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From 69f771c3dc641431f3e98497cbd3832edb69284f Mon Sep 17 00:00:00 2001
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From: Eric Auger <eric.auger@redhat.com>
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Date: Tue, 3 May 2022 08:56:52 +0200
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Subject: [PATCH 1/5] hw/arm/virt: Remove the dtb-kaslr-seed machine option
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RH-Author: Eric Auger <eric.auger@redhat.com>
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RH-MergeRequest: 82: hw/arm/virt: Remove the dtb-kaslr-seed machine option
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RH-Commit: [1/2] a89dcd7f22e04ae39de99795d3f34cdd0b831bc0 (eauger1/centos-qemu-kvm)
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RH-Bugzilla: 2046029
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RH-Acked-by: Gavin Shan <gshan@redhat.com>
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RH-Acked-by: Andrew Jones <drjones@redhat.com>
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2046029
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Brew: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=45133161
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Upstream Status: RHEL-only
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Tested: Boot RHEL guest and check the option is not available
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In RHEL we do not want to expose the dtb-kaslr-seed virt machine
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option. Indeed the default 'on' value matches our need as
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random data in the DTB does not cause any boot failure and we
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want to support KASLR for the guest.
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Signed-off-by: Eric Auger <eric.auger@redhat.com>
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---
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---
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hw/arm/virt.c | 11 +++--------
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1 file changed, 3 insertions(+), 8 deletions(-)
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diff --git a/hw/arm/virt.c b/hw/arm/virt.c
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index e06862d22a..bde4f77994 100644
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--- a/hw/arm/virt.c
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+++ b/hw/arm/virt.c
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@@ -2350,6 +2350,7 @@ static void virt_set_its(Object *obj, bool value, Error **errp)
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vms->its = value;
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}
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+#if 0 /* Disabled for Red Hat Enterprise Linux */
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static bool virt_get_dtb_kaslr_seed(Object *obj, Error **errp)
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{
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VirtMachineState *vms = VIRT_MACHINE(obj);
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@@ -2363,6 +2364,7 @@ static void virt_set_dtb_kaslr_seed(Object *obj, bool value, Error **errp)
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vms->dtb_kaslr_seed = value;
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}
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+#endif /* disabled for RHEL */
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static char *virt_get_oem_id(Object *obj, Error **errp)
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{
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@@ -3346,13 +3348,6 @@ static void rhel_machine_class_init(ObjectClass *oc, void *data)
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"Override the default value of field OEM Table ID "
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"in ACPI table header."
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"The string may be up to 8 bytes in size");
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-
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- object_class_property_add_bool(oc, "dtb-kaslr-seed",
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- virt_get_dtb_kaslr_seed,
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- virt_set_dtb_kaslr_seed);
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- object_class_property_set_description(oc, "dtb-kaslr-seed",
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- "Set off to disable passing of kaslr-seed "
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- "dtb node to guest");
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}
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static void rhel_virt_instance_init(Object *obj)
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@@ -3397,7 +3392,7 @@ static void rhel_virt_instance_init(Object *obj)
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/* MTE is disabled by default and non-configurable for RHEL */
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vms->mte = false;
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- /* Supply a kaslr-seed by default */
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+ /* Supply a kaslr-seed by default and non-configurable for RHEL */
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vms->dtb_kaslr_seed = true;
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vms->irqmap = a15irqmap;
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--
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2.31.1
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