Joerg Roedel wrote:
Subject: [PATCH] kvm/mmu: fix reserved bit checking on 4kb pte level
The reserved bits checking code looks at bit 7 of the pte to determine
if it has to use the mask for a large pte or a normal pde. This does not
work on 4kb pte level because bit 7 is used there for PAT. Account this
in the checking function.
static bool is_rsvd_bits_set(struct kvm_vcpu *vcpu, u64 gpte, int level)
{
- int bit7;
+ int bit7 = 0;
+
+ if (level != PT_PAGE_TABLE_LEVEL)
+ bit7 = (gpte >> 7) & 1;
- bit7 = (gpte >> 7) & 1;
return (gpte & vcpu->arch.mmu.rsvd_bits_mask[bit7][level-1]) != 0;
}
If we make rsvd_bits_mask[1][0] == rsvd_bits_mask[0][0], we don't need
the extra check. That's why it is named bit7 and not pse (need to make
sure bit 7 is not reserved in this case).
--
error compiling committee.c: too many arguments to function
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
