From: K. Y. Srinivasan Date: Fri, 8 Sep 2017 23:15:57 +0000 (-0700) Subject: x86/hyper-V: Allocate the IDT entry early in boot X-Git-Tag: microblaze-4.14-rc3~37^2~1 X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=213ff44ae4eb5224010166db2f851e4eea068268;p=linux-2.6-microblaze.git x86/hyper-V: Allocate the IDT entry early in boot Allocate the hypervisor callback IDT entry early in the boot sequence. The previous code would allocate the entry as part of registering the handler when the vmbus driver loaded, and this caused a problem for the IDT cleanup that Thomas is working on for v4.15. Signed-off-by: K. Y. Srinivasan Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: apw@canonical.com Cc: devel@linuxdriverproject.org Cc: gregkh@linuxfoundation.org Cc: jasowang@redhat.com Cc: olaf@aepfle.de Link: http://lkml.kernel.org/r/20170908231557.2419-1-kys@exchange.microsoft.com Signed-off-by: Ingo Molnar --- diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index 3b3f713e15e5..236324e83a3a 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -59,8 +59,6 @@ void hyperv_vector_handler(struct pt_regs *regs) void hv_setup_vmbus_irq(void (*handler)(void)) { vmbus_handler = handler; - /* Setup the IDT for hypervisor callback */ - alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, hyperv_callback_vector); } void hv_remove_vmbus_irq(void) @@ -251,6 +249,8 @@ static void __init ms_hyperv_init_platform(void) */ x86_platform.apic_post_init = hyperv_init; hyperv_setup_mmu_ops(); + /* Setup the IDT for hypervisor callback */ + alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, hyperv_callback_vector); #endif }