When using e8860(gcn1) on arm64, the kernel crashed on drm/radeon:

[ 11.240414] pc : __memset+0x4c/0x188 [ 11.244101] lr : radeon_uvd_get_create_msg+0x114/0x1d0 [radeon] [ 11.249995] sp : ffff00000d7eb700 [ 11.253295] x29: ffff00000d7eb700 x28: ffff8001f632a868 [ 11.258585] x27: 0000000000040000 x26: ffff00000de00000 [ 11.263875] x25: 0000000000000125 x24: 0000000000000001 [ 11.269168] x23: 0000000000000000 x22: 0000000000000005 [ 11.274459] x21: ffff00000df24000 x20: ffff8001f74b4000 [ 11.279753] x19: 0000000000124000 x18: 0000000000000020 [ 11.285043] x17: 0000000000000000 x16: 0000000000000000 [ 11.290336] x15: ffff000009309000 x14: ffffffffffffffff [ 11.290340] x13: ffff0000094b6f88 x12: ffff0000094b6bd2 [ 11.290343] x11: ffff00000d7eb700 x10: ffff00000d7eb700 [ 11.306246] x9 : ffff00000d7eb700 x8 : ffff00000df2402c [ 11.306254] x7 : 0000000000000000 x6 : ffff0000094b626a [ 11.306257] x5 : 0000000000000000 x4 : 0000000000000004 [ 11.306262] x3 : ffffffffffffffff x2 : 0000000000000fd4 [ 11.306265] x1 : 0000000000000000 x0 : ffff00000df2402c [ 11.306272] Call trace: [ 11.306316] __memset+0x4c/0x188 [ 11.306638] uvd_v1_0_ib_test+0x70/0x1c0 [radeon] [ 11.306758] radeon_ib_ring_tests+0x54/0xe0 [radeon] [ 11.309961] IPv6: ADDRCONF(NETDEV_UP): enp5s0f0: link is not ready [ 11.354628] radeon_device_init+0x53c/0xbdc [radeon] [ 11.354693] radeon_driver_load_kms+0x6c/0x1b0 [radeon] [ 11.364788] drm_dev_register+0x130/0x1c0 [ 11.364794] drm_get_pci_dev+0x8c/0x14c [ 11.372704] radeon_pci_probe+0xb0/0x110 [radeon] [ 11.372715] local_pci_probe+0x3c/0xb0 [ 11.381129] pci_device_probe+0x114/0x1b0 [ 11.385121] really_probe+0x23c/0x400 [ 11.388757] driver_probe_device+0xdc/0x130 [ 11.392921] __driver_attach+0x128/0x150 [ 11.396826] bus_for_each_dev+0x70/0xbc [ 11.400643] driver_attach+0x20/0x2c [ 11.404201] bus_add_driver+0x160/0x260 [ 11.408019] driver_register+0x74/0x120 [ 11.411837] __pci_register_driver+0x40/0x50 [ 11.416149] radeon_init+0x78/0x1000 [radeon] [ 11.420489] do_one_initcall+0x54/0x154 [ 11.424310] do_init_module+0x54/0x260 [ 11.428041] load_module+0x1ccc/0x20b0 [ 11.431773] __se_sys_finit_module+0xac/0x10c [ 11.436109] __arm64_sys_finit_module+0x18/0x20 [ 11.440622] el0_svc_common+0x70/0x164 [ 11.444353] el0_svc_handler+0x2c/0x80 [ 11.448084] el0_svc+0x8/0xc [ 11.450954] Code: d65f03c0 cb0803e4 f2400c84 54000080 (a9001d07)

Obviously, the __memset call is generated by gcc(8.3.1). It optimizes this for loop into memset. But this may break on some platforms which cannot map device memory correctly. So, just invoke `writel` to handle this. Signed-off-by: chenli chenli@uniontech.com --- v1->v2: * Convert the other assignments of msg as well. * Casting types to avoid static checker warnings.

--- drivers/gpu/drm/radeon/radeon_uvd.c | 34 ++++++++++++++--------------- 1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_uvd.c b/drivers/gpu/drm/radeon/radeon_uvd.c index 39c1c339be7b..e576470402b9 100644 --- a/drivers/gpu/drm/radeon/radeon_uvd.c +++ b/drivers/gpu/drm/radeon/radeon_uvd.c @@ -791,19 +791,19 @@ int radeon_uvd_get_create_msg(struct radeon_device *rdev, int ring, return r;

/* stitch together an UVD create msg */ - msg[0] = cpu_to_le32(0x00000de4); - msg[1] = cpu_to_le32(0x00000000); - msg[2] = cpu_to_le32(handle); - msg[3] = cpu_to_le32(0x00000000); - msg[4] = cpu_to_le32(0x00000000); - msg[5] = cpu_to_le32(0x00000000); - msg[6] = cpu_to_le32(0x00000000); - msg[7] = cpu_to_le32(0x00000780); - msg[8] = cpu_to_le32(0x00000440); - msg[9] = cpu_to_le32(0x00000000); - msg[10] = cpu_to_le32(0x01b37000); + writel(cpu_to_le32(0x00000de4), (void __iomem *)&msg[0]); + writel(0x0, (void __iomem *)&msg[1]); + writel(cpu_to_le32(handle), (void __iomem *)&msg[2]); + writel(0x0, (void __iomem *)&msg[3]); + writel(0x0, (void __iomem *)&msg[4]); + writel(0x0, (void __iomem *)&msg[5]); + writel(0x0, (void __iomem *)&msg[6]); + writel(cpu_to_le32(0x00000780), (void __iomem *)&msg[7]); + writel(cpu_to_le32(0x00000440), (void __iomem *)&msg[8]); + writel(0x0, (void __iomem *)&msg[9]); + writel(cpu_to_le32(0x01b37000), (void __iomem *)&msg[10]); for (i = 11; i < 1024; ++i) - msg[i] = cpu_to_le32(0x0); + writel(0x0, (void __iomem *)&msg[i]);

r = radeon_uvd_send_msg(rdev, ring, addr, fence); radeon_bo_unreserve(rdev->uvd.vcpu_bo); @@ -827,12 +827,12 @@ int radeon_uvd_get_destroy_msg(struct radeon_device *rdev, int ring, return r;

/* stitch together an UVD destroy msg */ - msg[0] = cpu_to_le32(0x00000de4); - msg[1] = cpu_to_le32(0x00000002); - msg[2] = cpu_to_le32(handle); - msg[3] = cpu_to_le32(0x00000000); + writel(cpu_to_le32(0x00000de4), (void __iomem *)&msg[0]); + writel(cpu_to_le32(0x00000002), (void __iomem *)&msg[1]); + writel(cpu_to_le32(handle), (void __iomem *)&msg[2]); + writel(0x0, (void __iomem *)&msg[3]); for (i = 4; i < 1024; ++i) - msg[i] = cpu_to_le32(0x0); + writel(0x0, (void __iomem *)&msg[i]);

r = radeon_uvd_send_msg(rdev, ring, addr, fence); radeon_bo_unreserve(rdev->uvd.vcpu_bo);