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x86/hyperv: implement and use hv_smp_prepare_cpus

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Microsoft Hypervisor requires the root partition to make a few
hypercalls to setup application processors before they can be used.

Signed-off-by: Lillian Grassin-Drake <ligrassi@microsoft.com>
Signed-off-by: Sunil Muthuswamy <sunilmut@microsoft.com>
Co-Developed-by: Lillian Grassin-Drake <ligrassi@microsoft.com>
Co-Developed-by: Sunil Muthuswamy <sunilmut@microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20210203150435.27941-11-wei.liu@kernel.org
This commit is contained in:
Wei Liu 2021-02-03 15:04:29 +00:00
parent 86b5ec3552
commit 333abaf5ab
1 changed files with 29 additions and 0 deletions
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29
arch/x86/kernel/cpu/mshyperv.c
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@ -31,6 +31,7 @@
#include <asm/reboot.h> #include <asm/reboot.h>
#include <asm/nmi.h> #include <asm/nmi.h>
#include <clocksource/hyperv_timer.h> #include <clocksource/hyperv_timer.h>
#include <asm/numa.h>
/* Is Linux running as the root partition? */ /* Is Linux running as the root partition? */
bool hv_root_partition; bool hv_root_partition;
@ -230,6 +231,32 @@ static void __init hv_smp_prepare_boot_cpu(void)
hv_init_spinlocks(); hv_init_spinlocks();
#endif #endif
} }
static void __init hv_smp_prepare_cpus(unsigned int max_cpus)
{
#ifdef CONFIG_X86_64
int i;
int ret;
#endif
native_smp_prepare_cpus(max_cpus);
#ifdef CONFIG_X86_64
for_each_present_cpu(i) {
if (i == 0)
continue;
ret = hv_call_add_logical_proc(numa_cpu_node(i), i, cpu_physical_id(i));
BUG_ON(ret);
}
for_each_present_cpu(i) {
if (i == 0)
continue;
ret = hv_call_create_vp(numa_cpu_node(i), hv_current_partition_id, i, i);
BUG_ON(ret);
}
#endif
}
#endif #endif
static void __init ms_hyperv_init_platform(void) static void __init ms_hyperv_init_platform(void)
@ -395,6 +422,8 @@ static void __init ms_hyperv_init_platform(void)
# ifdef CONFIG_SMP # ifdef CONFIG_SMP
smp_ops.smp_prepare_boot_cpu = hv_smp_prepare_boot_cpu; smp_ops.smp_prepare_boot_cpu = hv_smp_prepare_boot_cpu;
if (hv_root_partition)
smp_ops.smp_prepare_cpus = hv_smp_prepare_cpus;
# endif # endif
/* /*