903bb0c7b8
[ Upstream commit 93cd0597649844a0fe7989839a3202735fb3ae67 ]
Xen only supports modern CPUs even when running a 32-bit kernel, and it now
requires a kernel built for a 64 byte (or larger) cache line:
In file included from <command-line>:
In function 'xen_vcpu_setup',
inlined from 'xen_vcpu_setup_restore' at arch/x86/xen/enlighten.c:111:3,
inlined from 'xen_vcpu_restore' at arch/x86/xen/enlighten.c:141:3:
include/linux/compiler_types.h:435:45: error: call to '__compiletime_assert_287' declared with attribute error: BUILD_BUG_ON failed: sizeof(*vcpup) > SMP_CACHE_BYTES
arch/x86/xen/enlighten.c:166:9: note: in expansion of macro 'BUILD_BUG_ON'
166 | BUILD_BUG_ON(sizeof(*vcpup) > SMP_CACHE_BYTES);
| ^~~~~~~~~~~~
Enforce the dependency with a whitelist of CPU configurations. In normal
distro kernels, CONFIG_X86_GENERIC is enabled, and this works fine. When this
is not set, still allow Xen to be built on kernels that target a 64-bit
capable CPU.
Fixes: db2832309a82 ("x86/xen: fix percpu vcpu_info allocation")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Tested-by: Alyssa Ross <hi@alyssa.is>
Link: https://lore.kernel.org/r/20231204084722.3789473-1-arnd@kernel.org
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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| .. | ||
| Kconfig | ||
| Makefile | ||
| apic.c | ||
| debugfs.c | ||
| debugfs.h | ||
| efi.c | ||
| enlighten.c | ||
| enlighten_hvm.c | ||
| enlighten_pv.c | ||
| enlighten_pvh.c | ||
| grant-table.c | ||
| irq.c | ||
| mmu.c | ||
| mmu.h | ||
| mmu_hvm.c | ||
| mmu_pv.c | ||
| multicalls.c | ||
| multicalls.h | ||
| p2m.c | ||
| platform-pci-unplug.c | ||
| pmu.c | ||
| pmu.h | ||
| setup.c | ||
| smp.c | ||
| smp.h | ||
| smp_hvm.c | ||
| smp_pv.c | ||
| spinlock.c | ||
| suspend.c | ||
| suspend_hvm.c | ||
| suspend_pv.c | ||
| time.c | ||
| trace.c | ||
| vga.c | ||
| xen-asm.S | ||
| xen-head.S | ||
| xen-ops.h | ||