github/acrn-hypervisor
1
0
Fork 0
mirror of https://github.com/projectacrn/acrn-hypervisor.git synced 2025-09-21 08:50:27 +00:00
Code Issues Projects Releases Wiki Activity

hv: disable guest MONITOR-WAIT support when SW SRAM is configured

Browse Source 
Per-core software SRAM L2 cache may be flushed by 'mwait'
extension instruction, which guest VM may execute to enter
core deep sleep. Such kind of flushing is not expected when
software SRAM is enabled for RTVM.

Hypervisor disables MONITOR-WAIT support on both hypervisor
and VMs sides to protect above software SRAM from being flushed.

This patch disable ACRN guest MONITOR-WAIT support if software
SRAM is configured.

Tracked-On: #5649
Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
Reviewed-by: Fei Li <fei1.li@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Yonghua Huang
2021-03-03 15:51:10 +08:00
committed by wenlingz
parent ae43b2a847
commit 1a011bd91b
4 changed files with 18 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
hypervisor/arch/x86/guest/vm.c
View File

@@ -535,6 +535,7 @@ int32_t create_vm(uint16_t vm_id, uint64_t pcpu_bitmap, struct acrn_vm_config *v
spinlock_init(&vm->arch_vm.iwkey_backup_lock);
vm->arch_vm.vlapic_mode = VM_VLAPIC_XAPIC;
vm->arch_vm.vm_mwait_cap = has_monitor_cap();
vm->intr_inject_delay_delta = 0UL;
vm->nr_emul_mmio_regions = 0U;
vm->vcpuid_entry_nr = 0U;