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xen,kdump: handle pv domain in paddr_vmcoreinfo_note()

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For kdump to work correctly it needs the physical address of
vmcoreinfo_note. When running as dom0 this means the virtual address
has to be translated to the related machine address.

paddr_vmcoreinfo_note() is meant to do the translation via
__pa_symbol() only, but being attributed "weak" it can be replaced
easily in Xen case.

Signed-off-by: Juergen Gross <jgross@suse.com>
Tested-by: Petr Tesarik <ptesarik@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
Juergen Gross 2017-04-11 18:14:26 +02:00
parent 8945c08e2b
commit 29985b0961
1 changed files with 13 additions and 0 deletions
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13
arch/x86/xen/mmu_pv.c
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@ -49,6 +49,9 @@
#include <linux/memblock.h>
#include <linux/seq_file.h>
#include <linux/crash_dump.h>
#ifdef CONFIG_KEXEC_CORE
#include <linux/kexec.h>
#endif
#include <trace/events/xen.h>
@ -2715,3 +2718,13 @@ void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order)
spin_unlock_irqrestore(&xen_reservation_lock, flags);
}
EXPORT_SYMBOL_GPL(xen_destroy_contiguous_region);
#ifdef CONFIG_KEXEC_CORE
phys_addr_t paddr_vmcoreinfo_note(void)
{
if (xen_pv_domain())
return virt_to_machine(&vmcoreinfo_note).maddr;
else
return __pa_symbol(&vmcoreinfo_note);
}
#endif /* CONFIG_KEXEC_CORE */