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| author | Roman Bolshakov <r.bolshakov@yadro.com> | 2020-06-30 13:28:21 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-07-10 18:02:19 -0400 |
| commit | 82695a1b9c696aaea491e932548f9787adb7d78b (patch) | |
| tree | b26fc571be21f99a6340ad2a1445215a9f1dfad9 /target/i386/hvf/vmx.h | |
| parent | a4e26fa8583a215aa61107a623bfa25afd09a860 (diff) | |
| download | qemu-82695a1b9c696aaea491e932548f9787adb7d78b.zip qemu-82695a1b9c696aaea491e932548f9787adb7d78b.tar.gz qemu-82695a1b9c696aaea491e932548f9787adb7d78b.tar.bz2 | |
i386: hvf: Move Guest LMA reset to macvm_set_cr0()
The only useful purpose of hvf_reset_vcpu() is to clear "IA-32e mode
guest" (LMA) VM-Entry control. But it can be moved to macvm_set_cr0()
which is indirectly used by post-init and post-reset to flush emulator
state. That enables clean removal of hvf_reset_vcpu().
LMA is set only if IA32_EFER.LME = 1, according to Intel SDM "9.8.5
Initializing IA-32e Mode" and "9.8.5.4 Switching Out of IA-32e Mode
Operation", otherwise the entry control can be safely cleared.
Cc: Cameron Esfahani <dirty@apple.com>
Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com>
Message-Id: <20200630102824.77604-7-r.bolshakov@yadro.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target/i386/hvf/vmx.h')
| -rw-r--r-- | target/i386/hvf/vmx.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/target/i386/hvf/vmx.h b/target/i386/hvf/vmx.h index 437238f..75ba1e2 100644 --- a/target/i386/hvf/vmx.h +++ b/target/i386/hvf/vmx.h @@ -123,6 +123,7 @@ static inline void macvm_set_cr0(hv_vcpuid_t vcpu, uint64_t cr0) uint64_t old_cr0 = rvmcs(vcpu, VMCS_GUEST_CR0); uint64_t changed_cr0 = old_cr0 ^ cr0; uint64_t mask = CR0_PG | CR0_CD | CR0_NW | CR0_NE | CR0_ET; + uint64_t entry_ctls; if ((cr0 & CR0_PG) && (rvmcs(vcpu, VMCS_GUEST_CR4) & CR4_PAE) && !(efer & MSR_EFER_LME)) { @@ -146,6 +147,9 @@ static inline void macvm_set_cr0(hv_vcpuid_t vcpu, uint64_t cr0) exit_long_mode(vcpu, cr0, efer); } } + } else { + entry_ctls = rvmcs(vcpu, VMCS_ENTRY_CTLS); + wvmcs(vcpu, VMCS_ENTRY_CTLS, entry_ctls & ~VM_ENTRY_GUEST_LMA); } /* Filter new CR0 after we are finished examining it above. */ |