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| author | Isaku Yamahata <isaku.yamahata@intel.com> | 2021-02-17 21:51:12 -0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2021-02-23 10:58:42 -0500 |
| commit | 6be8cf56bc8bda2ed9a070bdb04446191f31acc9 (patch) | |
| tree | 653991a53ad2e88f6386fbbe4f9daabe2a6d4d7f /include/hw | |
| parent | 24cd04fce06b0d54e5ca2c12f20f714894a78b95 (diff) | |
| download | focaccia-qemu-6be8cf56bc8bda2ed9a070bdb04446191f31acc9.tar.gz focaccia-qemu-6be8cf56bc8bda2ed9a070bdb04446191f31acc9.zip | |
acpi/core: always set SCI_EN when SMM isn't supported
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 "smm-compat" 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) Reviewed-by: Igor Mammedov <imammedo@redhat.com> Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com> Message-Id: <500f62081626997e46f96377393d3662211763a8.1613615732.git.isaku.yamahata@intel.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/hw')
| -rw-r--r-- | include/hw/acpi/acpi.h | 4 |
1 files changed, 3 insertions, 1 deletions
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); |