jchzhou/kernel-sophgo-sg2044-revyos-6.17-src
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Merge tag 'kvm-x86-svm-6.16' of https://github.com/kvm-x86/linux into HEAD

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KVM SVM changes for 6.16:

 - Wait for target vCPU to acknowledge KVM_REQ_UPDATE_PROTECTED_GUEST_STATE to
   fix a race between AP destroy and VMRUN.

 - Decrypt and dump the VMSA in dump_vmcb() if debugging enabled for the VM.

 - Add support for ALLOWED_SEV_FEATURES.

 - Add #VMGEXIT to the set of handlers special cased for CONFIG_RETPOLINE=y.

 - Treat DEBUGCTL[5:2] as reserved to pave the way for virtualizing features
   that utilize those bits.

 - Don't account temporary allocations in sev_send_update_data().

 - Add support for KVM_CAP_X86_BUS_LOCK_EXIT on SVM, via Bus Lock Threshold.
This commit is contained in:
Paolo Bonzini
2025-05-27 12:15:49 -04:00
parent 3e89d5fdc7 72df72e1c6
commit 4e02d4f973
14 changed files with 469 additions and 31 deletions
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19
virt/kvm/kvm_main.c
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@@ -3739,7 +3739,7 @@ EXPORT_SYMBOL_GPL(kvm_vcpu_wake_up);
/*
* Kick a sleeping VCPU, or a guest VCPU in guest mode, into host kernel mode.
*/
void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
void __kvm_vcpu_kick(struct kvm_vcpu *vcpu, bool wait)
{
int me, cpu;
@@ -3768,13 +3768,24 @@ void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
*/
if (kvm_arch_vcpu_should_kick(vcpu)) {
cpu = READ_ONCE(vcpu->cpu);
if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu))
smp_send_reschedule(cpu);
if (cpu != me && (unsigned int)cpu < nr_cpu_ids && cpu_online(cpu)) {
/*
* Use a reschedule IPI to kick the vCPU if the caller
* doesn't need to wait for a response, as KVM allows
* kicking vCPUs while IRQs are disabled, but using the
* SMP function call framework with IRQs disabled can
* deadlock due to taking cross-CPU locks.
*/
if (wait)
smp_call_function_single(cpu, ack_kick, NULL, wait);
else
smp_send_reschedule(cpu);
}
}
out:
put_cpu();
}
EXPORT_SYMBOL_GPL(kvm_vcpu_kick);
EXPORT_SYMBOL_GPL(__kvm_vcpu_kick);
#endif /* !CONFIG_S390 */
int kvm_vcpu_yield_to(struct kvm_vcpu *target)