diff options
| author | Sean Christopherson <seanjc@google.com> | 2025-11-12 09:39:44 -0800 |
|---|---|---|
| committer | Dave Hansen <dave.hansen@linux.intel.com> | 2025-11-12 15:29:38 -0800 |
| commit | 6276c67f2bc4aeaf350a7cf889c33c38b3330ea9 (patch) | |
| tree | a10fa274f08e59aa940cd26effa92d595fb483d4 /arch/x86/events/intel/pt.c | |
| parent | e6f2d5866c55d9ed4d61c22692848b029ccd4f6c (diff) | |
x86: Restrict KVM-induced symbol exports to KVM modules where obvious/possible
Extend KVM's export macro framework to provide EXPORT_SYMBOL_FOR_KVM(),
and use the helper macro to export symbols for KVM throughout x86 if and
only if KVM will build one or more modules, and only for those modules.
To avoid unnecessary exports when CONFIG_KVM=m but kvm.ko will not be
built (because no vendor modules are selected), let arch code #define
EXPORT_SYMBOL_FOR_KVM to suppress/override the exports.
Note, the set of symbols to restrict to KVM was generated by manual search
and audit; any "misses" are due to human error, not some grand plan.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Kai Huang <kai.huang@intel.com>
Tested-by: Kai Huang <kai.huang@intel.com>
Link: https://patch.msgid.link/20251112173944.1380633-5-seanjc%40google.com
Diffstat (limited to 'arch/x86/events/intel/pt.c')
| -rw-r--r-- | arch/x86/events/intel/pt.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/x86/events/intel/pt.c b/arch/x86/events/intel/pt.c index e8cf29d2b10c..44524a387c58 100644 --- a/arch/x86/events/intel/pt.c +++ b/arch/x86/events/intel/pt.c @@ -17,6 +17,7 @@ #include <linux/limits.h> #include <linux/slab.h> #include <linux/device.h> +#include <linux/kvm_types.h> #include <asm/cpuid/api.h> #include <asm/perf_event.h> @@ -82,13 +83,13 @@ u32 intel_pt_validate_cap(u32 *caps, enum pt_capabilities capability) return (c & cd->mask) >> shift; } -EXPORT_SYMBOL_GPL(intel_pt_validate_cap); +EXPORT_SYMBOL_FOR_KVM(intel_pt_validate_cap); u32 intel_pt_validate_hw_cap(enum pt_capabilities cap) { return intel_pt_validate_cap(pt_pmu.caps, cap); } -EXPORT_SYMBOL_GPL(intel_pt_validate_hw_cap); +EXPORT_SYMBOL_FOR_KVM(intel_pt_validate_hw_cap); static ssize_t pt_cap_show(struct device *cdev, struct device_attribute *attr, @@ -1590,7 +1591,7 @@ void intel_pt_handle_vmx(int on) local_irq_restore(flags); } -EXPORT_SYMBOL_GPL(intel_pt_handle_vmx); +EXPORT_SYMBOL_FOR_KVM(intel_pt_handle_vmx); /* * PMU callbacks |