[PATCH v3 61/62] arm/acpi: Add acpi parameter to enable/disable acpi
shannon.zhao at linaro.org
shannon.zhao at linaro.org
Tue Nov 17 01:41:00 PST 2015
From: Parth Dixit <parth.dixit at linaro.org>
ACPI will be disabled by default. Define new command line parameter
"acpi" for enabling it.
Signed-off-by: Parth Dixit <parth.dixit at linaro.org>
Signed-off-by: Shannon Zhao <shannon.zhao at linaro.org>
---
xen/arch/arm/setup.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c
index 63feadf..1a40323 100644
--- a/xen/arch/arm/setup.c
+++ b/xen/arch/arm/setup.c
@@ -59,6 +59,10 @@ static unsigned long opt_xenheap_megabytes __initdata;
integer_param("xenheap_megabytes", opt_xenheap_megabytes);
#endif
+/* "acpi=force" : Enables acpi */
+static void parse_acpi_param(char *s);
+custom_param("acpi", parse_acpi_param);
+
static __used void init_done(void)
{
free_init_memory();
@@ -84,6 +88,23 @@ static const char * __initdata processor_implementers[] = {
['i'] = "Intel Corporation",
};
+static char __initdata acpi_param[10] = "";
+static void __init parse_acpi_param(char *s)
+{
+ /* Save the parameter so it can be propagated to domain0. */
+ safe_strcpy(acpi_param, s);
+
+ /* Interpret the parameter for use within Xen. */
+ if ( !parse_bool(s) )
+ {
+ disable_acpi();
+ }
+ else if ( !strcmp(s, "force") )
+ {
+ acpi_disabled = 0;
+ }
+}
+
static void __init processor_id(void)
{
const char *implementer = "Unknown";
@@ -729,6 +750,7 @@ void __init start_xen(unsigned long boot_phys_offset,
+ (fdt_paddr & ((1 << SECOND_SHIFT) - 1));
fdt_size = boot_fdt_info(device_tree_flattened, fdt_paddr);
+ disable_acpi();
cmdline = boot_fdt_cmdline(device_tree_flattened);
printk("Command line: %s\n", cmdline);
cmdline_parse(cmdline);
--
2.1.0
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