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/kernel/cpu/amd.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/kernel/cpu/amd.c')
| -rw-r--r-- | arch/x86/kernel/cpu/amd.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index 8e36964a7721..69a3c02cab48 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -3,7 +3,7 @@ #include <linux/bitops.h> #include <linux/elf.h> #include <linux/mm.h> - +#include <linux/kvm_types.h> #include <linux/io.h> #include <linux/sched.h> #include <linux/sched/clock.h> @@ -1310,7 +1310,7 @@ unsigned long amd_get_dr_addr_mask(unsigned int dr) return per_cpu(amd_dr_addr_mask[dr], smp_processor_id()); } -EXPORT_SYMBOL_GPL(amd_get_dr_addr_mask); +EXPORT_SYMBOL_FOR_KVM(amd_get_dr_addr_mask); static void zenbleed_check_cpu(void *unused) { |