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accel/kvm: check for KVM_CAP_MEMORY_ATTRIBUTES on vm

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The exact set of available memory attributes can vary by VM.  In the
future it might vary depending on enabled capabilities, too.  Query the
extension on the VM level instead of on the KVM level, and only after
architecture-specific initialization.

Inspired by an analogous patch by Tom Dohrmann.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2024-10-11 10:39:58 +02:00
parent 60de433d4c
commit 586d708c1e
1 changed files with 6 additions and 6 deletions
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12
accel/kvm/kvm-all.c
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@ -2604,12 +2604,6 @@ static int kvm_init(MachineState *ms)
goto err;
}
kvm_supported_memory_attributes = kvm_check_extension(s, KVM_CAP_MEMORY_ATTRIBUTES);
kvm_guest_memfd_supported =
kvm_check_extension(s, KVM_CAP_GUEST_MEMFD) &&
kvm_check_extension(s, KVM_CAP_USER_MEMORY2) &&
(kvm_supported_memory_attributes & KVM_MEMORY_ATTRIBUTE_PRIVATE);
kvm_immediate_exit = kvm_check_extension(s, KVM_CAP_IMMEDIATE_EXIT);
s->nr_slots_max = kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS);
@ -2723,6 +2717,12 @@ static int kvm_init(MachineState *ms)
goto err;
}
kvm_supported_memory_attributes = kvm_vm_check_extension(s, KVM_CAP_MEMORY_ATTRIBUTES);
kvm_guest_memfd_supported =
kvm_check_extension(s, KVM_CAP_GUEST_MEMFD) &&
kvm_check_extension(s, KVM_CAP_USER_MEMORY2) &&
(kvm_supported_memory_attributes & KVM_MEMORY_ATTRIBUTE_PRIVATE);
if (s->kernel_irqchip_split == ON_OFF_AUTO_AUTO) {
s->kernel_irqchip_split = mc->default_kernel_irqchip_split ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF;
}