Esempi in C++ (Cpp) per ept_clear_l1_epte

Esempio n. 1

File: ept.c Progetto: jyizheng/dune

static int ept_set_epte(struct vmx_vcpu *vcpu, int make_write,
			unsigned long gpa, unsigned long hva)
{
	int ret;
	epte_t *epte, flags;
	struct page *page;

	ret = get_user_pages_fast(hva, 1, make_write, &page);
	if (ret != 1) {
		printk(KERN_ERR "ept: failed to get user page %lx\n", hva);
		return ret;
	}

	spin_lock(&vcpu->ept_lock);

	ret = ept_lookup_gpa(vcpu, (void *) gpa,
			     PageHuge(page) ? 1 : 0, 1, &epte);
	if (ret) {
		spin_unlock(&vcpu->ept_lock);
		printk(KERN_ERR "ept: failed to lookup EPT entry\n");
		return ret;
	}

	if (epte_present(*epte)) {
		if (!epte_big(*epte) && PageHuge(page))
			ept_clear_l1_epte(epte);
		else
			ept_clear_epte(epte);
	}

	flags = __EPTE_READ | __EPTE_EXEC |
		__EPTE_TYPE(EPTE_TYPE_WB) | __EPTE_IPAT;
	if (make_write)
		flags |= __EPTE_WRITE;
	if (vcpu->ept_ad_enabled) {
		/* premark A/D to avoid extra memory references */
		flags |= __EPTE_A;
		if (make_write)
			flags |= __EPTE_D;
	}

	if (PageHuge(page)) {
		flags |= __EPTE_SZ;
		*epte = epte_addr(page_to_phys(page) & ~((1 << 21) - 1)) |
			flags;
	} else
		*epte = epte_addr(page_to_phys(page)) | flags;

	spin_unlock(&vcpu->ept_lock);

	return 0;
}

Esempio n. 2

File: ept.c Progetto: peimichael/dune

static int ept_set_epte(struct vmx_vcpu *vcpu, int make_write,
			unsigned long gpa, unsigned long hva)
{
	int ret;
	epte_t *epte, flags;
	struct page *page;
	unsigned huge_shift;
	int level;

	ret = get_user_pages_fast(hva, 1, make_write, &page);
	if (ret != 1) {
		ret = ept_set_pfnmap_epte(vcpu, make_write, gpa, hva);
		if (ret)
			printk(KERN_ERR "ept: failed to get user page %lx\n", hva);
		return ret;
	}

	spin_lock(&vcpu->ept_lock);

	huge_shift = compound_order(compound_head(page)) + PAGE_SHIFT;
	level = 0;
	if (huge_shift == 30)
		level = 2;
	else if (huge_shift == 21)
		level = 1;

	ret = ept_lookup_gpa(vcpu, (void *) gpa,
			     level, 1, &epte);
	if (ret) {
		spin_unlock(&vcpu->ept_lock);
		put_page(page);
		printk(KERN_ERR "ept: failed to lookup EPT entry\n");
		return ret;
	}

	if (epte_present(*epte)) {
		if (!epte_big(*epte) && level == 2)
			ept_clear_l2_epte(epte);
		else if (!epte_big(*epte) && level == 1)
			ept_clear_l1_epte(epte);
		else
			ept_clear_epte(epte);
	}

	flags = __EPTE_READ | __EPTE_EXEC |
		__EPTE_TYPE(EPTE_TYPE_WB) | __EPTE_IPAT;
	if (make_write)
		flags |= __EPTE_WRITE;
	if (vcpu->ept_ad_enabled) {
		/* premark A/D to avoid extra memory references */
		flags |= __EPTE_A;
		if (make_write)
			flags |= __EPTE_D;
	}

	if (level) {
		struct page *tmp = page;
		page = compound_head(page);
		get_page(page);
		put_page(tmp);

		flags |= __EPTE_SZ;
	}

	*epte = epte_addr(page_to_phys(page)) | flags;

	spin_unlock(&vcpu->ept_lock);

	return 0;
}