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author | Paolo Bonzini <pbonzini@redhat.com> | 2018-07-28 21:56:09 +0200 |
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committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-08-06 17:58:36 +0200 |
commit | cb5476379f0718046f3c6b3195d18838c5b25ea2 (patch) | |
tree | 837af98a529d0611e9d55ab73272736acd333aaf /tools/testing/selftests/kvm/include | |
parent | kvm: nVMX: Introduce KVM_CAP_NESTED_STATE (diff) | |
download | linux-dev-cb5476379f0718046f3c6b3195d18838c5b25ea2.tar.xz linux-dev-cb5476379f0718046f3c6b3195d18838c5b25ea2.zip |
kvm: selftests: add test for nested state save/restore
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/testing/selftests/kvm/include')
-rw-r--r-- | tools/testing/selftests/kvm/include/vmx.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/include/vmx.h b/tools/testing/selftests/kvm/include/vmx.h index 9caaf56696a4..54e6020d0638 100644 --- a/tools/testing/selftests/kvm/include/vmx.h +++ b/tools/testing/selftests/kvm/include/vmx.h @@ -380,6 +380,30 @@ static inline int vmptrld(uint64_t vmcs_pa) return ret; } +static inline int vmptrst(uint64_t *value) +{ + uint64_t tmp; + uint8_t ret; + + __asm__ __volatile__("vmptrst %[value]; setna %[ret]" + : [value]"=m"(tmp), [ret]"=rm"(ret) + : : "cc", "memory"); + + *value = tmp; + return ret; +} + +/* + * A wrapper around vmptrst that ignores errors and returns zero if the + * vmptrst instruction fails. + */ +static inline uint64_t vmptrstz(void) +{ + uint64_t value = 0; + vmptrst(&value); + return value; +} + /* * No guest state (e.g. GPRs) is established by this vmlaunch. */ @@ -444,6 +468,15 @@ static inline int vmresume(void) return ret; } +static inline void vmcall(void) +{ + /* Currently, L1 destroys our GPRs during vmexits. */ + __asm__ __volatile__("push %%rbp; vmcall; pop %%rbp" : : : + "rax", "rbx", "rcx", "rdx", + "rsi", "rdi", "r8", "r9", "r10", "r11", "r12", + "r13", "r14", "r15"); +} + static inline int vmread(uint64_t encoding, uint64_t *value) { uint64_t tmp; |