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

FROMLIST: virt: geniezone: Reduce blocked duration in hypervisor when destroying a VM

Browse Source 
Reduce the blocked duration in the hypervisor when destroying a VM
by splitting a single hypercall into multiple calls. Previously, the
hypervisor could be blocked for an extended period when destroying a VM, as
the entire process was handled in a single hypercall. This could lead to
performance degradation because the scheduler does not have chances to
schedule other tasks when the hypercall is processing by the hypervisor.

By splitting the destruction process into multiple smaller hypercalls,
significantly reduce the blocked duration in the hypervisor. Additionally,
making the amount of each call adjustable provides flexibility to optimize
the process based on different workloads and system configurations.

Signed-off-by: Jerry Wang <ze-yu.wang@mediatek.com>
Signed-off-by: Liju Chen <liju-clr.chen@mediatek.com>
Change-Id: I0b22854224de7d248d6a2558ff3ed5c02c735306
Bug: 379230831
Link: https://lore.kernel.org/lkml/20241114100802.4116-26-liju-clr.chen@mediatek.com/
This commit is contained in:
Jerry Wang
2024-11-13 17:05:57 +08:00
committed by Liju-clr Chen
parent f03f0e5256
commit eaacc22f2d
5 changed files with 94 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/linux/soc/mediatek/gzvm_drv.h
+6 -1
View File
@@ -30,6 +30,7 @@ struct gzvm_driver {
struct kobject *sysfs_root_dir;
u32 demand_paging_batch_pages;
u32 destroy_batch_pages;
struct dentry *gzvm_debugfs_dir;
};
@@ -53,6 +54,7 @@ struct gzvm_driver {
#define ERR_INVALID_ARGS (-8)
#define ERR_NOT_SUPPORTED (-24)
#define ERR_NOT_IMPLEMENTED (-27)
#define ERR_BUSY (-33)
#define ERR_FAULT (-40)
#define GZVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
@@ -68,6 +70,7 @@ struct gzvm_driver {
#define GZVM_BLOCK_BASED_DEMAND_PAGE_SIZE (PMD_SIZE) /* 2MB */
#define GZVM_DRV_DEMAND_PAGING_BATCH_PAGES \
(GZVM_BLOCK_BASED_DEMAND_PAGE_SIZE / PAGE_SIZE)
#define GZVM_DRV_DESTROY_PAGING_BATCH_PAGES (128)
#define GZVM_MAX_DEBUGFS_DIR_NAME_SIZE 20
#define GZVM_MAX_DEBUGFS_VALUE_SIZE 20
@@ -225,12 +228,14 @@ int gzvm_arch_probe(struct gzvm_version drv_version,
struct gzvm_version *hyp_version);
int gzvm_arch_query_hyp_batch_pages(struct gzvm_enable_cap *cap,
void __user *argp);
int gzvm_arch_query_destroy_batch_pages(struct gzvm_enable_cap *cap,
void __user *argp);
int gzvm_arch_set_memregion(u16 vm_id, size_t buf_size,
phys_addr_t region);
int gzvm_arch_check_extension(struct gzvm *gzvm, __u64 cap, void __user *argp);
int gzvm_arch_create_vm(unsigned long vm_type);
int gzvm_arch_destroy_vm(u16 vm_id);
int gzvm_arch_destroy_vm(u16 vm_id, u64 destroy_page_gran);
int gzvm_arch_map_guest(u16 vm_id, int memslot_id, u64 pfn, u64 gfn,
u64 nr_pages);
int gzvm_arch_map_guest_block(u16 vm_id, int memslot_id, u64 gfn, u64 nr_pages);