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xen: move checks for e820 conflicts further up

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commit c4498ae316 upstream.

Move the checks for e820 memory map conflicts using the
xen_chk_is_e820_usable() helper further up in order to prepare
resolving some of the possible conflicts by doing some e820 map
modifications, which must happen before evaluating the RAM layout.

Signed-off-by: Juergen Gross <jgross@suse.com>
Tested-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Juergen Gross 2024-08-06 09:56:48 +02:00 committed by Greg Kroah-Hartman
parent 79fec62d0f
commit 161fd69123
1 changed files with 22 additions and 22 deletions
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44
arch/x86/xen/setup.c
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@ -855,6 +855,28 @@ char * __init xen_memory_setup(void)
/* Make sure the Xen-supplied memory map is well-ordered. */
e820__update_table(&xen_e820_table);
/*
* Check whether the kernel itself conflicts with the target E820 map.
* Failing now is better than running into weird problems later due
* to relocating (and even reusing) pages with kernel text or data.
*/
xen_chk_is_e820_usable(__pa_symbol(_text),
__pa_symbol(_end) - __pa_symbol(_text),
"kernel");
/*
* Check for a conflict of the xen_start_info memory with the target
* E820 map.
*/
xen_chk_is_e820_usable(__pa(xen_start_info), sizeof(*xen_start_info),
"xen_start_info");
/*
* Check for a conflict of the hypervisor supplied page tables with
* the target E820 map.
*/
xen_pt_check_e820();
max_pages = xen_get_max_pages();
/* How many extra pages do we need due to remapping? */
@ -927,28 +949,6 @@ char * __init xen_memory_setup(void)
e820__update_table(e820_table);
/*
* Check whether the kernel itself conflicts with the target E820 map.
* Failing now is better than running into weird problems later due
* to relocating (and even reusing) pages with kernel text or data.
*/
xen_chk_is_e820_usable(__pa_symbol(_text),
__pa_symbol(_end) - __pa_symbol(_text),
"kernel");
/*
* Check for a conflict of the xen_start_info memory with the target
* E820 map.
*/
xen_chk_is_e820_usable(__pa(xen_start_info), sizeof(*xen_start_info),
"xen_start_info");
/*
* Check for a conflict of the hypervisor supplied page tables with
* the target E820 map.
*/
xen_pt_check_e820();
xen_reserve_xen_mfnlist();
/* Check for a conflict of the initrd with the target E820 map. */