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SubjectRe: [PATCH v2] xen: move pv irq related functions under CONFIG_XEN_PV umbrella
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On 08/08/18 17:13, Boris Ostrovsky wrote:
> x86 maintainers, this needs you ack too even though it has "xen" tag in
> the subject, thanks.

Ping?


Juergen

>
>
> On 08/08/2018 02:19 AM, Juergen Gross wrote:
>> All functions in arch/x86/xen/irq.c and arch/x86/xen/xen-asm*.S are
>> specific to PV guests. Include them in the kernel with
>> CONFIG_XEN_PV only.
>>
>> Make the PV specific code in arch/x86/entry/entry_*.S dependent on
>> CONFIG_XEN_PV instead of CONFIG_XEN.
>>
>> The HVM specific code should depend on CONFIG_XEN_PVHVM.
>>
>> While at it reformat the Makefile to make it more readable.
>>
>> Signed-off-by: Juergen Gross <jgross@suse.com>
>
>
> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
>
>
>> ---
>> arch/x86/entry/entry_32.S | 8 +++++---
>> arch/x86/entry/entry_64.S | 8 +++++---
>> arch/x86/xen/Makefile | 41 +++++++++++++++++++++++++++++++----------
>> include/xen/events.h | 2 ++
>> 4 files changed, 43 insertions(+), 16 deletions(-)
>>
>> diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S
>> index c371bfee137a..cc4ec4fd58d2 100644
>> --- a/arch/x86/entry/entry_32.S
>> +++ b/arch/x86/entry/entry_32.S
>> @@ -369,7 +369,7 @@ GLOBAL(__begin_SYSENTER_singlestep_region)
>> * will ignore all of the single-step traps generated in this range.
>> */
>>
>> -#ifdef CONFIG_XEN
>> +#ifdef CONFIG_XEN_PV
>> /*
>> * Xen doesn't set %esp to be precisely what the normal SYSENTER
>> * entry point expects, so fix it up before using the normal path.
>> @@ -807,7 +807,7 @@ ENTRY(spurious_interrupt_bug)
>> jmp common_exception
>> END(spurious_interrupt_bug)
>>
>> -#ifdef CONFIG_XEN
>> +#ifdef CONFIG_XEN_PV
>> ENTRY(xen_hypervisor_callback)
>> pushl $-1 /* orig_ax = -1 => not a system call */
>> SAVE_ALL
>> @@ -888,11 +888,13 @@ ENTRY(xen_failsafe_callback)
>> _ASM_EXTABLE(3b, 8b)
>> _ASM_EXTABLE(4b, 9b)
>> ENDPROC(xen_failsafe_callback)
>> +#endif /* CONFIG_XEN_PV */
>>
>> +#ifdef CONFIG_XEN_PVHVM
>> BUILD_INTERRUPT3(xen_hvm_callback_vector, HYPERVISOR_CALLBACK_VECTOR,
>> xen_evtchn_do_upcall)
>> +#endif
>>
>> -#endif /* CONFIG_XEN */
>>
>> #if IS_ENABLED(CONFIG_HYPERV)
>>
>> diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S
>> index 8ae7ffda8f98..3c2526e24dd8 100644
>> --- a/arch/x86/entry/entry_64.S
>> +++ b/arch/x86/entry/entry_64.S
>> @@ -1049,7 +1049,7 @@ ENTRY(do_softirq_own_stack)
>> ret
>> ENDPROC(do_softirq_own_stack)
>>
>> -#ifdef CONFIG_XEN
>> +#ifdef CONFIG_XEN_PV
>> idtentry hypervisor_callback xen_do_hypervisor_callback has_error_code=0
>>
>> /*
>> @@ -1129,11 +1129,13 @@ ENTRY(xen_failsafe_callback)
>> ENCODE_FRAME_POINTER
>> jmp error_exit
>> END(xen_failsafe_callback)
>> +#endif /* CONFIG_XEN_PV */
>>
>> +#ifdef CONFIG_XEN_PVHVM
>> apicinterrupt3 HYPERVISOR_CALLBACK_VECTOR \
>> xen_hvm_callback_vector xen_evtchn_do_upcall
>> +#endif
>>
>> -#endif /* CONFIG_XEN */
>>
>> #if IS_ENABLED(CONFIG_HYPERV)
>> apicinterrupt3 HYPERVISOR_CALLBACK_VECTOR \
>> @@ -1150,7 +1152,7 @@ idtentry debug do_debug has_error_code=0 paranoid=1 shift_ist=DEBUG_STACK
>> idtentry int3 do_int3 has_error_code=0
>> idtentry stack_segment do_stack_segment has_error_code=1
>>
>> -#ifdef CONFIG_XEN
>> +#ifdef CONFIG_XEN_PV
>> idtentry xennmi do_nmi has_error_code=0
>> idtentry xendebug do_debug has_error_code=0
>> idtentry xenint3 do_int3 has_error_code=0
>> diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile
>> index d83cb5478f54..f723b5aa8f74 100644
>> --- a/arch/x86/xen/Makefile
>> +++ b/arch/x86/xen/Makefile
>> @@ -12,25 +12,46 @@ endif
>> # Make sure early boot has no stackprotector
>> nostackp := $(call cc-option, -fno-stack-protector)
>> CFLAGS_enlighten_pv.o := $(nostackp)
>> -CFLAGS_mmu_pv.o := $(nostackp)
>> +CFLAGS_mmu_pv.o := $(nostackp)
>>
>> -obj-y := enlighten.o multicalls.o mmu.o irq.o \
>> - time.o xen-asm.o xen-asm_$(BITS).o \
>> - grant-table.o suspend.o platform-pci-unplug.o
>> +obj-y += enlighten.o
>> +obj-y += multicalls.o
>> +obj-y += mmu.o
>> +obj-y += time.o
>> +obj-y += grant-table.o
>> +obj-y += suspend.o
>> +obj-y += platform-pci-unplug.o
>>
>> -obj-$(CONFIG_XEN_PVHVM) += enlighten_hvm.o mmu_hvm.o suspend_hvm.o
>> -obj-$(CONFIG_XEN_PV) += setup.o apic.o pmu.o suspend_pv.o \
>> - p2m.o enlighten_pv.o mmu_pv.o
>> -obj-$(CONFIG_XEN_PVH) += enlighten_pvh.o
>> +obj-$(CONFIG_XEN_PVHVM) += enlighten_hvm.o
>> +obj-$(CONFIG_XEN_PVHVM) += mmu_hvm.o
>> +obj-$(CONFIG_XEN_PVHVM) += suspend_hvm.o
>>
>> -obj-$(CONFIG_EVENT_TRACING) += trace.o
>> +obj-$(CONFIG_XEN_PV) += setup.o
>> +obj-$(CONFIG_XEN_PV) += apic.o
>> +obj-$(CONFIG_XEN_PV) += pmu.o
>> +obj-$(CONFIG_XEN_PV) += suspend_pv.o
>> +obj-$(CONFIG_XEN_PV) += p2m.o
>> +obj-$(CONFIG_XEN_PV) += enlighten_pv.o
>> +obj-$(CONFIG_XEN_PV) += mmu_pv.o
>> +obj-$(CONFIG_XEN_PV) += irq.o
>> +obj-$(CONFIG_XEN_PV) += xen-asm.o
>> +obj-$(CONFIG_XEN_PV) += xen-asm_$(BITS).o
>> +
>> +obj-$(CONFIG_XEN_PVH) += enlighten_pvh.o
>> +obj-$(CONFIG_XEN_PVH) += xen-pvh.o
>> +
>> +obj-$(CONFIG_EVENT_TRACING) += trace.o
>>
>> obj-$(CONFIG_SMP) += smp.o
>> obj-$(CONFIG_XEN_PV_SMP) += smp_pv.o
>> obj-$(CONFIG_XEN_PVHVM_SMP) += smp_hvm.o
>> +
>> obj-$(CONFIG_PARAVIRT_SPINLOCKS)+= spinlock.o
>> +
>> obj-$(CONFIG_XEN_DEBUG_FS) += debugfs.o
>> +
>> obj-$(CONFIG_XEN_DOM0) += vga.o
>> +
>> obj-$(CONFIG_SWIOTLB_XEN) += pci-swiotlb-xen.o
>> +
>> obj-$(CONFIG_XEN_EFI) += efi.o
>> -obj-$(CONFIG_XEN_PVH) += xen-pvh.o
>> diff --git a/include/xen/events.h b/include/xen/events.h
>> index c3e6bc643a7b..a48897199975 100644
>> --- a/include/xen/events.h
>> +++ b/include/xen/events.h
>> @@ -89,11 +89,13 @@ unsigned irq_from_evtchn(unsigned int evtchn);
>> int irq_from_virq(unsigned int cpu, unsigned int virq);
>> unsigned int evtchn_from_irq(unsigned irq);
>>
>> +#ifdef CONFIG_XEN_PVHVM
>> /* Xen HVM evtchn vector callback */
>> void xen_hvm_callback_vector(void);
>> #ifdef CONFIG_TRACING
>> #define trace_xen_hvm_callback_vector xen_hvm_callback_vector
>> #endif
>> +#endif
>> int xen_set_callback_via(uint64_t via);
>> void xen_evtchn_do_upcall(struct pt_regs *regs);
>> void xen_hvm_evtchn_do_upcall(void);
>
>

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