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| author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-10-19 21:01:46 +0200 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-11-07 16:40:33 +0100 |
| commit | 6d877e6b85691e0b2b22e90aeb9b86c3dafcfc6b (patch) | |
| tree | f6902d9a2a84abc7d13203bf18b978f7ef1d16cc /include/xen | |
| parent | xen/hypercall: fix hypercall fallback code for very old hypervisors (diff) | |
| download | linux-6d877e6b85691e0b2b22e90aeb9b86c3dafcfc6b.tar.xz linux-6d877e6b85691e0b2b22e90aeb9b86c3dafcfc6b.zip | |
xen/hvm: If we fail to fetch an HVM parameter print out which flag it is.
Makes it easier to troubleshoot in the field.
Acked-by: Ian Campbell <ian.campbell@citrix.com>
[v1: Use macro per Ian's suggestion]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'include/xen')
| -rw-r--r-- | include/xen/hvm.h | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/include/xen/hvm.h b/include/xen/hvm.h index b193fa2f9fdd..13e43e41637d 100644 --- a/include/xen/hvm.h +++ b/include/xen/hvm.h @@ -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; |