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| author | Tianyu Lan <tiala@microsoft.com> | 2023-08-18 06:29:17 -0400 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2023-08-22 00:38:20 +0000 |
| commit | 44676bb9d566ce2bfbd132f9745eb7eb2d784476 (patch) | |
| tree | 0c258b796b3f341697304d45dbb1575e06848235 /arch/x86/kernel | |
| parent | 45f46b1ac95ea34cc6e81739a64cb6bec28f1185 (diff) | |
| download | linux-44676bb9d566ce2bfbd132f9745eb7eb2d784476.tar.gz linux-44676bb9d566ce2bfbd132f9745eb7eb2d784476.tar.bz2 linux-44676bb9d566ce2bfbd132f9745eb7eb2d784476.zip | |
x86/hyperv: Add smp support for SEV-SNP guest
In the AMD SEV-SNP guest, AP needs to be started up via sev es
save area and Hyper-V requires to call HVCALL_START_VP hypercall
to pass the gpa of sev es save area with AP's vp index and VTL(Virtual
trust level) parameters. Override wakeup_secondary_cpu_64 callback
with hv_snp_boot_ap.
Reviewed-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Tianyu Lan <tiala@microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Link: https://lore.kernel.org/r/20230818102919.1318039-8-ltykernel@gmail.com
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/cpu/mshyperv.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index 5398fb2f4d39..c56fc151b8db 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -295,6 +295,15 @@ static void __init hv_smp_prepare_cpus(unsigned int max_cpus) native_smp_prepare_cpus(max_cpus); + /* + * Override wakeup_secondary_cpu_64 callback for SEV-SNP + * enlightened guest. + */ + if (hv_isolation_type_en_snp()) { + apic->wakeup_secondary_cpu_64 = hv_snp_boot_ap; + return; + } + #ifdef CONFIG_X86_64 for_each_present_cpu(i) { if (i == 0) @@ -502,7 +511,7 @@ static void __init ms_hyperv_init_platform(void) # ifdef CONFIG_SMP smp_ops.smp_prepare_boot_cpu = hv_smp_prepare_boot_cpu; - if (hv_root_partition) + if (hv_root_partition || hv_isolation_type_en_snp()) smp_ops.smp_prepare_cpus = hv_smp_prepare_cpus; # endif |