From: Isaku Yamahata <isaku.yamah...@intel.com>
If SMM is not supported, ACPI fixed hardware doesn't support
legacy-mode. ACPI-only platform. Where SCI_EN in PM1_CNT register is
always set.
The bit tells OS legacy mode(SCI_EN cleared) or ACPI mode(SCI_EN set).
ACPI spec 4.8.10.1 PM1 Event Grouping
PM1 Eanble Registers
> For ACPI-only platforms (where SCI_EN is always set)
Signed-off-by: Isaku Yamahata <isaku.yamah...@intel.com>
---
hw/acpi/core.c | 11 ++++++++++-
hw/acpi/ich9.c | 2 +-
hw/acpi/piix4.c | 3 ++-
hw/isa/vt82c686.c | 2 +-
include/hw/acpi/acpi.h | 4 +++-
5 files changed, 17 insertions(+), 5 deletions(-)
diff --git a/hw/acpi/core.c b/hw/acpi/core.c
index 7170bff657..1e004d0078 100644
--- a/hw/acpi/core.c
+++ b/hw/acpi/core.c
@@ -579,6 +579,10 @@ void acpi_pm1_cnt_update(ACPIREGS *ar,
bool sci_enable, bool sci_disable)
{
/* ACPI specs 3.0, 4.7.2.5 */
+ if (ar->pm1.cnt.acpi_only) {
+ return;
+ }
+
if (sci_enable) {
ar->pm1.cnt.cnt |= ACPI_BITMASK_SCI_ENABLE;
} else if (sci_disable) {
@@ -608,11 +612,13 @@ static const MemoryRegionOps acpi_pm_cnt_ops = {
};
void acpi_pm1_cnt_init(ACPIREGS *ar, MemoryRegion *parent,
- bool disable_s3, bool disable_s4, uint8_t s4_val)
+ bool disable_s3, bool disable_s4, uint8_t s4_val,
+ bool acpi_only)
{
FWCfgState *fw_cfg;
ar->pm1.cnt.s4_val = s4_val;
+ ar->pm1.cnt.acpi_only = acpi_only;
ar->wakeup.notify = acpi_notify_wakeup;
qemu_register_wakeup_notifier(&ar->wakeup);
@@ -638,6 +644,9 @@ void acpi_pm1_cnt_init(ACPIREGS *ar, MemoryRegion *parent,
void acpi_pm1_cnt_reset(ACPIREGS *ar)
{
ar->pm1.cnt.cnt = 0;
+ if (ar->pm1.cnt.acpi_only) {
+ ar->pm1.cnt.cnt |= ACPI_BITMASK_SCI_ENABLE;
+ }
}
/* ACPI GPE */
diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
index 5ff4e01c36..1a34d7f621 100644
--- a/hw/acpi/ich9.c
+++ b/hw/acpi/ich9.c
@@ -282,7 +282,7 @@ void ich9_pm_init(PCIDevice *lpc_pci, ICH9LPCPMRegs *pm,
acpi_pm_tmr_init(&pm->acpi_regs, ich9_pm_update_sci_fn, &pm->io);
acpi_pm1_evt_init(&pm->acpi_regs, ich9_pm_update_sci_fn, &pm->io);
acpi_pm1_cnt_init(&pm->acpi_regs, &pm->io, pm->disable_s3, pm->disable_s4,
- pm->s4_val);
+ pm->s4_val, !smm_enabled);
acpi_gpe_init(&pm->acpi_regs, ICH9_PMIO_GPE0_LEN);
memory_region_init_io(&pm->io_gpe, OBJECT(lpc_pci), &ich9_gpe_ops, pm,
diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index 669be5bbf6..0cddf91de5 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -496,7 +496,8 @@ static void piix4_pm_realize(PCIDevice *dev, Error **errp)
acpi_pm_tmr_init(&s->ar, pm_tmr_timer, &s->io);
acpi_pm1_evt_init(&s->ar, pm_tmr_timer, &s->io);
- acpi_pm1_cnt_init(&s->ar, &s->io, s->disable_s3, s->disable_s4, s->s4_val);
+ acpi_pm1_cnt_init(&s->ar, &s->io, s->disable_s3, s->disable_s4, s->s4_val,
+ !s->smm_enabled);
acpi_gpe_init(&s->ar, GPE_LEN);
s->powerdown_notifier.notify = piix4_pm_powerdown_req;
diff --git a/hw/isa/vt82c686.c b/hw/isa/vt82c686.c
index a6f5a0843d..071b64b497 100644
--- a/hw/isa/vt82c686.c
+++ b/hw/isa/vt82c686.c
@@ -240,7 +240,7 @@ static void vt82c686b_pm_realize(PCIDevice *dev, Error
**errp)
acpi_pm_tmr_init(&s->ar, pm_tmr_timer, &s->io);
acpi_pm1_evt_init(&s->ar, pm_tmr_timer, &s->io);
- acpi_pm1_cnt_init(&s->ar, &s->io, false, false, 2);
+ acpi_pm1_cnt_init(&s->ar, &s->io, false, false, 2, false);
}
static Property via_pm_properties[] = {
diff --git a/include/hw/acpi/acpi.h b/include/hw/acpi/acpi.h
index 22b0b65bb2..9e8a76f2e2 100644
--- a/include/hw/acpi/acpi.h
+++ b/include/hw/acpi/acpi.h
@@ -128,6 +128,7 @@ struct ACPIPM1CNT {
MemoryRegion io;
uint16_t cnt;
uint8_t s4_val;
+ bool acpi_only;
};
struct ACPIGPE {
@@ -163,7 +164,8 @@ void acpi_pm1_evt_init(ACPIREGS *ar, acpi_update_sci_fn
update_sci,
/* PM1a_CNT: piix and ich9 don't implement PM1b CNT. */
void acpi_pm1_cnt_init(ACPIREGS *ar, MemoryRegion *parent,
- bool disable_s3, bool disable_s4, uint8_t s4_val);
+ bool disable_s3, bool disable_s4, uint8_t s4_val,
+ bool acpi_only);
void acpi_pm1_cnt_update(ACPIREGS *ar,
bool sci_enable, bool sci_disable);
void acpi_pm1_cnt_reset(ACPIREGS *ar);
--
2.17.1
