All of lore.kernel.org
 help / color / mirror / Atom feed
From: Juergen Gross <jgross@suse.com>
To: linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org
Cc: boris.ostrovsky@oracle.com, ptesarik@suse.com,
	Juergen Gross <jgross@suse.com>
Subject: [PATCH v2] xen,kdump: handle pv domain in paddr_vmcoreinfo_note()
Date: Fri, 31 Mar 2017 12:14:38 +0200	[thread overview]
Message-ID: <20170331101438.28582-1-jgross@suse.com> (raw)

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>
---
Changes in V2:
- use __pa_symbol() (Boris Ostrovsky)
- remove unneeded casts (Jan Beulich)

This patch needs to be rebased on top of Vitaly's series to split
pv- and hvm-code. I'll do this as soon as his series is in the Xen
tree in its final form.
---
 arch/x86/xen/mmu.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 37cb5aa..33ab96c 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.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>
 
@@ -2903,3 +2906,13 @@ int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
 	return -EINVAL;
 }
 EXPORT_SYMBOL_GPL(xen_unmap_domain_gfn_range);
+
+#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 */
-- 
2.10.2

             reply	other threads:[~2017-03-31 10:14 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-31 10:14 Juergen Gross [this message]
2017-03-31 14:02 ` Boris Ostrovsky
2017-03-31 14:02   ` [PATCH v2] xen, kdump: " Boris Ostrovsky
2017-04-03 12:42 ` [Xen-devel] " Daniel Kiper
2017-04-03 12:42   ` Daniel Kiper
2017-04-04 11:55   ` [Xen-devel] " Juergen Gross
2017-04-04 11:55   ` Juergen Gross
2017-04-11 12:45   ` Juergen Gross
2017-04-11 12:45   ` [Xen-devel] " Juergen Gross
2017-04-11 13:00     ` Daniel Kiper
2017-04-11 14:59       ` Petr Tesarik
2017-04-11 17:20         ` Daniel Kiper
2017-04-11 17:20         ` [Xen-devel] " Daniel Kiper
2017-04-14 16:53           ` Petr Tesarik
2017-04-14 16:53           ` [Xen-devel] " Petr Tesarik
2017-04-14 22:26             ` Daniel Kiper
2017-04-15 14:35               ` Petr Tesarik
2017-04-15 14:35               ` Petr Tesarik
2017-04-14 22:26             ` Daniel Kiper
2017-04-11 14:59       ` Petr Tesarik
2017-04-11 13:00     ` Daniel Kiper
  -- strict thread matches above, loose matches on Subject: below --
2017-04-04 19:42 [Xen-devel] " Daniel Kiper
2017-04-05 11:13 ` Petr Tesarik
2017-04-07  9:16   ` Petr Tesarik
2017-04-07  9:16   ` [Xen-devel] " Petr Tesarik
2017-04-10 20:49     ` Daniel Kiper
2017-04-11 10:49       ` Petr Tesarik
2017-04-05 11:13 ` Petr Tesarik
2017-04-04 19:42 Daniel Kiper
2017-03-31 10:14 Juergen Gross

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20170331101438.28582-1-jgross@suse.com \
    --to=jgross@suse.com \
    --cc=boris.ostrovsky@oracle.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=ptesarik@suse.com \
    --cc=xen-devel@lists.xenproject.org \
    --subject='Re: [PATCH v2] xen,kdump: handle pv domain in paddr_vmcoreinfo_note()' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.