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| author | Sean Christopherson <sean.j.christopherson@intel.com> | 2019-02-05 13:01:18 -0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-02-20 22:48:37 +0100 |
| commit | 164bf7e56c5a73f2f819c39ba7e0f20e0f97dc7b (patch) | |
| tree | b64283dd04a5aa6024d6fd6639db781bfe1c613e /include | |
| parent | 0e32958ec449a9bb63c031ed04ac7a494ea1bc1c (diff) | |
| download | linux-0-day-164bf7e56c5a73f2f819c39ba7e0f20e0f97dc7b.tar.gz linux-0-day-164bf7e56c5a73f2f819c39ba7e0f20e0f97dc7b.tar.xz | |
KVM: Move the memslot update in-progress flag to bit 63
...now that KVM won't explode by moving it out of bit 0. Using bit 63
eliminates the need to jump over bit 0, e.g. when calculating a new
memslots generation or when propagating the memslots generation to an
MMIO spte.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kvm_host.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 5e1cb74922b3d..85c0c00d51594 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -49,7 +49,7 @@ #define KVM_MEMSLOT_INVALID (1UL << 16) /* - * Bit 0 of the memslot generation number is an "update in-progress flag", + * Bit 63 of the memslot generation number is an "update in-progress flag", * e.g. is temporarily set for the duration of install_new_memslots(). * This flag effectively creates a unique generation number that is used to * mark cached memslot data, e.g. MMIO accesses, as potentially being stale, @@ -67,7 +67,7 @@ * the actual generation number against accesses that were inserted into the * cache *before* the memslots were updated. */ -#define KVM_MEMSLOT_GEN_UPDATE_IN_PROGRESS BIT_ULL(0) +#define KVM_MEMSLOT_GEN_UPDATE_IN_PROGRESS BIT_ULL(63) /* Two fragments for cross MMIO pages. */ #define KVM_MAX_MMIO_FRAGMENTS 2 |