File 0047-kvm-add-memory-encryption-context.patch of Package qemu.20395
From: Brijesh Singh <brijesh.singh@amd.com>
Date: Thu, 8 Mar 2018 06:48:44 -0600
Subject: kvm: add memory encryption context
Split from a patch by Brijesh Singh (brijesh.singh@amd.com).
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
(cherry picked from commit b20e37801fc4a94ba40737541710c29c923e1c48)
[BR: FATE#322124]
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
accel/Makefile.objs | 2 +-
accel/kvm/Makefile.objs | 3 ++-
accel/kvm/kvm-all.c | 25 +++++++++++++++++++++++++
accel/kvm/sev-stub.c | 21 +++++++++++++++++++++
accel/stubs/kvm-stub.c | 5 +++++
include/sysemu/kvm.h | 9 +++++++++
include/sysemu/sev.h | 20 ++++++++++++++++++++
7 files changed, 83 insertions(+), 2 deletions(-)
diff --git a/accel/Makefile.objs b/accel/Makefile.objs
index 10666eda714002bc98519b5a12d0..c3718a10c5d0c469b507f5c9ca88 100644
--- a/accel/Makefile.objs
+++ b/accel/Makefile.objs
@@ -1,4 +1,4 @@
obj-$(CONFIG_SOFTMMU) += accel.o
-obj-y += kvm/
+obj-$(CONFIG_KVM) += kvm/
obj-$(CONFIG_TCG) += tcg/
obj-y += stubs/
diff --git a/accel/kvm/Makefile.objs b/accel/kvm/Makefile.objs
index 85351e7de7e86cb433192eb587f5..fdfa48157877e7867e89ecabedc7 100644
--- a/accel/kvm/Makefile.objs
+++ b/accel/kvm/Makefile.objs
@@ -1 +1,2 @@
-obj-$(CONFIG_KVM) += kvm-all.o
+obj-y += kvm-all.o
+obj-$(call lnot,$(CONFIG_SEV)) += sev-stub.o
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index f290f487a573adc8632165a3d8ce..7559ce28acf678cbfc9cfefd9e90 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -38,6 +38,7 @@
#include "qemu/event_notifier.h"
#include "trace.h"
#include "hw/irq.h"
+#include "sysemu/sev.h"
#include "hw/boards.h"
@@ -103,6 +104,9 @@ struct KVMState
#endif
KVMMemoryListener memory_listener;
QLIST_HEAD(, KVMParkedVcpu) kvm_parked_vcpus;
+
+ /* memory encryption */
+ void *memcrypt_handle;
};
KVMState *kvm_state;
@@ -138,6 +142,15 @@ int kvm_get_max_memslots(void)
return s->nr_slots;
}
+bool kvm_memcrypt_enabled(void)
+{
+ if (kvm_state && kvm_state->memcrypt_handle) {
+ return true;
+ }
+
+ return false;
+}
+
static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml)
{
KVMState *s = kvm_state;
@@ -1632,6 +1645,18 @@ static int kvm_init(MachineState *ms)
kvm_state = s;
+ /*
+ * if memory encryption object is specified then initialize the memory
+ * encryption context.
+ */
+ if (ms->memory_encryption) {
+ kvm_state->memcrypt_handle = sev_guest_init(ms->memory_encryption);
+ if (!kvm_state->memcrypt_handle) {
+ ret = -1;
+ goto err;
+ }
+ }
+
ret = kvm_arch_init(ms, s);
if (ret < 0) {
goto err;
diff --git a/accel/kvm/sev-stub.c b/accel/kvm/sev-stub.c
new file mode 100644
index 0000000000000000000000000000000000000000..4a5cc5569e5f6bbb284a6bd6216f6475b5896096
--- /dev/null
+++ b/accel/kvm/sev-stub.c
@@ -0,0 +1,21 @@
+/*
+ * QEMU SEV stub
+ *
+ * Copyright Advanced Micro Devices 2018
+ *
+ * Authors:
+ * Brijesh Singh <brijesh.singh@amd.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "sysemu/sev.h"
+
+void *sev_guest_init(const char *id)
+{
+ return NULL;
+}
diff --git a/accel/stubs/kvm-stub.c b/accel/stubs/kvm-stub.c
index c964af3e1c97396dd5977cde94a3..f83192d6f63eeed44143efbed54b 100644
--- a/accel/stubs/kvm-stub.c
+++ b/accel/stubs/kvm-stub.c
@@ -105,6 +105,11 @@ int kvm_on_sigbus(int code, void *addr)
return 1;
}
+bool kvm_memcrypt_enabled(void)
+{
+ return false;
+}
+
#ifndef CONFIG_USER_ONLY
int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
{
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index bbf12a17233946880473fbd7b224..bfb472b40557f9905eec085d55eb 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -231,6 +231,15 @@ int kvm_destroy_vcpu(CPUState *cpu);
*/
bool kvm_arm_supports_user_irq(void);
+/**
+ * kvm_memcrypt_enabled - return boolean indicating whether memory encryption
+ * is enabled
+ * Returns: 1 memory encryption is enabled
+ * 0 memory encryption is disabled
+ */
+bool kvm_memcrypt_enabled(void);
+
+
#ifdef NEED_CPU_H
#include "cpu.h"
diff --git a/include/sysemu/sev.h b/include/sysemu/sev.h
new file mode 100644
index 0000000000000000000000000000000000000000..f7a6057d4908a2ae7272c0195f5c6ae439deba69
--- /dev/null
+++ b/include/sysemu/sev.h
@@ -0,0 +1,20 @@
+/*
+ * QEMU Secure Encrypted Virutualization (SEV) support
+ *
+ * Copyright: Advanced Micro Devices, 2016-2018
+ *
+ * Authors:
+ * Brijesh Singh <brijesh.singh@amd.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef QEMU_SEV_H
+#define QEMU_SEV_H
+
+#include "sysemu/kvm.h"
+
+void *sev_guest_init(const char *id);
+#endif
