[PATCH 2/4] KVM: introduce kvm_clear_all_cpus_request

Emanuele Giuseppe Esposito
2022-10-22T15:48:41Z

Clear the given request in all vcpus of the VM with struct kvm.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
---
Documentation/virt/kvm/vcpu-requests.rst | 3 +++
virt/kvm/kvm_main.c | 10 ++++++++++
2 files changed, 13 insertions(+)

diff --git a/Documentation/virt/kvm/vcpu-requests.rst b/Documentation/virt/kvm/vcpu-requests.rst
index 31f62b64e07b..468410dfe84d 100644
--- a/Documentation/virt/kvm/vcpu-requests.rst
+++ b/Documentation/virt/kvm/vcpu-requests.rst
@@ -36,6 +36,9 @@ its TLB with a VCPU request. The API consists of the following functions::
/* Make request @req of all VCPUs of the VM with struct kvm @kvm. */
bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req);

+ /* Clear request @req of all VCPUs of the VM with struct kvm @kvm. */
+ void kvm_clear_all_cpus_request(struct kvm *kvm, unsigned int req);
+
Typically a requester wants the VCPU to perform the activity as soon
as possible after making the request. This means most requests
(kvm_make_request() calls) are followed by a call to kvm_vcpu_kick(),
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 584a5bab3af3..c080b93edc0d 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -355,6 +355,16 @@ bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req)
}
EXPORT_SYMBOL_GPL(kvm_make_all_cpus_request);

+void kvm_clear_all_cpus_request(struct kvm *kvm, unsigned int req)
+{
+ unsigned long i;
+ struct kvm_vcpu *vcpu;
+
+ kvm_for_each_vcpu(i, vcpu, kvm)
+ kvm_clear_request(req, vcpu);
+}
+EXPORT_SYMBOL_GPL(kvm_clear_all_cpus_request);
+
#ifndef CONFIG_HAVE_KVM_ARCH_TLB_FLUSH_ALL
void kvm_flush_remote_tlbs(struct kvm *kvm)
{
--
2.31.1