search for: kvm_hypercall3

...- unsigned long p2) +static __always_inline long kvm_hypercall2(unsigned int nr, unsigned long p1, + unsigned long p2) { long ret; asm volatile(KVM_HYPERCALL @@ -61,8 +61,8 @@ static inline long kvm_hypercall2(unsigned int nr, unsigned long p1, return ret; } -static inline long kvm_hypercall3(unsigned int nr, unsigned long p1, - unsigned long p2, unsigned long p3) +static __always_inline long kvm_hypercall3(unsigned int nr, unsigned long p1, + unsigned long p2, unsigned long p3) { long ret; asm volatile(KVM_HYPERCALL @@ -72,9 +72,9 @@ static inline long kvm_hypercall3(u...

...void lguest_load_gdt(const struct desc_ptr *desc) { - BUG_ON((desc->size + 1) / 8 != GDT_ENTRIES); - kvm_hypercall2(LHCALL_LOAD_GDT, __pa(desc->address), GDT_ENTRIES); + unsigned int i; + struct desc_struct *gdt = (void *)desc->address; + + for (i = 0; i < (desc->size+1)/8; i++) + kvm_hypercall3(LHCALL_LOAD_GDT_ENTRY, i, gdt[i].a, gdt[i].b); } /* For a single GDT entry which changes, we do the lazy thing: alter our GDT, @@ -291,7 +291,9 @@ static void lguest_write_gdt_entry(struct desc_struct *dt, int entrynum, const void *desc, int type) { native_write_gdt_entry(dt, entrynu...

...void lguest_load_gdt(const struct desc_ptr *desc) { - BUG_ON((desc->size + 1) / 8 != GDT_ENTRIES); - kvm_hypercall2(LHCALL_LOAD_GDT, __pa(desc->address), GDT_ENTRIES); + unsigned int i; + struct desc_struct *gdt = (void *)desc->address; + + for (i = 0; i < (desc->size+1)/8; i++) + kvm_hypercall3(LHCALL_LOAD_GDT_ENTRY, i, gdt[i].a, gdt[i].b); } /* For a single GDT entry which changes, we do the lazy thing: alter our GDT, @@ -291,7 +291,9 @@ static void lguest_write_gdt_entry(struct desc_struct *dt, int entrynum, const void *desc, int type) { native_write_gdt_entry(dt, entrynu...

...*vq, u32 data) > { > struct virtio_ccw_vq_info *info = vq->priv; > struct virtio_ccw_device *vcdev; > @@ -402,12 +402,22 @@ static bool virtio_ccw_kvm_notify(struct virtqueue *vq) > BUILD_BUG_ON(sizeof(struct subchannel_id) != sizeof(unsigned int)); > info->cookie = kvm_hypercall3(KVM_S390_VIRTIO_CCW_NOTIFY, > *((unsigned int *)&schid), > - vq->index, info->cookie); > + data, info->cookie); > if (info->cookie < 0) > return false; > return true; > } > > +static bool virtio_ccw_kvm_notify(struct...

On Tue, Mar 21, 2023 at 12:00:42PM +0300, Viktor Prutyanov wrote: > On Tue, Mar 21, 2023 at 5:29?AM Jason Wang <jasowang at redhat.com> wrote: > > > > On Tue, Mar 21, 2023 at 7:21?AM Viktor Prutyanov <viktor at daynix.com> wrote: > > > > > > According to VirtIO spec v1.2, VIRTIO_F_NOTIFICATION_DATA feature > > > indicates that the driver passes

...nfo *info = vq->priv; > > > struct virtio_ccw_device *vcdev; > > > @@ -402,12 +402,22 @@ static bool virtio_ccw_kvm_notify(struct virtqueue *vq) > > > BUILD_BUG_ON(sizeof(struct subchannel_id) != sizeof(unsigned int)); > > > info->cookie = kvm_hypercall3(KVM_S390_VIRTIO_CCW_NOTIFY, > > > *((unsigned int *)&schid), > > > - vq->index, info->cookie); > > > + data, info->cookie); > > > if (info-&...

On Wed, Aug 05, 2020 at 03:59:40PM +0200, Marco Elver wrote: > On Wed, Aug 05, 2020 at 03:42PM +0200, peterz at infradead.org wrote: > > Shouldn't we __always_inline those? They're going to be really small. > > I can send a v2, and you can choose. For reference, though: > > ffffffff86271ee0 <arch_local_save_flags>: > ffffffff86271ee0: 0f 1f 44 00 00

On Wed, Aug 05, 2020 at 03:59:40PM +0200, Marco Elver wrote: > On Wed, Aug 05, 2020 at 03:42PM +0200, peterz at infradead.org wrote: > > Shouldn't we __always_inline those? They're going to be really small. > > I can send a v2, and you can choose. For reference, though: > > ffffffff86271ee0 <arch_local_save_flags>: > ffffffff86271ee0: 0f 1f 44 00 00

..., VIRTIO_F_NOTIFICATION_DATA) ? > + vring_notification_data(vq) : vq->index; > > vcdev = to_vc_device(info->vq->vdev); > ccw_device_get_schid(vcdev->cdev, &schid); > BUILD_BUG_ON(sizeof(struct subchannel_id) != sizeof(unsigned int)); > info->cookie = kvm_hypercall3(KVM_S390_VIRTIO_CCW_NOTIFY, > *((unsigned int *)&schid), > - vq->index, info->cookie); > + data, info->cookie); > if (info->cookie < 0) > return false; > return true; > diff --git a/drivers/virtio/virtio_mmio.c b/drivers/vi...

...*vq, u32 data) > { > struct virtio_ccw_vq_info *info = vq->priv; > struct virtio_ccw_device *vcdev; > @@ -402,12 +402,22 @@ static bool virtio_ccw_kvm_notify(struct virtqueue *vq) > BUILD_BUG_ON(sizeof(struct subchannel_id) != sizeof(unsigned int)); > info->cookie = kvm_hypercall3(KVM_S390_VIRTIO_CCW_NOTIFY, > *((unsigned int *)&schid), > - vq->index, info->cookie); > + data, info->cookie); > if (info->cookie < 0) > return false; > return true; > } > > +static bool virtio_ccw_kvm_notify(struct...

...*vq, u32 data) > { > struct virtio_ccw_vq_info *info = vq->priv; > struct virtio_ccw_device *vcdev; > @@ -402,12 +402,22 @@ static bool virtio_ccw_kvm_notify(struct virtqueue *vq) > BUILD_BUG_ON(sizeof(struct subchannel_id) != sizeof(unsigned int)); > info->cookie = kvm_hypercall3(KVM_S390_VIRTIO_CCW_NOTIFY, > *((unsigned int *)&schid), > - vq->index, info->cookie); > + data, info->cookie); > if (info->cookie < 0) > return false; > return true; > } > > +static bool virtio_ccw_kvm_notify(stru...

...sm("3") = p2; + register long __rc asm("2"); + + asm volatile ("diag 2,4,0x500\n" + : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2) + : "memory", "cc"); + return __rc; +} + +static inline long kvm_hypercall3(unsigned long nr, unsigned long p1, + unsigned long p2, unsigned long p3) +{ + register unsigned long __nr asm("1") = nr; + register unsigned long __p1 asm("2") = p1; + register unsigned long __p2 asm("3") = p2; + register unsigned long __p3 asm("4")...

...sm("3") = p2; + register long __rc asm("2"); + + asm volatile ("diag 2,4,0x500\n" + : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2) + : "memory", "cc"); + return __rc; +} + +static inline long kvm_hypercall3(unsigned long nr, unsigned long p1, + unsigned long p2, unsigned long p3) +{ + register unsigned long __nr asm("1") = nr; + register unsigned long __p1 asm("2") = p1; + register unsigned long __p2 asm("3") = p2; + register unsigned long __p3 asm("4")...

Hi, This is a proof of concept of GPU forwarding for Linux guest on Linux host. I'd like to get comments and suggestions from community before I put more time on it. To summarize what it is: 1. It's a solution to bring GPU acceleration for Linux vm guest on Linux host. It could works with different GPU although the current proof of concept only works with Intel GPU. 2. The basic idea

This patch series introduces a backend for kvm to run on IBM System z machines that uses the mainframe's sie virtualization capability. This work runs 64bit guests on z800/z890/z900/z990/z9/z10 class machines with a 64bit linux host. Userspace will follow once we're done brushing it over. The patch queue consists of the following patches, which can be applied in sequence on top of kvm.git

This patch series introduces a backend for kvm to run on IBM System z machines that uses the mainframe's sie virtualization capability. This work runs 64bit guests on z800/z890/z900/z990/z9/z10 class machines with a 64bit linux host. Userspace will follow once we're done brushing it over. The patch queue consists of the following patches, which can be applied in sequence on top of kvm.git

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VM-s (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VM-s (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place