- 01 Jun, 2022 1 commit
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Juergen Gross authored
xen_remap() is used to establish mappings for frames not under direct control of the kernel: for Xenstore and console ring pages, and for grant pages of non-PV guests. Today xen_remap() is defined to use ioremap() on x86 (doing uncached mappings), and ioremap_cache() on Arm (doing cached mappings). Uncached mappings for those use cases are bad for performance, so they should be avoided if possible. As all use cases of xen_remap() don't require uncached mappings (the mapped area is always physical RAM), a mapping using the standard WB cache mode is fine. As sparse is flagging some of the xen_remap() use cases to be not appropriate for iomem(), as the result is not annotated with the __iomem modifier, eliminate xen_remap() completely and replace all use cases with memremap() specifying the MEMREMAP_WB caching mode. xen_unmap() can be replaced with memunmap(). Reported-by:
kernel test robot <lkp@intel.com> Signed-off-by:
Juergen Gross <jgross@suse.com> Reviewed-by:
Boris Ostrovsky <boris.ostrovsky@oracle.com> Acked-by:
Stefano Stabellini <sstabellini@kernel.org> Link: https://lore.kernel.org/r/20220530082634.6339-1-jgross@suse.comSigned-off-by:
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- 28 May, 2022 1 commit
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Boris Ostrovsky authored
Due to time constraints I am stepping down as maintainter. I will stay as reviewer for x86 code (for which create a separate category). Stefano is now maintainer for Xen hypervisor interface and Oleksandr has graciously agreed to become a reviewer. Signed-off-by:
Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com> Link: https://lore.kernel.org/r/1653674225-10447-1-git-send-email-boris.ostrovsky@oracle.comSigned-off-by:
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- 27 May, 2022 1 commit
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Juergen Gross authored
Instead of a virtual kernel address use a pointer of the associated struct page as second parameter of gnttab_end_foreign_access(). Most users have that pointer available already and are creating the virtual address from it, risking problems in case the memory is located in highmem. gnttab_end_foreign_access() itself won't need to get the struct page from the address again. Suggested-by:
Jan Beulich <jbeulich@suse.com> Signed-off-by:
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- 19 May, 2022 29 commits
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Luca Miccio authored
When running as dom0less guest (HVM domain on ARM) the xenstore event channel is available at domain creation but the shared xenstore interface page only becomes available later on. In that case, wait for a notification on the xenstore event channel, then complete the xenstore initialization later, when the shared page is actually available. The xenstore page has few extra field. Add them to the shared struct. One of the field is "connection", when the connection is ready, it is zero. If the connection is not-zero, wait for a notification. Signed-off-by:
Luca Miccio <lucmiccio@gmail.com> Signed-off-by:
Stefano Stabellini <stefano.stabellini@xilinx.com> Reviewed-by:
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Stefano Stabellini authored
Sync the xs_wire.h header file in Linux with the one in Xen. Signed-off-by:
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Maximilian Heyne authored
Since commit 4d65adfc ("x86: xen: insn: Decode Xen and KVM emulate-prefix signature"), objtool is able to correctly parse the prefixed instruction in xen_cpuid and emit correct orc unwind information. Hence, marking the function as STACKFRAME_NON_STANDARD is no longer needed. This commit is basically a revert of commit 983bb6d2 ("x86/xen: Mark xen_cpuid() stack frame as non-standard"). Signed-off-by:
Maximilian Heyne <mheyne@amazon.de> Reviewed-by:
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SeongJae Park authored
SeongJae is currently listed as a contact point for some blk{back,front} features, but he will not work for XEN for a while. This commit therefore updates the contact point to his colleague, Maximilian, who is understanding the context and actively working with the features now. Signed-off-by:SeongJae Park <sj@kernel.org> Signed-off-by:
Roger Pau Monné <roger.pau@citrix.com> Link: https://lore.kernel.org/r/20220420072734.1692-1-sj@kernel.orgSigned-off-by:
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Juergen Gross authored
There is no external user of xenbus_grant_ring() left, so merge it into the only caller xenbus_setup_ring(). Signed-off-by:
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Juergen Gross authored
Simplify sndfront's ring creation and removal via xenbus_setup_ring() and xenbus_teardown_ring(). Signed-off-by:
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Juergen Gross authored
Simplify xen-hcd's ring creation and removal via xenbus_setup_ring() and xenbus_teardown_ring(). Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
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Juergen Gross authored
Simplify scsifront's ring creation and removal via xenbus_setup_ring() and xenbus_teardown_ring(). Signed-off-by:
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Juergen Gross authored
Simplify pcifront's shared page creation and removal via xenbus_setup_ring() and xenbus_teardown_ring(). Signed-off-by:
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Juergen Gross authored
Simplify drmfront's ring creation and removal via xenbus_setup_ring() and xenbus_teardown_ring(). Signed-off-by:
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Juergen Gross authored
Simplify tpmfront's ring creation and removal via xenbus_setup_ring() and xenbus_teardown_ring(), which are provided exactly for the use pattern as seen in this driver. Signed-off-by: -
Juergen Gross authored
Simplify netfront's ring creation and removal via xenbus_setup_ring() and xenbus_teardown_ring(). Signed-off-by:
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Juergen Gross authored
Simplify blkfront's ring creation and removal via xenbus_setup_ring() and xenbus_teardown_ring(). Signed-off-by:
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Juergen Gross authored
Most PV device frontends share very similar code for setting up shared ring buffers: - allocate page(s) - init the ring admin data - give the backend access to the ring via grants Tearing down the ring requires similar actions in all frontends again: - remove grants - free the page(s) Provide service functions xenbus_setup_ring() and xenbus_teardown_ring() for that purpose. Signed-off-by:
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Juergen Gross authored
Update include/xen/interface/io/ring.h to its newest version. Switch the two improper use cases of RING_HAS_UNCONSUMED_RESPONSES() to XEN_RING_NR_UNCONSUMED_RESPONSES() in order to avoid the nasty XEN_RING_HAS_UNCONSUMED_IS_BOOL #define. Signed-off-by:
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Juergen Gross authored
Instead of using a private macro for an invalid grant reference use the common one. Signed-off-by:
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Juergen Gross authored
Instead of using a private macro for an invalid grant reference use the common one. Signed-off-by:
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Juergen Gross authored
Instead of using a private macro for an invalid grant reference use the common one. Signed-off-by:
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Juergen Gross authored
Instead of using a private macro for an invalid grant reference use the common one. Signed-off-by:
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Juergen Gross authored
Instead of using a private macro for an invalid grant reference use the common one. Signed-off-by:
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Juergen Gross authored
GRANT_INVALID_REF isn't used in scsifront, so remove it. Signed-off-by:
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Juergen Gross authored
Instead of using a private macro for an invalid grant reference use the common one. Signed-off-by:
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Juergen Gross authored
Instead of using a private macro for an invalid grant reference use the common one. Signed-off-by:
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Juergen Gross authored
Make sure a reserved grant is never put on the free list, as this could cause hard to debug errors. Signed-off-by:
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Juergen Gross authored
Update include/xen/interface/grant_table.h to its newest version. This allows to drop some private definitions in grant-table.c and include/xen/grant_table.h. Signed-off-by:
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Juergen Gross authored
Instead of relying on a well behaved PV scsi backend verify all meta data received from the backend and avoid multiple reads of the same data from the shared ring page. In case any illegal data from the backend is detected switch the PV device to a new "error" state and deactivate it for further use. Use the "lateeoi" variant for the event channel in order to avoid event storms blocking the guest. Signed-off-by:
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Juergen Gross authored
Add a translation layer for the command result values. Signed-off-by:
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Juergen Gross authored
Instead of using the kernel's values for the result of PV scsi operations use the values of the interface definition. Signed-off-by:
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Juergen Gross authored
Update include/xen/interface/io/vscsiif.h to its newest version. Signed-off-by:
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- 16 May, 2022 1 commit
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Linus Torvalds authored
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- 15 May, 2022 7 commits
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Linus Torvalds authored
Merge tag 'driver-core-5.18-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core fixes from Greg KH: "Here is one fix, and three documentation updates for 5.18-rc7. The fix is for the firmware loader which resolves a long-reported problem where the credentials of the firmware loader could be set to a userspace process without enough permissions to actually load the firmware image. Many Android vendors have been reporting this for quite some time. The documentation updates are for the embargoed-hardware-issues.rst file to add a new entry, change an existing one, and sort the list to make changes easier in the future. All of these have been in linux-next for a while with no reported issues" * tag 'driver-core-5.18-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: Documentation/process: Update ARM contact for embargoed hardware issues Documentation/process: Add embargoed HW contact for Ampere Computing Documentation/process: Make groups alphabetical and use tabs consistently firmware_loader: use kernel credentials when reading firmware
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-miscLinus Torvalds authored
Pull char/misc driver fixes from Greg KH: "Here are two small driver fixes for 5.18-rc7 that resolve reported problems: - slimbus driver irq bugfix - interconnect sync state bugfix Both of these have been in linux-next with no reported problems" * tag 'char-misc-5.18-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: slimbus: qcom: Fix IRQ check in qcom_slim_probe interconnect: Restore sync state by ignoring ipa-virt in provider count
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/ttyLinus Torvalds authored
Pull tty/serial driver fixes from Greg KH: "Here are some small tty n_gsm and serial driver fixes for 5.18-rc7 that resolve reported problems. They include: - n_gsm fixes for reported issues - 8250_mtk driver fixes for some platforms - fsl_lpuart driver fix for reported problem. - digicolor driver fix for reported problem. All have been in linux-next for a while with no reported problems" * tag 'tty-5.18-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: fsl_lpuart: Don't enable interrupts too early tty: n_gsm: fix invalid gsmtty_write_room() result tty: n_gsm: fix mux activation issues in gsm_config() tty: n_gsm: fix buffer over-read in gsm_dlci_data() serial: 8250_mtk: Fix register address for XON/XOFF character serial: 8250_mtk: Make sure to select the right FEATURE_SEL serial: 8250_mtk: Fix UART_EFR register address tty/serial: digicolor: fix possible null-ptr-deref in digicolor_uart_probe()
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usbLinus Torvalds authored
Pull USB fixes from Greg KH: "Here are some small fixes for reported issues with some USB drivers. They include: - xhci fixes for xhci-mtk platform driver - typec driver fixes for reported problems. - cdc-wdm read-stuck fix - gadget driver fix for reported race condition - new usb-serial driver ids All of these have been in linux-next with no reported problems" * tag 'usb-5.18-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: usb: xhci-mtk: remove bandwidth budget table usb: xhci-mtk: fix fs isoc's transfer error usb: gadget: fix race when gadget driver register via ioctl usb: typec: tcpci_mt6360: Update for BMC PHY setting usb: gadget: uvc: allow for application to cleanly shutdown usb: typec: tcpci: Don't skip cleanup in .remove() on error usb: cdc-wdm: fix reading stuck on device close USB: serial: qcserial: add support for Sierra Wireless EM7590 USB: serial: option: add Fibocom MA510 modem USB: serial: option: add Fibocom L610 modem USB: serial: pl2303: add device id for HP LM930 Display
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linuxLinus Torvalds authored
Pull powerpc fix from Michael Ellerman: - Fix KVM PR on 32-bit, which was broken by some MMU code refactoring. Thanks to: Alexander Graf, and Matt Evans. * tag 'powerpc-5.18-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: KVM: PPC: Book3S PR: Enable MSR_DR for switch_mmu_context()
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 fix from Thomas Gleixner: "A single fix for the handling of unpopulated sub-pmd spaces. The copy & pasta from the corresponding s390 code screwed up the address calculation for marking the sub-pmd ranges via memset by omitting the ALIGN_DOWN() to calculate the proper start address. It's a mystery why this code is not generic and shared because there is nothing architecture specific in there, but that's too intrusive for a backportable fix" * tag 'x86-urgent-2022-05-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mm: Fix marking of unused sub-pmd ranges
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull scheduler fix from Thomas Gleixner: "The recent expansion of the sched switch tracepoint inserted a new argument in the middle of the arguments. This reordering broke BPF programs which relied on the old argument list. While tracepoints are not considered stable ABI, it's not trivial to make BPF cope with such a change, but it's being worked on. For now restore the original argument order and move the new argument to the end of the argument list" * tag 'sched-urgent-2022-05-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched/tracing: Append prev_state to tp args instead
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