KVM: SVM: Mark SEV launch secret pages as dirty.

	struct kvm_sev_launch_secret params;

	struct page **pages;

	void *blob, *hdr;

	unsigned long n;

	unsigned long n, i;

	int ret, offset;

	if (!sev_guest(kvm))

	if (IS_ERR(pages))

		return PTR_ERR(pages);

	/*

	 * The LAUNCH_SECRET command will perform in-place encryption of the

	 * memory content (i.e it will write the same memory region with C=1).

	 * It's possible that the cache may contain the data with C=0, i.e.,

	 * unencrypted so invalidate it first.

	 */

	sev_clflush_pages(pages, n);

	/*

	 * The secret must be copied into contiguous memory region, lets verify

	 * that userspace memory pages are contiguous before we issue command.

e_free:

	kfree(data);

e_unpin_memory:

	/* content of memory is updated, mark pages dirty */

	for (i = 0; i < n; i++) {

		set_page_dirty_lock(pages[i]);

		mark_page_accessed(pages[i]);

	}

	sev_unpin_memory(kvm, pages, n);

	return ret;

}