search for: guest_map

...5678..9476c616d064 100644 --- a/tools/virtio/vringh_test.c +++ b/tools/virtio/vringh_test.c @@ -314,7 +314,8 @@ static int parallel_test(u64 features, err(1, "Could not set affinity to cpu %u", first_cpu); vq = vring_new_virtqueue(0, RINGSIZE, ALIGN, &gvdev.vdev, true, - guest_map, fast_vringh ? no_notify_host + false, guest_map, + fast_vringh ? no_notify_host : parallel_notify_host, never_callback_guest, "guest vq"); @@ -479,7 +480,7 @@ int main(int argc, char *argv[]) memset(__user_addr_min, 0, vring_size(RINGSIZE, ALIGN)); /* Set...

...5678..9476c616d064 100644 --- a/tools/virtio/vringh_test.c +++ b/tools/virtio/vringh_test.c @@ -314,7 +314,8 @@ static int parallel_test(u64 features, err(1, "Could not set affinity to cpu %u", first_cpu); vq = vring_new_virtqueue(0, RINGSIZE, ALIGN, &gvdev.vdev, true, - guest_map, fast_vringh ? no_notify_host + false, guest_map, + fast_vringh ? no_notify_host : parallel_notify_host, never_callback_guest, "guest vq"); @@ -479,7 +480,7 @@ int main(int argc, char *argv[]) memset(__user_addr_min, 0, vring_size(RINGSIZE, ALIGN)); /* Set...

...ser(&vrh, features, RINGSIZE, true, vrh.vring.desc, vrh.vring.avail, vrh.vring.used); CPU_SET(first_cpu, &cpu_set); @@ -297,7 +297,7 @@ static int parallel_test(u64 features, unsigned int finished = 0; /* We pass sg[]s pointing into here, but we need RINGSIZE+1 */ - data = guest_map + vring_size(RINGSIZE, ALIGN); + data = guest_map + vring_legacy_size(RINGSIZE, ALIGN); indirects = (void *)data + (RINGSIZE + 1) * 2 * sizeof(int); /* We are the guest. */ @@ -478,7 +478,7 @@ int main(int argc, char *argv[]) if (posix_memalign(&__user_addr_min, PAGE_SIZE, USER_MEM)...

...ser(&vrh, features, RINGSIZE, true, vrh.vring.desc, vrh.vring.avail, vrh.vring.used); CPU_SET(first_cpu, &cpu_set); @@ -297,7 +297,7 @@ static int parallel_test(u64 features, unsigned int finished = 0; /* We pass sg[]s pointing into here, but we need RINGSIZE+1 */ - data = guest_map + vring_size(RINGSIZE, ALIGN); + data = guest_map + vring_legacy_size(RINGSIZE, ALIGN); indirects = (void *)data + (RINGSIZE + 1) * 2 * sizeof(int); /* We are the guest. */ @@ -478,7 +478,7 @@ int main(int argc, char *argv[]) if (posix_memalign(&__user_addr_min, PAGE_SIZE, USER_MEM)...

...ser(&vrh, features, RINGSIZE, true, vrh.vring.desc, vrh.vring.avail, vrh.vring.used); CPU_SET(first_cpu, &cpu_set); @@ -297,7 +297,7 @@ static int parallel_test(u64 features, unsigned int finished = 0; /* We pass sg[]s pointing into here, but we need RINGSIZE+1 */ - data = guest_map + vring_size(RINGSIZE, ALIGN); + data = guest_map + vring_legacy_size(RINGSIZE, ALIGN); indirects = (void *)data + (RINGSIZE + 1) * 2 * sizeof(int); /* We are the guest. */ @@ -478,7 +478,7 @@ int main(int argc, char *argv[]) if (posix_memalign(&__user_addr_min, PAGE_SIZE, USER_MEM)...

...ser(&vrh, features, RINGSIZE, true, vrh.vring.desc, vrh.vring.avail, vrh.vring.used); CPU_SET(first_cpu, &cpu_set); @@ -297,7 +297,7 @@ static int parallel_test(u64 features, unsigned int finished = 0; /* We pass sg[]s pointing into here, but we need RINGSIZE+1 */ - data = guest_map + vring_size(RINGSIZE, ALIGN); + data = guest_map + vring_legacy_size(RINGSIZE, ALIGN); indirects = (void *)data + (RINGSIZE + 1) * 2 * sizeof(int); /* We are the guest. */ @@ -478,7 +478,7 @@ int main(int argc, char *argv[]) if (posix_memalign(&__user_addr_min, PAGE_SIZE, USER_MEM)...

...ser(&vrh, features, RINGSIZE, true, vrh.vring.desc, vrh.vring.avail, vrh.vring.used); CPU_SET(first_cpu, &cpu_set); @@ -297,7 +297,7 @@ static int parallel_test(u64 features, unsigned int finished = 0; /* We pass sg[]s pointing into here, but we need RINGSIZE+1 */ - data = guest_map + vring_size(RINGSIZE, ALIGN); + data = guest_map + vring_legacy_size(RINGSIZE, ALIGN); indirects = (void *)data + (RINGSIZE + 1) * 2 * sizeof(int); /* We are the guest. */ @@ -478,7 +478,7 @@ int main(int argc, char *argv[]) if (posix_memalign(&__user_addr_min, PAGE_SIZE, USER_MEM)...

...ser(&vrh, features, RINGSIZE, true, vrh.vring.desc, vrh.vring.avail, vrh.vring.used); CPU_SET(first_cpu, &cpu_set); @@ -297,7 +297,7 @@ static int parallel_test(u64 features, unsigned int finished = 0; /* We pass sg[]s pointing into here, but we need RINGSIZE+1 */ - data = guest_map + vring_size(RINGSIZE, ALIGN); + data = guest_map + vring_legacy_size(RINGSIZE, ALIGN); indirects = (void *)data + (RINGSIZE + 1) * 2 * sizeof(int); /* We are the guest. */ @@ -478,7 +478,7 @@ int main(int argc, char *argv[]) if (posix_memalign(&__user_addr_min, PAGE_SIZE, USER_MEM)...

ging_prep ensures that an mfn is backing the paged-out gfn, and transitions to the next state in the paging state machine for this page. Foreign mappings of the gfn will now succeed. This is the key idea, as it allows the pager to now map the gfn and fill in its contents. Unfortunately, it also allows any other foreign mapper to map the gfn and read its contents. This is particularly dangerous

...ser(&vrh, features, RINGSIZE, true, vrh.vring.desc, vrh.vring.avail, vrh.vring.used); CPU_SET(first_cpu, &cpu_set); @@ -297,7 +297,7 @@ static int parallel_test(u64 features, unsigned int finished = 0; /* We pass sg[]s pointing into here, but we need RINGSIZE+1 */ - data = guest_map + vring_size(RINGSIZE, ALIGN); + data = guest_map + vring_legacy_size(RINGSIZE, ALIGN); indirects = (void *)data + (RINGSIZE + 1) * 2 * sizeof(int); /* We are the guest. */ @@ -478,7 +478,7 @@ int main(int argc, char *argv[]) if (posix_memalign(&__user_addr_min, PAGE_SIZE, USER_MEM)...

...ser(&vrh, features, RINGSIZE, true, vrh.vring.desc, vrh.vring.avail, vrh.vring.used); CPU_SET(first_cpu, &cpu_set); @@ -297,7 +297,7 @@ static int parallel_test(u64 features, unsigned int finished = 0; /* We pass sg[]s pointing into here, but we need RINGSIZE+1 */ - data = guest_map + vring_size(RINGSIZE, ALIGN); + data = guest_map + vring_legacy_size(RINGSIZE, ALIGN); indirects = (void *)data + (RINGSIZE + 1) * 2 * sizeof(int); /* We are the guest. */ @@ -478,7 +478,7 @@ int main(int argc, char *argv[]) if (posix_memalign(&__user_addr_min, PAGE_SIZE, USER_MEM)...

...ser(&vrh, features, RINGSIZE, true, vrh.vring.desc, vrh.vring.avail, vrh.vring.used); CPU_SET(first_cpu, &cpu_set); @@ -297,7 +297,7 @@ static int parallel_test(u64 features, unsigned int finished = 0; /* We pass sg[]s pointing into here, but we need RINGSIZE+1 */ - data = guest_map + vring_size(RINGSIZE, ALIGN); + data = guest_map + vring_legacy_size(RINGSIZE, ALIGN); indirects = (void *)data + (RINGSIZE + 1) * 2 * sizeof(int); /* We are the guest. */ @@ -478,7 +478,7 @@ int main(int argc, char *argv[]) if (posix_memalign(&__user_addr_min, PAGE_SIZE, USER_MEM)...

This introduces vringh, which are generic accessors for virtio rings (host side). There's a host-side implementation in vhost, but it assumes that the rings are in userspace, and is tied to the vhost implementation. I have patches to adapt it to use vringh, but I'm pushing this in the next merge window for Sjur, who has CAIF patches which need it. This also includes a test program in

This introduces vringh, which are generic accessors for virtio rings (host side). There's a host-side implementation in vhost, but it assumes that the rings are in userspace, and is tied to the vhost implementation. I have patches to adapt it to use vringh, but I'm pushing this in the next merge window for Sjur, who has CAIF patches which need it. This also includes a test program in

Getting use of virtio rings correct is tricky, and a recent patch saw an implementation of in-kernel rings (as separate from userspace). This patch attempts to abstract the business of dealing with the virtio ring layout from the access (userspace or direct); to do this, we use function pointers, which gcc inlines correctly. Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> ---

Getting use of virtio rings correct is tricky, and a recent patch saw an implementation of in-kernel rings (as separate from userspace). This patch attempts to abstract the business of dealing with the virtio ring layout from the access (userspace or direct); to do this, we use function pointers, which gcc inlines correctly. Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> ---

This fixes virtio on Xen guests as well as on any other platform that uses virtio_pci on which physical addresses don't match bus addresses. This can be tested with: virtme-run --xen xen --kimg arch/x86/boot/bzImage --console using virtme from here: https://git.kernel.org/cgit/utils/kernel/virtme/virtme.git Without these patches, the guest hangs forever. With these patches,

This fixes virtio on Xen guests as well as on any other platform that uses virtio_pci on which physical addresses don't match bus addresses. This can be tested with: virtme-run --xen xen --kimg arch/x86/boot/bzImage --console using virtme from here: https://git.kernel.org/cgit/utils/kernel/virtme/virtme.git Without these patches, the guest hangs forever. With these patches,

This fixes virtio on Xen guests as well as on any other platform that uses virtio_pci on which physical addresses don't match bus addresses. This can be tested with: virtme-run --xen xen --kimg arch/x86/boot/bzImage --console using virtme from here: https://git.kernel.org/cgit/utils/kernel/virtme/virtme.git Without these patches, the guest hangs forever. With these patches,

This fixes virtio on Xen guests as well as on any other platform that uses virtio_pci on which physical addresses don't match bus addresses. This can be tested with: virtme-run --xen xen --kimg arch/x86/boot/bzImage --console using virtme from here: https://git.kernel.org/cgit/utils/kernel/virtme/virtme.git Without these patches, the guest hangs forever. With these patches,