[Xen-devel] [PATCH 0/6] xen: Support continuations from tasklets

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

This is the Post "x86/smt: Support for enabling/disabling SMT at runtime" work
which stumbled into discovering XSA-296, for the purpose of making
continuations more efficient.

From testing this series, I have re-confirmed the previous reported
observation that:

  # while :; do xen-hptool smt-enable; xen-hptool smt-disable; done

in dom0 eventually causes the serial console to cease working (wedge midway
through printing a line).

There are sporadic "Broke affinity for IRQ26, new: ffff" messages, but the
serial always seems to break shortly after the first "Broke affinity for
IRQ30, new: ffff".  Both IRQs are non-descript PCI-MSI/-X interrupts bound to
dom0.

Andrew Cooper (6):
  xen/tasklet: Fix return value truncation on arm64
  xen/tasklet: Switch data parameter from unsigned long to void *.
  xen/domctl: Consolidate hypercall continuation handling at the top level
  xen/hypercall: Cope with -ERESTART on more hypercall paths
  xen/tasklet: Return -ERESTART from continue_hypercall_on_cpu()
  x86/smt: Don't use -EBUSY for smt_up_down_helper() continuations

 xen/arch/arm/traps.c                      |  8 +++++++
 xen/arch/x86/domctl.c                     |  5 ++++-
 xen/arch/x86/hvm/hvm.c                    |  6 ++---
 xen/arch/x86/hvm/vlapic.c                 |  8 +++----
 xen/arch/x86/hypercall.c                  | 14 ++++++++++++
 xen/arch/x86/mm/hap/hap.c                 |  3 +--
 xen/arch/x86/mm/shadow/common.c           |  7 +++---
 xen/arch/x86/platform_hypercall.c         | 14 ++++++++++--
 xen/arch/x86/sysctl.c                     |  9 ++++++--
 xen/common/compat/domain.c                |  9 ++++----
 xen/common/domain.c                       | 37 +++++++++++++++++--------------
 xen/common/domctl.c                       | 19 +++++-----------
 xen/common/kexec.c                        | 20 +++++++++++++----
 xen/common/keyhandler.c                   | 19 ++++++++--------
 xen/common/stop_machine.c                 |  5 +++--
 xen/common/sysctl.c                       | 13 +++++++++--
 xen/common/tasklet.c                      |  6 ++---
 xen/common/trace.c                        |  4 ++--
 xen/drivers/char/console.c                |  4 ++--
 xen/drivers/passthrough/amd/iommu_guest.c |  7 +++---
 xen/drivers/passthrough/amd/iommu_init.c  |  6 ++---
 xen/drivers/passthrough/iommu.c           |  4 ++--
 xen/drivers/passthrough/vtd/iommu.c       |  4 ++--
 xen/include/asm-arm/regs.h                |  2 --
 xen/include/asm-x86/regs.h                |  2 --
 xen/include/asm-x86/shadow.h              |  5 ++---
 xen/include/xen/domain.h                  | 17 +++++++++++---
 xen/include/xen/tasklet.h                 | 10 ++++-----
 28 files changed, 158 insertions(+), 109 deletions(-)

-- 
2.11.0


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