diff options
| author | Xiaoyao Li <xiaoyao.li@intel.com> | 2024-03-20 03:39:03 -0500 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-04-23 17:35:25 +0200 |
| commit | 37662d85b0b7dded0ebdf6747bef6c3bb7ed6a0c (patch) | |
| tree | b5d8be3492b7aa7e3df4d1ec71a44180255077fb /hw | |
| parent | bd3bcf6962b664ca3bf9c60fdcc4534e8e3d0641 (diff) | |
HostMem: Add mechanism to opt in kvm guest memfd via MachineState
Add a new member "guest_memfd" to memory backends. When it's set
to true, it enables RAM_GUEST_MEMFD in ram_flags, thus private kvm
guest_memfd will be allocated during RAMBlock allocation.
Memory backend's @guest_memfd is wired with @require_guest_memfd
field of MachineState. It avoid looking up the machine in phymem.c.
MachineState::require_guest_memfd is supposed to be set by any VMs
that requires KVM guest memfd as private memory, e.g., TDX VM.
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-ID: <20240320083945.991426-8-michael.roth@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/core/machine.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/hw/core/machine.c b/hw/core/machine.c index a92bec2314..582c2df37a 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -1201,6 +1201,11 @@ bool machine_mem_merge(MachineState *machine) return machine->mem_merge; } +bool machine_require_guest_memfd(MachineState *machine) +{ + return machine->require_guest_memfd; +} + static char *cpu_slot_to_string(const CPUArchId *cpu) { GString *s = g_string_new(NULL); |