https://bugzilla.kernel.org/show_bug.cgi?id=220249
Bug ID: 220249
Summary: ACPI load tables failed when CONFIG_PCI is disabled
Product: ACPI
Version: 2.5
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P3
Component: ACPICA-Core
Assignee: acpi_acpica-c...@kernel-bugs.osdl.org
Reporter: jingyule...@gmail.com
Regression: No
Created attachment 308292
--> https://bugzilla.kernel.org/attachment.cgi?id=308292&action=edit
Linux kernel ACPI boot log
Bug Description:
When CONFIG_PCI is disabled, acpi_ev_install_space_handler() fails for PCI
configuration space (space_id = 2/ACPI_ADR_SPACE_PCI_CONFIG)
Detailed Observation:
As shown in the attached screenshot, acpi_ev_install_space_handler() returns an
error when handling space_id 2 (ACPI_ADR_SPACE_PCI_CONFIG) with CONFIG_PCI=n.
Root Cause Analysis:
The ACPI_PCI_CONFIGURED macro controls access to the PCI configuration space.
Historical commit records confirm that this functionality explicitly depends on
CONFIG_PCI being enabled in the kernel configuration.
Expected Behavior:
The system should either:
1. Handle this case gracefully when CONFIG_PCI is disabled, or
2. Provide clear compile-time checks/runtime warnings about the dependency
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