On 2011-10-17 11:17, Vadim Rozenfeld wrote: > with the following series of patches we are starting to implement > some basic Microsoft Hyper-V Enlightenment functionality, like relaxed > timing, spinlock, and virtual apic support. > > For more Hyper-V related information please see: > "Hypervisor Functional Specification v2.0: For Windows Server 2008 R2" at > http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=18673 > --- > Makefile.target | 2 + > default-configs/i386-softmmu.mak | 1 + > default-configs/x86_64-softmmu.mak | 1 + > target-i386/cpuid.c | 14 +++++++ > target-i386/hyperv.c | 69 ++++++++++++++++++++++++++++++++++++ > target-i386/hyperv.h | 30 +++++++++++++++ > 6 files changed, 117 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 40cc592..2c8e1b8 100644 > --- a/Makefile.target > +++ b/Makefile.target > @@ -202,6 +202,8 @@ obj-$(CONFIG_NO_KVM) += kvm-stub.o > obj-y += memory.o > LIBS+=-lz > > +obj-$(CONFIG_HYPERV) += hyperv.o obj-i386-y > + > QEMU_CFLAGS += $(VNC_TLS_CFLAGS) > QEMU_CFLAGS += $(VNC_SASL_CFLAGS) > QEMU_CFLAGS += $(VNC_JPEG_CFLAGS) > diff --git a/default-configs/i386-softmmu.mak b/default-configs/i386-softmmu.mak > index 55589fa..ee69a0a 100644 > --- a/default-configs/i386-softmmu.mak > +++ b/default-configs/i386-softmmu.mak > @@ -21,3 +21,4 @@ CONFIG_PIIX_PCI=y > CONFIG_SOUND=y > CONFIG_HPET=y > CONFIG_APPLESMC=y > +CONFIG_HYPERV=y > diff --git a/default-configs/x86_64-softmmu.mak b/default-configs/x86_64-softmmu.mak > index 8895028..35b1c00 100644 > --- a/default-configs/x86_64-softmmu.mak > +++ b/default-configs/x86_64-softmmu.mak > @@ -21,3 +21,4 @@ CONFIG_PIIX_PCI=y > CONFIG_SOUND=y > CONFIG_HPET=y > CONFIG_APPLESMC=y > +CONFIG_HYPERV=y Useless config options (that do not work anyway as Kevin noted). > diff --git a/target-i386/cpuid.c b/target-i386/cpuid.c > index 1e8bcff..50b2d0e 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_set_relaxed_timing(1); > + } else if (!strcmp(featurestr, "hv_vapic")) { > + hyperv_set_vapic_recommended(1); > } 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..bed859e > --- /dev/null > +++ b/target-i386/hyperv.c > @@ -0,0 +1,69 @@ > +/* > + * QEMU Hyper-V support > + * > + * Copyright Red Hat, Inc. 2011 > + * > + * Author: Vadim Rozenfeld <vrozenfe@xxxxxxxxxx> > + * > + * 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 int hyperv_vapic; > +static int hyperv_relaxed_timing; > +static int hyperv_spinlock_attempts = HYPERV_SPINLOCK_NEVER_RETRY; > + > +void hyperv_set_vapic_recommended(int val) > +{ > + hyperv_vapic = val; > +} > + > +void hyperv_set_relaxed_timing(int 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; > + } > +} hyperv_enabled_x(bool enable) would be nicer. > + > +int hyperv_enabled(void) > +{ > + return hyperv_hypercall_available() || hyperv_get_relaxed_timing(); > +} > + > +int hyperv_hypercall_available(void) > +{ > + if (hyperv_vapic || > + (hyperv_spinlock_attempts != HYPERV_SPINLOCK_NEVER_RETRY)) { > + return 1; > + } > + return 0; > +} > + > +int hyperv_get_vapic_recommended(void) > +{ > +#ifdef KVM_CAP_IRQCHIP This is x86-only code, and x86 supports KVM_CAP_IRQCHIP. So drop this #ifdef. > + return hyperv_vapic; > +#else > + return 0; > +#endif > +} > + > +int hyperv_get_relaxed_timing(void) > +{ > + return hyperv_relaxed_timing; > +} > + > +int hyperv_get_spinlock_retries(void) > +{ > + return hyperv_spinlock_attempts; > +} bool hyperv_vapic_recommend(void), hyperv_relaxed_timing_enabled etc. "get" implies to me that there is actual a non-boolean value returned which is not. > + > diff --git a/target-i386/hyperv.h b/target-i386/hyperv.h > new file mode 100644 > index 0000000..1ea5e99 > --- /dev/null > +++ b/target-i386/hyperv.h > @@ -0,0 +1,30 @@ > +/* > + * QEMU Hyper-V support > + * > + * Copyright Red Hat, Inc. 2011 > + * > + * Author: Vadim Rozenfeld <vrozenfe@xxxxxxxxxx> > + * > + * 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 <asm/hyperv.h> > + > +#define HYPERV_SPINLOCK_NEVER_RETRY 0xFFFFFFFF > + > +void hyperv_set_vapic_recommended(int val); > +void hyperv_set_relaxed_timing(int val); > +void hyperv_set_spinlock_retries(int val); > + > +int hyperv_enabled(void); > +int hyperv_hypercall_available(void); > +int hyperv_get_vapic_recommended(void); > +int hyperv_get_relaxed_timing(void); > +int hyperv_get_spinlock_retries(void); > + > +#endif /* QEMU_HW_HYPERV_H */ Looks good otherwise. Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
