diff options
Diffstat (limited to 'arch/x86/virt/vmx')
| -rw-r--r-- | arch/x86/virt/vmx/tdx/tdx.c | 43 | ||||
| -rw-r--r-- | arch/x86/virt/vmx/tdx/tdx.h | 2 |
2 files changed, 44 insertions, 1 deletions
diff --git a/arch/x86/virt/vmx/tdx/tdx.c b/arch/x86/virt/vmx/tdx/tdx.c index 98283f728a81..5146503233c0 100644 --- a/arch/x86/virt/vmx/tdx/tdx.c +++ b/arch/x86/virt/vmx/tdx/tdx.c @@ -24,6 +24,8 @@ #include <linux/pfn.h> #include <linux/align.h> #include <linux/sort.h> +#include <linux/log2.h> +#include <asm/page.h> #include <asm/msr-index.h> #include <asm/msr.h> #include <asm/cpufeature.h> @@ -892,6 +894,41 @@ static int construct_tdmrs(struct list_head *tmb_list, return ret; } +static int config_tdx_module(struct tdmr_info_list *tdmr_list, u64 global_keyid) +{ + struct tdx_module_args args = {}; + u64 *tdmr_pa_array; + size_t array_sz; + int i, ret; + + /* + * TDMRs are passed to the TDX module via an array of physical + * addresses of each TDMR. The array itself also has certain + * alignment requirement. + */ + array_sz = tdmr_list->nr_consumed_tdmrs * sizeof(u64); + array_sz = roundup_pow_of_two(array_sz); + if (array_sz < TDMR_INFO_PA_ARRAY_ALIGNMENT) + array_sz = TDMR_INFO_PA_ARRAY_ALIGNMENT; + + tdmr_pa_array = kzalloc(array_sz, GFP_KERNEL); + if (!tdmr_pa_array) + return -ENOMEM; + + for (i = 0; i < tdmr_list->nr_consumed_tdmrs; i++) + tdmr_pa_array[i] = __pa(tdmr_entry(tdmr_list, i)); + + args.rcx = __pa(tdmr_pa_array); + args.rdx = tdmr_list->nr_consumed_tdmrs; + args.r8 = global_keyid; + ret = seamcall_prerr(TDH_SYS_CONFIG, &args); + + /* Free the array as it is not required anymore. */ + kfree(tdmr_pa_array); + + return ret; +} + static int init_tdx_module(void) { struct tdx_tdmr_sysinfo tdmr_sysinfo; @@ -927,10 +964,14 @@ static int init_tdx_module(void) if (ret) goto err_free_tdmrs; + /* Pass the TDMRs and the global KeyID to the TDX module */ + ret = config_tdx_module(&tdx_tdmr_list, tdx_global_keyid); + if (ret) + goto err_free_pamts; + /* * TODO: * - * - Configure the TDMRs and the global KeyID to the TDX module. * - Configure the global KeyID on all packages. * - Initialize all TDMRs. * diff --git a/arch/x86/virt/vmx/tdx/tdx.h b/arch/x86/virt/vmx/tdx/tdx.h index 1b04efece9db..fa5bcf8b5a9c 100644 --- a/arch/x86/virt/vmx/tdx/tdx.h +++ b/arch/x86/virt/vmx/tdx/tdx.h @@ -17,6 +17,7 @@ #define TDH_SYS_INIT 33 #define TDH_SYS_RD 34 #define TDH_SYS_LP_INIT 35 +#define TDH_SYS_CONFIG 45 /* * Global scope metadata field ID. @@ -53,6 +54,7 @@ struct tdmr_reserved_area { } __packed; #define TDMR_INFO_ALIGNMENT 512 +#define TDMR_INFO_PA_ARRAY_ALIGNMENT 512 struct tdmr_info { u64 base; |