On 12/25/18 4:29 AM, Tian, Kevin wrote:
From: Razvan Cojocaru [mailto:rcojoc...@bitdefender.com] Sent: Friday, December 14, 2018 7:50 PMBlock interrupts (in vmx_intr_assist()) for the duration of processing a sync vm_event (similarly to the strategy currently used for single-stepping). Otherwise, attempting to emulate an instruction when requested by a vm_event reply may legitimately need to call e.g. hvm_inject_page_fault(), which then overwrites the active interrupt in the VMCS. The sync vm_event handling path on x86/VMX is (roughly): monitor_traps() -> process vm_event -> vmx_intr_assist() (possibly writing VM_ENTRY_INTR_INFO) -> hvm_vm_event_do_resume() -> hvm_emulate_one_vm_event() (possibly overwriting the VM_ENTRY_INTR_INFO value). This patch may also be helpful for the future removal of may_defer in hvm_set_cr{0,3,4} and hvm_set_msr(). Signed-off-by: Razvan Cojocaru <rcojoc...@bitdefender.com>Reviewed-by: Kevin Tian <kevin.t...@intel.com>
Ping? Thanks, Razvan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
