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Peter Anvin" , Kiryl Shutsemau Subject: [PATCH v4 06/10] x86/virt/tdx: Convert the handoff metadata reader Date: Mon, 12 Oct 2026 02:47:33 -0700 Message-ID: <20261012094754.27702-7-chao.gao@intel.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20261012094754.27702-1-chao.gao@intel.com> References: <20261012094754.27702-1-chao.gao@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Continue converting the metadata readers to the table-driven helper. Add a table that pairs each field ID with the 'struct tdx_sys_info_handoff' member that holds its value, and read all fields by walking that table. AI was used under supervision to review code and workshop logs Signed-off-by: Chao Gao Reviewed-by: Rick Edgecombe --- v4: - Collect tags [Rick] - Drop per-class macros [Nikolay, Dave] --- arch/x86/virt/vmx/tdx/tdx.c | 6 +++++- arch/x86/virt/vmx/tdx/tdx.h | 3 +++ arch/x86/virt/vmx/tdx/tdx_global_metadata.c | 13 ------------- 3 files changed, 8 insertions(+), 14 deletions(-) diff --git a/arch/x86/virt/vmx/tdx/tdx.c b/arch/x86/virt/vmx/tdx/tdx.c index bd0c8359eb55..ebf9d4d721e1 100644 --- a/arch/x86/virt/vmx/tdx/tdx.c +++ b/arch/x86/virt/vmx/tdx/tdx.c @@ -467,6 +467,10 @@ static const struct field_mapping td_ctrl_mappings[] __initconst = { FIELD_MAP(TDX_FIELD_TDVPS_BASE_SIZE, td_ctrl, tdvps_base_size), }; +static const struct field_mapping handoff_mappings[] = { + FIELD_MAP(TDX_FIELD_MODULE_HV, handoff, module_hv), +}; + #include "tdx_global_metadata.c" static __init int check_features(struct tdx_sys_info *sysinfo) @@ -1394,7 +1398,7 @@ int tdx_module_shutdown(void) int ret; int cpu; - ret = get_tdx_sys_info_handoff(&handoff); + ret = read_sys_metadata_table(handoff_mappings, &handoff); /* * Handoff information is required for proper * shutdown. Refuse to shut down without it. diff --git a/arch/x86/virt/vmx/tdx/tdx.h b/arch/x86/virt/vmx/tdx/tdx.h index 8bd8928c1802..720e301f599e 100644 --- a/arch/x86/virt/vmx/tdx/tdx.h +++ b/arch/x86/virt/vmx/tdx/tdx.h @@ -78,6 +78,9 @@ #define TDX_FIELD_TDCS_BASE_SIZE 0x9800000100000100ULL #define TDX_FIELD_TDVPS_BASE_SIZE 0x9800000100000200ULL +/* Class "TDX Module Handoff" */ +#define TDX_FIELD_MODULE_HV 0x8900000100000000ULL + /* TDX page types */ #define PT_NDA 0x0 #define PT_RSVD 0x1 diff --git a/arch/x86/virt/vmx/tdx/tdx_global_metadata.c b/arch/x86/virt/vmx/tdx/tdx_global_metadata.c index 6025421874cd..f1aeccd08027 100644 --- a/arch/x86/virt/vmx/tdx/tdx_global_metadata.c +++ b/arch/x86/virt/vmx/tdx/tdx_global_metadata.c @@ -40,19 +40,6 @@ static __init int get_tdx_sys_info_td_conf(struct tdx_sys_info_td_conf *sysinfo_ return ret; } -static int get_tdx_sys_info_handoff(struct tdx_sys_info_handoff *sysinfo_handoff) -{ - int ret; - u64 val; - - ret = read_sys_metadata_field(0x8900000100000000, &val); - if (ret) - return ret; - - sysinfo_handoff->module_hv = val; - return 0; -} - static __init int get_tdx_sys_info(struct tdx_sys_info *sysinfo) { int ret = 0; -- 2.52.0