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KVM: mmio: cleanup kvm_set_mmio_spte_mask 

Just reuse rsvd_bits() inside kvm_set_mmio_spte_mask()
for slightly better code.

Signed-off-by: Tiejun Chen <tiejun.chen@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Tiejun Chen 2014-09-01 18:44:04 +08:00 committed by Paolo Bonzini
parent 56f17dd3fb
commit d143148383
3 changed files with 6 additions and 6 deletions
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5
arch/x86/kvm/mmu.c
View File

@ -295,11 +295,6 @@ static bool check_mmio_spte(struct kvm *kvm, u64 spte)
return likely(kvm_gen == spte_gen);
}
static inline u64 rsvd_bits(int s, int e)
{
return ((1ULL << (e - s + 1)) - 1) << s;
}
void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
u64 dirty_mask, u64 nx_mask, u64 x_mask)
{

5
arch/x86/kvm/mmu.h
View File

@ -56,6 +56,11 @@
#define PFERR_RSVD_MASK (1U << PFERR_RSVD_BIT)
#define PFERR_FETCH_MASK (1U << PFERR_FETCH_BIT)
static inline u64 rsvd_bits(int s, int e)
{
return ((1ULL << (e - s + 1)) - 1) << s;
}
int kvm_mmu_get_spte_hierarchy(struct kvm_vcpu *vcpu, u64 addr, u64 sptes[4]);
void kvm_mmu_set_mmio_spte_mask(u64 mmio_mask);

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

@ -5569,7 +5569,7 @@ static void kvm_set_mmio_spte_mask(void)
* entry to generate page fault with PFER.RSV = 1.
*/
/* Mask the reserved physical address bits. */
mask = ((1ull << (51 - maxphyaddr + 1)) - 1) << maxphyaddr;
mask = rsvd_bits(maxphyaddr, 51);
/* Bit 62 is always reserved for 32bit host. */
mask |= 0x3ull << 62;