diff options
Diffstat (limited to 'sys/x86/xen/hvm.c')
| -rw-r--r-- | sys/x86/xen/hvm.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/sys/x86/xen/hvm.c b/sys/x86/xen/hvm.c index a8b14fd..3569cd0 100644 --- a/sys/x86/xen/hvm.c +++ b/sys/x86/xen/hvm.c @@ -134,9 +134,29 @@ xen_hvm_init_hypercall_stubs(enum xen_hvm_init_type init_type) return (ENXIO); if (init_type == XEN_HVM_INIT_COLD) { + int major, minor; + do_cpuid(base + 1, regs); - printf("XEN: Hypervisor version %d.%d detected.\n", - regs[0] >> 16, regs[0] & 0xffff); + + major = regs[0] >> 16; + minor = regs[0] & 0xffff; + printf("XEN: Hypervisor version %d.%d detected.\n", major, + minor); + + if (((major < 4) || (major == 4 && minor <= 5)) && + msix_disable_migration == -1) { + /* + * Xen hypervisors prior to 4.6.0 do not properly + * handle updates to enabled MSI-X table entries, + * so disable MSI-X interrupt migration in that + * case. + */ + if (bootverbose) + printf( +"Disabling MSI-X interrupt migration due to Xen hypervisor bug.\n" +"Set machdep.msix_disable_migration=0 to forcefully enable it.\n"); + msix_disable_migration = 1; + } } /* |
