > > On Fri, Dec 02, 2022 at 02:13:45PM +0800,
> > > Chao Peng w
On Wed, Dec 07, 2022 at 05:16:34PM +, Fuad Tabba wrote:
> Hi,
>
> On Fri, Dec 2, 2022 at 6:19 AM Chao Peng wrote:
> >
> > Unmap the existing guest mappings when memory attribute is changed
> > between shared and private. This is needed because shared pages and
On Tue, Dec 06, 2022 at 10:34:11PM -0800, Isaku Yamahata wrote:
> On Tue, Dec 06, 2022 at 07:56:23PM +0800,
> Chao Peng wrote:
>
> > > > - if (unlikely(kvm->mmu_invalidate_in_progress) &&
> > > > - hva >= kvm->mmu_inval
On Tue, Dec 06, 2022 at 03:47:20PM +, Fuad Tabba wrote:
> Hi,
>
> On Fri, Dec 2, 2022 at 6:19 AM Chao Peng wrote:
> >
> > This new KVM exit allows userspace to handle memory-related errors. It
> > indicates an error happens in KVM at guest memory range [gpa, gpa+si
On Tue, Dec 06, 2022 at 12:39:18PM +, Fuad Tabba wrote:
> Hi Chao,
>
> On Tue, Dec 6, 2022 at 11:58 AM Chao Peng wrote:
> >
> > On Mon, Dec 05, 2022 at 09:03:11AM +, Fuad Tabba wrote:
> > > Hi Chao,
> > >
> > > On Fri
On Tue, Dec 06, 2022 at 03:07:27PM +, Fuad Tabba wrote:
> Hi,
>
> On Fri, Dec 2, 2022 at 6:18 AM Chao Peng wrote:
> >
> > In confidential computing usages, whether a page is private or shared is
> > necessary information for KVM to perform operations like pa
On Tue, Dec 06, 2022 at 10:34:32AM -0300, Fabiano Rosas wrote:
> Chao Peng writes:
>
> > 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
On Tue, Dec 06, 2022 at 02:57:04PM +, Fuad Tabba wrote:
> Hi,
>
> On Fri, Dec 2, 2022 at 6:18 AM Chao Peng wrote:
> >
> > From: "Kirill A. Shutemov"
> >
> > Introduce 'memfd_restricted' system call with the ability to create
> > memory areas
On Mon, Dec 05, 2022 at 02:49:59PM -0800, Isaku Yamahata wrote:
> On Fri, Dec 02, 2022 at 02:13:45PM +0800,
> Chao Peng wrote:
>
> > A large page with mixed private/shared subpages can't be mapped as large
> > page since its sub private/shared pages are from different memory
On Mon, Dec 05, 2022 at 09:23:49AM +, Fuad Tabba wrote:
> Hi Chao,
>
> On Fri, Dec 2, 2022 at 6:19 AM Chao Peng wrote:
> >
> > Currently in mmu_notifier invalidate path, hva range is recorded and
> > then checked against by mmu_notifier_retry_hva() in the p
On Mon, Dec 05, 2022 at 09:03:11AM +, Fuad Tabba wrote:
> Hi Chao,
>
> On Fri, Dec 2, 2022 at 6:18 AM Chao Peng wrote:
> >
> > In memory encryption usage, guest memory may be encrypted with special
> > key and can be accessed only by the guest itself. We call suc
On Thu, Dec 01, 2022 at 06:16:46PM -0800, Vishal Annapurve wrote:
> On Tue, Oct 25, 2022 at 8:18 AM Chao Peng wrote:
> >
...
> > +}
> > +
> > +SYSCALL_DEFINE1(memfd_restricted, unsigned int, flags)
> > +{
>
> Looking at the underlying shmem implementatio
.
- KVM_GET_SUPPORTED_MEMORY_ATTRIBUTES to return the KVM supported
memory attributes.
KVM internally uses xarray to store the per-page memory attributes.
Suggested-by: Sean Christopherson
Signed-off-by: Chao Peng
Link: https://lore.kernel.org/all/y2wb48kd0j4vg...@google.com/
---
Documentation/virt/kvm/api.rst | 63
subpages and update
this 'mixed' bit whenever the memory attribute is changed between
private and shared.
Signed-off-by: Chao Peng
---
arch/x86/include/asm/kvm_host.h | 8 ++
arch/x86/kvm/mmu/mmu.c | 134 +++-
arch/x86/kvm/x86.c | 2
Signed-off-by: Yu Zhang
Signed-off-by: Chao Peng
Reviewed-by: Fuad Tabba
---
arch/x86/include/asm/kvm_host.h | 1 +
arch/x86/kvm/x86.c | 13 +++
include/linux/kvm_host.h| 3 +
virt/kvm/kvm_main.c | 179 +++-
4 files changed, 191
page state, invoke kvm_mmu_invalidate_* helpers to let the
page fault handler retry during this time frame.
Signed-off-by: Chao Peng
---
include/linux/kvm_host.h | 7 +-
virt/kvm/kvm_main.c | 168 ++-
2 files changed, 116 insertions(+), 59 deletions
the normal and the
'_ext' variants.
Co-developed-by: Yu Zhang
Signed-off-by: Yu Zhang
Signed-off-by: Chao Peng
Reviewed-by: Fuad Tabba
Tested-by: Fuad Tabba
---
Documentation/virt/kvm/api.rst | 40 ++-
arch/x86/kvm/Kconfig | 2 ++
arch/x86/kvm/x86.c
Zhang
Signed-off-by: Chao Peng
---
arch/x86/kvm/mmu/mmu.c | 63 +++--
arch/x86/kvm/mmu/mmu_internal.h | 14 +++-
arch/x86/kvm/mmu/mmutrace.h | 1 +
arch/x86/kvm/mmu/tdp_mmu.c | 2 +-
include/linux/kvm_host.h| 30
5 files
-by: Sean Christopherson
Signed-off-by: Chao Peng
---
arch/x86/kvm/mmu/mmu.c | 8 +---
include/linux/kvm_host.h | 33 +
virt/kvm/kvm_main.c | 32 +++-
3 files changed, 49 insertions(+), 24 deletions(-)
diff --git a/arch/x86/kvm
rspace for an implicit conversion when the page is in a
different state than requested (private or shared).
Suggested-by: Sean Christopherson
Co-developed-by: Yu Zhang
Signed-off-by: Yu Zhang
Signed-off-by: Chao Peng
Reviewed-by: Fuad Tabba
---
Documentation/virt/kvm/api.rs
48.200037-1-sea...@google.com/
[4] Selftest:
https://lore.kernel.org/all/2022014244.1714148-1-vannapu...@google.com/
Chao Peng (8):
KVM: Introduce per-page memory attributes
KVM: Extend the memslot to support fd-based private memory
KVM: Add KVM_EXIT_MEMORY_FAULT exit
KVM: Use gfn
restricted() prevents userspace read, write and mmap.
By defining new bit in the 'flags', it can be extended to support other
restricted semantics in the future.
The system call is currently wired up for x86 arch.
Signed-off-by: Kirill A. Shutemov
Signed-off-by: Chao Peng
---
arch/x86/entr
On Tue, Nov 29, 2022 at 01:18:15PM -0600, Michael Roth wrote:
> On Tue, Nov 29, 2022 at 01:06:58PM -0600, Michael Roth wrote:
> > On Tue, Nov 29, 2022 at 10:06:15PM +0800, Chao Peng wrote:
> > > On Mon, Nov 28, 2022 at 06:37:25PM -0600, Michael Roth wrote:
> > > >
On Mon, Nov 28, 2022 at 06:37:25PM -0600, Michael Roth wrote:
> On Tue, Oct 25, 2022 at 11:13:37PM +0800, Chao Peng wrote:
...
> > +static long restrictedmem_fallocate(struct file *file, int mode,
> > + loff_t offset, loff_t len)
> &
On Tue, Nov 29, 2022 at 12:39:06PM +0100, David Hildenbrand wrote:
> On 29.11.22 12:21, Kirill A. Shutemov wrote:
> > On Mon, Nov 28, 2022 at 06:06:32PM -0600, Michael Roth wrote:
> > > On Tue, Oct 25, 2022 at 11:13:37PM +0800, Chao Peng wrote:
> > >
On Tue, Nov 29, 2022 at 02:21:39PM +0300, Kirill A. Shutemov wrote:
> On Mon, Nov 28, 2022 at 06:06:32PM -0600, Michael Roth wrote:
> > On Tue, Oct 25, 2022 at 11:13:37PM +0800, Chao Peng wrote:
> > > From: "Kirill A. Shutemov"
> > >
>
On Fri, Nov 18, 2022 at 03:59:12PM +, Sean Christopherson wrote:
> On Fri, Nov 18, 2022, Alex Benn?e wrote:
> >
> > Chao Peng writes:
> >
> > > On Thu, Nov 17, 2022 at 03:08:17PM +, Alex Benn?e wrote:
> > >> >> I think this shoul
On Thu, Nov 17, 2022 at 03:08:17PM +, Alex Bennée wrote:
>
> Chao Peng writes:
>
> > On Wed, Nov 16, 2022 at 07:03:49PM +, Alex Bennée wrote:
> >>
> >> Chao Peng writes:
> >>
> >> > On Tue, Nov 15, 2022 at 04:56:12PM +,
On Wed, Nov 16, 2022 at 09:40:23AM +, Alex Bennée wrote:
>
> Chao Peng writes:
>
> > On Mon, Nov 14, 2022 at 11:43:37AM +, Alex Bennée wrote:
> >>
> >> Chao Peng writes:
> >>
> >>
> >> > Introduction
> >> >
On Wed, Nov 16, 2022 at 07:03:49PM +, Alex Bennée wrote:
>
> Chao Peng writes:
>
> > On Tue, Nov 15, 2022 at 04:56:12PM +, Alex Bennée wrote:
> >>
> >> Chao Peng writes:
> >>
> >> > This new KVM exit allows userspace to hand
On Wed, Nov 16, 2022 at 06:48:43PM +, Sean Christopherson wrote:
> On Wed, Nov 16, 2022, Andy Lutomirski wrote:
> >
> >
> > On Tue, Oct 25, 2022, at 8:13 AM, Chao Peng wrote:
> > > diff --git a/Documentation/virt/kvm/api.rst
> > > b/Documentation/vi
On Wed, Nov 16, 2022 at 10:13:07PM +, Sean Christopherson wrote:
> On Wed, Nov 16, 2022, Ackerley Tng wrote:
> > >@@ -4173,6 +4203,22 @@ static int kvm_faultin_pfn(struct kvm_vcpu *vcpu,
> > >struct kvm_page_fault *fault)
> > > return RET_PF_EMULATE;
> > > }
> > >
> > >+
On Wed, Nov 16, 2022 at 10:24:11PM +, Sean Christopherson wrote:
> On Tue, Oct 25, 2022, Chao Peng wrote:
> > +static int kvm_vm_ioctl_set_mem_attr(struct kvm *kvm, gpa_t gpa, gpa_t
> > size,
> > +bool is_private)
> >
On Mon, Nov 14, 2022 at 11:43:37AM +, Alex Bennée wrote:
>
> Chao Peng writes:
>
>
> > Introduction
> >
> > KVM userspace being able to crash the host is horrible. Under current
> > KVM architecture, all guest memory is inherent
On Tue, Nov 15, 2022 at 04:56:12PM +, Alex Bennée wrote:
>
> Chao Peng writes:
>
> > This new KVM exit allows userspace to handle memory-related errors. It
> > indicates an error happens in KVM at guest memory range [gpa, gpa+size).
> > The flags incl
v 01, 2022 at 07:37:29PM +0800, Chao Peng wrote:
> > > >> >
> > > >> > 1) restoring kernel directmap:
> > > >> >
> > > >> > Currently SNP (and I believe TDX) need to either split or
> > >
On Mon, Nov 14, 2022 at 04:04:59PM +, Alex Bennée wrote:
>
> Chao Peng writes:
>
> > In memory encryption usage, guest memory may be encrypted with special
> > key and can be accessed only by the guest itself. We call such memory
> > private memory. It's valuel
On Thu, Nov 10, 2022 at 08:06:33PM +, Sean Christopherson wrote:
> On Tue, Oct 25, 2022, Chao Peng wrote:
> > @@ -715,15 +715,9 @@ static void kvm_mmu_notifier_change_pte(struct
> > mmu_notifier *mn,
> > kvm_handle_hva_range(mn, address, address + 1,
On Tue, Nov 08, 2022 at 08:08:05PM +0800, Yuan Yao wrote:
> On Tue, Oct 25, 2022 at 11:13:42PM +0800, Chao Peng wrote:
> > When private/shared memory are mixed in a large page, the lpage_info may
> > not be accurate and should be updated with this mixed info. A large page
> >
On Tue, Nov 08, 2022 at 09:35:06AM +0800, Yuan Yao wrote:
> On Tue, Oct 25, 2022 at 11:13:41PM +0800, Chao Peng wrote:
> > Introduce generic private memory register/unregister by reusing existing
> > SEV ioctls KVM_MEMORY_ENCRYPT_{UN,}REG_REGION. It differs from SEV case
> >
On Fri, Nov 04, 2022 at 09:19:31PM +, Sean Christopherson wrote:
> Paolo, any thoughts before I lead things further astray?
>
> On Fri, Nov 04, 2022, Chao Peng wrote:
> > On Thu, Nov 03, 2022 at 11:04:53PM +, Sean Christopherson wrote:
> > > On Tue, Oct 2
On Fri, Nov 04, 2022 at 10:29:48PM +, Sean Christopherson wrote:
> On Fri, Nov 04, 2022, Chao Peng wrote:
> > On Thu, Oct 27, 2022 at 11:29:14AM +0100, Fuad Tabba wrote:
> > > Hi,
> > >
> > > On Tue, Oct 25, 2022 at 4:19 PM Chao Peng
> > > wro
On Thu, Nov 03, 2022 at 11:04:53PM +, Sean Christopherson wrote:
> On Tue, Oct 25, 2022, Chao Peng wrote:
> > @@ -4708,6 +4802,24 @@ static long kvm_vm_ioctl(struct file *filp,
> > r = kvm_vm_ioctl_set_memory_region(kvm, );
> > break;
On Thu, Oct 27, 2022 at 11:29:14AM +0100, Fuad Tabba wrote:
> Hi,
>
> On Tue, Oct 25, 2022 at 4:19 PM Chao Peng wrote:
> >
> > Currently in mmu_notifier validate path, hva range is recorded and then
> > checked against in the mmu_notifier_retry_hva() of the p
On Tue, Nov 01, 2022 at 02:30:58PM -0500, Michael Roth wrote:
> On Tue, Nov 01, 2022 at 10:19:44AM -0500, Michael Roth wrote:
> > On Tue, Nov 01, 2022 at 07:37:29PM +0800, Chao Peng wrote:
> > > On Mon, Oct 31, 2022 at 12:47:38PM -0500, Michael Roth wrote:
> > > >
On Mon, Oct 31, 2022 at 05:02:50PM -0700, Isaku Yamahata wrote:
> On Fri, Oct 28, 2022 at 02:55:45PM +0800,
> Chao Peng wrote:
>
> > On Wed, Oct 26, 2022 at 02:54:25PM -0700, Isaku Yamahata wrote:
> > > On Tue, Oct 25, 2022 at 11:13:43PM +0800,
> > > Chao Peng
On Mon, Oct 31, 2022 at 12:47:38PM -0500, Michael Roth wrote:
> On Tue, Oct 25, 2022 at 11:13:37PM +0800, Chao Peng wrote:
> > From: "Kirill A. Shutemov"
> >
> > Introduce 'memfd_restricted' system call with the ability to create
> > memory areas that are res
On Fri, Oct 28, 2022 at 03:04:27PM +0800, Xiaoyao Li wrote:
> On 10/25/2022 11:13 PM, Chao Peng wrote:
> > In memory encryption usage, guest memory may be encrypted with special
> > key and can be accessed only by the guest itself. We call such memory
> > private m
On Wed, Oct 26, 2022 at 10:31:45AM -0700, Isaku Yamahata wrote:
> On Tue, Oct 25, 2022 at 11:13:37PM +0800,
> Chao Peng wrote:
>
> > +int restrictedmem_get_page(struct file *file, pgoff_t offset,
> > + struct page **pagep, int *order)
> > +{
> &
On Wed, Oct 26, 2022 at 02:54:25PM -0700, Isaku Yamahata wrote:
> On Tue, Oct 25, 2022 at 11:13:43PM +0800,
> Chao Peng wrote:
>
> > A memslot with KVM_MEM_PRIVATE being set can include both fd-based
> > private memory and hva-based shared memory. Architecture code (like T
On Wed, Oct 26, 2022 at 01:46:20PM -0700, Isaku Yamahata wrote:
> On Tue, Oct 25, 2022 at 11:13:42PM +0800,
> Chao Peng wrote:
>
> > When private/shared memory are mixed in a large page, the lpage_info may
> > not be accurate and should be updated with this mixed info. A lar
On Thu, Oct 27, 2022 at 11:27:05AM +0100, Fuad Tabba wrote:
> Hi,
>
> On Tue, Oct 25, 2022 at 4:19 PM Chao Peng wrote:
> >
> > This new KVM exit allows userspace to handle memory-related errors. It
> > indicates an error happens in KVM at guest memory range [gp
Signed-off-by: Kirill A. Shutemov
Signed-off-by: Chao Peng
---
arch/x86/entry/syscalls/syscall_32.tbl | 1 +
arch/x86/entry/syscalls/syscall_64.tbl | 1 +
include/linux/restrictedmem.h | 62 ++
include/linux/syscalls.h | 1 +
include/uapi/asm-generic/unistd.h | 5 +
fixes a bug in kvm_zap_gfn_range() which has already been using
gfn when calling kvm_mmu_invalidate_begin/end() while these functions
accept hva in current code.
Signed-off-by: Chao Peng
---
arch/x86/kvm/mmu/mmu.c | 2 +-
include/linux/kvm_host.h | 18 +++-
virt/kvm/kvm_main.c
.kernel.org/all/20220819174659.2427983-1-vannapu...@google.com/
Chao Peng (7):
KVM: Extend the memslot to support fd-based private memory
KVM: Add KVM_EXIT_MEMORY_FAULT exit
KVM: Use gfn instead of hva for mmu_notifier_retry
KVM: Register/unregister the guest private memory regions
KVM: Update lpage in
-by: Yu Zhang
Signed-off-by: Yu Zhang
Signed-off-by: Chao Peng
---
arch/x86/kvm/mmu/mmu.c | 56 +++--
arch/x86/kvm/mmu/mmu_internal.h | 14 -
arch/x86/kvm/mmu/mmutrace.h | 1 +
arch/x86/kvm/mmu/spte.h | 6
arch/x86/kvm/mmu/tdp_mmu.c
to do the zapping.
Co-developed-by: Yu Zhang
Signed-off-by: Yu Zhang
Signed-off-by: Chao Peng
---
include/linux/kvm_host.h | 3 +-
virt/kvm/kvm_main.c | 174 +--
2 files changed, 171 insertions(+), 6 deletions(-)
diff --git a/include/linux/kvm_host.h b
which supports KVM_PRIVATE_MEM should override this function.
KVM internally defaults all guest memory as private memory and maintain
the shared memory in 'mem_attr_array'. The above ioctls operate on this
field and unmap existing mappings if any.
Signed-off-by: Chao Peng
---
Documentation/virt
private/share pages.
Signed-off-by: Chao Peng
---
arch/x86/include/asm/kvm_host.h | 8 +++
arch/x86/kvm/mmu/mmu.c | 112 +++-
arch/x86/kvm/x86.c | 2 +
include/linux/kvm_host.h| 19 ++
virt/kvm/kvm_main.c | 16 +++--
5
a binary compatible
alias struct kvm_user_mem_region to handle both the normal and the
'_ext' variants.
Co-developed-by: Yu Zhang
Signed-off-by: Yu Zhang
Signed-off-by: Chao Peng
---
Documentation/virt/kvm/api.rst | 48 -
arch/x86/kvm/Kconfig | 2 ++
arch/x86
rspace for an implicit conversion when the page is in a
different state than requested (private or shared).
Suggested-by: Sean Christopherson
Co-developed-by: Yu Zhang
Signed-off-by: Yu Zhang
Signed-off-by: Chao Peng
---
Documentation/virt/kvm/api.rst | 23 +++
include/uapi
> wrote:
> > > >
> > > > On Mon, Oct 17, 2022 at 06:39:06PM +0200, Gupta, Pankaj wrote:
> > > > > On 10/17/2022 6:19 PM, Kirill A . Shutemov wrote:
> > > > > > On Mon, Oct 17, 2022 at 03:00:21PM +0200, Vlastimil Babka wrot
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