linux-kernel - [PATCH 03/13] KVM: nSVM: rename nested_sync_control_from_vmcb02 to nested_sync_int_ctl_from

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Date:   Thu, 17 Nov 2022 16:32:32 +0200
From:   Maxim Levitsky <mlevitsk@...hat.com>
To:     kvm@...r.kernel.org
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Sandipan Das <sandipan.das@....com>,
        Daniel Sneddon <daniel.sneddon@...ux.intel.com>,
        Jing Liu <jing2.liu@...el.com>,
        Josh Poimboeuf <jpoimboe@...nel.org>,
        Wyes Karny <wyes.karny@....com>,
        Borislav Petkov <bp@...en8.de>,
        Babu Moger <babu.moger@....com>,
        Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Jim Mattson <jmattson@...gle.com>, x86@...nel.org,
        Maxim Levitsky <mlevitsk@...hat.com>
Subject: [PATCH 03/13] KVM: nSVM: rename nested_sync_control_from_vmcb02 to nested_sync_int_ctl_from_vmcb02

The nested_sync_control_from_vmcb02 name is misleading as there
are many fields which are modified by the CPU and need to be written back
to vmcb12.

This function only copies some int_ctl bits and thecevent_inj*
fields.

Make it copy only these int_ctl bits and rename the function.

Signed-off-by: Maxim Levitsky <mlevitsk@...hat.com>
---
 arch/x86/kvm/svm/nested.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index 91a51e75717dca..54eb152e2b60b6 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -404,15 +404,13 @@ void nested_copy_vmcb_save_to_cache(struct vcpu_svm *svm,
 }
 
 /*
- * Synchronize fields that are written by the processor, so that
+ * Synchronize int_ctl fields that are written by the processor, so that
  * they can be copied back into the vmcb12.
  */
-static void nested_sync_control_from_vmcb02(struct vcpu_svm *svm,
+static void nested_sync_int_ctl_from_vmcb02(struct vcpu_svm *svm,
 					    struct vmcb *vmcb12)
 {
 	u32 mask;
-	vmcb12->control.event_inj      = svm->vmcb->control.event_inj;
-	vmcb12->control.event_inj_err  = svm->vmcb->control.event_inj_err;
 
 	/* Only a few fields of int_ctl are written by the processor.  */
 	mask = V_IRQ_MASK | V_TPR_MASK;
@@ -986,7 +984,10 @@ int nested_svm_vmexit(struct vcpu_svm *svm)
 	if (vmcb12->control.exit_code != SVM_EXIT_ERR)
 		nested_save_pending_event_to_vmcb12(svm, vmcb12);
 
-	nested_sync_control_from_vmcb02(svm, vmcb12);
+	nested_sync_int_ctl_from_vmcb02(svm, vmcb12);
+
+	vmcb12->control.event_inj      = svm->vmcb->control.event_inj;
+	vmcb12->control.event_inj_err  = svm->vmcb->control.event_inj_err;
 
 	if (svm->nrips_enabled)
 		vmcb12->control.next_rip  = vmcb02->control.next_rip;
-- 
2.34.3