Commit bf96cce4 authored by yezengruan's avatar yezengruan
Browse files

kvm: arm64: fix some pvsched bugs 

virt inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I6E2VI



--------------------------------------------

1. Clear kvm_vcpu_arch::pvsched::base on vcpu reset
The guest memory will otherwise be corrupted by KVM if we reboot into
an old guest kernel which is **not** aware of the pvsched feature.

2. Fix boot cpu pvsched init abnormal
The pv_sched_init was called too early in the boot in setup_arch, hence
pvsched_vcpu_state was not initializedfo vcpu 0.

Signed-off-by: default avatarZenghui Yu <yuzenghui@huawei.com>
Signed-off-by: default avataryezengruan <yezengruan@huawei.com>
parent ee95e701

arch/arm64/kernel/paravirt.c

+1 −0
Original line number Diff line number Diff line
@@ -351,3 +351,4 @@ int __init pv_sched_init(void) 


	return 0;

}

early_initcall(pv_sched_init);

arch/arm64/kernel/setup.c

+0 −2
Original line number Diff line number Diff line
@@ -424,8 +424,6 @@ void __init __no_sanitize_address setup_arch(char **cmdline_p) 
	smp_init_cpus();

	smp_build_mpidr_hash();



	pv_sched_init();



	/* Init percpu seeds for random tags after cpus are set up. */

	kasan_init_tags();

arch/arm64/kvm/arm.c

+2 −0
Original line number Diff line number Diff line
@@ -1176,6 +1176,8 @@ static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu, 
	else

		vcpu->arch.power_off = false;



	kvm_arm_pvsched_vcpu_init(&vcpu->arch);



	return 0;

}