diff mbox series

[PULL,36/48] i386: add hyperv-stub for CONFIG_HYPERV=n

Message ID 1539894735-14232-37-git-send-email-pbonzini@redhat.com
State New
Headers show
Series [PULL,01/48] es1370: more fixes for ADC_FRAMEADR and ADC_FRAMECNT | expand

Commit Message

Paolo Bonzini Oct. 18, 2018, 8:32 p.m. UTC 
From: Roman Kagan <rkagan@virtuozzo.com>

This will allow to build slightly leaner QEMU that supports some HyperV
features of KVM (e.g. SynIC timers, PV spinlocks, APIC assists, etc.)
but nothing else on the QEMU side.

Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Message-Id: <20180921082041.29380-6-rkagan@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/Makefile.objs | 17 ++++++++++-------
 target/i386/hyperv-stub.c | 35 +++++++++++++++++++++++++++++++++++
 target/i386/hyperv.h      |  2 ++
 3 files changed, 47 insertions(+), 7 deletions(-)
 create mode 100644 target/i386/hyperv-stub.c
diff mbox series

Patch

diff --git a/target/i386/Makefile.objs b/target/i386/Makefile.objs
index 04678f5..32bf966 100644
--- a/target/i386/Makefile.objs
+++ b/target/i386/Makefile.objs
@@ -3,17 +3,20 @@  obj-$(CONFIG_TCG) += translate.o
 obj-$(CONFIG_TCG) += bpt_helper.o cc_helper.o excp_helper.o fpu_helper.o
 obj-$(CONFIG_TCG) += int_helper.o mem_helper.o misc_helper.o mpx_helper.o
 obj-$(CONFIG_TCG) += seg_helper.o smm_helper.o svm_helper.o
-obj-$(CONFIG_SOFTMMU) += machine.o arch_memory_mapping.o arch_dump.o monitor.o
-obj-$(CONFIG_KVM) += kvm.o hyperv.o
-obj-$(CONFIG_SEV) += sev.o
+ifeq ($(CONFIG_SOFTMMU),y)
+obj-y += machine.o arch_memory_mapping.o arch_dump.o monitor.o
+obj-$(CONFIG_KVM) += kvm.o
 obj-$(call lnot,$(CONFIG_KVM)) += kvm-stub.o
-obj-$(call lnot,$(CONFIG_SEV)) += sev-stub.o
-# HAX support
-ifdef CONFIG_WIN32
+obj-$(CONFIG_HYPERV) += hyperv.o
+obj-$(call lnot,$(CONFIG_HYPERV)) += hyperv-stub.o
+ifeq ($(CONFIG_WIN32),y)
 obj-$(CONFIG_HAX) += hax-all.o hax-mem.o hax-windows.o
 endif
-ifdef CONFIG_DARWIN
+ifeq ($(CONFIG_DARWIN),y)
 obj-$(CONFIG_HAX) += hax-all.o hax-mem.o hax-darwin.o
 obj-$(CONFIG_HVF) += hvf/
 endif
 obj-$(CONFIG_WHPX) += whpx-all.o
+endif
+obj-$(CONFIG_SEV) += sev.o
+obj-$(call lnot,$(CONFIG_SEV)) += sev-stub.o
diff --git a/target/i386/hyperv-stub.c b/target/i386/hyperv-stub.c
new file mode 100644
index 0000000..5919ba8
--- /dev/null
+++ b/target/i386/hyperv-stub.c
@@ -0,0 +1,35 @@ 
+/*
+ * Stubs for CONFIG_HYPERV=n
+ *
+ * Copyright (c) 2015-2018 Virtuozzo International GmbH.
+ *
+ * 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 "hyperv.h"
+
+#ifdef CONFIG_KVM
+int kvm_hv_handle_exit(X86CPU *cpu, struct kvm_hyperv_exit *exit)
+{
+    switch (exit->type) {
+    case KVM_EXIT_HYPERV_SYNIC:
+        if (!cpu->hyperv_synic) {
+            return -1;
+        }
+
+        /*
+         * Tracking the changes in the MSRs is unnecessary as there are no
+         * users for them beside save/load, which is handled nicely by the
+         * generic MSR save/load code
+         */
+        return 0;
+    case KVM_EXIT_HYPERV_HCALL:
+        exit->u.hcall.result = HV_STATUS_INVALID_HYPERCALL_CODE;
+        return 0;
+    default:
+        return -1;
+    }
+}
+#endif
diff --git a/target/i386/hyperv.h b/target/i386/hyperv.h
index 5c49251..f0a27c3 100644
--- a/target/i386/hyperv.h
+++ b/target/i386/hyperv.h
@@ -18,6 +18,8 @@ 
 #include "sysemu/kvm.h"
 #include "hw/hyperv/hyperv.h"
 
+#ifdef CONFIG_KVM
 int kvm_hv_handle_exit(X86CPU *cpu, struct kvm_hyperv_exit *exit);
+#endif
 
 #endif