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[PATCH] hw/i386: fix short-circuit logic with non-optimizing builds


From: Daniel Hoffman
Subject: [PATCH] hw/i386: fix short-circuit logic with non-optimizing builds
Date: Sat, 18 Nov 2023 10:25:31 -0800

`kvm_enabled()` is compiled down to `0` and short-circuit logic is
used to remmove references to undefined symbols at the compile stage.
Some build configurations with some compilers don't attempt to
simplify this logic down in some cases (the pattern appears to be
that the literal false must be the first term) and this was causing
some builds to emit references to undefined symbols.

Signed-off-by: Daniel Hoffman <dhoff749@gmail.com>
---
 hw/i386/x86.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/hw/i386/x86.c b/hw/i386/x86.c
index b3d054889bb..d339c8f3ef8 100644
--- a/hw/i386/x86.c
+++ b/hw/i386/x86.c
@@ -132,7 +132,7 @@ void x86_cpus_init(X86MachineState *x86ms, int 
default_cpu_version)
      * Can we support APIC ID 255 or higher?  With KVM, that requires
      * both in-kernel lapic and X2APIC userspace API.
      */
-    if (x86ms->apic_id_limit > 255 && kvm_enabled() &&
+    if (kvm_enabled() && x86ms->apic_id_limit > 255 &&
         (!kvm_irqchip_in_kernel() || !kvm_enable_x2apic())) {
         error_report("current -smp configuration requires kernel "
                      "irqchip and X2APIC API support.");
@@ -418,8 +418,8 @@ void x86_cpu_pre_plug(HotplugHandler *hotplug_dev,
     }
     cpu->thread_id = topo_ids.smt_id;
 
-    if (hyperv_feat_enabled(cpu, HYPERV_FEAT_VPINDEX) &&
-        kvm_enabled() && !kvm_hv_vpindex_settable()) {
+    if (kvm_enabled() && hyperv_feat_enabled(cpu, HYPERV_FEAT_VPINDEX) &&
+        !kvm_hv_vpindex_settable()) {
         error_setg(errp, "kernel doesn't allow setting HyperV VP_INDEX");
         return;
     }
-- 
2.40.1




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