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[Qemu-devel] [PATCH 01/20] hyper-v: introduce Hyper-V support infrastruc
From: |
Marcelo Tosatti |
Subject: |
[Qemu-devel] [PATCH 01/20] hyper-v: introduce Hyper-V support infrastructure. |
Date: |
Fri, 20 Jan 2012 15:26:27 -0200 |
From: Vadim Rozenfeld <address@hidden>
[Jan: fix build with CONFIG_USER_ONLY]
Signed-off-by: Marcelo Tosatti <address@hidden>
---
Makefile.target | 2 +
target-i386/cpuid.c | 14 +++++++++++
target-i386/hyperv.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++
target-i386/hyperv.h | 43 +++++++++++++++++++++++++++++++++
4 files changed, 123 insertions(+), 0 deletions(-)
create mode 100644 target-i386/hyperv.c
create mode 100644 target-i386/hyperv.h
diff --git a/Makefile.target b/Makefile.target
index 06d79b8..798dd30 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -199,6 +199,8 @@ obj-$(CONFIG_NO_KVM) += kvm-stub.o
obj-y += memory.o savevm.o
LIBS+=-lz
+obj-i386-y +=hyperv.o
+
QEMU_CFLAGS += $(VNC_TLS_CFLAGS)
QEMU_CFLAGS += $(VNC_SASL_CFLAGS)
QEMU_CFLAGS += $(VNC_JPEG_CFLAGS)
diff --git a/target-i386/cpuid.c b/target-i386/cpuid.c
index 91a104b..b9bfeaf 100644
--- a/target-i386/cpuid.c
+++ b/target-i386/cpuid.c
@@ -27,6 +27,8 @@
#include "qemu-option.h"
#include "qemu-config.h"
+#include "hyperv.h"
+
/* feature flags taken from "Intel Processor Identification and the CPUID
* Instruction" and AMD's "CPUID Specification". In cases of disagreement
* between feature naming conventions, aliases may be added.
@@ -716,6 +718,14 @@ static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def,
const char *cpu_model)
goto error;
}
x86_cpu_def->tsc_khz = tsc_freq / 1000;
+ } else if (!strcmp(featurestr, "hv_spinlocks")) {
+ char *err;
+ numvalue = strtoul(val, &err, 0);
+ if (!*val || *err) {
+ fprintf(stderr, "bad numerical value %s\n", val);
+ goto error;
+ }
+ hyperv_set_spinlock_retries(numvalue);
} else {
fprintf(stderr, "unrecognized feature %s\n", featurestr);
goto error;
@@ -724,6 +734,10 @@ static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def,
const char *cpu_model)
check_cpuid = 1;
} else if (!strcmp(featurestr, "enforce")) {
check_cpuid = enforce_cpuid = 1;
+ } else if (!strcmp(featurestr, "hv_relaxed")) {
+ hyperv_enable_relaxed_timing(true);
+ } else if (!strcmp(featurestr, "hv_vapic")) {
+ hyperv_enable_vapic_recommended(true);
} else {
fprintf(stderr, "feature string `%s' not in format
(+feature|-feature|feature=xyz)\n", featurestr);
goto error;
diff --git a/target-i386/hyperv.c b/target-i386/hyperv.c
new file mode 100644
index 0000000..f284e99
--- /dev/null
+++ b/target-i386/hyperv.c
@@ -0,0 +1,64 @@
+/*
+ * QEMU Hyper-V support
+ *
+ * Copyright Red Hat, Inc. 2011
+ *
+ * Author: Vadim Rozenfeld <address@hidden>
+ *
+ * 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 "hyperv.h"
+
+static bool hyperv_vapic;
+static bool hyperv_relaxed_timing;
+static int hyperv_spinlock_attempts = HYPERV_SPINLOCK_NEVER_RETRY;
+
+void hyperv_enable_vapic_recommended(bool val)
+{
+ hyperv_vapic = val;
+}
+
+void hyperv_enable_relaxed_timing(bool val)
+{
+ hyperv_relaxed_timing = val;
+}
+
+void hyperv_set_spinlock_retries(int val)
+{
+ hyperv_spinlock_attempts = val;
+ if (hyperv_spinlock_attempts < 0xFFF) {
+ hyperv_spinlock_attempts = 0xFFF;
+ }
+}
+
+bool hyperv_enabled(void)
+{
+ return hyperv_hypercall_available() || hyperv_relaxed_timing_enabled();
+}
+
+bool hyperv_hypercall_available(void)
+{
+ if (hyperv_vapic ||
+ (hyperv_spinlock_attempts != HYPERV_SPINLOCK_NEVER_RETRY)) {
+ return true;
+ }
+ return false;
+}
+
+bool hyperv_vapic_recommended(void)
+{
+ return hyperv_vapic;
+}
+
+bool hyperv_relaxed_timing_enabled(void)
+{
+ return hyperv_relaxed_timing;
+}
+
+int hyperv_get_spinlock_retries(void)
+{
+ return hyperv_spinlock_attempts;
+}
diff --git a/target-i386/hyperv.h b/target-i386/hyperv.h
new file mode 100644
index 0000000..15467bf
--- /dev/null
+++ b/target-i386/hyperv.h
@@ -0,0 +1,43 @@
+/*
+ * QEMU Hyper-V support
+ *
+ * Copyright Red Hat, Inc. 2011
+ *
+ * Author: Vadim Rozenfeld <address@hidden>
+ *
+ * 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_HW_HYPERV_H
+#define QEMU_HW_HYPERV_H 1
+
+#include "qemu-common.h"
+#include <asm/hyperv.h>
+
+#ifndef HYPERV_SPINLOCK_NEVER_RETRY
+#define HYPERV_SPINLOCK_NEVER_RETRY 0xFFFFFFFF
+#endif
+
+#ifndef KVM_CPUID_SIGNATURE_NEXT
+#define KVM_CPUID_SIGNATURE_NEXT 0x40000100
+#endif
+
+#ifndef CONFIG_USER_ONLY
+void hyperv_enable_vapic_recommended(bool val);
+void hyperv_enable_relaxed_timing(bool val);
+void hyperv_set_spinlock_retries(int val);
+#else
+static inline void hyperv_enable_vapic_recommended(bool val) { }
+static inline void hyperv_enable_relaxed_timing(bool val) { }
+static inline void hyperv_set_spinlock_retries(int val) { }
+#endif
+
+bool hyperv_enabled(void);
+bool hyperv_hypercall_available(void);
+bool hyperv_vapic_recommended(void);
+bool hyperv_relaxed_timing_enabled(void);
+int hyperv_get_spinlock_retries(void);
+
+#endif /* QEMU_HW_HYPERV_H */
--
1.7.6.4
- [Qemu-devel] [PATCH 14/20] memory: Introduce memory_region_init_reservation, (continued)
- [Qemu-devel] [PATCH 14/20] memory: Introduce memory_region_init_reservation, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 10/20] i8259: Completely privatize PicState, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 09/20] apic: Open-code timer save/restore, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 07/20] apic: Introduce apic_report_irq_delivered, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 04/20] kvm: Move kvmclock into hw/kvm folder, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 12/20] ioapic: Drop post-load irr initialization, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 20/20] kvm: Activate in-kernel irqchip support, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 06/20] apic: Inject external NMI events via LINT1, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 03/20] msi: Generalize msix_supported to msi_supported, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 17/20] kvm: x86: Add user space part for in-kernel APIC, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 01/20] hyper-v: introduce Hyper-V support infrastructure.,
Marcelo Tosatti <=
- [Qemu-devel] [PATCH 08/20] apic: Factor out base class for KVM reuse, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 11/20] i8259: Factor out base class for KVM reuse, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 19/20] kvm: x86: Add user space part for in-kernel IOAPIC, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 18/20] kvm: x86: Add user space part for in-kernel i8259, Marcelo Tosatti, 2012/01/20
- [Qemu-devel] [PATCH 13/20] ioapic: Factor out base class for KVM reuse, Marcelo Tosatti, 2012/01/20
- Re: [Qemu-devel] [PATCH 00/20] [PULL] qemu-kvm.git uq/master queue, Anthony Liguori, 2012/01/23