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Message-ID: <CAEvNRgEhcTE70RLiQo2C_XUdF31qSkQ6yHwpUiXPWb6+6mmA0A@mail.gmail.com>
Date: Thu, 15 Jan 2026 13:48:08 -0800
From: Ackerley Tng <ackerleytng@...gle.com>
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Subject: Re: [PATCH v9 05/13] KVM: x86: define kvm_arch_gmem_supports_no_direct_map()
"Kalyazin, Nikita" <kalyazin@...zon.co.uk> writes:
> From: Patrick Roy <patrick.roy@...ux.dev>
>
> x86 supports GUEST_MEMFD_FLAG_NO_DIRECT_MAP whenever direct map
> modifications are possible (which is always the case).
>
> Signed-off-by: Patrick Roy <patrick.roy@...ux.dev>
> Signed-off-by: Nikita Kalyazin <kalyazin@...zon.com>
> ---
> arch/x86/include/asm/kvm_host.h | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> index 5a3bfa293e8b..68bd29a52f24 100644
> --- a/arch/x86/include/asm/kvm_host.h
> +++ b/arch/x86/include/asm/kvm_host.h
> @@ -28,6 +28,7 @@
> #include <linux/sched/vhost_task.h>
> #include <linux/call_once.h>
> #include <linux/atomic.h>
> +#include <linux/set_memory.h>
>
> #include <asm/apic.h>
> #include <asm/pvclock-abi.h>
> @@ -2481,4 +2482,12 @@ static inline bool kvm_arch_has_irq_bypass(void)
> return enable_device_posted_irqs;
> }
>
> +#ifdef CONFIG_KVM_GUEST_MEMFD
> +static inline bool kvm_arch_gmem_supports_no_direct_map(void)
> +{
> + return can_set_direct_map();
> +}
> +#define kvm_arch_gmem_supports_no_direct_map kvm_arch_gmem_supports_no_direct_map
> +#endif /* CONFIG_KVM_GUEST_MEMFD */
> +
> #endif /* _ASM_X86_KVM_HOST_H */
> --
> 2.50.1
Reviewed-by: Ackerley Tng <ackerleytng@...gle.com>
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