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KVM: SVM: fix compilation with modular PSP and non-modular KVM

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Use svm_sev_enabled() in order to cull all calls to PSP code.  Otherwise,
compilation fails with undefined symbols if the PSP device driver is compiled
as a module and KVM is not.

Reported-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2020-04-13 03:20:06 -04:00
parent dbef2808af
commit 9ef1530c0c
1 changed files with 4 additions and 1 deletions
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5
arch/x86/kvm/svm/sev.c
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@ -1117,7 +1117,7 @@ int __init sev_hardware_setup(void)
/* Maximum number of encrypted guests supported simultaneously */
max_sev_asid = cpuid_ecx(0x8000001F);
if (!max_sev_asid)
if (!svm_sev_enabled())
return 1;
/* Minimum ASID value that should be used for SEV guest */
@ -1156,6 +1156,9 @@ int __init sev_hardware_setup(void)
void sev_hardware_teardown(void)
{
if (!svm_sev_enabled())
return;
bitmap_free(sev_asid_bitmap);
bitmap_free(sev_reclaim_asid_bitmap);