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Bug-fixes:

Browse source 
* Fix compile issues on ARM.
  * Fix hypercall fallback code for old hypervisors.
  * Print out which HVM parameter failed if it fails.
  * Fix idle notifier call after irq_enter.
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Merge tag 'stable/for-linus-3.7-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen

Pull Xen fixes from Konrad Rzeszutek Wilk:
 "There are three ARM compile fixes (we forgot to export certain
  functions and if the drivers are built as an module - we go belly-up).

  There is also an mismatch of irq_enter() / exit_idle() calls sequence
  which were fixed some time ago in other piece of codes, but failed to
  appear in the Xen code.

  Lastly a fix for to help in the field with troubleshooting in case we
  cannot get the appropriate parameter and also fallback code when
  working with very old hypervisors."

Bug-fixes:
 - Fix compile issues on ARM.
 - Fix hypercall fallback code for old hypervisors.
 - Print out which HVM parameter failed if it fails.
 - Fix idle notifier call after irq_enter.

* tag 'stable/for-linus-3.7-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/arm: Fix compile errors when drivers are compiled as modules (export more).
  xen/arm: Fix compile errors when drivers are compiled as modules.
  xen/generic: Disable fallback build on ARM.
  xen/events: fix RCU warning, or Call idle notifier after irq_enter()
  xen/hvm: If we fail to fetch an HVM parameter print out which flag it is.
  xen/hypercall: fix hypercall fallback code for very old hypervisors
This commit is contained in:
Linus Torvalds 2012-11-10 06:56:21 +01:00
commit 0020dd0b8c
6 changed files with 132 additions and 17 deletions
Download patch file Download diff file Expand all files Collapse all files

34
include/xen/hvm.h
View file

@ -5,6 +5,36 @@
#include <xen/interface/hvm/params.h>
#include <asm/xen/hypercall.h>
static const char *param_name(int op)
{
#define PARAM(x) [HVM_PARAM_##x] = #x
static const char *const names[] = {
PARAM(CALLBACK_IRQ),
PARAM(STORE_PFN),
PARAM(STORE_EVTCHN),
PARAM(PAE_ENABLED),
PARAM(IOREQ_PFN),
PARAM(BUFIOREQ_PFN),
PARAM(TIMER_MODE),
PARAM(HPET_ENABLED),
PARAM(IDENT_PT),
PARAM(DM_DOMAIN),
PARAM(ACPI_S_STATE),
PARAM(VM86_TSS),
PARAM(VPT_ALIGN),
PARAM(CONSOLE_PFN),
PARAM(CONSOLE_EVTCHN),
};
#undef PARAM
if (op >= ARRAY_SIZE(names))
return "unknown";
if (!names[op])
return "reserved";
return names[op];
}
static inline int hvm_get_parameter(int idx, uint64_t *value)
{
struct xen_hvm_param xhv;
@ -14,8 +44,8 @@ static inline int hvm_get_parameter(int idx, uint64_t *value)
xhv.index = idx;
r = HYPERVISOR_hvm_op(HVMOP_get_param, &xhv);
if (r < 0) {
printk(KERN_ERR "Cannot get hvm parameter %d: %d!\n",
idx, r);
printk(KERN_ERR "Cannot get hvm parameter %s (%d): %d!\n",
param_name(idx), idx, r);
return r;
}
*value = xhv.value;