GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-23 23:32:14 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

KVM: arm64: Delay the polling of the GICR_VPENDBASER.Dirty bit

Browse source 
In order to reduce the impact of the VPT parsing happening on the GIC,
we can split the vcpu reseidency in two phases:

- programming GICR_VPENDBASER: this still happens in vcpu_load()
- checking for the VPT parsing to be complete: this can happen
  on vcpu entry (in kvm_vgic_flush_hwstate())

This allows the GIC and the CPU to work in parallel, rewmoving some
of the entry overhead.

Suggested-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Shenming Lu <lushenming@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20201128141857.983-3-lushenming@huawei.com
This commit is contained in:
Shenming Lu 2020-11-28 22:18:57 +08:00 • committed by Marc Zyngier
parent bf118a5cb7
commit 57e3cebd02
6 changed files with 47 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

4
include/linux/irqchip/arm-gic-v4.h
View file

@ -39,6 +39,8 @@ struct its_vpe {
irq_hw_number_t vpe_db_lpi;
/* VPE resident */
bool resident;
/* VPT parse complete */
bool ready;
union {
/* GICv4.0 implementations */
struct {
@ -104,6 +106,7 @@ enum its_vcpu_info_cmd_type {
PROP_UPDATE_AND_INV_VLPI,
SCHEDULE_VPE,
DESCHEDULE_VPE,
COMMIT_VPE,
INVALL_VPE,
PROP_UPDATE_VSGI,
};
@ -129,6 +132,7 @@ int its_alloc_vcpu_irqs(struct its_vm *vm);
void its_free_vcpu_irqs(struct its_vm *vm);
int its_make_vpe_resident(struct its_vpe *vpe, bool g0en, bool g1en);
int its_make_vpe_non_resident(struct its_vpe *vpe, bool db);
int its_commit_vpe(struct its_vpe *vpe);
int its_invall_vpe(struct its_vpe *vpe);
int its_map_vlpi(int irq, struct its_vlpi_map *map);
int its_get_vlpi(int irq, struct its_vlpi_map *map);