We have couple of 64-bit register defined in GICv3 architecture, so
"unsigned long" kind of accessors wouldn't work for 32-bit. However,
these registers can't be access as 64-bit in a one go if we run 32-bit
host simply because KVM doesn't support multiple load/store on MMIO
space.
It means that 32-bit guest access these registers in 32-bit chunks, so
the only thing we need to do is to ensure that extract_bytes() always
takes 64-bit data.
Since we are here fix couple of other width related issues by using
ULL variants over UL.
Signed-off-by: Vladimir Murzin <vladimir.murzin@xxxxxxx>
---
virt/kvm/arm/vgic/vgic-mmio-v3.c | 6 +++---
virt/kvm/arm/vgic/vgic-mmio.h | 2 +-
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c b/virt/kvm/arm/vgic/vgic-mmio-v3.c
index ff668e0..cc20b60 100644
--- a/virt/kvm/arm/vgic/vgic-mmio-v3.c
+++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c
@@ -23,7 +23,7 @@
#include "vgic-mmio.h"
/* extract @num bytes at @offset bytes offset in data */
-unsigned long extract_bytes(unsigned long data, unsigned int offset,
+unsigned long extract_bytes(u64 data, unsigned int offset,
unsigned int num)
{
return (data >> (offset * 8)) & GENMASK_ULL(num * 8 - 1, 0);
@@ -179,7 +179,7 @@ static unsigned long vgic_mmio_read_v3r_typer(struct kvm_vcpu *vcpu,
int target_vcpu_id = vcpu->vcpu_id;
u64 value;
- value = (mpidr & GENMASK(23, 0)) << 32;
+ value = (mpidr & GENMASK_ULL(23, 0)) << 32;
value |= ((target_vcpu_id & 0xffff) << 8);
if (target_vcpu_id == atomic_read(&vcpu->kvm->online_vcpus) - 1)
value |= GICR_TYPER_LAST;
@@ -603,7 +603,7 @@ void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg)
bool broadcast;
sgi = (reg & ICC_SGI1R_SGI_ID_MASK) >> ICC_SGI1R_SGI_ID_SHIFT;
- broadcast = reg & BIT(ICC_SGI1R_IRQ_ROUTING_MODE_BIT);
+ broadcast = reg & BIT_ULL(ICC_SGI1R_IRQ_ROUTING_MODE_BIT);
target_cpus = (reg & ICC_SGI1R_TARGET_LIST_MASK) >> ICC_SGI1R_TARGET_LIST_SHIFT;
mpidr = SGI_AFFINITY_LEVEL(reg, 3);
mpidr |= SGI_AFFINITY_LEVEL(reg, 2);
diff --git a/virt/kvm/arm/vgic/vgic-mmio.h b/virt/kvm/arm/vgic/vgic-mmio.h
index 0b3ecf9..80f92ce 100644
--- a/virt/kvm/arm/vgic/vgic-mmio.h
+++ b/virt/kvm/arm/vgic/vgic-mmio.h
@@ -96,7 +96,7 @@ unsigned long vgic_data_mmio_bus_to_host(const void *val, unsigned int len);
void vgic_data_host_to_mmio_bus(void *buf, unsigned int len,
unsigned long data);
-unsigned long extract_bytes(unsigned long data, unsigned int offset,
+unsigned long extract_bytes(u64 data, unsigned int offset,
unsigned int num);
u64 update_64bit_reg(u64 reg, unsigned int offset, unsigned int len,
--
1.7.9.5
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