diff options
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index f853b96ee547..61de81965c44 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -1435,18 +1435,21 @@ static void free_pagetable(struct protection_domain *domain) * another level increases the size of the address space by 9 bits to a size up * to 64 bits. */ -static bool increase_address_space(struct protection_domain *domain, +static void increase_address_space(struct protection_domain *domain, gfp_t gfp) { + unsigned long flags; u64 *pte; - if (domain->mode == PAGE_MODE_6_LEVEL) + spin_lock_irqsave(&domain->lock, flags); + + if (WARN_ON_ONCE(domain->mode == PAGE_MODE_6_LEVEL)) /* address space already 64 bit large */ - return false; + goto out; pte = (void *)get_zeroed_page(gfp); if (!pte) - return false; + goto out; *pte = PM_LEVEL_PDE(domain->mode, iommu_virt_to_phys(domain->pt_root)); @@ -1454,7 +1457,10 @@ static bool increase_address_space(struct protection_domain *domain, domain->mode += 1; domain->updated = true; - return true; +out: + spin_unlock_irqrestore(&domain->lock, flags); + + return; } static u64 *alloc_pte(struct protection_domain *domain, |