From: Brendan Jackman <jackmanb@google.com>
To: "Roy, Patrick" <roypat@amazon.co.uk>
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Subject: Re: [PATCH v7 05/12] KVM: guest_memfd: Add flag to remove from direct map
Date: Fri, 31 Oct 2025 17:30:12 +0000 [thread overview]
Message-ID: <DDWOP8GKHESP.2EOY2HGM9RXHU@google.com> (raw)
In-Reply-To: <20250924152214.7292-2-roypat@amazon.co.uk>
On Wed Sep 24, 2025 at 3:22 PM UTC, Patrick Roy wrote:
> diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
> index 1d0585616aa3..73a15cade54a 100644
> --- a/include/linux/kvm_host.h
> +++ b/include/linux/kvm_host.h
> @@ -731,6 +731,12 @@ static inline bool kvm_arch_has_private_mem(struct kvm *kvm)
> bool kvm_arch_supports_gmem_mmap(struct kvm *kvm);
> #endif
>
> +#ifdef CONFIG_KVM_GUEST_MEMFD
> +#ifndef kvm_arch_gmem_supports_no_direct_map
> +#define kvm_arch_gmem_supports_no_direct_map can_set_direct_map
> +#endif
> +#endif /* CONFIG_KVM_GUEST_MEMFD */
The test robot seems happy so I think I'm probably mistaken here, but
AFAICS can_set_direct_map only exists when ARCH_HAS_SET_DIRECT_MAP,
which powerpc doesn't set.
If this is indeed an issue I think it can be fixed by just defining
can_set_direct_map() to false when !ARCH_HAS_SET_DIRECT_MAP.
next prev parent reply other threads:[~2025-10-31 17:30 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-24 15:10 [PATCH v7 00/12] Direct Map Removal Support for guest_memfd Patrick Roy
2025-09-24 15:10 ` [PATCH v7 01/12] arch: export set_direct_map_valid_noflush to KVM module Patrick Roy
2025-09-24 15:10 ` [PATCH v7 02/12] x86/tlb: export flush_tlb_kernel_range " Patrick Roy
2025-09-24 15:10 ` [PATCH v7 03/12] mm: introduce AS_NO_DIRECT_MAP Patrick Roy
2025-09-24 15:22 ` [PATCH v7 04/12] KVM: guest_memfd: Add stub for kvm_arch_gmem_invalidate Roy, Patrick
2025-09-24 15:22 ` [PATCH v7 05/12] KVM: guest_memfd: Add flag to remove from direct map Roy, Patrick
2025-09-25 11:00 ` David Hildenbrand
2025-09-25 15:52 ` Roy, Patrick
2025-09-25 19:28 ` David Hildenbrand
2025-09-26 14:49 ` Patrick Roy
2025-10-31 17:30 ` Brendan Jackman [this message]
2025-11-01 9:39 ` Mike Rapoport
2025-09-24 15:22 ` [PATCH v7 06/12] KVM: guest_memfd: add module param for disabling TLB flushing Roy, Patrick
2025-09-25 11:02 ` David Hildenbrand
2025-09-25 15:50 ` Roy, Patrick
2025-09-25 19:32 ` David Hildenbrand
2025-09-25 18:27 ` Dave Hansen
2025-09-25 19:20 ` David Hildenbrand
2025-09-25 19:59 ` Dave Hansen
2025-09-25 20:13 ` David Hildenbrand
2025-09-26 9:46 ` Patrick Roy
2025-09-26 10:53 ` Will Deacon
2025-09-26 20:09 ` David Hildenbrand
2025-09-27 7:38 ` Patrick Roy
2025-09-29 10:20 ` David Hildenbrand
2025-10-11 14:32 ` Patrick Roy
2025-10-30 16:05 ` Brendan Jackman
2025-10-31 18:31 ` Brendan Jackman
2025-09-24 15:22 ` [PATCH v7 07/12] KVM: selftests: load elf via bounce buffer Roy, Patrick
2025-09-24 15:22 ` [PATCH v7 08/12] KVM: selftests: set KVM_MEM_GUEST_MEMFD in vm_mem_add() if guest_memfd != -1 Roy, Patrick
2025-09-24 15:22 ` [PATCH v7 09/12] KVM: selftests: Add guest_memfd based vm_mem_backing_src_types Roy, Patrick
2025-09-24 15:22 ` [PATCH v7 10/12] KVM: selftests: cover GUEST_MEMFD_FLAG_NO_DIRECT_MAP in existing selftests Roy, Patrick
2025-09-24 15:22 ` [PATCH v7 11/12] KVM: selftests: stuff vm_mem_backing_src_type into vm_shape Roy, Patrick
2025-09-24 15:22 ` [PATCH v7 12/12] KVM: selftests: Test guest execution from direct map removed gmem Roy, Patrick
2025-10-30 17:18 ` Brendan Jackman
2025-09-25 10:26 ` [PATCH v7 04/12] KVM: guest_memfd: Add stub for kvm_arch_gmem_invalidate David Hildenbrand
2025-09-25 10:25 ` [PATCH v7 03/12] mm: introduce AS_NO_DIRECT_MAP David Hildenbrand
2025-09-24 15:29 ` [PATCH v7 00/12] Direct Map Removal Support for guest_memfd Roy, Patrick
2025-09-24 15:38 ` David Hildenbrand
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