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x86: kvm: avoid unused variable warning

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Removing one of the two accesses of the maxphyaddr variable led to
a harmless warning:

arch/x86/kvm/x86.c: In function 'kvm_set_mmio_spte_mask':
arch/x86/kvm/x86.c:6563:6: error: unused variable 'maxphyaddr' [-Werror=unused-variable]

Removing the #ifdef seems to be the nicest workaround, as it
makes the code look cleaner than adding another #ifdef.

Fixes: 28a1f3ac1d0c ("kvm: x86: Set highest physical address bits in non-present/reserved SPTEs")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: stable@vger.kernel.org # L1TF
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Arnd Bergmann 2018-08-20 23:37:50 +02:00 committed by Paolo Bonzini
parent 688e0581db
commit 7288bde1f9
1 changed files with 1 additions and 3 deletions
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4
arch/x86/kvm/x86.c
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@ -6576,14 +6576,12 @@ static void kvm_set_mmio_spte_mask(void)
/* Set the present bit. */
mask |= 1ull;
#ifdef CONFIG_X86_64
/*
* If reserved bit is not supported, clear the present bit to disable
* mmio page fault.
*/
if (maxphyaddr == 52)
if (IS_ENABLED(CONFIG_X86_64) && maxphyaddr == 52)
mask &= ~1ull;
#endif
kvm_mmu_set_mmio_spte_mask(mask, mask);
}