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106 lines
4.9 KiB
106 lines
4.9 KiB
2 days ago
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From 9ebd1d71a61e4e036e65452c1c04516ea58d74b7 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= <berrange@redhat.com>
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Date: Mon, 3 Jul 2023 09:53:43 +0100
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Subject: [PATCH] dbus: add 'ConfidentialVirtualization' property to manager
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object
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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This property reports whether the system is running inside a confidential
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virtual machine.
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Related: https://github.com/systemd/systemd/issues/27604
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Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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(cherry picked from commit 1257274ad8eb0790bc3b56ba68b114c5e1e24713)
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Related: RHEL-50651
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---
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man/org.freedesktop.systemd1.xml | 10 ++++++++++
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src/core/dbus-manager.c | 23 +++++++++++++++++++++++
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2 files changed, 33 insertions(+)
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diff --git a/man/org.freedesktop.systemd1.xml b/man/org.freedesktop.systemd1.xml
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index 7ee649f6a7..78781b6ed3 100644
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--- a/man/org.freedesktop.systemd1.xml
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+++ b/man/org.freedesktop.systemd1.xml
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@@ -293,6 +293,8 @@ node /org/freedesktop/systemd1 {
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@org.freedesktop.DBus.Property.EmitsChangedSignal("const")
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readonly s Virtualization = '...';
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@org.freedesktop.DBus.Property.EmitsChangedSignal("const")
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+ readonly s ConfidentialVirtualization = '...';
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+ @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
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readonly s Architecture = '...';
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@org.freedesktop.DBus.Property.EmitsChangedSignal("const")
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readonly s Tainted = '...';
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@@ -974,6 +976,8 @@ node /org/freedesktop/systemd1 {
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<variablelist class="dbus-property" generated="True" extra-ref="Virtualization"/>
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+ <variablelist class="dbus-property" generated="True" extra-ref="ConfidentialVirtualization"/>
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+
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<variablelist class="dbus-property" generated="True" extra-ref="Architecture"/>
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<variablelist class="dbus-property" generated="True" extra-ref="Tainted"/>
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@@ -1695,6 +1699,12 @@ node /org/freedesktop/systemd1 {
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Note that only the "innermost" virtualization technology is exported here. This detects both
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full-machine virtualizations (VMs) and shared-kernel virtualization (containers).</para>
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+ <para><varname>ConfidentialVirtualization</varname> contains a short ID string describing the confidential
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+ virtualization technology the system runs in. On bare-metal hardware this is the empty string. Otherwise,
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+ it contains an identifier such as <literal>sev</literal>, <literal>sev-es</literal>, <literal>sev-snp</literal>,
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+ <literal>tdx</literal> and so on. For a full list of IDs see
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+ <citerefentry><refentrytitle>systemd-detect-virt</refentrytitle><manvolnum>1</manvolnum></citerefentry></para>.
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+
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<para><varname>Architecture</varname> contains a short ID string describing the architecture the
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systemd instance is running on. This follows the same vocabulary as
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<varname>ConditionArchitectures=</varname>.</para>
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diff --git a/src/core/dbus-manager.c b/src/core/dbus-manager.c
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index 44b1027588..386b319c86 100644
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--- a/src/core/dbus-manager.c
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+++ b/src/core/dbus-manager.c
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@@ -12,6 +12,7 @@
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#include "bus-get-properties.h"
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#include "bus-log-control-api.h"
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#include "chase-symlinks.h"
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+#include "confidential-virt.h"
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#include "data-fd-util.h"
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#include "dbus-cgroup.h"
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#include "dbus-execute.h"
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@@ -91,6 +92,27 @@ static int property_get_virtualization(
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v == VIRTUALIZATION_NONE ? NULL : virtualization_to_string(v));
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}
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+static int property_get_confidential_virtualization(
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+ sd_bus *bus,
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+ const char *path,
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+ const char *interface,
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+ const char *property,
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+ sd_bus_message *reply,
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+ void *userdata,
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+ sd_bus_error *error) {
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+
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+ ConfidentialVirtualization v;
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+
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+ assert(bus);
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+ assert(reply);
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+
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+ v = detect_confidential_virtualization();
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+
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+ return sd_bus_message_append(
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+ reply, "s",
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+ v <= 0 ? NULL : confidential_virtualization_to_string(v));
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+}
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+
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static int property_get_tainted(
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sd_bus *bus,
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const char *path,
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@@ -2785,6 +2807,7 @@ const sd_bus_vtable bus_manager_vtable[] = {
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SD_BUS_PROPERTY("Version", "s", property_get_version, 0, SD_BUS_VTABLE_PROPERTY_CONST),
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SD_BUS_PROPERTY("Features", "s", property_get_features, 0, SD_BUS_VTABLE_PROPERTY_CONST),
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SD_BUS_PROPERTY("Virtualization", "s", property_get_virtualization, 0, SD_BUS_VTABLE_PROPERTY_CONST),
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+ SD_BUS_PROPERTY("ConfidentialVirtualization", "s", property_get_confidential_virtualization, 0, SD_BUS_VTABLE_PROPERTY_CONST),
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SD_BUS_PROPERTY("Architecture", "s", property_get_architecture, 0, SD_BUS_VTABLE_PROPERTY_CONST),
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SD_BUS_PROPERTY("Tainted", "s", property_get_tainted, 0, SD_BUS_VTABLE_PROPERTY_CONST),
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BUS_PROPERTY_DUAL_TIMESTAMP("FirmwareTimestamp", offsetof(Manager, timestamps[MANAGER_TIMESTAMP_FIRMWARE]), SD_BUS_VTABLE_PROPERTY_CONST),
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