user/sven/linux.git/include/xen, branch v5.8.11

xen: Move xen_setup_callback_vector() definition to include/xen/hvm.h

2020-06-11T13:15:19Z

Kbuild test robot reports the following problem on ARM: for 'xen_setup_callback_vector' [-Wmissing-prototypes] 1664 | void xen_setup_callback_vector(void) {} | ^~~~~~~~~~~~~~~~~~~~~~~~~ The problem is that xen_setup_callback_vector is a x86 only thing, its definition is present in arch/x86/xen/xen-ops.h but not on ARM. In events_base.c there is a stub for !CONFIG_XEN_PVHVM but it is not declared as 'static'. On x86 the situation is hardly better: drivers/xen/events/events_base.c doesn't include 'xen-ops.h' from arch/x86/xen/, it includes its namesake from include/xen/ which also results in a 'no previous prototype' warning. Currently, xen_setup_callback_vector() has two call sites: one in drivers/xen/events_base.c and another in arch/x86/xen/suspend_hvm.c. The former is placed under #ifdef CONFIG_X86 and the later is only compiled in when CONFIG_XEN_PVHVM. Resolve the issue by moving xen_setup_callback_vector() declaration to arch neutral 'include/xen/hvm.h' as the implementation lives in arch neutral drivers/xen/events/events_base.c. Reported-by: kbuild test robot Signed-off-by: Vitaly Kuznetsov Signed-off-by: Thomas Gleixner Reviewed-by: Juergen Gross Link: https://lkml.kernel.org/r/20200520161600.361895-1-vkuznets@redhat.com

x86/entry: Convert XEN hypercall vector to IDTENTRY_SYSVEC

2020-06-11T13:15:15Z

Convert the last oldstyle defined vector to IDTENTRY_SYSVEC: - Implement the C entry point with DEFINE_IDTENTRY_SYSVEC - Emit the ASM stub with DECLARE_IDTENTRY_SYSVEC - Remove the ASM idtentries in 64-bit - Remove the BUILD_INTERRUPT entries in 32-bit - Remove the old prototypes Fixup the related XEN code by providing the primary C entry point in x86 to avoid cluttering the generic code with X86'isms. No functional change. Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar Acked-by: Andy Lutomirski Link: https://lore.kernel.org/r/20200521202119.741950104@linutronix.de

x86/entry: Switch XEN/PV hypercall entry to IDTENTRY

2020-06-11T13:15:08Z

Convert the XEN/PV hypercall to IDTENTRY: - Emit the ASM stub with DECLARE_IDTENTRY - Remove the ASM idtentry in 64-bit - Remove the open coded ASM entry code in 32-bit - Remove the old prototypes The handler stubs need to stay in ASM code as they need corner case handling and adjustment of the stack pointer. Provide a new C function which invokes the entry/exit handling and calls into the XEN handler on the interrupt stack if required. The exit code is slightly different from the regular idtentry_exit() on non-preemptible kernels. If the hypercall is preemptible and need_resched() is set then XEN provides a preempt hypercall scheduling function. Move this functionality into the entry code so it can use the existing idtentry functionality. [ mingo: Build fixes. ] Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar Acked-by: Andy Lutomirski Acked-by: Juergen Gross Tested-by: Juergen Gross Link: https://lore.kernel.org/r/20200521202118.055270078@linutronix.de

mm: reorder includes after introduction of linux/pgtable.h

2020-06-09T16:39:13Z

The replacement of with made the include of the latter in the middle of asm includes. Fix this up with the aid of the below script and manual adjustments here and there. import sys import re if len(sys.argv) is not 3: print "USAGE: %s

" % (sys.argv[0]) sys.exit(1) hdr_to_move="#include " % sys.argv[2] moved = False in_hdrs = False with open(sys.argv[1], "r") as f: lines = f.readlines() for _line in lines: line = _line.rstrip(' ') if line == hdr_to_move: continue if line.startswith("#include Signed-off-by: Andrew Morton Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Brian Cain Cc: Catalin Marinas Cc: Chris Zankel Cc: "David S. Miller" Cc: Geert Uytterhoeven Cc: Greentime Hu Cc: Greg Ungerer Cc: Guan Xuetao Cc: Guo Ren Cc: Heiko Carstens Cc: Helge Deller Cc: Ingo Molnar Cc: Ley Foon Tan Cc: Mark Salter Cc: Matthew Wilcox Cc: Matt Turner Cc: Max Filippov Cc: Michael Ellerman Cc: Michal Simek Cc: Nick Hu Cc: Paul Walmsley Cc: Richard Weinberger Cc: Rich Felker Cc: Russell King Cc: Stafford Horne Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Tony Luck Cc: Vincent Chen Cc: Vineet Gupta Cc: Will Deacon Cc: Yoshinori Sato Link: http://lkml.kernel.org/r/20200514170327.31389-4-rppt@kernel.org Signed-off-by: Linus Torvalds

mm: introduce include/linux/pgtable.h

2020-06-09T16:39:13Z

The include/linux/pgtable.h is going to be the home of generic page table manipulation functions. Start with moving asm-generic/pgtable.h to include/linux/pgtable.h and make the latter include asm/pgtable.h. Signed-off-by: Mike Rapoport Signed-off-by: Andrew Morton Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Brian Cain Cc: Catalin Marinas Cc: Chris Zankel Cc: "David S. Miller" Cc: Geert Uytterhoeven Cc: Greentime Hu Cc: Greg Ungerer Cc: Guan Xuetao Cc: Guo Ren Cc: Heiko Carstens Cc: Helge Deller Cc: Ingo Molnar Cc: Ley Foon Tan Cc: Mark Salter Cc: Matthew Wilcox Cc: Matt Turner Cc: Max Filippov Cc: Michael Ellerman Cc: Michal Simek Cc: Nick Hu Cc: Paul Walmsley Cc: Richard Weinberger Cc: Rich Felker Cc: Russell King Cc: Stafford Horne Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Tony Luck Cc: Vincent Chen Cc: Vineet Gupta Cc: Will Deacon Cc: Yoshinori Sato Link: http://lkml.kernel.org/r/20200514170327.31389-3-rppt@kernel.org Signed-off-by: Linus Torvalds

xen: Use evtchn_type_t as a type for event channels

2020-04-07T10:12:54Z

Make event channel functions pass event channel port using evtchn_port_t type. It eliminates signed <-> unsigned conversion. Signed-off-by: Yan Yankovskyi Reviewed-by: Boris Ostrovsky Link: https://lore.kernel.org/r/20200323152343.GA28422@kbp1-lhp-F74019 Signed-off-by: Juergen Gross

xen/xenbus: remove unused xenbus_map_ring()

2020-03-30T15:30:46Z

xenbus_map_ring() is used nowhere in the tree, remove it. xenbus_unmap_ring() is used only locally, so make it static and move it up. Signed-off-by: Juergen Gross Reviewed-by: Boris Ostrovsky Signed-off-by: Juergen Gross

xen/xenbus: fix locking

2020-03-05T15:42:23Z

Commit 060eabe8fbe726 ("xenbus/backend: Protect xenbus callback with lock") introduced a bug by holding a lock while calling a function which might schedule. Fix that by using a semaphore instead. Fixes: 060eabe8fbe726 ("xenbus/backend: Protect xenbus callback with lock") Signed-off-by: Juergen Gross Link: https://lore.kernel.org/r/20200305100323.16736-1-jgross@suse.com Reviewed-by: Boris Ostrovsky Signed-off-by: Boris Ostrovsky

xen: Replace zero-length array with flexible-array member

2020-03-05T15:41:58Z

The current codebase makes use of the zero-length array language extension to the C90 standard, but the preferred mechanism to declare variable-length types such as these ones is a flexible array member[1][2], introduced in C99: struct foo { int stuff; struct boo array[]; }; By making use of the mechanism above, we will get a compiler warning in case the flexible array does not occur last in the structure, which will help us prevent some kind of undefined behavior bugs from being inadvertently introduced[3] to the codebase from now on. Also, notice that, dynamic memory allocations won't be affected by this change: "Flexible array members have incomplete type, and so the sizeof operator may not be applied. As a quirk of the original implementation of zero-length arrays, sizeof evaluates to zero."[1] This issue was found with the help of Coccinelle. [1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html [2] https://github.com/KSPP/linux/issues/21 [3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour") Signed-off-by: Gustavo A. R. Silva Link: https://lore.kernel.org/r/20200226212612.GA4663@embeddedor Reviewed-by: Juergen Gross Signed-off-by: Boris Ostrovsky

Merge tag 'for-linus-5.6-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

2020-02-05T17:44:14Z

Pull xen updates from Juergen Gross: - fix a bug introduced in 5.5 in the Xen gntdev driver - fix the Xen balloon driver when running on ancient Xen versions - allow Xen stubdoms to control interrupt enable flags of passed-through PCI cards - release resources in Xen backends under memory pressure * tag 'for-linus-5.6-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen/blkback: Consistently insert one empty line between functions xen/blkback: Remove unnecessary static variable name prefixes xen/blkback: Squeeze page pools if a memory pressure is detected xenbus/backend: Protect xenbus callback with lock xenbus/backend: Add memory pressure handler callback xen/gntdev: Do not use mm notifiers with autotranslating guests xen/balloon: Support xend-based toolstack take two xen-pciback: optionally allow interrupt enable flag writes