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lguest: rename switcher_page to switcher_pages.

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There is a single page with the Switcher in it, but it's followed by 2
pages per Host CPU.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2013-04-22 14:10:38 +09:30
parent c215a8b9eb
commit 856c608827
3 changed files with 19 additions and 19 deletions
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24
drivers/lguest/core.c
View File

@ -22,7 +22,7 @@
unsigned long switcher_addr;
static struct vm_struct *switcher_vma;
static struct page **switcher_page;
static struct page **switcher_pages;
/* This One Big lock protects all inter-guest data structures. */
DEFINE_MUTEX(lguest_lock);
@ -56,9 +56,9 @@ static __init int map_switcher(void)
* We allocate an array of struct page pointers. map_vm_area() wants
* this, rather than just an array of pages.
*/
switcher_page = kmalloc(sizeof(switcher_page[0])*TOTAL_SWITCHER_PAGES,
GFP_KERNEL);
if (!switcher_page) {
switcher_pages = kmalloc(sizeof(switcher_pages[0])*TOTAL_SWITCHER_PAGES,
GFP_KERNEL);
if (!switcher_pages) {
err = -ENOMEM;
goto out;
}
@ -68,8 +68,8 @@ static __init int map_switcher(void)
* so we make sure they're zeroed.
*/
for (i = 0; i < TOTAL_SWITCHER_PAGES; i++) {
switcher_page[i] = alloc_page(GFP_KERNEL|__GFP_ZERO);
if (!switcher_page[i]) {
switcher_pages[i] = alloc_page(GFP_KERNEL|__GFP_ZERO);
if (!switcher_pages[i]) {
err = -ENOMEM;
goto free_some_pages;
}
@ -110,7 +110,7 @@ static __init int map_switcher(void)
* array of struct pages. It increments that pointer, but we don't
* care.
*/
pagep = switcher_page;
pagep = switcher_pages;
err = map_vm_area(switcher_vma, PAGE_KERNEL_EXEC, &pagep);
if (err) {
printk("lguest: map_vm_area failed: %i\n", err);
@ -135,8 +135,8 @@ static __init int map_switcher(void)
i = TOTAL_SWITCHER_PAGES;
free_some_pages:
for (--i; i >= 0; i--)
__free_pages(switcher_page[i], 0);
kfree(switcher_page);
__free_pages(switcher_pages[i], 0);
kfree(switcher_pages);
out:
return err;
}
@ -151,8 +151,8 @@ static void unmap_switcher(void)
vunmap(switcher_vma->addr);
/* Now we just need to free the pages we copied the switcher into */
for (i = 0; i < TOTAL_SWITCHER_PAGES; i++)
__free_pages(switcher_page[i], 0);
kfree(switcher_page);
__free_pages(switcher_pages[i], 0);
kfree(switcher_pages);
}
/*H:032
@ -326,7 +326,7 @@ static int __init init(void)
goto out;
/* Now we set up the pagetable implementation for the Guests. */
err = init_pagetables(switcher_page, SHARED_SWITCHER_PAGES);
err = init_pagetables(switcher_pages, SHARED_SWITCHER_PAGES);
if (err)
goto unmap;

2
drivers/lguest/lg.h
View File

@ -15,7 +15,7 @@
#include <asm/lguest.h>
void free_pagetables(void);
int init_pagetables(struct page **switcher_page, unsigned int pages);
int init_pagetables(struct page **switcher_pages, unsigned int pages);
struct pgdir {
unsigned long gpgdir;

12
drivers/lguest/page_tables.c
View File

@ -1084,7 +1084,7 @@ static void free_switcher_pte_pages(void)
* Currently the Switcher is less than a page long, so "pages" is always 1.
*/
static __init void populate_switcher_pte_page(unsigned int cpu,
struct page *switcher_page[],
struct page *switcher_pages[],
unsigned int pages)
{
unsigned int i;
@ -1092,7 +1092,7 @@ static __init void populate_switcher_pte_page(unsigned int cpu,
/* The first entries are easy: they map the Switcher code. */
for (i = 0; i < pages; i++) {
set_pte(&pte[i], mk_pte(switcher_page[i],
set_pte(&pte[i], mk_pte(switcher_pages[i],
__pgprot(_PAGE_PRESENT|_PAGE_ACCESSED)));
}
@ -1100,14 +1100,14 @@ static __init void populate_switcher_pte_page(unsigned int cpu,
i = pages + cpu*2;
/* First page (Guest registers) is writable from the Guest */
set_pte(&pte[i], pfn_pte(page_to_pfn(switcher_page[i]),
set_pte(&pte[i], pfn_pte(page_to_pfn(switcher_pages[i]),
__pgprot(_PAGE_PRESENT|_PAGE_ACCESSED|_PAGE_RW)));
/*
* The second page contains the "struct lguest_ro_state", and is
* read-only.
*/
set_pte(&pte[i+1], pfn_pte(page_to_pfn(switcher_page[i+1]),
set_pte(&pte[i+1], pfn_pte(page_to_pfn(switcher_pages[i+1]),
__pgprot(_PAGE_PRESENT|_PAGE_ACCESSED)));
}
@ -1128,7 +1128,7 @@ static __init void populate_switcher_pte_page(unsigned int cpu,
* At boot or module load time, init_pagetables() allocates and populates
* the Switcher PTE page for each CPU.
*/
__init int init_pagetables(struct page **switcher_page, unsigned int pages)
__init int init_pagetables(struct page **switcher_pages, unsigned int pages)
{
unsigned int i;
@ -1138,7 +1138,7 @@ __init int init_pagetables(struct page **switcher_page, unsigned int pages)
free_switcher_pte_pages();
return -ENOMEM;
}
populate_switcher_pte_page(i, switcher_page, pages);
populate_switcher_pte_page(i, switcher_pages, pages);
}
return 0;
}