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KVM: arm64: Factor out vector address calculation

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In order to re-map the guest vectors at EL2 when pKVM is enabled,
refactor __kvm_vector_slot2idx() and kvm_init_vector_slot() to move all
the address calculation logic in a static inline function.

Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Quentin Perret <qperret@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210319100146.1149909-16-qperret@google.com
This commit is contained in:
Quentin Perret 2021-03-19 10:01:23 +00:00 committed by Marc Zyngier
parent d460df1292
commit bc1d2892e9
2 changed files with 9 additions and 8 deletions
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8
arch/arm64/include/asm/kvm_mmu.h
View File

@ -168,6 +168,14 @@ phys_addr_t kvm_mmu_get_httbr(void);
phys_addr_t kvm_get_idmap_vector(void);
int kvm_mmu_init(void);
static inline void *__kvm_vector_slot2addr(void *base,
enum arm64_hyp_spectre_vector slot)
{
int idx = slot - (slot != HYP_VECTOR_DIRECT);
return base + (idx * SZ_2K);
}
struct kvm;
#define kvm_flush_dcache_to_poc(a,l) __flush_dcache_area((a), (l))

9
arch/arm64/kvm/arm.c
View File

@ -1350,16 +1350,9 @@ static unsigned long nvhe_percpu_order(void)
/* A lookup table holding the hypervisor VA for each vector slot */
static void *hyp_spectre_vector_selector[BP_HARDEN_EL2_SLOTS];
static int __kvm_vector_slot2idx(enum arm64_hyp_spectre_vector slot)
{
return slot - (slot != HYP_VECTOR_DIRECT);
}
static void kvm_init_vector_slot(void *base, enum arm64_hyp_spectre_vector slot)
{
int idx = __kvm_vector_slot2idx(slot);
hyp_spectre_vector_selector[slot] = base + (idx * SZ_2K);
hyp_spectre_vector_selector[slot] = __kvm_vector_slot2addr(base, slot);
}
static int kvm_init_vector_slots(void)