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hv: pause all other vCPUs in same VM when do wbinvd emulation

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Invalidate cache by scanning and flushing the whole guest memory is
inefficient which might cause long execution time for WBINVD emulation.
A long execution in hypervisor might cause a vCPU stuck phenomenon what
impact Windows Guest booting.

This patch introduce a workaround method that pausing all other vCPUs in
the same VM when do wbinvd emulation.

Tracked-On: #4703
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Shuo A Liu
2020-04-16 13:45:43 +08:00
committed by wenlingz
parent a335679ce9
commit 9a15ea82ee
4 changed files with 42 additions and 2 deletions
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8
hypervisor/include/arch/x86/guest/vcpu.h
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@@ -93,6 +93,11 @@
*/
#define ACRN_REQUEST_INIT_VMCS 8U
/**
* @brief Request for sync waiting WBINVD
*/
#define ACRN_REQUEST_WAIT_WBINVD 9U
/**
* @}
*/
@@ -148,7 +153,8 @@ enum vm_cpu_mode {
#define VCPU_EVENT_IOREQ 0
#define VCPU_EVENT_VIRTUAL_INTERRUPT 1
#define VCPU_EVENT_NUM 2
#define VCPU_EVENT_SYNC_WBINVD 2
#define VCPU_EVENT_NUM 3
enum reset_mode;