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564ea84c8c
Dump TD configuration on boot. Attributes and TD_CTLS define TD behavior. This information is useful for tracking down bugs. The output ends up looking like this in practice: [ 0.000000] tdx: Guest detected [ 0.000000] tdx: Attributes: SEPT_VE_DISABLE [ 0.000000] tdx: TD_CTLS: PENDING_VE_DISABLE ENUM_TOPOLOGY VIRT_CPUID2 REDUCE_VE Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Nikolay Borisov <nik.borisov@suse.com> Link: https://lore.kernel.org/all/20241202072458.447455-1-kirill.shutemov%40linux.intel.com
69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#undef pr_fmt
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#define pr_fmt(fmt) "tdx: " fmt
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#include <linux/array_size.h>
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#include <linux/printk.h>
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#include <asm/tdx.h>
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#define DEF_TDX_ATTR_NAME(_name) [TDX_ATTR_##_name##_BIT] = __stringify(_name)
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static __initdata const char *tdx_attributes[] = {
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DEF_TDX_ATTR_NAME(DEBUG),
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DEF_TDX_ATTR_NAME(HGS_PLUS_PROF),
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DEF_TDX_ATTR_NAME(PERF_PROF),
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DEF_TDX_ATTR_NAME(PMT_PROF),
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DEF_TDX_ATTR_NAME(ICSSD),
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DEF_TDX_ATTR_NAME(LASS),
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DEF_TDX_ATTR_NAME(SEPT_VE_DISABLE),
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DEF_TDX_ATTR_NAME(MIGRTABLE),
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DEF_TDX_ATTR_NAME(PKS),
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DEF_TDX_ATTR_NAME(KL),
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DEF_TDX_ATTR_NAME(TPA),
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DEF_TDX_ATTR_NAME(PERFMON),
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};
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#define DEF_TD_CTLS_NAME(_name) [TD_CTLS_##_name##_BIT] = __stringify(_name)
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static __initdata const char *tdcs_td_ctls[] = {
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DEF_TD_CTLS_NAME(PENDING_VE_DISABLE),
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DEF_TD_CTLS_NAME(ENUM_TOPOLOGY),
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DEF_TD_CTLS_NAME(VIRT_CPUID2),
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DEF_TD_CTLS_NAME(REDUCE_VE),
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DEF_TD_CTLS_NAME(LOCK),
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};
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void __init tdx_dump_attributes(u64 td_attr)
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{
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pr_info("Attributes:");
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for (int i = 0; i < ARRAY_SIZE(tdx_attributes); i++) {
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if (!tdx_attributes[i])
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continue;
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if (td_attr & BIT(i))
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pr_cont(" %s", tdx_attributes[i]);
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td_attr &= ~BIT(i);
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}
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if (td_attr)
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pr_cont(" unknown:%#llx", td_attr);
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pr_cont("\n");
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}
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void __init tdx_dump_td_ctls(u64 td_ctls)
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{
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pr_info("TD_CTLS:");
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for (int i = 0; i < ARRAY_SIZE(tdcs_td_ctls); i++) {
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if (!tdcs_td_ctls[i])
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continue;
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if (td_ctls & BIT(i))
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pr_cont(" %s", tdcs_td_ctls[i]);
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td_ctls &= ~BIT(i);
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}
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if (td_ctls)
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pr_cont(" unknown:%#llx", td_ctls);
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pr_cont("\n");
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}
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