The code to call acpi_notify_hypervisor_state() was conditional upon
CONFIG_ACPI_PV_SLEEP, which isn't necessarily set when CONFIG_XEN
is. Therefore, the conditional needed to be converted to CONFIG_XEN,
and consequently the implementation of the function needed to move
out of sleep-xen.c (which doesn't always get build without
CONFIG_ACPI_SLEEP). So without the change, and without
CONFIG_ACPI_PV_SLEEP, the native power off code was used, which
didn't work on that particular machine (including Xen versions pre-dating
S3 support, where the problem wouldn't have been easily fixable at all).
Jan
>>> Keir Fraser <keir.fraser@xxxxxxxxxxxxx> 04.04.08 13:55 >>>
The patch seems to mostly move code around. What does it actually fix, and
how?
-- Keir
On 4/4/08 12:44, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:
> Dell's Precision490, for example, fails to properly power off without
> going through the full sequence of operations in the hypervisor.
>
> Also fix a compiler warning and the improper use of a hypervisor
> return value as ACPI status.
>
> As usual, written and tested on 2.6.25-rc8 and 2.6.16.60 and made apply
> to the 2.6.18 tree without further testing.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
>
> Index: sle10sp2-2008-03-31/arch/i386/kernel/acpi/sleep-xen.c
> ===================================================================
> --- sle10sp2-2008-03-31.orig/arch/i386/kernel/acpi/sleep-xen.c 2008-04-04
> 11:12:58.000000000 +0200
> +++ sle10sp2-2008-03-31/arch/i386/kernel/acpi/sleep-xen.c 2008-04-04
> 11:14:46.000000000 +0200
> @@ -110,25 +110,4 @@ static int __init acpisleep_dmi_init(voi
> }
>
> core_initcall(acpisleep_dmi_init);
> -
> -#else /* CONFIG_ACPI_PV_SLEEP */
> -#include <asm/hypervisor.h>
> -#include <xen/interface/platform.h>
> -int acpi_notify_hypervisor_state(u8 sleep_state,
> - u32 pm1a_cnt, u32 pm1b_cnt)
> -{
> - struct xen_platform_op op = {
> - .cmd = XENPF_enter_acpi_sleep,
> - .interface_version = XENPF_INTERFACE_VERSION,
> - .u = {
> - .enter_acpi_sleep = {
> - .pm1a_cnt_val = (u16)pm1a_cnt,
> - .pm1b_cnt_val = (u16)pm1b_cnt,
> - .sleep_state = sleep_state,
> - },
> - },
> - };
> -
> - return HYPERVISOR_platform_op(&op);
> -}
> #endif /* CONFIG_ACPI_PV_SLEEP */
> Index: sle10sp2-2008-03-31/arch/x86_64/kernel/acpi/sleep-xen.c
> ===================================================================
> --- sle10sp2-2008-03-31.orig/arch/x86_64/kernel/acpi/sleep-xen.c 2008-04-04
> 11:12:58.000000000 +0200
> +++ sle10sp2-2008-03-31/arch/x86_64/kernel/acpi/sleep-xen.c 2008-04-04
> 11:15:23.000000000 +0200
> @@ -137,29 +137,6 @@ static int __init acpi_sleep_setup(char
> }
>
> __setup("acpi_sleep=", acpi_sleep_setup);
> -
> -#else /* CONFIG_ACPI_PV_SLEEP */
> -#include <asm/hypervisor.h>
> -#include <xen/interface/platform.h>
> -int acpi_notify_hypervisor_state(u8 sleep_state,
> - u32 pm1a_cnt, u32 pm1b_cnt)
> -{
> - struct xen_platform_op op = {
> - .cmd = XENPF_enter_acpi_sleep,
> - .interface_version = XENPF_INTERFACE_VERSION,
> - .u = {
> - .enter_acpi_sleep = {
> - .pm1a_cnt_val = (u16)pm1a_cnt,
> - .pm1b_cnt_val = (u16)pm1b_cnt,
> - .sleep_state = sleep_state,
> - },
> - },
> - };
> -
> - return HYPERVISOR_platform_op(&op);
> -}
> -#endif /* CONFIG_ACPI_PV_SLEEP */
> -
> #endif /*CONFIG_ACPI_SLEEP */
>
> void acpi_pci_link_exit(void)
> Index: sle10sp2-2008-03-31/drivers/acpi/hardware/hwsleep.c
> ===================================================================
> --- sle10sp2-2008-03-31.orig/drivers/acpi/hardware/hwsleep.c 2008-04-04
> 11:12:58.000000000 +0200
> +++ sle10sp2-2008-03-31/drivers/acpi/hardware/hwsleep.c 2008-04-04
> 11:16:18.000000000 +0200
> @@ -227,7 +227,11 @@ acpi_status asmlinkage acpi_enter_sleep_
> u32 PM1Bcontrol;
> struct acpi_bit_register_info *sleep_type_reg_info;
> struct acpi_bit_register_info *sleep_enable_reg_info;
> +#ifndef CONFIG_XEN
> u32 in_value;
> +#else
> + int err;
> +#endif
> acpi_status status;
>
> ACPI_FUNCTION_TRACE(acpi_enter_sleep_state);
> @@ -327,7 +329,7 @@ acpi_status asmlinkage acpi_enter_sleep_
>
> ACPI_FLUSH_CPU_CACHE();
>
> -#ifndef CONFIG_ACPI_PV_SLEEP
> +#ifndef CONFIG_XEN
> status = acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
> ACPI_REGISTER_PM1A_CONTROL,
> PM1Acontrol);
> @@ -377,17 +379,18 @@ acpi_status asmlinkage acpi_enter_sleep_
> /* Spin until we wake */
>
> } while (!in_value);
> -
> - return_ACPI_STATUS(AE_OK);
> #else
> /* PV ACPI just need check hypercall return value */
> - status = acpi_notify_hypervisor_state(sleep_state,
> + err = acpi_notify_hypervisor_state(sleep_state,
> PM1Acontrol, PM1Bcontrol);
> - if (ACPI_FAILURE(status))
> - return_ACPI_STATUS(status);
> - else
> - return_ACPI_STATUS(AE_OK);
> + if (err) {
> + ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
> + "Hypervisor failure [%d]\n", err));
> + return_ACPI_STATUS(AE_ERROR);
> + }
> #endif
> +
> + return_ACPI_STATUS(AE_OK);
> }
>
> ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state)
> Index: sle10sp2-2008-03-31/include/asm-i386/acpi.h
> ===================================================================
> --- sle10sp2-2008-03-31.orig/include/asm-i386/acpi.h 2007-12-10
> 11:30:46.000000000 +0100
> +++ sle10sp2-2008-03-31/include/asm-i386/acpi.h 2008-04-04 11:21:10.000000000
> +0200
> @@ -31,6 +31,9 @@
> #include <acpi/pdc_intel.h>
>
> #include <asm/system.h> /* defines cmpxchg */
> +#ifdef CONFIG_XEN
> +#include <xen/interface/platform.h>
> +#endif
>
> #define COMPILER_DEPENDENT_INT64 long long
> #define COMPILER_DEPENDENT_UINT64 unsigned long long
> @@ -154,6 +157,27 @@ static inline void acpi_disable_pci(void
> }
> extern int acpi_irq_balance_set(char *str);
>
> +#ifdef CONFIG_XEN
> +static inline int acpi_notify_hypervisor_state(u8 sleep_state,
> + u32 pm1a_cnt_val,
> + u32 pm1b_cnt_val)
> +{
> + struct xen_platform_op op = {
> + .cmd = XENPF_enter_acpi_sleep,
> + .interface_version = XENPF_INTERFACE_VERSION,
> + .u = {
> + .enter_acpi_sleep = {
> + .pm1a_cnt_val = pm1a_cnt_val,
> + .pm1b_cnt_val = pm1b_cnt_val,
> + .sleep_state = sleep_state,
> + },
> + },
> + };
> +
> + return HYPERVISOR_platform_op(&op);
> +}
> +#endif /* CONFIG_XEN */
> +
> #else /* !CONFIG_ACPI */
>
> #define acpi_lapic 0
> @@ -175,10 +199,6 @@ extern unsigned long acpi_wakeup_address
> /* early initialization routine */
> extern void acpi_reserve_bootmem(void);
>
> -#ifdef CONFIG_ACPI_PV_SLEEP
> -extern int acpi_notify_hypervisor_state(u8 sleep_state,
> - u32 pm1a_cnt, u32 pm1b_cnt);
> -#endif /* CONFIG_ACPI_PV_SLEEP */
> #endif /*CONFIG_ACPI_SLEEP*/
>
> extern u8 x86_acpiid_to_apicid[];
> Index: sle10sp2-2008-03-31/include/asm-x86_64/acpi.h
> ===================================================================
> --- sle10sp2-2008-03-31.orig/include/asm-x86_64/acpi.h 2008-01-31
> 11:23:28.000000000 +0100
> +++ sle10sp2-2008-03-31/include/asm-x86_64/acpi.h 2008-04-04
> 11:20:51.000000000 +0200
> @@ -28,6 +28,9 @@
>
> #ifdef __KERNEL__
>
> +#ifdef CONFIG_XEN
> +#include <xen/interface/platform.h>
> +#endif
> #include <acpi/pdc_intel.h>
>
> #define COMPILER_DEPENDENT_INT64 long long
> @@ -129,6 +132,27 @@ static inline void acpi_disable_pci(void
> }
> extern int acpi_irq_balance_set(char *str);
>
> +#ifdef CONFIG_XEN
> +static inline int acpi_notify_hypervisor_state(u8 sleep_state,
> + u32 pm1a_cnt_val,
> + u32 pm1b_cnt_val)
> +{
> + struct xen_platform_op op = {
> + .cmd = XENPF_enter_acpi_sleep,
> + .interface_version = XENPF_INTERFACE_VERSION,
> + .u = {
> + .enter_acpi_sleep = {
> + .pm1a_cnt_val = pm1a_cnt_val,
> + .pm1b_cnt_val = pm1b_cnt_val,
> + .sleep_state = sleep_state,
> + },
> + },
> + };
> +
> + return HYPERVISOR_platform_op(&op);
> +}
> +#endif /* CONFIG_XEN */
> +
> #else /* !CONFIG_ACPI */
>
> #define acpi_lapic 0
> @@ -152,11 +176,6 @@ extern unsigned long acpi_wakeup_address
>
> /* early initialization routine */
> extern void acpi_reserve_bootmem(void);
> -
> -#ifdef CONFIG_ACPI_PV_SLEEP
> -extern int acpi_notify_hypervisor_state(u8 sleep_state,
> - u32 pm1a_cnt, u32 pm1b_cnt);
> -#endif /* CONFIG_ACPI_PV_SLEEP */
> #endif /*CONFIG_ACPI_SLEEP*/
>
> #define boot_cpu_physical_apicid boot_cpu_id
>
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
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