From: Filippo Sironi sironi@amazon.de
[ Upstream commit ab99be4683d9db33b100497d463274ebd23bd67e ]
This register should have been programmed with the physical address of the memory location containing the shadow tail pointer for the guest virtual APIC log instead of the base address.
Fixes: 8bda0cfbdc1a ('iommu/amd: Detect and initialize guest vAPIC log') Signed-off-by: Filippo Sironi sironi@amazon.de Signed-off-by: Wei Wang wawei@amazon.de Signed-off-by: Suravee Suthikulpanit suravee.suthikulpanit@amd.com Signed-off-by: Joerg Roedel jroedel@suse.de Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iommu/amd_iommu_init.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 6fe2d0346073..b97984a5ddad 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -796,7 +796,8 @@ static int iommu_init_ga_log(struct amd_iommu *iommu) entry = iommu_virt_to_phys(iommu->ga_log) | GA_LOG_SIZE_512; memcpy_toio(iommu->mmio_base + MMIO_GA_LOG_BASE_OFFSET, &entry, sizeof(entry)); - entry = (iommu_virt_to_phys(iommu->ga_log) & 0xFFFFFFFFFFFFFULL) & ~7ULL; + entry = (iommu_virt_to_phys(iommu->ga_log_tail) & + (BIT_ULL(52)-1)) & ~7ULL; memcpy_toio(iommu->mmio_base + MMIO_GA_LOG_TAIL_OFFSET, &entry, sizeof(entry)); writel(0x00, iommu->mmio_base + MMIO_GA_HEAD_OFFSET);