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kvm: introduce memory encryption APIs

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Inorder to integerate the Secure Encryption Virtualization (SEV) support
add few high-level memory encryption APIs which can be used for encrypting
the guest memory region.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Brijesh Singh 2018-03-08 06:48:46 -06:00 • committed by Paolo Bonzini
parent b20e37801f
commit 54e8953967
5 changed files with 33 additions and 0 deletions
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14
accel/kvm/kvm-all.c
View file

@ -107,6 +107,7 @@ struct KVMState
/* memory encryption */
void *memcrypt_handle;
int (*memcrypt_encrypt_data)(void *handle, uint8_t *ptr, uint64_t len);
};
KVMState *kvm_state;
@ -151,6 +152,17 @@ bool kvm_memcrypt_enabled(void)
return false;
}
int kvm_memcrypt_encrypt_data(uint8_t *ptr, uint64_t len)
{
if (kvm_state->memcrypt_handle &&
kvm_state->memcrypt_encrypt_data) {
return kvm_state->memcrypt_encrypt_data(kvm_state->memcrypt_handle,
ptr, len);
}
return 1;
}
static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml)
{
KVMState *s = kvm_state;
@ -1659,6 +1671,8 @@ static int kvm_init(MachineState *ms)
ret = -1;
goto err;
}
kvm_state->memcrypt_encrypt_data = sev_encrypt_data;
}
ret = kvm_arch_init(ms, s);