LoongArch: KVM: Add vcpu mapping from physical cpuid

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Physical CPUID is used for interrupt routing for irqchips such as ipi,
msgint and eiointc interrupt controllers. Physical CPUID is stored at
the CSR register LOONGARCH_CSR_CPUID, it can not be changed once vcpu
is created and the physical CPUIDs of two vcpus cannot be the same.

Different irqchips have different size declaration about physical CPUID,
the max CPUID value for CSR LOONGARCH_CSR_CPUID on Loongson-3A5000 is
512, the max CPUID supported by IPI hardware is 1024, while for eiointc
irqchip is 256, and for msgint irqchip is 65536.

The smallest value from all interrupt controllers is selected now, and
the max cpuid size is defines as 256 by KVM which comes from the eiointc
irqchip.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

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This commit is contained in:

Bibo Mao 2024-05-06 22:00:47 +08:00 • committed by Huacai Chen

parent 9753d30379

commit 73516e9da5

4 changed files with 129 additions and 0 deletions

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27

arch/loongarch/include/asm/kvm_host.h

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1

arch/loongarch/include/asm/kvm_vcpu.h

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91

arch/loongarch/kvm/vcpu.c

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10

arch/loongarch/kvm/vm.c

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