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From b9745280736ee526374873aa3c4142596e2ba10b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marek=20Marczykowski-G=C3=B3recki?=
<marmarek@invisiblethingslab.com>
Date: Tue, 27 Feb 2024 14:09:19 +0100
Subject: [PATCH 16/67] libxl: Disable relocating memory for qemu-xen in
stubdomain too
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
According to comments (and experiments) qemu-xen cannot handle memory
reolcation done by hvmloader. The code was already disabled when running
qemu-xen in dom0 (see libxl__spawn_local_dm()), but it was missed when
adding qemu-xen support to stubdomain. Adjust libxl__spawn_stub_dm() to
be consistent in this regard.
Reported-by: Neowutran <xen@neowutran.ovh>
Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Reviewed-by: Jason Andryuk <jandryuk@gmail.com>
Acked-by: Anthony PERARD <anthony.perard@citrix.com>
master commit: 97883aa269f6745a6ded232be3a855abb1297e0d
master date: 2024-02-22 11:48:22 +0100
---
tools/libs/light/libxl_dm.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/tools/libs/light/libxl_dm.c b/tools/libs/light/libxl_dm.c
index 14b593110f..ed620a9d8e 100644
--- a/tools/libs/light/libxl_dm.c
+++ b/tools/libs/light/libxl_dm.c
@@ -2432,6 +2432,16 @@ void libxl__spawn_stub_dm(libxl__egc *egc, libxl__stub_dm_spawn_state *sdss)
"%s",
libxl_bios_type_to_string(guest_config->b_info.u.hvm.bios));
}
+ /* Disable relocating memory to make the MMIO hole larger
+ * unless we're running qemu-traditional and vNUMA is not
+ * configured. */
+ libxl__xs_printf(gc, XBT_NULL,
+ libxl__sprintf(gc, "%s/hvmloader/allow-memory-relocate",
+ libxl__xs_get_dompath(gc, guest_domid)),
+ "%d",
+ guest_config->b_info.device_model_version
+ == LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL &&
+ !libxl__vnuma_configured(&guest_config->b_info));
ret = xc_domain_set_target(ctx->xch, dm_domid, guest_domid);
if (ret<0) {
LOGED(ERROR, guest_domid, "setting target domain %d -> %d",
--
2.44.0
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