From 7e61560628d17ea6b1d8ee370f6d42694cff8758 Mon Sep 17 00:00:00 2001 From: Ulises Mendez Martinez Date: Fri, 4 Sep 2026 15:07:09 +0000 Subject: objtool: Validate disassembler headers in libopcodes probe commit 3f2de814c059 ("objtool: Fix libopcodes linking with static libraries") tested for libopcodes availability by linking a test snippet with a forward declaration of disassemble_init_for_target(). However, testing symbol linkage with an extern declaration only verifies the presence of the library (.so/.a) and bypasses checking for development headers (binutils-dev). On systems where libopcodes is present without development headers installed, the probe succeeds, enabling BUILD_DISAS. Subsequent compilation of objtool then fails: fatal error: 'bfd.h' file not found 113 | #include Additionally, the probe invokes $(HOSTCC) without $(HOSTCFLAGS), ignoring any sysroot or include flags specified for the host compiler. Fix this by including and directly in the test snippet, passing $(HOSTCFLAGS) so host compiler options are respected, and defining PACKAGE="objtool" to satisfy the configuration check in . Fixes: 3f2de814c059 ("objtool: Fix libopcodes linking with static libraries") Fixes: 436326bc525d ("objtool: fix build failure due to missing libopcodes check") Reported-by: Alice Ryhl Assisted-by: Antigravity:Gemini-Next Signed-off-by: Ulises Mendez Martinez Link: https://patch.msgid.link/20260904150710.2997558-1-umendez@google.com Signed-off-by: Josh Poimboeuf --- Documentation/ABI/testing/amdpmf-interface | 73 ++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 Documentation/ABI/testing/amdpmf-interface (limited to 'Documentation/ABI/testing/amdpmf-interface') diff --git a/Documentation/ABI/testing/amdpmf-interface b/Documentation/ABI/testing/amdpmf-interface new file mode 100644 index 000000000..625f90a01 --- /dev/null +++ b/Documentation/ABI/testing/amdpmf-interface @@ -0,0 +1,73 @@ +What: /dev/amdpmf_interface +Date: June 2026 +KernelVersion: 7.2 +Contact: Shyam Sundar S K +Description: + The AMD Platform Management Framework (PMF) util layer exposes a + minimal user-space interface via a character device for feature + discovery and metrics monitoring. + + When CONFIG_AMD_PMF_UTIL_SUPPORT is enabled, the driver creates + a character device: + + ====================== + /dev/amdpmf_interface + ====================== + + The interface supports a single ioctl: + + ============================ ======================================= + IOCTL Usage + IOCTL_AMD_PMF_POPULATE_DATA User passes a struct amd_pmf_info with + the size field set to sizeof(struct + amd_pmf_info). The driver returns all + available metrics and feature status + in the structure. + ============================ ======================================= + + struct amd_pmf_info layout: + + ======================= ========== ================================ + Field Type Description + size __u64 Structure size for versioning + features_supported __u32 Bitmask of supported features + platform_type __u32 Platform form factor orientation + power_source __u32 AC/DC power source + laptop_placement __u32 Device placement state + lid_state __u32 Lid open/closed status + user_presence __u32 User presence detection + slider_position __u32 Current power slider position + skin_temp __s32 Skin temperature (centidegrees) + gfx_busy __u32 Graphics workload percentage + ambient_light __s32 Ambient light sensor reading + avg_c0_residency __u32 Average C0 state residency + max_c0_residency __u32 Maximum C0 state residency + socket_power __u32 Socket power consumption + bios_input[10] __u32 Custom BIOS input parameters + bios_output[10] __u32 Custom BIOS output parameters + ======================= ========== ================================ + + Feature Support Flags (features_supported bitmask): + + ===================================== ==== ============================= + Flag Bit Description + AMD_PMF_FEAT_AUTO_MODE 0 Auto Mode feature support + AMD_PMF_FEAT_STATIC_POWER_SLIDER 1 Static Power Slider support + AMD_PMF_FEAT_POLICY_BUILDER 2 Policy Builder (Smart PC) + AMD_PMF_FEAT_DYNAMIC_POWER_SLIDER_AC 3 Dynamic slider on AC + AMD_PMF_FEAT_DYNAMIC_POWER_SLIDER_DC 4 Dynamic slider on DC + ===================================== ==== ============================= + + Return codes: + + ============= ============================================================ + Return code Description + 0 Success + EINVAL Invalid size or parameter + EFAULT copy_to_user/copy_from_user failures + ENODEV PMF device not available + ENOTTY Unknown ioctl command + ============= ============================================================ + + User-space tools integrating with AMD PMF to discover capabilities and + monitor real-time metrics for thermal and power management validation. -- cgit v1.3.1