diff options
| author | Stanislav Kinsburskii <skinsburskii@linux.microsoft.com> | 2025-03-14 12:28:48 -0700 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2025-03-20 21:23:03 +0000 |
| commit | 8cac51796ecb162c437cc651f37152095af76591 (patch) | |
| tree | 327b8d61856c7e00b718dad69340c3cfc00aa9ce | |
| parent | 3817854ba892016ddb03ee31208e9f8e440f5bee (diff) | |
x86/mshyperv: Add support for extended Hyper-V features
Extend the "ms_hyperv_info" structure to include a new field,
"ext_features", for capturing extended Hyper-V features.
Update the "ms_hyperv_init_platform" function to retrieve these features
using the cpuid instruction and include them in the informational output.
Signed-off-by: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>
Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
Reviewed-by: Easwar Hariharan <eahariha@linux.microsoft.com>
Reviewed-by: Roman Kisel <romank@linux.microsoft.com>
Reviewed-by: Tianyu Lan <tiala@microsoft.com>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Link: https://lore.kernel.org/r/1741980536-3865-3-git-send-email-nunodasneves@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <1741980536-3865-3-git-send-email-nunodasneves@linux.microsoft.com>
| -rw-r--r-- | arch/x86/kernel/cpu/mshyperv.c | 6 | ||||
| -rw-r--r-- | include/asm-generic/mshyperv.h | 1 |
2 files changed, 5 insertions, 2 deletions
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index 4f01f424ea5b..fd285b18d6b4 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -434,13 +434,15 @@ static void __init ms_hyperv_init_platform(void) */ ms_hyperv.features = cpuid_eax(HYPERV_CPUID_FEATURES); ms_hyperv.priv_high = cpuid_ebx(HYPERV_CPUID_FEATURES); + ms_hyperv.ext_features = cpuid_ecx(HYPERV_CPUID_FEATURES); ms_hyperv.misc_features = cpuid_edx(HYPERV_CPUID_FEATURES); ms_hyperv.hints = cpuid_eax(HYPERV_CPUID_ENLIGHTMENT_INFO); hv_max_functions_eax = cpuid_eax(HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS); - pr_info("Hyper-V: privilege flags low 0x%x, high 0x%x, hints 0x%x, misc 0x%x\n", - ms_hyperv.features, ms_hyperv.priv_high, ms_hyperv.hints, + pr_info("Hyper-V: privilege flags low %#x, high %#x, ext %#x, hints %#x, misc %#x\n", + ms_hyperv.features, ms_hyperv.priv_high, + ms_hyperv.ext_features, ms_hyperv.hints, ms_hyperv.misc_features); ms_hyperv.max_vp_index = cpuid_eax(HYPERV_CPUID_IMPLEMENT_LIMITS); diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h index 250c65236919..c8043efabf5a 100644 --- a/include/asm-generic/mshyperv.h +++ b/include/asm-generic/mshyperv.h @@ -36,6 +36,7 @@ enum hv_partition_type { struct ms_hyperv_info { u32 features; u32 priv_high; + u32 ext_features; u32 misc_features; u32 hints; u32 nested_features; |