[tip:x86/paravirt] x86/xen: Move pv irq related functions under CONFIG_XEN_PV umbrella

From: tip-bot for Juergen Gross
Date: Mon Sep 03 2018 - 10:55:21 EST

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Commit-ID: 28c11b0f798c6727355bd44603b16bb04e3a044d
Gitweb: https://git.kernel.org/tip/28c11b0f798c6727355bd44603b16bb04e3a044d
Author: Juergen Gross <jgross@xxxxxxxx>
AuthorDate: Tue, 28 Aug 2018 09:40:12 +0200
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Mon, 3 Sep 2018 16:50:32 +0200

x86/xen: Move pv irq related functions under CONFIG_XEN_PV umbrella

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@xxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Acked-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
Cc: virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
Cc: akataria@xxxxxxxxxx
Cc: rusty@xxxxxxxxxxxxxxx
Cc: hpa@xxxxxxxxx
Link: https://lkml.kernel.org/r/20180828074026.820-2-jgross@xxxxxxxx

---
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 2767c625a52c..9cc4c3064ce0 100644
--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -782,7 +782,7 @@ 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.
@@ -1240,7 +1240,7 @@ 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
@@ -1321,11 +1321,13 @@ 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 957dfb693ecc..a9ec5d3c6e67 100644
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -1050,7 +1050,7 @@ 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

/*
@@ -1130,11 +1130,13 @@ 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 \
@@ -1151,7 +1153,7 @@ 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);

Next message: tip-bot for Juergen Gross: "[tip:x86/paravirt] x86/xen: Move pv specific parts of arch/x86/xen/mmu.c to mmu_pv.c"
Previous message: Dmitry Vyukov: "Re: KMSAN: uninit-value in snd_midi_event_encode_byte"
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