mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 09:56:40 +07:00
08b46d5dd8
We've got a number of defines related to the E820 table and its size: E820MAP E820NR E820_X_MAX E820MAX The first two denote byte offsets into the zeropage (struct boot_params), and can are not used in the kernel and can be removed. The E820_*_MAX values have an inconsistent structure and it's unclear in any case what they mean. 'X' presuably goes for extended - but it's not very expressive altogether. Change these over to: E820_MAX_ENTRIES_ZEROPAGE E820_MAX_ENTRIES ... which are self-explanatory names. No change in functionality. Cc: Alex Thorlton <athorlton@sgi.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
#ifndef _XEN_PAGE_H
|
|
#define _XEN_PAGE_H
|
|
|
|
#include <asm/page.h>
|
|
|
|
/* The hypercall interface supports only 4KB page */
|
|
#define XEN_PAGE_SHIFT 12
|
|
#define XEN_PAGE_SIZE (_AC(1, UL) << XEN_PAGE_SHIFT)
|
|
#define XEN_PAGE_MASK (~(XEN_PAGE_SIZE-1))
|
|
#define xen_offset_in_page(p) ((unsigned long)(p) & ~XEN_PAGE_MASK)
|
|
|
|
/*
|
|
* We assume that PAGE_SIZE is a multiple of XEN_PAGE_SIZE
|
|
* XXX: Add a BUILD_BUG_ON?
|
|
*/
|
|
|
|
#define xen_pfn_to_page(xen_pfn) \
|
|
(pfn_to_page((unsigned long)(xen_pfn) >> (PAGE_SHIFT - XEN_PAGE_SHIFT)))
|
|
#define page_to_xen_pfn(page) \
|
|
((page_to_pfn(page)) << (PAGE_SHIFT - XEN_PAGE_SHIFT))
|
|
|
|
#define XEN_PFN_PER_PAGE (PAGE_SIZE / XEN_PAGE_SIZE)
|
|
|
|
#define XEN_PFN_DOWN(x) ((x) >> XEN_PAGE_SHIFT)
|
|
#define XEN_PFN_UP(x) (((x) + XEN_PAGE_SIZE-1) >> XEN_PAGE_SHIFT)
|
|
#define XEN_PFN_PHYS(x) ((phys_addr_t)(x) << XEN_PAGE_SHIFT)
|
|
|
|
#include <asm/xen/page.h>
|
|
|
|
/* Return the GFN associated to the first 4KB of the page */
|
|
static inline unsigned long xen_page_to_gfn(struct page *page)
|
|
{
|
|
return pfn_to_gfn(page_to_xen_pfn(page));
|
|
}
|
|
|
|
struct xen_memory_region {
|
|
unsigned long start_pfn;
|
|
unsigned long n_pfns;
|
|
};
|
|
|
|
#define XEN_EXTRA_MEM_MAX_REGIONS 128 /* == E820_MAX_ENTRIES_ZEROPAGE */
|
|
|
|
extern __initdata
|
|
struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS];
|
|
|
|
extern unsigned long xen_released_pages;
|
|
|
|
#endif /* _XEN_PAGE_H */
|