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KVM: x86/mmu: Annotate tdp_enabled as being read-mostly

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Tag tdp_enabled with __read_mostly as the variable is only ever written
during vendor module load, same as all the other global MMU variables that
are handled by kvm_configure_mmu().

Opportunistically annotate the tdp_mmu_enabled and eager_page_split
declarations with __read_mostly, to match their definitions.  The compiler
will warn if there are conflicting annotations, i.e. there's minimal risk
of the declaration annotation becoming stale.

No functional change intended.

Reviewed-by: Kai Huang <kai.huang@intel.com>
Link: https://patch.msgid.link/20260625220450.3354415-3-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2026-06-25 15:04:43 -07:00
parent 26c877c70b
commit eb4b67c934
2 changed files with 4 additions and 4 deletions
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6
arch/x86/kvm/mmu.h
View File

@ -6,14 +6,14 @@
#include "regs.h"
#include "cpuid.h"
extern bool tdp_enabled;
extern bool __read_mostly tdp_enabled;
#ifdef CONFIG_X86_64
extern bool tdp_mmu_enabled;
extern bool __read_mostly tdp_mmu_enabled;
#else
#define tdp_mmu_enabled false
#endif
extern bool __read_mostly enable_mmio_caching;
extern bool eager_page_split;
extern bool __read_mostly eager_page_split;
#define KVM_MEMSLOT_PAGES_TO_MMU_PAGES_RATIO 50
#define KVM_MIN_ALLOC_MMU_PAGES 64UL

2
arch/x86/kvm/mmu/mmu.c
View File

@ -104,7 +104,7 @@ module_param_named(flush_on_reuse, force_flush_and_sync_on_reuse, bool, 0644);
* 2. while doing 1. it walks guest-physical to host-physical
* If the hardware supports that we don't need to do shadow paging.
*/
bool tdp_enabled = false;
bool __read_mostly tdp_enabled = false;
static bool __ro_after_init tdp_mmu_allowed;