diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2019-12-22 13:18:15 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-12-22 13:18:15 +0100 |
| commit | d68321dec1b2234fb32f423e32c3af5915eae36c (patch) | |
| tree | 7c62b2c76d62ab607238bc2cccc24eed0b32687a /arch/x86/kvm/cpuid.c | |
| parent | 19a049f1a44d18e38a311e723c19c33c81020a30 (diff) | |
| parent | d89c69f42bf0fe42d1f52ea9b3dca15b1ade7601 (diff) | |
Merge tag 'kvm-ppc-fixes-5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into kvm-master
PPC KVM fix for 5.5
- Fix a bug where we try to do an ultracall on a system without an
ultravisor.
Diffstat (limited to 'arch/x86/kvm/cpuid.c')
| -rw-r--r-- | arch/x86/kvm/cpuid.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index bf715e5fd35c..cf55629ff0ff 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -505,7 +505,7 @@ static inline int __do_cpuid_func(struct kvm_cpuid_entry2 *entry, u32 function, r = -E2BIG; - if (*nent >= maxnent) + if (WARN_ON(*nent >= maxnent)) goto out; do_host_cpuid(entry, function, 0); @@ -780,6 +780,11 @@ static inline int __do_cpuid_func(struct kvm_cpuid_entry2 *entry, u32 function, case 0x8000001a: case 0x8000001e: break; + /* Support memory encryption cpuid if host supports it */ + case 0x8000001F: + if (!boot_cpu_has(X86_FEATURE_SEV)) + entry->eax = entry->ebx = entry->ecx = entry->edx = 0; + break; /*Add support for Centaur's CPUID instruction*/ case 0xC0000000: /*Just support up to 0xC0000004 now*/ @@ -812,6 +817,9 @@ out: static int do_cpuid_func(struct kvm_cpuid_entry2 *entry, u32 func, int *nent, int maxnent, unsigned int type) { + if (*nent >= maxnent) + return -E2BIG; + if (type == KVM_GET_EMULATED_CPUID) return __do_cpuid_func_emulated(entry, func, nent, maxnent); |