lguest: update comments to reflect LHCALL_LOAD_GDT_ENTRY. (9b6efcd2) · Commits · 戴 / test

arch/x86/lguest/boot.c

+8 −5

Original line number	Diff line number	Diff line
		@@ -324,9 +324,8 @@ static void lguest_load_gdt(const struct desc_ptr *desc)
		}

		/*
		* For a single GDT entry which changes, we do the lazy thing: alter our GDT,
		* then tell the Host to reload the entire thing. This operation is so rare
		* that this naive implementation is reasonable.
		* For a single GDT entry which changes, we simply change our copy and
		* then tell the host about it.
		*/
		static void lguest_write_gdt_entry(struct desc_struct *dt, int entrynum,
		const void *desc, int type)
		@@ -338,9 +337,13 @@ static void lguest_write_gdt_entry(struct desc_struct *dt, int entrynum,
		}

		/*
		* OK, I lied. There are three "thread local storage" GDT entries which change
		* There are three "thread local storage" GDT entries which change
		* on every context switch (these three entries are how glibc implements
		* __thread variables). So we have a hypercall specifically for this case.
		* __thread variables). As an optimization, we have a hypercall
		* specifically for this case.
		*
		* Wouldn't it be nicer to have a general LOAD_GDT_ENTRIES hypercall
		* which took a range of entries?
		*/
		static void lguest_load_tls(struct thread_struct *t, unsigned int cpu)
		{