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author | Clément Mathieu--Drif <clement.mathieu--drif@eviden.com> | 2024-05-02 15:29:17 +0000 |
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committer | Philippe Mathieu-Daudé <philmd@linaro.org> | 2024-07-23 18:08:44 +0200 |
commit | 35422553bc6a22fd3de8ac7cb121b509e97b9bb1 (patch) | |
tree | e54cf38948d40d4380ac74663c30aaabbae884b6 /hw/i386 | |
parent | 99481a098837d6adc24a82d0d3123e675b3e191b (diff) | |
download | qemu-35422553bc6a22fd3de8ac7cb121b509e97b9bb1.zip qemu-35422553bc6a22fd3de8ac7cb121b509e97b9bb1.tar.gz qemu-35422553bc6a22fd3de8ac7cb121b509e97b9bb1.tar.bz2 |
hw/i386/intel_iommu: Extract device IOTLB invalidation logic
This piece of code can be shared by both IOTLB invalidation and
PASID-based IOTLB invalidation
No functional changes intended.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Clément Mathieu--Drif <clement.mathieu--drif@eviden.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Message-ID: <20240718081636.879544-12-zhenzhong.duan@intel.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Diffstat (limited to 'hw/i386')
-rw-r--r-- | hw/i386/intel_iommu.c | 57 |
1 files changed, 33 insertions, 24 deletions
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index 37c21a0a..536994c 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -2666,13 +2666,43 @@ static bool vtd_process_inv_iec_desc(IntelIOMMUState *s, return true; } +static void do_invalidate_device_tlb(VTDAddressSpace *vtd_dev_as, + bool size, hwaddr addr) +{ + /* + * According to ATS spec table 2.4: + * S = 0, bits 15:12 = xxxx range size: 4K + * S = 1, bits 15:12 = xxx0 range size: 8K + * S = 1, bits 15:12 = xx01 range size: 16K + * S = 1, bits 15:12 = x011 range size: 32K + * S = 1, bits 15:12 = 0111 range size: 64K + * ... + */ + + IOMMUTLBEvent event; + uint64_t sz; + + if (size) { + sz = (VTD_PAGE_SIZE * 2) << cto64(addr >> VTD_PAGE_SHIFT); + addr &= ~(sz - 1); + } else { + sz = VTD_PAGE_SIZE; + } + + event.type = IOMMU_NOTIFIER_DEVIOTLB_UNMAP; + event.entry.target_as = &vtd_dev_as->as; + event.entry.addr_mask = sz - 1; + event.entry.iova = addr; + event.entry.perm = IOMMU_NONE; + event.entry.translated_addr = 0; + memory_region_notify_iommu(&vtd_dev_as->iommu, 0, event); +} + static bool vtd_process_device_iotlb_desc(IntelIOMMUState *s, VTDInvDesc *inv_desc) { VTDAddressSpace *vtd_dev_as; - IOMMUTLBEvent event; hwaddr addr; - uint64_t sz; uint16_t sid; bool size; @@ -2697,28 +2727,7 @@ static bool vtd_process_device_iotlb_desc(IntelIOMMUState *s, goto done; } - /* According to ATS spec table 2.4: - * S = 0, bits 15:12 = xxxx range size: 4K - * S = 1, bits 15:12 = xxx0 range size: 8K - * S = 1, bits 15:12 = xx01 range size: 16K - * S = 1, bits 15:12 = x011 range size: 32K - * S = 1, bits 15:12 = 0111 range size: 64K - * ... - */ - if (size) { - sz = (VTD_PAGE_SIZE * 2) << cto64(addr >> VTD_PAGE_SHIFT); - addr &= ~(sz - 1); - } else { - sz = VTD_PAGE_SIZE; - } - - event.type = IOMMU_NOTIFIER_DEVIOTLB_UNMAP; - event.entry.target_as = &vtd_dev_as->as; - event.entry.addr_mask = sz - 1; - event.entry.iova = addr; - event.entry.perm = IOMMU_NONE; - event.entry.translated_addr = 0; - memory_region_notify_iommu(&vtd_dev_as->iommu, 0, event); + do_invalidate_device_tlb(vtd_dev_as, size, addr); done: return true; |