KVM: SEV: Rename kvm_ghcb_get_sw_exit_code() to kvm_get_cached_sw_exit_code()

Rename kvm_ghcb_get_sw_exit_code() to kvm_get_cached_sw_exit_code() to make
it clear that KVM is getting the cached value, not reading directly from
the guest-controlled GHCB.  More importantly, vacating
kvm_ghcb_get_sw_exit_code() will allow adding a KVM-specific macro-built
kvm_ghcb_get_##field() helper to read values from the GHCB.

No functional change intended.

Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://lore.kernel.org/r/20250919223258.1604852-2-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index a95b862afa23987a5efef8f397a822996bf61d34..5456a71f9504029dad29537a8ca501a890817ff1 100644 (file)
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -3220,7 +3220,7 @@ skip_vmsa_free:
                kvfree(svm->sev_es.ghcb_sa);
 }
 
-static u64 kvm_ghcb_get_sw_exit_code(struct vmcb_control_area *control)
+static u64 kvm_get_cached_sw_exit_code(struct vmcb_control_area *control)
 {
        return (((u64)control->exit_code_hi) << 32) | control->exit_code;
 }
@@ -3246,7 +3246,7 @@ static void dump_ghcb(struct vcpu_svm *svm)
         */
        pr_err("GHCB (GPA=%016llx) snapshot:\n", svm->vmcb->control.ghcb_gpa);
        pr_err("%-20s%016llx is_valid: %u\n", "sw_exit_code",
-              kvm_ghcb_get_sw_exit_code(control), kvm_ghcb_sw_exit_code_is_valid(svm));
+              kvm_get_cached_sw_exit_code(control), kvm_ghcb_sw_exit_code_is_valid(svm));
        pr_err("%-20s%016llx is_valid: %u\n", "sw_exit_info_1",
               control->exit_info_1, kvm_ghcb_sw_exit_info_1_is_valid(svm));
        pr_err("%-20s%016llx is_valid: %u\n", "sw_exit_info_2",
@@ -3335,7 +3335,7 @@ static int sev_es_validate_vmgexit(struct vcpu_svm *svm)
         * Retrieve the exit code now even though it may not be marked valid
         * as it could help with debugging.
         */
-       exit_code = kvm_ghcb_get_sw_exit_code(control);
+       exit_code = kvm_get_cached_sw_exit_code(control);
 
        /* Only GHCB Usage code 0 is supported */
        if (svm->sev_es.ghcb->ghcb_usage) {
@@ -4340,7 +4340,7 @@ int sev_handle_vmgexit(struct kvm_vcpu *vcpu)
 
        svm_vmgexit_success(svm, 0);
 
-       exit_code = kvm_ghcb_get_sw_exit_code(control);
+       exit_code = kvm_get_cached_sw_exit_code(control);
        switch (exit_code) {
        case SVM_VMGEXIT_MMIO_READ:
                ret = setup_vmgexit_scratch(svm, true, control->exit_info_2);