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2025-03-20nvmet: pci-epf: Remove redundant 'flush_workqueue()' callsChen Ni
'destroy_workqueue()' already drains the queue before destroying it, so there is no need to flush it explicitly. Remove the redundant 'flush_workqueue()' calls. This was generated with coccinelle: @@ expression E; @@ - flush_workqueue(E); destroy_workqueue(E); Signed-off-by: Chen Ni <nichen@iscas.ac.cn> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-03-20nvmet-fc: Remove unused functionsWangYuli
The functions nvmet_fc_iodnum() and nvmet_fc_fodnum() are currently unutilized. Following commit c53432030d86 ("nvme-fabrics: Add target support for FC transport"), which introduced these two functions, they have not been used at all in practice. Remove them to resolve the compiler warnings. Fix follow errors with clang-19 when W=1e: drivers/nvme/target/fc.c:177:1: error: unused function 'nvmet_fc_iodnum' [-Werror,-Wunused-function] 177 | nvmet_fc_iodnum(struct nvmet_fc_ls_iod *iodptr) | ^~~~~~~~~~~~~~~ drivers/nvme/target/fc.c:183:1: error: unused function 'nvmet_fc_fodnum' [-Werror,-Wunused-function] 183 | nvmet_fc_fodnum(struct nvmet_fc_fcp_iod *fodptr) | ^~~~~~~~~~~~~~~ 2 errors generated. make[8]: *** [scripts/Makefile.build:207: drivers/nvme/target/fc.o] Error 1 make[7]: *** [scripts/Makefile.build:465: drivers/nvme/target] Error 2 make[6]: *** [scripts/Makefile.build:465: drivers/nvme] Error 2 make[6]: *** Waiting for unfinished jobs.... Fixes: c53432030d86 ("nvme-fabrics: Add target support for FC transport") Signed-off-by: WangYuli <wangyuli@uniontech.com> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-03-20nvme-pci: remove stale commentBaruch Siach
The ns variable has been removed in commit 62451a2b2e7e ("nvme: separate command prep and issue"). Drop reference to ns in comment. Fixes: 62451a2b2e7e ("nvme: separate command prep and issue") Signed-off-by: Baruch Siach <baruch@tkos.co.il> Reviewed-by: Anuj Gupta <anuj20.g@samsung.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-03-20nvme-fc: Utilise min3() to simplify queue count calculationQasim Ijaz
Refactor nvme_fc_create_io_queues() and nvme_fc_recreate_io_queues() to use the min3() macro to find the minimum between 3 values instead of multiple min()'s. This shortens the code and makes it easier to read. Signed-off-by: Qasim Ijaz <qasdev00@gmail.com> Reviewed-by: James Smart <jsmart2021@gmail.com> Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-03-20nvme-multipath: Add visibility for queue-depth io-policyNilay Shroff
This patch helps add nvme native multipath visibility for queue-depth io-policy. It adds a new attribute file named "queue_depth" under namespace device path node which would print the number of active/ in-flight I/O requests currently queued for the given path. For instance, if we have a shared namespace accessible from two different controllers/paths then accessing head block node of the shared namespace would show the following output: $ ls -l /sys/block/nvme1n1/multipath/ nvme1c1n1 -> ../../../../../pci052e:78/052e:78:00.0/nvme/nvme1/nvme1c1n1 nvme1c3n1 -> ../../../../../pci058e:78/058e:78:00.0/nvme/nvme3/nvme1c3n1 In the above example, nvme1n1 is head gendisk node created for a shared namespace and the namespace is accessible from nvme1c1n1 and nvme1c3n1 paths. For queue-depth io-policy we can then refer the "queue_depth" attribute file created under each namespace path: $ cat /sys/block/nvme1n1/multipath/nvme1c1n1/queue_depth 518 $cat /sys/block/nvme1n1/multipath/nvme1c3n1/queue_depth 504 >From the above output, we can infer that I/O workload targeted at nvme1n1 uses two paths nvme1c1n1 and nvme1c3n1 and the current queue depth of each path is 518 and 504 respectively. Reading "queue_depth" file when configured io-policy is anything but queue-depth would show no output. Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Nilay Shroff <nilay@linux.ibm.com> Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-03-20nvme-multipath: Add visibility for numa io-policyNilay Shroff
This patch helps add nvme native multipath visibility for numa io-policy. It adds a new attribute file named "numa_nodes" under namespace gendisk device path node which prints the list of numa nodes preferred by the given namespace path. The numa nodes value is comma delimited list of nodes or A-B range of nodes. For instance, if we have a shared namespace accessible from two different controllers/paths then accessing head node of the shared namespace would show the following output: $ ls -l /sys/block/nvme1n1/multipath/ nvme1c1n1 -> ../../../../../pci052e:78/052e:78:00.0/nvme/nvme1/nvme1c1n1 nvme1c3n1 -> ../../../../../pci058e:78/058e:78:00.0/nvme/nvme3/nvme1c3n1 In the above example, nvme1n1 is head gendisk node created for a shared namespace and this namespace is accessible from nvme1c1n1 and nvme1c3n1 paths. For numa io-policy we can then refer the "numa_nodes" attribute file created under each namespace path: $ cat /sys/block/nvme1n1/multipath/nvme1c1n1/numa_nodes 0-1 $ cat /sys/block/nvme1n1/multipath/nvme1c3n1/numa_nodes 2-3 >From the above output, we infer that I/O workload targeted at nvme1n1 and running on numa nodes 0 and 1 would prefer using path nvme1c1n1. Similarly, I/O workload running on numa nodes 2 and 3 would prefer using path nvme1c3n1. Reading "numa_nodes" file when configured io-policy is anything but numa would show no output. Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Nilay Shroff <nilay@linux.ibm.com> Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-03-20nvme-multipath: Add visibility for round-robin io-policyNilay Shroff
This patch helps add nvme native multipath visibility for round-robin io-policy. It creates a "multipath" sysfs directory under head gendisk device node directory and then from "multipath" directory it adds a link to each namespace path device the head node refers. For instance, if we have a shared namespace accessible from two different controllers/paths then we create a soft link to each path device from head disk node as shown below: $ ls -l /sys/block/nvme1n1/multipath/ nvme1c1n1 -> ../../../../../pci052e:78/052e:78:00.0/nvme/nvme1/nvme1c1n1 nvme1c3n1 -> ../../../../../pci058e:78/058e:78:00.0/nvme/nvme3/nvme1c3n1 In the above example, nvme1n1 is head gendisk node created for a shared namespace and the namespace is accessible from nvme1c1n1 and nvme1c3n1 paths. For round-robin I/O policy, we could easily infer from the above output that I/O workload targeted to nvme1n1 would toggle across paths nvme1c1n1 and nvme1c3n1. Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Nilay Shroff <nilay@linux.ibm.com> Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-03-20nvmet: add tls_concat and tls_key debugfs entriesHannes Reinecke
Add debugfs entries to display the 'concat' and 'tls_key' controller attributes. Signed-off-by: Hannes Reinecke <hare@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-03-20nvmet-tcp: support secure channel concatenationHannes Reinecke
Evaluate the SC_C flag during DH-CHAP-HMAC negotiation to check if secure concatenation as specified in the NVMe Base Specification v2.1, section 8.3.4.3: "Secure Channel Concatenationand" is requested. If requested the generated PSK is inserted into the keyring once negotiation has finished allowing for an encrypted connection once the admin queue is restarted. Signed-off-by: Hannes Reinecke <hare@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-03-20nvmet: Add 'sq' argument to alloc_ctrl_argsHannes Reinecke
For secure concatenation the result of the TLS handshake will be stored in the 'sq' struct, so add it to the alloc_ctrl_args struct. Cc: Damien Le Moal <dlemoal@kernel.org> Signed-off-by: Hannes Reinecke <hare@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-03-20nvme-fabrics: reset admin connection for secure concatenationHannes Reinecke
When secure concatenation is requested the connection needs to be reset to enable TLS encryption on the new cnnection. That implies that the original connection used for the DH-CHAP negotiation really shouldn't be used, and we should reset as soon as the DH-CHAP negotiation has succeeded on the admin queue. Based on an idea from Sagi. Signed-off-by: Hannes Reinecke <hare@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-03-20nvme-tcp: request secure channel concatenationHannes Reinecke
Add a fabrics option 'concat' to request secure channel concatenation as specified the NVME Base Specification v2.1, section 8.3.4.3: Secure Channel Concatenation. When secure channel concatenation is enabled a 'generated PSK' is inserted into the keyring such that it's available after reset. Signed-off-by: Hannes Reinecke <hare@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-03-20nvme-keyring: add nvme_tls_psk_refresh()Hannes Reinecke
Add a function to refresh a generated PSK in the specified keyring. Signed-off-by: Hannes Reinecke <hare@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-03-20nvme: add nvme_auth_derive_tls_psk()Hannes Reinecke
Add a function to derive the TLS PSK as specified TP8018. Signed-off-by: Hannes Reinecke <hare@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-03-20nvme: add nvme_auth_generate_digest()Hannes Reinecke
Add a function to calculate the PSK digest as specified in TP8018. Signed-off-by: Hannes Reinecke <hare@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-03-20nvme: add nvme_auth_generate_psk()Hannes Reinecke
Add a function to generate a NVMe PSK from the shared credentials negotiated by DH-HMAC-CHAP. Signed-off-by: Hannes Reinecke <hare@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-03-20crypto,fs: Separate out hkdf_extract() and hkdf_expand()Hannes Reinecke
Separate out the HKDF functions into a separate module to to make them available to other callers. And add a testsuite to the module with test vectors from RFC 5869 (and additional vectors for SHA384 and SHA512) to ensure the integrity of the algorithm. Signed-off-by: Hannes Reinecke <hare@kernel.org> Acked-by: Eric Biggers <ebiggers@kernel.org> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Keith Busch <kbusch@kernel.org>
2025-03-20selftests: ublk: add variable for user to not show test resultMing Lei
Some user decides test result by exit code only, and wouldn't like to be bothered by the test result. Signed-off-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20250320013743.4167489-4-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-03-20selftests: ublk: don't show `modprobe` failureMing Lei
ublk_drv may be built-in, so don't show modprobe failure, and we do check `/dev/ublk-control` for skipping test if ublk_drv isn't enabled. Reported-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20250320013743.4167489-3-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-03-20selftests: ublk: add one dependency headerMing Lei
Add one dependency helper which can include new uapi definition which isn't synced from kernel. This way also helps a lot for downstream test deployment. Signed-off-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20250320013743.4167489-2-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-03-20pds_core: add new fwctl auxiliary_deviceShannon Nelson
Add support for a new fwctl-based auxiliary_device for creating a channel for fwctl support into the AMD/Pensando DSC. Link: https://patch.msgid.link/r/20250320194412.67983-4-shannon.nelson@amd.com Reviewed-by: Leon Romanovsky <leonro@nvidia.com> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Shannon Nelson <shannon.nelson@amd.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2025-03-20pds_core: specify auxiliary_device to be createdShannon Nelson
In preparation for adding a new auxiliary_device for the PF, make the vif type an argument to pdsc_auxbus_dev_add(). Pass in the address of the padev pointer so that the caller can specify where to save it and keep the mutex usage within the function. Link: https://patch.msgid.link/r/20250320194412.67983-3-shannon.nelson@amd.com Reviewed-by: Leon Romanovsky <leonro@nvidia.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Shannon Nelson <shannon.nelson@amd.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2025-03-20pds_core: make pdsc_auxbus_dev_del() voidShannon Nelson
Since there really is no useful return, advertising a return value is rather misleading. Make pdsc_auxbus_dev_del() a void function. Link: https://patch.msgid.link/r/20250320194412.67983-2-shannon.nelson@amd.com Reviewed-by: Leon Romanovsky <leonro@nvidia.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Shannon Nelson <shannon.nelson@amd.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2025-03-20PCI: Move cardbus IO size declarations into pci/pci.hIlpo Järvinen
For some reason, cardbus related io/mem size declarations are in linux/pci.h, whereas non-cardbus sizes are already in pci/pci.h. Move all them into one place in pci/pci.h. Link: https://lore.kernel.org/r/20250311174701.3586-4-ilpo.jarvinen@linux.intel.com Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2025-03-20PCI: Make pci_setup_bridge() staticIlpo Järvinen
pci_setup_bridge() is only used within setup-bus.c. Therefore, make it a static function. Link: https://lore.kernel.org/r/20250311174701.3586-3-ilpo.jarvinen@linux.intel.com Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2025-03-20PCI: Move resource reassignment func declarations into pci/pci.hIlpo Järvinen
Neither pci_reassign_bridge_resources() nor pci_reassign_resource() is used outside of the PCI subsystem. They seem to be naturally static functions but since resource fitting/assignment is split between setup-bus.c and setup-res.c, they fall into different sides of the divide and need to be declared. Move the declarations of pci_reassign_bridge_resources() and pci_reassign_resource() into pci/pci.h to keep them internal to PCI subsystem. Link: https://lore.kernel.org/r/20250311174701.3586-2-ilpo.jarvinen@linux.intel.com Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2025-03-20PCI: Move pci_rescan_bus_bridge_resize() declaration to pci/pci.hIlpo Järvinen
pci_rescan_bus_bridge_resize() is only used by code inside PCI subsystem. The comment also falsely advertises it to be for hotplug drivers, yet the only caller is from sysfs store function. Move the function declaration into pci/pci.h. Link: https://lore.kernel.org/r/20250311174701.3586-1-ilpo.jarvinen@linux.intel.com Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2025-03-20PCI: Fix BAR resizing when VF BARs are assignedIlpo Järvinen
__resource_resize_store() attempts to release all resources of the device before attempting the resize. The loop, however, only covers standard BARs (< PCI_STD_NUM_BARS). If a device has VF BARs that are assigned, pci_reassign_bridge_resources() finds the bridge window still has some assigned child resources and returns -NOENT which makes pci_resize_resource() to detect an error and abort the resize. Change the release loop to cover all resources up to VF BARs which allows the resize operation to release the bridge windows and attempt to assigned them again with the different size. If SR-IOV is enabled, disallow resize as it requires releasing also IOV resources. Link: https://lore.kernel.org/r/20250320142837.8027-1-ilpo.jarvinen@linux.intel.com Fixes: 91fa127794ac ("PCI: Expose PCIe Resizable BAR support via sysfs") Reported-by: Michał Winiarski <michal.winiarski@intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
2025-03-20PCI: Allow PCI bridges to go to D3Hot on all non-x86Manivannan Sadhasivam
Currently, pci_bridge_d3_possible() encodes a variety of decision factors when deciding whether a given bridge can be put into D3. A particular one of note is for "recent enough PCIe ports." Per Rafael [0]: "There were hardware issues related to PM on x86 platforms predating the introduction of Connected Standby in Windows. For instance, programming a port into D3hot by writing to its PMCSR might cause the PCIe link behind it to go down and the only way to revive it was to power cycle the Root Complex. And similar." Thus, this function contains a DMI-based check for post-2015 BIOS. The above factors (Windows, x86) don't really apply to non-x86 systems, and also, many such systems don't have BIOS or DMI. However, we'd like to be able to suspend bridges on non-x86 systems too. Restrict the "recent enough" check to x86. If we find further incompatibilities, it probably makes sense to expand on the deny-list approach (i.e., bridge_d3_blacklist or similar). Link: https://lore.kernel.org/r/20250320110604.v6.1.Id0a0e78ab0421b6bce51c4b0b87e6aebdfc69ec7@changeid Link: https://lore.kernel.org/linux-pci/CAJZ5v0j_6jeMAQ7eFkZBe5Yi+USGzysxAgfemYh=-zq4h5W+Qg@mail.gmail.com/ [0] Link: https://lore.kernel.org/linux-pci/20240227225442.GA249898@bhelgaas/ [1] Link: https://lore.kernel.org/linux-pci/20240828210705.GA37859@bhelgaas/ [2] [Brian: rewrite to !X86 based on Rafael's suggestions] Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Brian Norris <briannorris@chromium.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2025-03-20cpumask: align text in commentJoel Savitz
Since commit 4e1a7df45480 ("cpumask: Add enabled cpumask for present CPUs that can be brought online") introduced cpu_enabled_mask, the comment line describing the mask has been slightly out of alignment with the adjacent lines. Fix this by removing a single space character. Signed-off-by: Joel Savitz <jsavitz@redhat.com> Signed-off-by: Yury Norov <yury.norov@gmail.com>
2025-03-20hyperv: Add definitions for root partition driver to hv headersNuno Das Neves
A few additional definitions are required for the mshv driver code (to follow). Introduce those here and clean up a little bit while at it. Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com> Reviewed-by: Roman Kisel <romank@linux.microsoft.com> Reviewed-by: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com> Reviewed-by: Tianyu Lan <tiala@microsoft.com> Link: https://lore.kernel.org/r/1741980536-3865-10-git-send-email-nunodasneves@linux.microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <1741980536-3865-10-git-send-email-nunodasneves@linux.microsoft.com>
2025-03-20x86: hyperv: Add mshv_handler() irq handler and setup functionNuno Das Neves
Add mshv_handler() to process messages related to managing guest partitions such as intercepts, doorbells, and scheduling messages. In a (non-nested) root partition, the same interrupt vector is shared between the vmbus and mshv_root drivers. Introduce a stub for mshv_handler() and call it in sysvec_hyperv_callback alongside vmbus_handler(). Even though both handlers will be called for every Hyper-V interrupt, the messages for each driver are delivered to different offsets within the SYNIC message page, so they won't step on each other. Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com> Reviewed-by: Wei Liu <wei.liu@kernel.org> Reviewed-by: Tianyu Lan <tiala@microsoft.com> Reviewed-by: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com> Link: https://lore.kernel.org/r/1741980536-3865-9-git-send-email-nunodasneves@linux.microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <1741980536-3865-9-git-send-email-nunodasneves@linux.microsoft.com>
2025-03-20Drivers: hv: Introduce per-cpu event ring tailNuno Das Neves
Add a pointer hv_synic_eventring_tail to track the tail pointer for the SynIC event ring buffer for each SINT. This will be used by the mshv driver, but must be tracked independently since the driver module could be removed and re-inserted. Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com> Reviewed-by: Wei Liu <wei.liu@kernel.org> Reviewed-by: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com> Link: https://lore.kernel.org/r/1741980536-3865-8-git-send-email-nunodasneves@linux.microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <1741980536-3865-8-git-send-email-nunodasneves@linux.microsoft.com>
2025-03-20Drivers: hv: Export some functions for use by root partition moduleNuno Das Neves
hv_get_hypervisor_version(), hv_call_deposit_pages(), and hv_call_create_vp(), are all needed in-module with CONFIG_MSHV_ROOT=m. Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com> Reviewed-by: Stanislav Kinsburskii <skinsburskii@microsoft.linux.com> Reviewed-by: Roman Kisel <romank@linux.microsoft.com> Reviewed-by: Easwar Hariharan <eahariha@linux.microsoft.com> Reviewed-by: Tianyu Lan <tiala@microsoft.com> Link: https://lore.kernel.org/r/1741980536-3865-7-git-send-email-nunodasneves@linux.microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <1741980536-3865-7-git-send-email-nunodasneves@linux.microsoft.com>
2025-03-20acpi: numa: Export node_to_pxm()Nuno Das Neves
node_to_pxm() is used by hv_numa_node_to_pxm_info(). That helper will be used by Hyper-V root partition module code when CONFIG_MSHV_ROOT=m. Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com> Reviewed-by: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com> Reviewed-by: Easwar Hariharan <eahariha@linux.microsoft.com> Reviewed-by: Michael Kelley <mhklinux@outlook.com> Reviewed-by: Tianyu Lan <tiala@microsoft.com> Link: https://lore.kernel.org/r/1741980536-3865-6-git-send-email-nunodasneves@linux.microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <1741980536-3865-6-git-send-email-nunodasneves@linux.microsoft.com>
2025-03-20hyperv: Introduce hv_recommend_using_aeoi()Nuno Das Neves
Factor out the check for enabling auto eoi, to be reused in root partition code. No functional changes. Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com> Reviewed-by: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com> Reviewed-by: Easwar Hariharan <eahariha@linux.microsoft.com> Reviewed-by: Michael Kelley <mhklinux@outlook.com> Reviewed-by: Tianyu Lan <tiala@microsoft.com> Link: https://lore.kernel.org/r/1741980536-3865-5-git-send-email-nunodasneves@linux.microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <1741980536-3865-5-git-send-email-nunodasneves@linux.microsoft.com>
2025-03-20arm64/hyperv: Add some missing functions to arm64Nuno Das Neves
These non-nested msr and fast hypercall functions are present in x86, but they must be available in both architectures for the root partition driver code. While at it, remove the redundant 'extern' keywords from the hv_do_hypercall() variants in asm-generic/mshyperv.h. Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com> Reviewed-by: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com> Reviewed-by: Roman Kisel <romank@linux.microsoft.com> Link: https://lore.kernel.org/r/1741980536-3865-4-git-send-email-nunodasneves@linux.microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <1741980536-3865-4-git-send-email-nunodasneves@linux.microsoft.com>
2025-03-20x86/mshyperv: Add support for extended Hyper-V featuresStanislav Kinsburskii
Extend the "ms_hyperv_info" structure to include a new field, "ext_features", for capturing extended Hyper-V features. Update the "ms_hyperv_init_platform" function to retrieve these features using the cpuid instruction and include them in the informational output. Signed-off-by: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com> Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com> Reviewed-by: Easwar Hariharan <eahariha@linux.microsoft.com> Reviewed-by: Roman Kisel <romank@linux.microsoft.com> Reviewed-by: Tianyu Lan <tiala@microsoft.com> Reviewed-by: Michael Kelley <mhklinux@outlook.com> Link: https://lore.kernel.org/r/1741980536-3865-3-git-send-email-nunodasneves@linux.microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <1741980536-3865-3-git-send-email-nunodasneves@linux.microsoft.com>
2025-03-20hyperv: Log hypercall status codes as stringsNuno Das Neves
Introduce hv_status_printk() macros as a convenience to log hypercall errors, formatting them with the status code (HV_STATUS_*) as a raw hex value and also as a string, which saves some time while debugging. Create a table of HV_STATUS_ codes with strings and mapped errnos, and use it for hv_result_to_string() and hv_result_to_errno(). Use the new hv_status_printk()s in hv_proc.c, hyperv-iommu.c, and irqdomain.c hypercalls to aid debugging in the root partition. Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com> Reviewed-by: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com> Link: https://lore.kernel.org/r/1741980536-3865-2-git-send-email-nunodasneves@linux.microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <1741980536-3865-2-git-send-email-nunodasneves@linux.microsoft.com>
2025-03-20x86/hyperv: Fix check of return value from snp_set_vmsa()Tianyu Lan
snp_set_vmsa() returns 0 as success result and so fix it. Cc: stable@vger.kernel.org Fixes: 44676bb9d566 ("x86/hyperv: Add smp support for SEV-SNP guest") Signed-off-by: Tianyu Lan <tiala@microsoft.com> Reviewed-by: Michael Kelley <mhklinux@outlook.com> Link: https://lore.kernel.org/r/20250313085217.45483-1-ltykernel@gmail.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <20250313085217.45483-1-ltykernel@gmail.com>
2025-03-20x86/hyperv: Add VTL mode callback for restarting the systemRoman Kisel
The kernel runs as a firmware in the VTL mode, and the only way to restart in the VTL mode on x86 is to triple fault. Thus, one has to always supply "reboot=t" on the kernel command line in the VTL mode, and missing that renders rebooting not working. Define the machine restart callback to always use the triple fault to provide the robust configuration by default. Signed-off-by: Roman Kisel <romank@linux.microsoft.com> Link: https://lore.kernel.org/r/20250227214728.15672-3-romank@linux.microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <20250227214728.15672-3-romank@linux.microsoft.com>
2025-03-20x86/hyperv: Add VTL mode emergency restart callbackRoman Kisel
By default, X86(-64) systems use the emergecy restart routine in the course of which the code unconditionally writes to the physical address of 0x472 to indicate the boot mode to the firmware (BIOS or UEFI). When the kernel itself runs as a firmware in the VTL mode, that write corrupts the memory of the guest upon emergency restarting. Preserving the state intact in that situation is important for debugging, at least. Define the specialized machine callback to avoid that write and use the triple fault to perform emergency restart. Signed-off-by: Roman Kisel <romank@linux.microsoft.com> Link: https://lore.kernel.org/r/20250227214728.15672-2-romank@linux.microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <20250227214728.15672-2-romank@linux.microsoft.com>
2025-03-20hyperv: Remove unused union and structsThorsten Blum
The union vmpacket_largest_possible_header and several structs have not been used for a long time afaict - remove them. Reviewed-by: Michael Kelley <mhklinux@outlook.com> Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev> Link: https://lore.kernel.org/r/20250311091634.494888-2-thorsten.blum@linux.dev Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <20250311091634.494888-2-thorsten.blum@linux.dev>
2025-03-20hyperv: Add CONFIG_MSHV_ROOT to gate root partition supportNuno Das Neves
CONFIG_MSHV_ROOT allows kernels built to run as a normal Hyper-V guest to exclude the root partition code, which is expected to grow significantly over time. This option is a tristate so future driver code can be built as a (m)odule, allowing faster development iteration cycles. If CONFIG_MSHV_ROOT is disabled, don't compile hv_proc.c, and stub hv_root_partition() to return false unconditionally. This allows the compiler to optimize away root partition code blocks since they will be disabled at compile time. In the case of booting as root partition *without* CONFIG_MSHV_ROOT enabled, print a critical error (the kernel will likely crash). Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com> Reviewed-by: Easwar Hariharan <eahariha@linux.microsoft.com> Reviewed-by: Michael Kelley <mhklinux@outlook.com> Link: https://lore.kernel.org/r/1740167795-13296-4-git-send-email-nunodasneves@linux.microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org> Message-ID: <1740167795-13296-4-git-send-email-nunodasneves@linux.microsoft.com>
2025-03-20Merge tag 'vfs-6.14-final.fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs Pull vfs fixes from Christian Brauner: "A final set of fixes for this cycle: VFS: - Ensure that the stable offset api doesn't return duplicate directory entries when userspace has to perform the getdents call multiple times on large directories afs: - Prevent invalid pointer dereference during get_link RCU pathwalk fuse: - Fix deadlock caused by uninitialized rings when using io_uring with fuse - Handle race condition when using io_uring with fuse to prevent NULL dereference libnetfs: - Ensure that invalidate_cache is only called if implemented - Fix collection of results during pause when collection is offloaded - Ensure rolling_buffer_load_from_ra() doesn't clear mark bits - Make netfs_unbuffered_read() return ssize_t rather than int" * tag 'vfs-6.14-final.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: libfs: Fix duplicate directory entry in offset_dir_lookup fuse: fix possible deadlock if rings are never initialized netfs: Fix netfs_unbuffered_read() to return ssize_t rather than int netfs: Fix rolling_buffer_load_from_ra() to not clear mark bits netfs: Call `invalidate_cache` only if implemented netfs: Fix collection of results during pause when collection offloaded fuse: fix uring race condition for null dereference of fc afs: Fix afs_atcell_get_link() to check if ws_cell is unset first
2025-03-20Merge tag 'for-netdev' of ↵Paolo Abeni
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next Martin KaFai Lau says: ==================== pull-request: bpf-next 2025-03-13 The following pull-request contains BPF updates for your *net-next* tree. We've added 4 non-merge commits during the last 3 day(s) which contain a total of 2 files changed, 35 insertions(+), 12 deletions(-). The main changes are: 1) bpf_getsockopt support for TCP_BPF_RTO_MIN and TCP_BPF_DELACK_MAX, from Jason Xing bpf-next-for-netdev * tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: selftests/bpf: Add bpf_getsockopt() for TCP_BPF_DELACK_MAX and TCP_BPF_RTO_MIN tcp: bpf: Support bpf_getsockopt for TCP_BPF_DELACK_MAX tcp: bpf: Support bpf_getsockopt for TCP_BPF_RTO_MIN tcp: bpf: Introduce bpf_sol_tcp_getsockopt to support TCP_BPF flags ==================== Link: https://patch.msgid.link/20250313221620.2512684-1-martin.lau@linux.dev Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-03-20rust: str: implement `strip_prefix` for `BStr`Andreas Hindborg
Implement `strip_prefix` for `BStr` by deferring to `slice::strip_prefix` on the underlying `&[u8]`. Reviewed-by: Gary Guo <gary@garyguo.net> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Tested-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org> Tested-by: Daniel Gomez <da.gomez@samsung.com> Link: https://lore.kernel.org/r/20250227-module-params-v3-v8-4-ceeee85d9347@kernel.org [ Pluralized section name. Hid `use`. - Miguel ] Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2025-03-20rust: str: implement `AsRef<BStr>` for `[u8]` and `BStr`Andreas Hindborg
Implement `AsRef<BStr>` for `[u8]` and `BStr` so these can be used interchangeably for operations on `BStr`. Reviewed-by: Gary Guo <gary@garyguo.net> Tested-by: Daniel Almeida <daniel.almeida@collabora.com> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org> Reviewed-by: Fiona Behrens <me@kloenk.dev> Tested-by: Daniel Gomez <da.gomez@samsung.com> Link: https://lore.kernel.org/r/20250227-module-params-v3-v8-3-ceeee85d9347@kernel.org Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2025-03-20rust: str: implement `Index` for `BStr`Andreas Hindborg
The `Index` implementation on `BStr` was lost when we switched `BStr` from a type alias of `[u8]` to a newtype. Add back `Index` by implementing `Index` for `BStr` when `Index` would be implemented for `[u8]`. Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Tested-by: Daniel Almeida <daniel.almeida@collabora.com> Reviewed-by: Fiona Behrens <me@kloenk.dev> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Tested-by: Daniel Gomez <da.gomez@samsung.com> Link: https://lore.kernel.org/r/20250227-module-params-v3-v8-2-ceeee85d9347@kernel.org Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2025-03-20rust: str: implement `PartialEq` for `BStr`Andreas Hindborg
Implement `PartialEq` for `BStr` by comparing underlying byte slices. Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Gary Guo <gary@garyguo.net> Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com> Tested-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org> Reviewed-by: Fiona Behrens <me@kloenk.dev> Tested-by: Daniel Gomez <da.gomez@samsung.com> Link: https://lore.kernel.org/r/20250227-module-params-v3-v8-1-ceeee85d9347@kernel.org Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
generated by cgit (git 2.34.1) at 2025-09-15 17:08:47 +0000