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 <jgr...@suse.com>
Tested-by: Petr Tesarik <ptesa...@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrov...@oracle.com>
Reviewed-by: Daniel Kiper <daniel.ki...@oracle.com>
---
Changes in V3:
- rebased to recent Xen patches
Changes in V2:
- use __pa_symbol() (Boris Ostrovsky)
- remove unneeded casts (Jan Beulich)
---
arch/x86/xen/mmu_pv.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c
index 284d189f40dd..9657187bc7bd 100644
--- a/arch/x86/xen/mmu_pv.c
+++ b/arch/x86/xen/mmu_pv.c
@@ -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 */
--
2.12.0
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