Re: How to change page permission from inside the kernel?

It sounds like the only permission you care about is the permission of the _guest_ writing to that memory, not the permission of the qemu-kvm userspace program writing to that memory. Yes that is perhaps what I meant.

You may be looking at the wrong page mapping to manipulate.

I think that it is still the same mapping because hva created by qemu-kvm is the one used by the guest (after another layer of paging ?). I will check TLB specs and verify valdis worries about problems with interfering data moving to TLB. But I think I moved away from the original question. So I will re-ask it again, How can i change set R/O protection to a page from inside a kernel module ? That was the current problem I was facing.

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