Reference in a new issue

Blame

Copy permalink

Reference in a new issue

Copy permalink

Vasant Hegde 40c731472f iommu/amd: Expicitly enable CNTRL.EPHEn bit in resume path ... [ Upstream commit ef75966abf ] With recent kernel, AMDGPU failed to resume after suspend on certain laptop. Sample log: ----------- Nov 14 11:52:19 Thinkbook kernel: iommu ivhd0: AMD-Vi: Event logged [ILLEGAL_DEV_TABLE_ENTRY device=0000:06:00.0 pasid=0x00000 address=0x135300000 flags=0x0080] Nov 14 11:52:19 Thinkbook kernel: AMD-Vi: DTE[0]: 7d90000000000003 Nov 14 11:52:19 Thinkbook kernel: AMD-Vi: DTE[1]: 0000100103fc0009 Nov 14 11:52:19 Thinkbook kernel: AMD-Vi: DTE[2]: 2000000117840013 Nov 14 11:52:19 Thinkbook kernel: AMD-Vi: DTE[3]: 0000000000000000 This is because in resume path, CNTRL[EPHEn] is not set. Fix this by setting CNTRL[EPHEn] to 1 in resume path if EFR[EPHSUP] is set. Note May be better approach is to save the control register in suspend path and restore it in resume path instead of trying to set indivisual bits. We will have separate patch for that. Closes: https://bugzilla.kernel.org/show_bug.cgi?id=219499 Fixes: c4cb231111 ("iommu/amd: Add support for enable/disable IOPF") Tested-by: Hamish McIntyre-Bhatty <kernel-bugzilla@regd.hamishmb.com> Signed-off-by: Vasant Hegde <vasant.hegde@amd.com> Link: https://lore.kernel.org/r/20250127094411.5931-1-vasant.hegde@amd.com Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Sasha Levin <sashal@kernel.org>		History 2025-02-21 14:01:22 +01:00
..
amd_iommu.h	iommu/amd: Remove unused amd_iommu_domain_update()	2025-02-08 09:57:34 +01:00
amd_iommu_types.h	iommu/amd: Expicitly enable CNTRL.EPHEn bit in resume path	2025-02-21 14:01:22 +01:00
debugfs.c	iommu/amd: Move AMD IOMMU driver into subdirectory	2020-06-10 17:46:42 +02:00
init.c	iommu/amd: Expicitly enable CNTRL.EPHEn bit in resume path	2025-02-21 14:01:22 +01:00
io_pgtable.c	iommu/amd: Fix corruption when mapping large pages from 0	2024-12-14 20:04:00 +01:00
io_pgtable_v2.c	iommu/amd/pgtbl_v2: Take protection domain lock before invalidating TLB	2024-12-05 14:02:06 +01:00
iommu.c	iommu/amd: Remove unused amd_iommu_domain_update()	2025-02-08 09:57:34 +01:00
Kconfig	iommu/amd: Fix compilation error	2024-05-03 12:12:16 +02:00
Makefile	iommu/amd: Initial SVA support for AMD IOMMU	2024-04-26 12:16:05 +02:00
pasid.c	iommu/amd: Store the nid in io_pgtable_cfg instead of the domain	2024-09-04 11:38:34 +02:00
ppr.c	iommu/amd: Fix Invalid wait context issue	2024-06-04 14:00:59 +02:00
quirks.c	iommu/amd: Include PCI segment ID when initialize IOMMU	2022-07-07 09:37:51 +02:00