Re: [PATCH v10 00/21] Introduce ACPI for ARM64 based on ACPI 5.1

[Hanjun Guo <guohanjun@huawei.com>]

On 2015/3/21 11:17, Hanjun Guo wrote:
> +CC Parth Dixit, Stefano Stabellini.
>
> On 2015年03月21日 02:54, Will Deacon wrote:
>> On Thu, Mar 19, 2015 at 04:09:33AM +0000, Hanjun Guo wrote:
>>> On 2015/3/19 3:05, Will Deacon wrote:
>>>> If you can get that in place, I'm not opposed to putting this into
>>>> linux-next ahead of the firmware summit in San Jose next week. Note that
>>>> this is not a commitment for 4.1, since I'm keen to see the outcomes of
>>>> next week before setting anything in stone.
>>>
>>> OK, I will stick to this mailing list and respond as soon as I can.
>>
>> This doesn't even build for me:
>>
>>
>> $ make ARCH=arm64 CROSS_COMPILE=aarch64-none-linux-gnu- allmodconfig
>> $ make ARCH=arm64 CROSS_COMPILE=aarch64-none-linux-gnu- Image
>>
>> [...]
>>
>> In file included from drivers/xen/acpi.c:33:0:
>
> Sorry, I didn't build ACPI with XEN enabled on ARM64.
>
>> include/xen/acpi.h: In function ‘xen_acpi_sleep_register’:
>> include/xen/acpi.h:102:3: error: ‘acpi_suspend_lowlevel’ undeclared (first use in this function)
>>     acpi_suspend_lowlevel = xen_acpi_suspend_lowlevel;
>
> acpi_suspend_lowlevel is defined only for X86 and IA64 for now.
>
>>     ^
>> include/xen/acpi.h:102:3: note: each undeclared identifier is reported only once for each function it appears in
>> drivers/xen/acpi.c: In function ‘xen_acpi_notify_hypervisor_state’:
>> drivers/xen/acpi.c:61:2: error: implicit declaration of function ‘HYPERVISOR_dom0_op’ [-Werror=implicit-function-declaration]
>>    HYPERVISOR_dom0_op(&op);
>
> And this is only for x86:
> ./arch/x86/include/asm/xen/hypercall.h:HYPERVISOR_dom0_op(struct xen_platform_op *platform_op)
>
>>    ^
>> cc1: some warnings being treated as errors
>> make[2]: *** [drivers/xen/acpi.o] Error 1
>> make[2]: *** Waiting for unfinished jobs....
>> make[1]: *** [drivers/xen] Error 2
>> make[1]: *** Waiting for unfinished jobs....
>> make: *** [drivers] Error 2
>>
>>
>> Am I missing some other patches?
>
> No, you miss nothing. Parth Dixit is still working on XEN ACPI for
> ARM64, before it's in full function, how about introduce a Kconfig
> CONFIG_XEN_ACPI and let it depends on x86? when XEN ACPI for ARM64
> comes, we can enable ARM64 for CONFIG_XEN_ACPI and fix the problems
> above.
>
> Stefano, Parth, what do you think?

I prepared a patch for further reference:

From 268dcdafa34a690e2f99c0784ca33a6d2352ecf5 Mon Sep 17 00:00:00 2001
From: Hanjun Guo <hanjun.guo@linaro.org>
Date: Sat, 21 Mar 2015 14:43:54 +0800
Subject: [PATCH] XEN / ACPI: Make XEN ACPI depend on X86

When ACPI is enabled on ARM64, XEN ACPI will also compiled
into the kernel, but XEN ACPI is x86 dependent, so introduce
CONFIG_XEN_ACPI to make it depend on x86 before XEN ACPI is
functional on ARM64.

Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
---
 drivers/xen/Kconfig  | 4 ++++
 drivers/xen/Makefile | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index b812462..a31cd29 100644
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -253,4 +253,8 @@ config XEN_EFI
     def_bool y
     depends on X86_64 && EFI
 
+config XEN_ACPI
+    def_bool y
+    depends on X86 && ACPI
+
 endmenu
diff --git a/drivers/xen/Makefile b/drivers/xen/Makefile
index 2ccd359..f4622ab 100644
--- a/drivers/xen/Makefile
+++ b/drivers/xen/Makefile
@@ -13,7 +13,7 @@ CFLAGS_efi.o                += -fshort-wchar
 
 dom0-$(CONFIG_PCI) += pci.o
 dom0-$(CONFIG_USB_SUPPORT) += dbgp.o
-dom0-$(CONFIG_ACPI) += acpi.o $(xen-pad-y)
+dom0-$(CONFIG_XEN_ACPI) += acpi.o $(xen-pad-y)
 xen-pad-$(CONFIG_X86) += xen-acpi-pad.o
 dom0-$(CONFIG_X86) += pcpu.o
 obj-$(CONFIG_XEN_DOM0)            += $(dom0-y)
-- 
1.7.12.4