diff options
| author | Heiko Carstens <hca@linux.ibm.com> | 2023-10-27 14:12:37 +0200 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2023-11-05 22:34:58 +0100 |
| commit | a3e89e20fe00209779eb3e419621070b9158acdb (patch) | |
| tree | 408b99b38141eb30c1392d16e6f2e43038298736 /arch/s390/include | |
| parent | 468a3bc2b7b955a7cf97d47c6022bf1ae4a538a3 (diff) | |
s390/cmma: move set_page_stable() and friends to header file
In order to be usable for early boot code move the simple set_page_xxx()
function to header file. Also change the parameters, and the function names
slightly.
This is required since there aren't any struct pages available in early
boot code, and renaming of functions is done to make sure that all users
are converted to the new API.
Instead of a pointer to a struct page a virtual address is passed, and
instead of an order the number of pages for which the page state needs be
set.
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/page-states.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/s390/include/asm/page-states.h b/arch/s390/include/asm/page-states.h index 659e3c963ce6..1eae4046c07d 100644 --- a/arch/s390/include/asm/page-states.h +++ b/arch/s390/include/asm/page-states.h @@ -8,6 +8,7 @@ #define PAGE_STATES_H #include <asm/sections.h> +#include <asm/page.h> #define ESSA_GET_STATE 0 #define ESSA_SET_STABLE 1 @@ -22,4 +23,41 @@ extern int __bootdata_preserved(cmma_flag); +static __always_inline unsigned long essa(unsigned long paddr, unsigned char cmd) +{ + unsigned long rc; + + asm volatile( + " .insn rrf,0xb9ab0000,%[rc],%[paddr],%[cmd],0" + : [rc] "=d" (rc) + : [paddr] "d" (paddr), + [cmd] "i" (cmd)); + return rc; +} + +static __always_inline void __set_page_state(void *addr, unsigned long num_pages, unsigned char cmd) +{ + unsigned long paddr = __pa(addr) & PAGE_MASK; + + while (num_pages--) { + essa(paddr, cmd); + paddr += PAGE_SIZE; + } +} + +static inline void __set_page_unused(void *addr, unsigned long num_pages) +{ + __set_page_state(addr, num_pages, ESSA_SET_UNUSED); +} + +static inline void __set_page_stable_dat(void *addr, unsigned long num_pages) +{ + __set_page_state(addr, num_pages, ESSA_SET_STABLE); +} + +static inline void __set_page_stable_nodat(void *addr, unsigned long num_pages) +{ + __set_page_state(addr, num_pages, ESSA_SET_STABLE_NODAT); +} + #endif |