diff options
Diffstat (limited to 'arch/powerpc/platforms/pseries/cmm.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/cmm.c | 38 |
1 files changed, 36 insertions, 2 deletions
diff --git a/arch/powerpc/platforms/pseries/cmm.c b/arch/powerpc/platforms/pseries/cmm.c index 66e7227469b8..4ac419c7eb4c 100644 --- a/arch/powerpc/platforms/pseries/cmm.c +++ b/arch/powerpc/platforms/pseries/cmm.c @@ -37,10 +37,12 @@ #include <asm/hvcall.h> #include <asm/mmu.h> #include <asm/pgalloc.h> -#include <asm/uaccess.h> +#include <linux/uaccess.h> #include <linux/memory.h> #include <asm/plpar_wrappers.h> +#include "pseries.h" + #define CMM_DRIVER_VERSION "1.0.0" #define CMM_DEFAULT_DELAY 1 #define CMM_HOTPLUG_DELAY 5 @@ -74,7 +76,7 @@ module_param_named(delay, delay, uint, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(delay, "Delay (in seconds) between polls to query hypervisor paging requests. " "[Default=" __stringify(CMM_DEFAULT_DELAY) "]"); module_param_named(hotplug_delay, hotplug_delay, uint, S_IRUGO | S_IWUSR); -MODULE_PARM_DESC(delay, "Delay (in seconds) after memory hotplug remove " +MODULE_PARM_DESC(hotplug_delay, "Delay (in seconds) after memory hotplug remove " "before loaning resumes. " "[Default=" __stringify(CMM_HOTPLUG_DELAY) "]"); module_param_named(oom_kb, oom_kb, uint, S_IRUGO | S_IWUSR); @@ -109,6 +111,38 @@ static int hotplug_occurred; /* protected by the hotplug mutex */ static struct task_struct *cmm_thread_ptr; +static long plpar_page_set_loaned(unsigned long vpa) +{ + unsigned long cmo_page_sz = cmo_get_page_size(); + long rc = 0; + int i; + + for (i = 0; !rc && i < PAGE_SIZE; i += cmo_page_sz) + rc = plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_LOANED, vpa + i, 0); + + for (i -= cmo_page_sz; rc && i != 0; i -= cmo_page_sz) + plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_ACTIVE, + vpa + i - cmo_page_sz, 0); + + return rc; +} + +static long plpar_page_set_active(unsigned long vpa) +{ + unsigned long cmo_page_sz = cmo_get_page_size(); + long rc = 0; + int i; + + for (i = 0; !rc && i < PAGE_SIZE; i += cmo_page_sz) + rc = plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_ACTIVE, vpa + i, 0); + + for (i -= cmo_page_sz; rc && i != 0; i -= cmo_page_sz) + plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_LOANED, + vpa + i - cmo_page_sz, 0); + + return rc; +} + /** * cmm_alloc_pages - Allocate pages and mark them as loaned * @nr: number of pages to allocate |