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authorPaolo Bonzini <pbonzini@redhat.com>2018-10-09 18:35:29 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2018-10-09 18:38:42 +0200
commit853c110982eaff0d99dace3f66f1ba58b5bfd9d5 (patch)
treecb694c46802482ccc83ba2e37c7ba5e99969594c /arch
parentcc906f07d7d569a30bb6f0baf8f80b2968353dc9 (diff)
downloadlinux-853c110982eaff0d99dace3f66f1ba58b5bfd9d5.tar.bz2
KVM: x86: support CONFIG_KVM_AMD=y with CONFIG_CRYPTO_DEV_CCP_DD=m
SEV requires access to the AMD cryptographic device APIs, and this does not work when KVM is builtin and the crypto driver is a module. Actually the Kconfig conditions for CONFIG_KVM_AMD_SEV try to disable SEV in that case, but it does not work because the actual crypto calls are not culled, only sev_hardware_setup() is. This patch adds two CONFIG_KVM_AMD_SEV checks that gate all the remaining SEV code; it fixes this particular configuration, and drops 5 KiB of code when CONFIG_KVM_AMD_SEV=n. Reported-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kvm/svm.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index d96092b35936..61ccfb13899e 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -436,14 +436,18 @@ static inline struct kvm_svm *to_kvm_svm(struct kvm *kvm)
static inline bool svm_sev_enabled(void)
{
- return max_sev_asid;
+ return IS_ENABLED(CONFIG_KVM_AMD_SEV) ? max_sev_asid : 0;
}
static inline bool sev_guest(struct kvm *kvm)
{
+#ifdef CONFIG_KVM_AMD_SEV
struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
return sev->active;
+#else
+ return false;
+#endif
}
static inline int sev_get_asid(struct kvm *kvm)