diff options
author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-12-08 09:32:23 (GMT) |
---|---|---|
committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-05-07 19:33:18 (GMT) |
commit | 211063dc159695bd6072c5393e9bc729481c6ede (patch) | |
tree | 913d21f96fd18746f480701ee45baafab5f114d2 /drivers/xen/acpi.c | |
parent | 1ff2b0c303698e486f1e0886b4d9876200ef8ca5 (diff) | |
download | linux-211063dc159695bd6072c5393e9bc729481c6ede.tar.xz |
xen/acpi/sleep: Enable ACPI sleep via the __acpi_os_prepare_sleep
Provide the registration callback to call in the Xen's
ACPI sleep functionality. This means that during S3/S5
we make a hypercall XENPF_enter_acpi_sleep with the
proper PM1A/PM1B registers.
Based of Ke Yu's <ke.yu@intel.com> initial idea.
[ From http://xenbits.xensource.com/linux-2.6.18-xen.hg
change c68699484a65 ]
[v1: Added Copyright and license]
[v2: Added check if PM1A/B the 16-bits MSB contain something. The spec
only uses 16-bits but might have more in future]
Signed-off-by: Liang Tang <liang.tang@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/xen/acpi.c')
-rw-r--r-- | drivers/xen/acpi.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/xen/acpi.c b/drivers/xen/acpi.c new file mode 100644 index 0000000..119d42a --- /dev/null +++ b/drivers/xen/acpi.c @@ -0,0 +1,62 @@ +/****************************************************************************** + * acpi.c + * acpi file for domain 0 kernel + * + * Copyright (c) 2011 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> + * Copyright (c) 2011 Yu Ke ke.yu@intel.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation; or, when distributed + * separately from the Linux kernel or incorporated into other + * software packages, subject to the following license: + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this source file (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, modify, + * merge, publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#include <xen/acpi.h> +#include <xen/interface/platform.h> +#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) +{ + 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, + }, + }, + }; + + 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); + return -1; + } + + HYPERVISOR_dom0_op(&op); + return 1; +} |