Ben Guthro
2013-Jun-27 15:02 UTC
[PATCH v4 5/5] xen/acpi: notify xen when reduced hardware sleep is available
Make use of acpi_os_prepare_sleep extended parameter to notify xen
to make use of the reduced hardware sleep functionality
The hypervisor change underlying this is commit 62d1a69 ("ACPI: support
v5 (reduced HW) sleep interface") on the master branch of
git://xenbits.xen.org/xen.git.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Ben Guthro <benjamin.guthro@citrix.com>
Cc: Konrad Wilk <konrad.wilk@oracle.com>
---
drivers/xen/acpi.c | 26 +++++++++++++-------------
include/xen/acpi.h | 4 ++--
include/xen/interface/platform.h | 7 ++++---
3 files changed, 19 insertions(+), 18 deletions(-)
diff --git a/drivers/xen/acpi.c b/drivers/xen/acpi.c
index 119d42a..371dade 100644
--- a/drivers/xen/acpi.c
+++ b/drivers/xen/acpi.c
@@ -35,27 +35,27 @@
#include <asm/xen/hypercall.h>
#include <asm/xen/hypervisor.h>
-int xen_acpi_notify_hypervisor_state(u8 sleep_state,
- u32 pm1a_cnt, u32 pm1b_cnt)
+int xen_acpi_notify_hypervisor_state(u8 sleep_state, u32 val_a, u32 val_b,
+ bool extended)
{
+ unsigned int bits = extended ? 8 : 16;
+
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,
- },
+ .u.enter_acpi_sleep = {
+ .val_a = (u16)val_a,
+ .val_b = (u16)val_b,
+ .sleep_state = sleep_state,
+ .flags = extended ? XENPF_ACPI_SLEEP_EXTENDED : 0,
},
};
- if ((pm1a_cnt & 0xffff0000) || (pm1b_cnt & 0xffff0000)) {
- WARN(1, "Using more than 16bits of PM1A/B 0x%x/0x%x!"
- "Email xen-devel@lists.xensource.com Thank you.\n", \
- pm1a_cnt, pm1b_cnt);
+ if (WARN((val_a & (~0 << bits)) || (val_b & (~0 << bits)),
+ "Using more than %u bits of sleep control values %#x/%#x!"
+ "Email xen-devel@lists.xen.org - Thank you.\n", \
+ bits, val_a, val_b))
return -1;
- }
HYPERVISOR_dom0_op(&op);
return 1;
diff --git a/include/xen/acpi.h b/include/xen/acpi.h
index 68d73d0..a2d5667 100644
--- a/include/xen/acpi.h
+++ b/include/xen/acpi.h
@@ -75,8 +75,8 @@ static inline int xen_acpi_get_pxm(acpi_handle h)
return -ENXIO;
}
-int xen_acpi_notify_hypervisor_state(u8 sleep_state,
- u32 pm1a_cnt, u32 pm1b_cnd);
+int xen_acpi_notify_hypervisor_state(u8 sleep_state, u32 val_a, u32 val_b,
+ bool extended);
static inline void xen_acpi_sleep_register(void)
{
diff --git a/include/xen/interface/platform.h b/include/xen/interface/platform.h
index c57d5f6..f1331e3 100644
--- a/include/xen/interface/platform.h
+++ b/include/xen/interface/platform.h
@@ -152,10 +152,11 @@ DEFINE_GUEST_HANDLE_STRUCT(xenpf_firmware_info_t);
#define XENPF_enter_acpi_sleep 51
struct xenpf_enter_acpi_sleep {
/* IN variables */
- uint16_t pm1a_cnt_val; /* PM1a control value. */
- uint16_t pm1b_cnt_val; /* PM1b control value. */
+ uint16_t val_a; /* PM1a control / sleep type A. */
+ uint16_t val_b; /* PM1b control / sleep type B. */
uint32_t sleep_state; /* Which state to enter (Sn). */
- uint32_t flags; /* Must be zero. */
+#define XENPF_ACPI_SLEEP_EXTENDED 0x00000001
+ uint32_t flags; /* XENPF_ACPI_SLEEP_*. */
};
DEFINE_GUEST_HANDLE_STRUCT(xenpf_enter_acpi_sleep_t);
--
1.7.9.5