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drivers: hv: Allow vmbus message synic interrupt injected from Hyper-V 

When Secure AVIC is enabled, VMBus driver should
call x2apic Secure AVIC interface to allow Hyper-V
to inject VMBus message interrupt.

Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Reviewed-by: Neeraj Upadhyay <Neeraj.Upadhyay@amd.com>
Signed-off-by: Tianyu Lan <tiala@microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
This commit is contained in:
Tianyu Lan 2025-09-18 11:00:20 -04:00 committed by Wei Liu
parent f34f5e576f
commit 3e1b611515
4 changed files with 13 additions and 0 deletions
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5
arch/x86/hyperv/hv_apic.c
View File

@ -53,6 +53,11 @@ static void hv_apic_icr_write(u32 low, u32 id)
wrmsrq(HV_X64_MSR_ICR, reg_val);
}
void hv_enable_coco_interrupt(unsigned int cpu, unsigned int vector, bool set)
{
apic_update_vector(cpu, vector, set);
}
static u32 hv_apic_read(u32 reg)
{
u32 reg_val, hi;

2
drivers/hv/hv.c
View File

@ -307,6 +307,7 @@ void hv_synic_enable_regs(unsigned int cpu)
}
hv_set_msr(HV_MSR_SIEFP, siefp.as_uint64);
hv_enable_coco_interrupt(cpu, vmbus_interrupt, true);
/* Setup the shared SINT. */
if (vmbus_irq != -1)
@ -350,6 +351,7 @@ void hv_synic_disable_regs(unsigned int cpu)
/* Need to correctly cleanup in the case of SMP!!! */
/* Disable the interrupt */
hv_set_msr(HV_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
hv_enable_coco_interrupt(cpu, vmbus_interrupt, false);
simp.as_uint64 = hv_get_msr(HV_MSR_SIMP);
/*

5
drivers/hv/hv_common.c
View File

@ -716,6 +716,11 @@ u64 __weak hv_tdx_hypercall(u64 control, u64 param1, u64 param2)
}
EXPORT_SYMBOL_GPL(hv_tdx_hypercall);
void __weak hv_enable_coco_interrupt(unsigned int cpu, unsigned int vector, bool set)
{
}
EXPORT_SYMBOL_GPL(hv_enable_coco_interrupt);
void hv_identify_partition_type(void)
{
/* Assume guest role */

1
include/asm-generic/mshyperv.h
View File

@ -347,6 +347,7 @@ bool hv_is_isolation_supported(void);
bool hv_isolation_type_snp(void);
u64 hv_ghcb_hypercall(u64 control, void *input, void *output, u32 input_size);
u64 hv_tdx_hypercall(u64 control, u64 param1, u64 param2);
void hv_enable_coco_interrupt(unsigned int cpu, unsigned int vector, bool set);
void hyperv_cleanup(void);
bool hv_query_ext_cap(u64 cap_query);
void hv_setup_dma_ops(struct device *dev, bool coherent);