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hv: hypercall: change condition for hcall_get_cpu_pm_state
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After rebooting guest, CPPC initialization failed because _CST and _CPC
missed in DSDT table. When writing _CST and _CPC in DSDT table, it gets
cx_cnt or px_cnt as condition. Getting cx_cnt or px_cnt triggers
the hypercall hcall_get_cpu_pm_state. The hypercall hcall_get_cpu_pm_state
uses VM_CREATED as VM state's condition. While, after rebooting guest,
the VM state is VM_PAUSED when writing _CST and _CPC in DSDT table.
Therefore, changing VM state's condition from VM_CREATED to VM_CREATED or
VM_PAUSED for hcall_get_cpu_pm_state can solve the CPPC initialization
failed issue after rebooting guest.

Tracked-On: projectacrn#8695
Signed-off-by: Yuan Lu <[email protected]>
Reviewed-by: Fei Li <[email protected]>
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yison committed Aug 14, 2024
1 parent 4e552b0 commit 44dd7b4
Showing 1 changed file with 1 addition and 1 deletion.
2 changes: 1 addition & 1 deletion hypervisor/common/hypercall.c
Original file line number Diff line number Diff line change
Expand Up @@ -1102,7 +1102,7 @@ int32_t hcall_get_cpu_pm_state(struct acrn_vcpu *vcpu, struct acrn_vm *target_vm
int32_t ret = -1;
uint64_t cmd = param1;

if (is_created_vm(target_vm)) {
if (is_created_vm(target_vm) || is_paused_vm(target_vm)) {
switch (cmd & PMCMD_TYPE_MASK) {
case ACRN_PMCMD_GET_PX_CNT: {
uint8_t px_cnt;
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