From d40402e0425a48cc92022e0525fdddb2069c23bb Mon Sep 17 00:00:00 2001 From: Rebecca Cran Date: Mon, 30 Sep 2024 07:59:45 -0600 Subject: [PATCH] Silicon/Ampere: Set EFI_ACPI_6_3_LOW_POWER_S0_IDLE_CAPABLE in FADT Set the EFI_ACPI_6_3_LOW_POWER_S0_IDLE_CAPABLE flag in the FADT. The ACPI specification says the LOW_POWER_S0_IDLE_CAPABLE flag means that the platform is able to achieve power savings in S0 similar to or better than those typically in S3. It effectively means that the system will not achieve any power savings by transitioning to S3. Since Altra doesn't support the S3 state, set this flag. This resolves the FWTS S0idleNoFADT error. Signed-off-by: Rebecca Cran --- Silicon/Ampere/AmpereAltraPkg/AcpiCommonTables/Fadt.aslc | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/Silicon/Ampere/AmpereAltraPkg/AcpiCommonTables/Fadt.aslc b/Silicon/Ampere/AmpereAltraPkg/AcpiCommonTables/Fadt.aslc index 5be828f1cdf..82090ad4772 100644 --- a/Silicon/Ampere/AmpereAltraPkg/AcpiCommonTables/Fadt.aslc +++ b/Silicon/Ampere/AmpereAltraPkg/AcpiCommonTables/Fadt.aslc @@ -14,7 +14,8 @@ // This macro defines the FADT flag options. // #define FADT_FLAGS (EFI_ACPI_6_3_HW_REDUCED_ACPI | \ - EFI_ACPI_6_3_PWR_BUTTON) + EFI_ACPI_6_3_PWR_BUTTON | \ + EFI_ACPI_6_3_LOW_POWER_S0_IDLE_CAPABLE) EFI_ACPI_6_3_FIXED_ACPI_DESCRIPTION_TABLE Fadt = {