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bhyve: add helper func to write a dsdt entry

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The guest will check the dsdt to detect acpi devices. Therefore, add a
helper function to create such a dsdt entry for an acpi device.

Reviewed by:		markj
MFC after:		1 week
Sponsored by:		Beckhoff Automation GmbH & Co. KG
Differential Revision:	https://reviews.freebsd.org/D38329
This commit is contained in:
Corvin Köhne 2021-10-07 15:58:27 +02:00
parent 13a1df5b85
commit 682a522d61
No known key found for this signature in database
GPG Key ID: D854DA56315E026A
2 changed files with 48 additions and 0 deletions
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46
usr.sbin/bhyve/acpi_device.c
View File

@ -10,6 +10,7 @@
#include <machine/vmm.h>
#include <assert.h>
#include <err.h>
#include <errno.h>
#include <vmmapi.h>
@ -135,3 +136,48 @@ acpi_device_add_res_fixed_memory32(struct acpi_device *const dev,
return (0);
}
static void
acpi_device_write_dsdt_crs(const struct acpi_device *const dev)
{
const struct acpi_resource_list_entry *res;
SLIST_FOREACH(res, &dev->crs, chain) {
switch (res->type) {
case ACPI_RESOURCE_TYPE_FIXED_IO:
dsdt_fixed_ioport(res->data.FixedIo.Address,
res->data.FixedIo.AddressLength);
break;
case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
dsdt_fixed_mem32(res->data.FixedMemory32.Address,
res->data.FixedMemory32.AddressLength);
break;
default:
assert(0);
break;
}
}
}
void
acpi_device_write_dsdt(const struct acpi_device *const dev)
{
if (dev == NULL) {
return;
}
dsdt_line("");
dsdt_line(" Scope (\\_SB)");
dsdt_line(" {");
dsdt_line(" Device (%s)", dev->name);
dsdt_line(" {");
dsdt_line(" Name (_HID, \"%s\")", dev->hid);
dsdt_line(" Name (_STA, 0x0F)");
dsdt_line(" Name (_CRS, ResourceTemplate ()");
dsdt_line(" {");
dsdt_indent(4);
acpi_device_write_dsdt_crs(dev);
dsdt_unindent(4);
dsdt_line(" })");
dsdt_line(" }");
dsdt_line(" }");
}

2
usr.sbin/bhyve/acpi_device.h
View File

@ -34,3 +34,5 @@ int acpi_device_add_res_fixed_ioport(struct acpi_device *const dev,
const UINT16 port, UINT8 length);
int acpi_device_add_res_fixed_memory32(struct acpi_device *const dev,
const UINT8 write_protected, const UINT32 address, const UINT32 length);
void acpi_device_write_dsdt(const struct acpi_device *const dev);