tmakin/ack-tegra
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

FROMLIST: virt: geniezone: Add support for virtual timer migration

Browse Source 
Introduce a mechanism to migrate the ARM64 virtual timer from the
guest VM to the host Linux system when the execution context switches
from the guest VM to the host. Ensure that the guest VM's virtual
timer continues to operate seamlessly after the context switch, given
that ARM64 has only one virtual timer.

Translate the remaining time before the VM timer expires into the host
Linux system by setting the remaining time on an hrtimer. This allows
the guest VM to maintain its timer operations without interruption.

Enable seamless timer operation during idle states. When a VM enters
an idle state and the execution context returns to the host Linux,
ensure that the timer continues to operate seamlessly, preventing
disruption to the guest VM's timing operations.

Signed-off-by: Willix Yeh <chi-shen.yeh@mediatek.com>
Co-developed-by: Kevenny Hsieh <kevenny.hsieh@mediatek.com>
Signed-off-by: Kevenny Hsieh <kevenny.hsieh@mediatek.com>
Signed-off-by: Liju Chen <liju-clr.chen@mediatek.com>
Change-Id: I70e5e00cc8d4848aea218b41ab15fec688ac6df7
Bug: 379230831
Link: https://lore.kernel.org/lkml/20241114100802.4116-23-liju-clr.chen@mediatek.com/
This commit is contained in:
Willix Yeh
2024-07-09 15:09:29 +08:00
committed by Liju-clr Chen
parent 76dceb11f2
commit 7385d97eaf
6 changed files with 90 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/linux/soc/mediatek/gzvm_drv.h
+7
View File
@@ -129,6 +129,7 @@ struct gzvm_vcpu {
struct mutex lock;
struct gzvm_vcpu_run *run;
struct gzvm_vcpu_hwstate *hwstate;
struct hrtimer gzvm_vtimer;
};
struct gzvm_pinned_page {
@@ -242,11 +243,17 @@ int gzvm_vm_allocate_guest_page(struct gzvm *gzvm, struct gzvm_memslot *slot,
int gzvm_vm_ioctl_create_vcpu(struct gzvm *gzvm, u32 cpuid);
int gzvm_arch_vcpu_update_one_reg(struct gzvm_vcpu *vcpu, __u64 reg_id,
bool is_write, __u64 *data);
int gzvm_arch_drv_init(void);
int gzvm_arch_create_vcpu(u16 vm_id, int vcpuid, void *run);
int gzvm_arch_vcpu_run(struct gzvm_vcpu *vcpu, __u64 *exit_reason);
int gzvm_arch_destroy_vcpu(u16 vm_id, int vcpuid);
int gzvm_arch_inform_exit(u16 vm_id);
u64 gzvm_vcpu_arch_get_timer_delay_ns(struct gzvm_vcpu *vcpu);
void gzvm_vtimer_set(struct gzvm_vcpu *vcpu, u64 ns);
void gzvm_vtimer_release(struct gzvm_vcpu *vcpu);
int gzvm_find_memslot(struct gzvm *vm, u64 gpa);
int gzvm_handle_page_fault(struct gzvm_vcpu *vcpu);
bool gzvm_handle_guest_exception(struct gzvm_vcpu *vcpu);