linux-kernel - [PATCH] KVM: arm64: nv: select XARRAY

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Date:   Wed, 16 Aug 2023 14:09:49 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     linux-kernel@...r.kernel.org
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        Marc Zyngier <maz@...nel.org>,
        Oliver Upton <oliver.upton@...ux.dev>, kvmarm@...ts.linux.dev,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH] KVM: arm64: nv: select XARRAY_MULTI to fix build error

populate_nv_trap_config() uses xa_store_range(), which is only built
when XARRAY_MULTI is set, so select that symbol to prevent the build error.

aarch64-linux-ld: arch/arm64/kvm/emulate-nested.o: in function `populate_nv_trap_config':
emulate-nested.c:(.init.text+0x17c): undefined reference to `xa_store_range'

Fixes: d15fe1b2d2cc ("KVM: arm64: nv: Add trap forwarding infrastructure")
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Marc Zyngier <maz@...nel.org>
Cc: Oliver Upton <oliver.upton@...ux.dev>
Cc: kvmarm@...ts.linux.dev
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org
---
 arch/arm64/kvm/Kconfig |    1 +
 1 file changed, 1 insertion(+)

diff -- a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig
--- a/arch/arm64/kvm/Kconfig
+++ b/arch/arm64/kvm/Kconfig
@@ -43,6 +43,7 @@ menuconfig KVM
 	select SCHED_INFO
 	select GUEST_PERF_EVENTS if PERF_EVENTS
 	select INTERVAL_TREE
+	select XARRAY_MULTI
 	help
 	  Support hosting virtualized guest machines.