[PATCH 04/32] ACPI: sleep: Update acpi_set_firmware_waking_vector() invocations to favor 32-bit firmware waking vector.

Lv Zheng
2015-06-19T03:39:12Z

This patch updates acpi_set_firmware_waking_vector() invocations in order
to keep 32-bit firmware waking vector favor for Linux.

64-bit firmware waking vector has never been enabled by Linux. The
(acpi_physical_address)0 for 64-bit address can be used to force ACPICA to
set only 32-bit firmware waking vector for Linux.

Reference: https://bugzilla.kernel.org/show_bug.cgi?id=74021
Reported-and-tested-by: Oswald Buddenhagen <ossi@kde.org>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: linux-ia64@vger.kernel.org
---
arch/ia64/include/asm/acpi.h | 3 ++-
arch/ia64/kernel/acpi.c | 2 --
arch/x86/include/asm/acpi.h | 3 ++-
drivers/acpi/sleep.c | 8 ++++++--
4 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/arch/ia64/include/asm/acpi.h b/arch/ia64/include/asm/acpi.h
index aa0fdf1..0ac4fab 100644
--- a/arch/ia64/include/asm/acpi.h
+++ b/arch/ia64/include/asm/acpi.h
@@ -79,7 +79,8 @@ int acpi_gsi_to_irq (u32 gsi, unsigned int *irq);
/* Low-level suspend routine. */
extern int acpi_suspend_lowlevel(void);

-extern unsigned long acpi_wakeup_address;
+#define acpi_wakeup_address ((acpi_physical_address)0)
+#define acpi_wakeup_address64 ((acpi_physical_address)0)

/*
* Record the cpei override flag and current logical cpu. This is
diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c
index b1698bc..1b08d6f 100644
--- a/arch/ia64/kernel/acpi.c
+++ b/arch/ia64/kernel/acpi.c
@@ -60,8 +60,6 @@ int acpi_lapic;
unsigned int acpi_cpei_override;
unsigned int acpi_cpei_phys_cpuid;

-unsigned long acpi_wakeup_address = 0;
-
#ifdef CONFIG_IA64_GENERIC
static unsigned long __init acpi_find_rsdp(void)
{
diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
index 3a45668..fc9608d 100644
--- a/arch/x86/include/asm/acpi.h
+++ b/arch/x86/include/asm/acpi.h
@@ -72,7 +72,8 @@ static inline void acpi_disable_pci(void)
extern int (*acpi_suspend_lowlevel)(void);

/* Physical address to resume after wakeup */
-#define acpi_wakeup_address ((unsigned long)(real_mode_header->wakeup_start))
+#define acpi_wakeup_address ((acpi_physical_address)(real_mode_header->wakeup_start))
+#define acpi_wakeup_address64 ((acpi_physical_address)(0))

/*
* Check if the CPU can handle C2 and deeper
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 2f0d4db..3a6a2eb 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -25,6 +25,8 @@
#include "internal.h"
#include "sleep.h"

+#define ACPI_NO_WAKING_VECTOR ((acpi_physical_address)0)
+
static u8 sleep_states[ACPI_S_STATE_COUNT];

static void acpi_sleep_tts_switch(u32 acpi_state)
@@ -61,7 +63,8 @@ static int acpi_sleep_prepare(u32 acpi_state)
if (acpi_state == ACPI_STATE_S3) {
if (!acpi_wakeup_address)
return -EFAULT;
- acpi_set_firmware_waking_vector(acpi_wakeup_address);
+ acpi_set_firmware_waking_vector(acpi_wakeup_address,
+ acpi_wakeup_address64);

}
ACPI_FLUSH_CPU_CACHE();
@@ -410,7 +413,8 @@ static void acpi_pm_finish(void)
acpi_leave_sleep_state(acpi_state);

/* reset firmware waking vector */
- acpi_set_firmware_waking_vector((acpi_physical_address) 0);
+ acpi_set_firmware_waking_vector(ACPI_NO_WAKING_VECTOR,
+ ACPI_NO_WAKING_VECTOR);

acpi_target_sleep_state = ACPI_STATE_S0;

--
1.7.10