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 no other memory attributes are on the horizon.
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 support memory attributes, 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]> --- arch/x86/kvm/Kconfig | 4 ++++ virt/kvm/Kconfig | 4 ---- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig index acb03b45ba050..49c7709e3d895 100644 --- a/arch/x86/kvm/Kconfig +++ b/arch/x86/kvm/Kconfig @@ -80,6 +80,10 @@ config KVM_WERROR If in doubt, say "N". +config KVM_VM_MEMORY_ATTRIBUTES + select KVM_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 b3473aec4d24d..72b19813e5412 100644 --- a/virt/kvm/Kconfig +++ b/virt/kvm/Kconfig @@ -112,10 +112,6 @@ config KVM_MEMORY_ATTRIBUTES depends on KVM_GENERIC_MMU_NOTIFIER bool -config KVM_VM_MEMORY_ATTRIBUTES - select KVM_MEMORY_ATTRIBUTES - bool - config KVM_GUEST_MEMFD select KVM_MEMORY_ATTRIBUTES select XARRAY_MULTI -- 2.51.0.858.gf9c4a03a3a-goog
