| Message ID | d26581b7e58de3bc36998df1f5b854171946ce9a.1613436967.git.isaku.yamahata@intel.com |
|---|---|
| State | New |
| Headers | show |
| Series | ACPI related fixes to comform the spec better | expand |
On Mon, 15 Feb 2021 17:04:09 -0800 isaku.yamahata@gmail.com wrote: > From: Isaku Yamahata <isaku.yamahata@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). > > With the next patch (setting fadt.smi_cmd = 0 when smm isn't enabled), > guest Linux tries to switch to ACPI mode, finds smi_cmd = 0, and then > fails to initialize acpi subsystem. This patch proactively fixes it. > > This patch changes guest ABI. To keep compatibility, use > "x-smm-compat-5" introduced by earlier patch. > If the property is true, disable new behavior. > > 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.yamahata@intel.com> Reviewed-by: Igor Mammedov <imammedo@redhat.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..853447cf9d 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, !pm->smm_compat && !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 30dd9b2309..1efc0ded9f 100644 > --- a/hw/acpi/piix4.c > +++ b/hw/acpi/piix4.c > @@ -497,7 +497,8 @@ 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_compat && !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);
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..853447cf9d 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, !pm->smm_compat && !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 30dd9b2309..1efc0ded9f 100644 --- a/hw/acpi/piix4.c +++ b/hw/acpi/piix4.c @@ -497,7 +497,8 @@ 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_compat && !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);