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acpi: add interface to access user-installed tables 

Also add a new API to install builtin tables, so
that we can distinguish between the two.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2013-10-07 14:41:40 +03:00
parent 64e9df8d34
commit 60de1163d5
2 changed files with 44 additions and 0 deletions
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40
hw/acpi/core.c
View File

@ -309,6 +309,46 @@ out:
error_propagate(errp, err);
}
static bool acpi_table_builtin = false;
void acpi_table_add_builtin(const QemuOpts *opts, Error **errp)
{
acpi_table_builtin = true;
acpi_table_add(opts, errp);
}
unsigned acpi_table_len(void *current)
{
struct acpi_table_header *hdr = current - sizeof(hdr->_length);
return hdr->_length;
}
static
void *acpi_table_hdr(void *h)
{
struct acpi_table_header *hdr = h;
return &hdr->sig;
}
uint8_t *acpi_table_first(void)
{
if (acpi_table_builtin || !acpi_tables) {
return NULL;
}
return acpi_table_hdr(acpi_tables + ACPI_TABLE_PFX_SIZE);
}
uint8_t *acpi_table_next(uint8_t *current)
{
uint8_t *next = current + acpi_table_len(current);
if (next - acpi_tables >= acpi_tables_len) {
return NULL;
} else {
return acpi_table_hdr(next);
}
}
static void acpi_notify_wakeup(Notifier *notifier, void *data)
{
ACPIREGS *ar = container_of(notifier, ACPIREGS, wakeup);

4
include/hw/acpi/acpi.h
View File

@ -165,6 +165,10 @@ extern int acpi_enabled;
extern char unsigned *acpi_tables;
extern size_t acpi_tables_len;
uint8_t *acpi_table_first(void);
uint8_t *acpi_table_next(uint8_t *current);
unsigned acpi_table_len(void *current);
void acpi_table_add(const QemuOpts *opts, Error **errp);
void acpi_table_add_builtin(const QemuOpts *opts, Error **errp);
#endif /* !QEMU_HW_ACPI_H */