On 6/19/2026 8:31 AM, Ackerley Tng via B4 Relay wrote: > From: Sean Christopherson <[email protected]> > > Bury KVM_VM_MEMORY_ATTRIBUTES in x86 to discourage other architectures > from adding support for per-VM memory attributes, because tracking private > vs. shared memory on a per-VM basis is now deprecated in favor of tracking > on a per-guest_memfd basis, and while RWX memory attributes are on the > horizon, they too are expected to be x86-only. > > This will also allow modifying KVM_VM_MEMORY_ATTRIBUTES to be > user-selectable (in x86) without creating weirdness in KVM's Kconfigs. > Now that guest_memfd supports in-place conversions, it's entirely possible > to run x86 CoCo VMs without support for KVM_VM_MEMORY_ATTRIBUTES. > > Leave the code itself in common KVM so that it's trivial to undo this > change if new per-VM attributes do come along. > > Signed-off-by: Sean Christopherson <[email protected]> > Reviewed-by: Fuad Tabba <[email protected]> > Signed-off-by: Ackerley Tng <[email protected]>
Reviewed-by: Binbin Wu <[email protected]> > --- > arch/x86/kvm/Kconfig | 3 +++ > virt/kvm/Kconfig | 3 --- > 2 files changed, 3 insertions(+), 3 deletions(-) > > diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig > index 26f6afd51bbdc..24f96396cfa1c 100644 > --- a/arch/x86/kvm/Kconfig > +++ b/arch/x86/kvm/Kconfig > @@ -80,6 +80,9 @@ config KVM_WERROR > > If in doubt, say "N". > > +config KVM_VM_MEMORY_ATTRIBUTES > + bool > + > config KVM_SW_PROTECTED_VM > bool "Enable support for KVM software-protected VMs" > depends on EXPERT > diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig > index 5119cb37145fc..297e4399fbd49 100644 > --- a/virt/kvm/Kconfig > +++ b/virt/kvm/Kconfig > @@ -100,9 +100,6 @@ config KVM_ELIDE_TLB_FLUSH_IF_YOUNG > config KVM_MMU_LOCKLESS_AGING > bool > > -config KVM_VM_MEMORY_ATTRIBUTES > - bool > - > config KVM_GUEST_MEMFD > select XARRAY_MULTI > bool >
