Il 20/08/2014 05:17, Wanpeng Li ha scritto:
> + else if (spte & (1ULL << 7))
You have to check level == 1 specifically here, or add...
> + /*
> + * 1GB/2MB page, bits 29:12 or 20:12 reserved respectively,
> + * level == 1 if the hypervisor is using the ignored bit 7.
> + */
> + mask |= (PAGE_SIZE << ((level - 1) * 9)) - PAGE_SIZE;
> + else
... "if (level > 1)" here.
Otherwise, you're marking bits 6:3 as reserved for 4K pages. This
should cause a WARN, because KVM puts 0110 in those bits:
ret = (MTRR_TYPE_WRBACK << VMX_EPT_MT_EPTE_SHIFT)
| VMX_EPT_IPAT_BIT;
(in vmx_get_mt_mask: writeback memory, ignore PAT memory type from the
guest's page tables)
How are you testing this patch?
Paolo
> + /* bits 6:3 reserved */
> + mask |= 0x78;
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