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Re: [XEN PATCH v1 1/7] x86/vpmu: separate amd/intel vPMU code
- To: Sergiy Kibrik <Sergiy_Kibrik@xxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 29 Apr 2024 17:28:52 +0200
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- Cc: Roger Pau Monné <roger.pau@xxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Mon, 29 Apr 2024 15:29:01 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 23.04.2024 10:48, Sergiy Kibrik wrote:
> --- a/xen/arch/x86/include/asm/vpmu.h
> +++ b/xen/arch/x86/include/asm/vpmu.h
> @@ -11,6 +11,7 @@
> #define __ASM_X86_HVM_VPMU_H_
>
> #include <public/pmu.h>
> +#include <xen/err.h>
>
> #define vcpu_vpmu(vcpu) (&(vcpu)->arch.vpmu)
> #define vpmu_vcpu(vpmu) container_of((vpmu), struct vcpu, arch.vpmu)
> @@ -42,9 +43,27 @@ struct arch_vpmu_ops {
> #endif
> };
>
> +#ifdef CONFIG_INTEL
> const struct arch_vpmu_ops *core2_vpmu_init(void);
> +#else
> +static inline const struct arch_vpmu_ops *core2_vpmu_init(void)
> +{
> + return ERR_PTR(-ENODEV);
> +}
> +#endif
> +#ifdef CONFIG_AMD
> const struct arch_vpmu_ops *amd_vpmu_init(void);
> const struct arch_vpmu_ops *hygon_vpmu_init(void);
> +#else
> +static inline const struct arch_vpmu_ops *amd_vpmu_init(void)
> +{
> + return ERR_PTR(-ENODEV);
> +}
> +static inline const struct arch_vpmu_ops *hygon_vpmu_init(void)
> +{
> + return ERR_PTR(-ENODEV);
> +}
> +#endif
Any reason you don't follow the approach used in patch 7, putting simple
#ifdef in the switch() in vpmu_init()? That would avoid the need for the
three almost identical stubs.
Jan
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