lguest: use PGDIR_SHIFT for PAE code to allow different PAGE_OFFSET (fb100d78) · Commits · 戴 / test

We still assume the Guest and Host have the same PAGE_OFFSET settings, but now we don't assume 0xC0000000. Signed-off-by:

Rusty Russell <rusty@rustcorp.com.au> Cc: Matias Zabaljauregui <zabaljauregui@gmail.com>

drivers/lguest/page_tables.c

+2 −4

Original line number	Diff line number	Diff line
		@@ -996,11 +996,9 @@ static unsigned long setup_pagetables(struct lguest *lg,
		if (copy_to_user(&pgdir[0], &pgd, sizeof(pgd)) != 0)
		return -EFAULT;
		/*
		* And the third PGD entry (ie. addresses 3G-4G).
		*
		* FIXME: This assumes that PAGE_OFFSET for the Guest is 0xC0000000.
		* And the other PGD entry to make the linear mapping at PAGE_OFFSET
		*/
		if (copy_to_user(&pgdir[3], &pgd, sizeof(pgd)) != 0)
		if (copy_to_user(&pgdir[KERNEL_PGD_BOUNDARY], &pgd, sizeof(pgd)))
		return -EFAULT;
		#else
		/*