Commit 54163a34 authored by Suravee Suthikulpanit's avatar Suravee Suthikulpanit Committed by Paolo Bonzini
Browse files

KVM: Introduce kvm_make_all_cpus_request_except() 



This allows making request to all other vcpus except the one
specified in the parameter.

Signed-off-by: default avatarSuravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Message-Id: <1588771076-73790-2-git-send-email-suravee.suthikulpanit@amd.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 45981ded

arch/x86/kvm/hyperv.c

+1 −1
Original line number Diff line number Diff line
@@ -1427,7 +1427,7 @@ static u64 kvm_hv_flush_tlb(struct kvm_vcpu *current_vcpu, u64 ingpa, 
	 */

	kvm_make_vcpus_request_mask(kvm,

				    KVM_REQ_TLB_FLUSH | KVM_REQUEST_NO_WAKEUP,

				    vcpu_mask, &hv_vcpu->tlb_flush);

				    NULL, vcpu_mask, &hv_vcpu->tlb_flush);



ret_success:

	/* We always do full TLB flush, set rep_done = rep_cnt. */

arch/x86/kvm/x86.c

+1 −1
Original line number Diff line number Diff line
@@ -8030,7 +8030,7 @@ void kvm_make_scan_ioapic_request_mask(struct kvm *kvm, 
	zalloc_cpumask_var(&cpus, GFP_ATOMIC);



	kvm_make_vcpus_request_mask(kvm, KVM_REQ_SCAN_IOAPIC,

				    vcpu_bitmap, cpus);

				    NULL, vcpu_bitmap, cpus);



	free_cpumask_var(cpus);

}

include/linux/kvm_host.h

+3 −0
Original line number Diff line number Diff line
@@ -813,8 +813,11 @@ void kvm_flush_remote_tlbs(struct kvm *kvm); 
void kvm_reload_remote_mmus(struct kvm *kvm);



bool kvm_make_vcpus_request_mask(struct kvm *kvm, unsigned int req,

				 struct kvm_vcpu *except,

				 unsigned long *vcpu_bitmap, cpumask_var_t tmp);

bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);

bool kvm_make_all_cpus_request_except(struct kvm *kvm, unsigned int req,

				      struct kvm_vcpu *except);

bool kvm_make_cpus_request_mask(struct kvm *kvm, unsigned int req,

				unsigned long *vcpu_bitmap);

virt/kvm/kvm_main.c

+11 −3
Original line number Diff line number Diff line
@@ -259,6 +259,7 @@ static inline bool kvm_kick_many_cpus(const struct cpumask *cpus, bool wait) 
}



bool kvm_make_vcpus_request_mask(struct kvm *kvm, unsigned int req,

				 struct kvm_vcpu *except,

				 unsigned long *vcpu_bitmap, cpumask_var_t tmp)

{

	int i, cpu, me;
@@ -268,7 +269,8 @@ bool kvm_make_vcpus_request_mask(struct kvm *kvm, unsigned int req, 
	me = get_cpu();



	kvm_for_each_vcpu(i, vcpu, kvm) {

		if (vcpu_bitmap && !test_bit(i, vcpu_bitmap))

		if ((vcpu_bitmap && !test_bit(i, vcpu_bitmap)) ||

		    vcpu == except)

			continue;



		kvm_make_request(req, vcpu);
@@ -288,19 +290,25 @@ bool kvm_make_vcpus_request_mask(struct kvm *kvm, unsigned int req, 
	return called;

}



bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req)

bool kvm_make_all_cpus_request_except(struct kvm *kvm, unsigned int req,

				      struct kvm_vcpu *except)

{

	cpumask_var_t cpus;

	bool called;



	zalloc_cpumask_var(&cpus, GFP_ATOMIC);



	called = kvm_make_vcpus_request_mask(kvm, req, NULL, cpus);

	called = kvm_make_vcpus_request_mask(kvm, req, except, NULL, cpus);



	free_cpumask_var(cpus);

	return called;

}



bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req)

{

	return kvm_make_all_cpus_request_except(kvm, req, NULL);

}



#ifndef CONFIG_HAVE_KVM_ARCH_TLB_FLUSH_ALL

void kvm_flush_remote_tlbs(struct kvm *kvm)

{