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hypervisor: use "wbinvd" carefully in RT environment

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Due to the side-effect to cache of "wbinvd" instruction, just apply it
in case of noncoherent DMA.

Tracked-On: #1824
Signed-off-by: Zheng, Gen <gen.zheng@intel.com>
Reviewed-by: Binbin Wu <binbin.wu@intel.com>
This commit is contained in:
Zheng, Gen
2018-11-14 22:03:04 +08:00
committed by lijinxia
parent 61e6c1f054
commit b32e689a64
4 changed files with 47 additions and 5 deletions
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6
hypervisor/arch/x86/vmx.c
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@@ -423,7 +423,9 @@ void vmx_write_cr0(struct acrn_vcpu *vcpu, uint64_t cr0)
* disabled behavior
*/
exec_vmwrite64(VMX_GUEST_IA32_PAT_FULL, PAT_ALL_UC_VALUE);
cache_flush_invalidate_all();
if(!iommu_snoop_supported(vcpu->vm)) {
cache_flush_invalidate_all();
}
} else {
/* Restore IA32_PAT to enable cache again */
exec_vmwrite64(VMX_GUEST_IA32_PAT_FULL,
@@ -854,6 +856,8 @@ static void init_exec_ctrl(struct acrn_vcpu *vcpu)
value32 |= VMX_PROCBASED_CTLS2_XSVE_XRSTR;
}
value32 |= VMX_PROCBASED_CTLS2_WBINVD;
exec_vmwrite32(VMX_PROC_VM_EXEC_CONTROLS2, value32);
pr_dbg("VMX_PROC_VM_EXEC_CONTROLS2: 0x%x ", value32);