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| author | Juergen Gross <jgross@suse.com> | 2024-08-14 16:47:25 +0200 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2024-09-10 15:26:34 +0200 |
| commit | d05208cf7f05420ad10cc7f9550f91d485523659 (patch) | |
| tree | 6f141fa4f2bb23c18b190d90463b6d499f353204 /arch/x86/xen/xen-ops.h | |
| parent | xen: move max_pfn in xen_memory_setup() out of function scope (diff) | |
| download | linux-d05208cf7f05420ad10cc7f9550f91d485523659.tar.xz linux-d05208cf7f05420ad10cc7f9550f91d485523659.zip | |
xen: add capability to remap non-RAM pages to different PFNs
When running as a Xen PV dom0 it can happen that the kernel is being
loaded to a guest physical address conflicting with the host memory
map.
In order to be able to resolve this conflict, add the capability to
remap non-RAM areas to different guest PFNs. A function to use this
remapping information for other purposes than doing the remap will be
added when needed.
As the number of conflicts should be rather low (currently only
machines with max. 1 conflict are known), save the remap data in a
small statically allocated array.
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'arch/x86/xen/xen-ops.h')
| -rw-r--r-- | arch/x86/xen/xen-ops.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h index 9a27d1d653d3..e1b782e823e6 100644 --- a/arch/x86/xen/xen-ops.h +++ b/arch/x86/xen/xen-ops.h @@ -47,6 +47,9 @@ void xen_mm_unpin_all(void); #ifdef CONFIG_X86_64 void __init xen_relocate_p2m(void); #endif +void __init xen_do_remap_nonram(void); +void __init xen_add_remap_nonram(phys_addr_t maddr, phys_addr_t paddr, + unsigned long size); void __init xen_chk_is_e820_usable(phys_addr_t start, phys_addr_t size, const char *component); |