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KVM: arm64: vgic-its: Fix compatibility with 32-bit 

Evaluate GITS_BASER_ENTRY_SIZE once as an int data (GITS_BASER<n>'s
Entry Size is 5-bit wide only), so when used as divider no reference
to __aeabi_uldivmod is generated when build for AArch32.

Use unsigned long long for GITS_BASER_PAGE_SIZE_* since they are
used in conjunction with 64-bit data.

Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
zero-colors
Vladimir Murzin 2016-11-02 11:55:33 +00:00 committed by Marc Zyngier
parent a25f0944ba
commit e29bd6f267
2 changed files with 10 additions and 9 deletions
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8
include/linux/irqchip/arm-gic-v3.h
View File

@ -295,10 +295,10 @@
#define GITS_BASER_InnerShareable \
GIC_BASER_SHAREABILITY(GITS_BASER, InnerShareable)
#define GITS_BASER_PAGE_SIZE_SHIFT (8)
#define GITS_BASER_PAGE_SIZE_4K (0UL << GITS_BASER_PAGE_SIZE_SHIFT)
#define GITS_BASER_PAGE_SIZE_16K (1UL << GITS_BASER_PAGE_SIZE_SHIFT)
#define GITS_BASER_PAGE_SIZE_64K (2UL << GITS_BASER_PAGE_SIZE_SHIFT)
#define GITS_BASER_PAGE_SIZE_MASK (3UL << GITS_BASER_PAGE_SIZE_SHIFT)
#define GITS_BASER_PAGE_SIZE_4K (0ULL << GITS_BASER_PAGE_SIZE_SHIFT)
#define GITS_BASER_PAGE_SIZE_16K (1ULL << GITS_BASER_PAGE_SIZE_SHIFT)
#define GITS_BASER_PAGE_SIZE_64K (2ULL << GITS_BASER_PAGE_SIZE_SHIFT)
#define GITS_BASER_PAGE_SIZE_MASK (3ULL << GITS_BASER_PAGE_SIZE_SHIFT)
#define GITS_BASER_PAGES_MAX 256
#define GITS_BASER_PAGES_SHIFT (0)
#define GITS_BASER_NR_PAGES(r) (((r) & 0xff) + 1)

11
virt/kvm/arm/vgic/vgic-its.c
View File

@ -632,21 +632,22 @@ static bool vgic_its_check_id(struct vgic_its *its, u64 baser, int id)
int index;
u64 indirect_ptr;
gfn_t gfn;
int esz = GITS_BASER_ENTRY_SIZE(baser);
if (!(baser & GITS_BASER_INDIRECT)) {
phys_addr_t addr;
if (id >= (l1_tbl_size / GITS_BASER_ENTRY_SIZE(baser)))
if (id >= (l1_tbl_size / esz))
return false;
addr = BASER_ADDRESS(baser) + id * GITS_BASER_ENTRY_SIZE(baser);
addr = BASER_ADDRESS(baser) + id * esz;
gfn = addr >> PAGE_SHIFT;
return kvm_is_visible_gfn(its->dev->kvm, gfn);
}
/* calculate and check the index into the 1st level */
index = id / (SZ_64K / GITS_BASER_ENTRY_SIZE(baser));
index = id / (SZ_64K / esz);
if (index >= (l1_tbl_size / sizeof(u64)))
return false;
@ -670,8 +671,8 @@ static bool vgic_its_check_id(struct vgic_its *its, u64 baser, int id)
indirect_ptr &= GENMASK_ULL(51, 16);
/* Find the address of the actual entry */
index = id % (SZ_64K / GITS_BASER_ENTRY_SIZE(baser));
indirect_ptr += index * GITS_BASER_ENTRY_SIZE(baser);
index = id % (SZ_64K / esz);
indirect_ptr += index * esz;
gfn = indirect_ptr >> PAGE_SHIFT;
return kvm_is_visible_gfn(its->dev->kvm, gfn);