sysemu/kvm: Restrict hvf_get_supported_cpuid() to x86 targets

hvf_get_supported_cpuid() is only defined for x86 targets
(in target/i386/hvf/x86_cpuid.c).
Its declaration is pointless on all other targets.

All the calls to it in target/i386/cpu.c are guarded by
a call on hvf_enabled(), so are elided when HVF is not
built in. Therefore we can remove the unnecessary function
stub.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20231004092510.39498-3-philmd@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

include/sysemu/hvf.h

@@ -20,13 +20,10 @@
 #include "cpu.h"
 
 #ifdef CONFIG_HVF
-uint32_t hvf_get_supported_cpuid(uint32_t func, uint32_t idx,
-                                 int reg);
 extern bool hvf_allowed;
 #define hvf_enabled() (hvf_allowed)
 #else /* !CONFIG_HVF */
 #define hvf_enabled() 0
-#define hvf_get_supported_cpuid(func, idx, reg) 0
 #endif /* !CONFIG_HVF */
 
 #endif /* NEED_CPU_H */

target/i386/cpu.c

@@ -26,6 +26,7 @@
 #include "tcg/helper-tcg.h"
 #include "sysemu/reset.h"
 #include "sysemu/hvf.h"
+#include "hvf/hvf-i386.h"
 #include "kvm/kvm_i386.h"
 #include "sev.h"
 #include "qapi/error.h"

target/i386/hvf/hvf-cpu.c

@@ -15,6 +15,7 @@
 #include "hw/boards.h"
 #include "sysemu/hvf.h"
 #include "hw/core/accel-cpu.h"
+#include "hvf-i386.h"
 
 static void hvf_cpu_max_instance_init(X86CPU *cpu)
 {

target/i386/hvf/hvf-i386.h

@@ -16,6 +16,8 @@
 #ifndef HVF_I386_H
 #define HVF_I386_H
 
+uint32_t hvf_get_supported_cpuid(uint32_t func, uint32_t idx, int reg);
+
 void hvf_handle_io(CPUArchState *, uint16_t, void *, int, int, int);
 
 /* Host specific functions */

target/i386/hvf/x86_cpuid.c

@@ -25,6 +25,7 @@
 #include "x86.h"
 #include "vmx.h"
 #include "sysemu/hvf.h"
+#include "hvf-i386.h"
 
 static bool xgetbv(uint32_t cpuid_ecx, uint32_t idx, uint64_t *xcr)
 {