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| author | Nuno Das Neves <nunodasneves@linux.microsoft.com> | 2024-03-07 15:03:38 -0800 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2024-03-12 05:17:50 +0000 |
| commit | 410779d8d81fcfb45f839238dc6505af5357f5b8 (patch) | |
| tree | 6d47316c02a7329bda4f46ac49e6a34a5697942f /arch/arm64 | |
| parent | 2b4b90e053a29057fb05ba81acce26bddce8d404 (diff) | |
| download | lwn-410779d8d81fcfb45f839238dc6505af5357f5b8.tar.gz lwn-410779d8d81fcfb45f839238dc6505af5357f5b8.zip | |
mshyperv: Introduce hv_get_hypervisor_version function
Introduce x86_64 and arm64 functions to get the hypervisor version
information and store it in a structure for simpler parsing.
Use the new function to get and parse the version at boot time. While at
it, move the printing code to hv_common_init() so it is not duplicated.
Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
Acked-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Link: https://lore.kernel.org/r/1709852618-29110-1-git-send-email-nunodasneves@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <1709852618-29110-1-git-send-email-nunodasneves@linux.microsoft.com>
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/hyperv/mshyperv.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/arch/arm64/hyperv/mshyperv.c b/arch/arm64/hyperv/mshyperv.c index f1b8a04ee9f2..99362716ac87 100644 --- a/arch/arm64/hyperv/mshyperv.c +++ b/arch/arm64/hyperv/mshyperv.c @@ -19,10 +19,17 @@ static bool hyperv_initialized; +int hv_get_hypervisor_version(union hv_hypervisor_version_info *info) +{ + hv_get_vpreg_128(HV_REGISTER_HYPERVISOR_VERSION, + (struct hv_get_vp_registers_output *)info); + + return 0; +} + static int __init hyperv_init(void) { struct hv_get_vp_registers_output result; - u32 a, b, c, d; u64 guest_id; int ret; @@ -54,15 +61,6 @@ static int __init hyperv_init(void) ms_hyperv.features, ms_hyperv.priv_high, ms_hyperv.hints, ms_hyperv.misc_features); - /* Get information about the Hyper-V host version */ - hv_get_vpreg_128(HV_REGISTER_HYPERVISOR_VERSION, &result); - a = result.as32.a; - b = result.as32.b; - c = result.as32.c; - d = result.as32.d; - pr_info("Hyper-V: Host Build %d.%d.%d.%d-%d-%d\n", - b >> 16, b & 0xFFFF, a, d & 0xFFFFFF, c, d >> 24); - ret = hv_common_init(); if (ret) return ret; |