KVM: x86/mmu: Allow passing '-1' for "all" as_id for TDP MMU iterators

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Modify for_each_tdp_mmu_root() and __for_each_tdp_mmu_root_yield_safe() to
accept -1 for _as_id to mean "process all memslot address spaces".  That
way code that wants to process both SMM and !SMM doesn't need to iterate
over roots twice (and likely copy+paste code in the process).

Deliberately don't cast _as_id to an "int", just in case not casting helps
the compiler elide the "_as_id >=0" check when being passed an unsigned
value, e.g. from a memslot.

No functional change intended.

Link: https://lore.kernel.org/r/20240111020048.844847-4-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Sean Christopherson 2024-01-10 18:00:43 -08:00

parent fcdffe97f8

commit 6577f1efdf

1 changed files with 9 additions and 9 deletions

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arch/x86/kvm/mmu/tdp_mmu.c

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