April 2023 - Linux-stable-mirror

[PATCH 1/6] mm/hugetlb: Fix uffd-wp during fork()

by Peter Xu

There're a bunch of things that were wrong: - Reading uffd-wp bit from a swap entry should use pte_swp_uffd_wp() rather than huge_pte_uffd_wp(). - When copying over a pte, we should drop uffd-wp bit when !EVENT_FORK (aka, when !userfaultfd_wp(dst_vma)). - When doing early CoW for private hugetlb (e.g. when the parent page was pinned), uffd-wp bit should be properly carried over if necessary. No bug reported probably because most people do not even care about these corner cases, but they are still bugs and can be exposed by the recent unit tests introduced, so fix all of them in one shot. Cc: linux-stable <stable(a)vger.kernel.org> Fixes: bc70fbf269fd ("mm/hugetlb: handle uffd-wp during fork()") Signed-off-by: Peter Xu <peterx(a)redhat.com> --- mm/hugetlb.c | 26 ++++++++++++++++---------- 1 file changed, 16 insertions(+), 10 deletions(-) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index f16b25b1a6b9..7320e64aacc6 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -4953,11 +4953,15 @@ static bool is_hugetlb_entry_hwpoisoned(pte_t pte) static void hugetlb_install_folio(struct vm_area_struct *vma, pte_t *ptep, unsigned long addr, - struct folio *new_folio) + struct folio *new_folio, pte_t old) { + pte_t newpte = make_huge_pte(vma, &new_folio->page, 1); + __folio_mark_uptodate(new_folio); hugepage_add_new_anon_rmap(new_folio, vma, addr); - set_huge_pte_at(vma->vm_mm, addr, ptep, make_huge_pte(vma, &new_folio->page, 1)); + if (userfaultfd_wp(vma) && huge_pte_uffd_wp(old)) + newpte = huge_pte_mkuffd_wp(newpte); + set_huge_pte_at(vma->vm_mm, addr, ptep, newpte); hugetlb_count_add(pages_per_huge_page(hstate_vma(vma)), vma->vm_mm); folio_set_hugetlb_migratable(new_folio); } @@ -5032,14 +5036,11 @@ int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src, */ ; } else if (unlikely(is_hugetlb_entry_hwpoisoned(entry))) { - bool uffd_wp = huge_pte_uffd_wp(entry); - - if (!userfaultfd_wp(dst_vma) && uffd_wp) + if (!userfaultfd_wp(dst_vma)) entry = huge_pte_clear_uffd_wp(entry); set_huge_pte_at(dst, addr, dst_pte, entry); } else if (unlikely(is_hugetlb_entry_migration(entry))) { swp_entry_t swp_entry = pte_to_swp_entry(entry); - bool uffd_wp = huge_pte_uffd_wp(entry); if (!is_readable_migration_entry(swp_entry) && cow) { /* @@ -5049,11 +5050,12 @@ int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src, swp_entry = make_readable_migration_entry( swp_offset(swp_entry)); entry = swp_entry_to_pte(swp_entry); - if (userfaultfd_wp(src_vma) && uffd_wp) - entry = huge_pte_mkuffd_wp(entry); + if (userfaultfd_wp(src_vma) && + pte_swp_uffd_wp(entry)) + entry = pte_swp_mkuffd_wp(entry); set_huge_pte_at(src, addr, src_pte, entry); } - if (!userfaultfd_wp(dst_vma) && uffd_wp) + if (!userfaultfd_wp(dst_vma)) entry = huge_pte_clear_uffd_wp(entry); set_huge_pte_at(dst, addr, dst_pte, entry); } else if (unlikely(is_pte_marker(entry))) { @@ -5114,7 +5116,8 @@ int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src, /* huge_ptep of dst_pte won't change as in child */ goto again; } - hugetlb_install_folio(dst_vma, dst_pte, addr, new_folio); + hugetlb_install_folio(dst_vma, dst_pte, addr, + new_folio, src_pte_old); spin_unlock(src_ptl); spin_unlock(dst_ptl); continue; @@ -5132,6 +5135,9 @@ int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src, entry = huge_pte_wrprotect(entry); } + if (!userfaultfd_wp(dst_vma)) + entry = huge_pte_clear_uffd_wp(entry); + set_huge_pte_at(dst, addr, dst_pte, entry); hugetlb_count_add(npages, dst); } -- 2.39.1

1 year, 5 months

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+ mm-page_alloc-skip-regions-with-hugetlbfs-pages-when-allocating-1g-pages.patch added to mm-hotfixes-unstable branch

by Andrew Morton

The patch titled Subject: mm: page_alloc: skip regions with hugetlbfs pages when allocating 1G pages has been added to the -mm mm-hotfixes-unstable branch. Its filename is mm-page_alloc-skip-regions-with-hugetlbfs-pages-when-allocating-1g-pages.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Mel Gorman <mgorman(a)techsingularity.net> Subject: mm: page_alloc: skip regions with hugetlbfs pages when allocating 1G pages Date: Fri, 14 Apr 2023 15:14:29 +0100 A bug was reported by Yuanxi Liu where allocating 1G pages at runtime is taking an excessive amount of time for large amounts of memory. Further testing allocating huge pages that the cost is linear i.e. if allocating 1G pages in batches of 10 then the time to allocate nr_hugepages from 10->20->30->etc increases linearly even though 10 pages are allocated at each step. Profiles indicated that much of the time is spent checking the validity within already existing huge pages and then attempting a migration that fails after isolating the range, draining pages and a whole lot of other useless work. Commit eb14d4eefdc4 ("mm,page_alloc: drop unnecessary checks from pfn_range_valid_contig") removed two checks, one which ignored huge pages for contiguous allocations as huge pages can sometimes migrate. While there may be value on migrating a 2M page to satisfy a 1G allocation, it's potentially expensive if the 1G allocation fails and it's pointless to try moving a 1G page for a new 1G allocation or scan the tail pages for valid PFNs. Reintroduce the PageHuge check and assume any contiguous region with hugetlbfs pages is unsuitable for a new 1G allocation. The hpagealloc test allocates huge pages in batches and reports the average latency per page over time. This test happens just after boot when fragmentation is not an issue. Units are in milliseconds. hpagealloc 6.3.0-rc6 6.3.0-rc6 6.3.0-rc6 vanilla hugeallocrevert-v1r1 hugeallocsimple-v1r2 Min Latency 26.42 ( 0.00%) 5.07 ( 80.82%) 18.94 ( 28.30%) 1st-qrtle Latency 356.61 ( 0.00%) 5.34 ( 98.50%) 19.85 ( 94.43%) 2nd-qrtle Latency 697.26 ( 0.00%) 5.47 ( 99.22%) 20.44 ( 97.07%) 3rd-qrtle Latency 972.94 ( 0.00%) 5.50 ( 99.43%) 20.81 ( 97.86%) Max-1 Latency 26.42 ( 0.00%) 5.07 ( 80.82%) 18.94 ( 28.30%) Max-5 Latency 82.14 ( 0.00%) 5.11 ( 93.78%) 19.31 ( 76.49%) Max-10 Latency 150.54 ( 0.00%) 5.20 ( 96.55%) 19.43 ( 87.09%) Max-90 Latency 1164.45 ( 0.00%) 5.53 ( 99.52%) 20.97 ( 98.20%) Max-95 Latency 1223.06 ( 0.00%) 5.55 ( 99.55%) 21.06 ( 98.28%) Max-99 Latency 1278.67 ( 0.00%) 5.57 ( 99.56%) 22.56 ( 98.24%) Max Latency 1310.90 ( 0.00%) 8.06 ( 99.39%) 26.62 ( 97.97%) Amean Latency 678.36 ( 0.00%) 5.44 * 99.20%* 20.44 * 96.99%* 6.3.0-rc6 6.3.0-rc6 6.3.0-rc6 vanilla revert-v1 hugeallocfix-v2 Duration User 0.28 0.27 0.30 Duration System 808.66 17.77 35.99 Duration Elapsed 830.87 18.08 36.33 The vanilla kernel is poor, taking up to 1.3 second to allocate a huge page and almost 10 minutes in total to run the test. Reverting the problematic commit reduces it to 8ms at worst and the patch takes 26ms. This patch fixes the main issue with skipping huge pages but leaves the page_count() out because a page with an elevated count potentially can migrate. BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=217022 Link: https://lkml.kernel.org/r/20230414141429.pwgieuwluxwez3rj@techsingularity.n… Fixes: eb14d4eefdc4 ("mm,page_alloc: drop unnecessary checks from pfn_range_valid_contig") Signed-off-by: Mel Gorman <mgorman(a)techsingularity.net> Reported-by: Yuanxi Liu <y.liu(a)naruida.com> Acked-by: Vlastimil Babka <vbabka(a)suse.cz> Reviewed-by: David Hildenbrand <david(a)redhat.com> Acked-by: Michal Hocko <mhocko(a)suse.com> Cc: Matthew Wilcox <willy(a)infradead.org> Cc: Oscar Salvador <OSalvador(a)suse.com> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- mm/page_alloc.c | 3 +++ 1 file changed, 3 insertions(+) --- a/mm/page_alloc.c~mm-page_alloc-skip-regions-with-hugetlbfs-pages-when-allocating-1g-pages +++ a/mm/page_alloc.c @@ -9466,6 +9466,9 @@ static bool pfn_range_valid_contig(struc if (PageReserved(page)) return false; + + if (PageHuge(page)) + return false; } return true; } _ Patches currently in -mm which might be from mgorman(a)techsingularity.net are mm-page_alloc-skip-regions-with-hugetlbfs-pages-when-allocating-1g-pages.patch

1 year, 5 months

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+ maple_tree-fix-mas_empty_area-search.patch added to mm-hotfixes-unstable branch

by Andrew Morton

The patch titled Subject: maple_tree: fix mas_empty_area() search has been added to the -mm mm-hotfixes-unstable branch. Its filename is maple_tree-fix-mas_empty_area-search.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: "Liam R. Howlett" <Liam.Howlett(a)oracle.com> Subject: maple_tree: fix mas_empty_area() search Date: Fri, 14 Apr 2023 10:57:27 -0400 The internal function of mas_awalk() was incorrectly skipping the last entry in a node, which could potentially be NULL. This is only a problem for the left-most node in the tree - otherwise that NULL would not exist. Fix mas_awalk() by using the metadata to obtain the end of the node for the loop and the logical pivot as apposed to the raw pivot value. Link: https://lkml.kernel.org/r/20230414145728.4067069-2-Liam.Howlett@oracle.com Fixes: 54a611b60590 ("Maple Tree: add new data structure") Signed-off-by: Liam R. Howlett <Liam.Howlett(a)oracle.com> Reported-by: Rick Edgecombe <rick.p.edgecombe(a)intel.com> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- lib/maple_tree.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) --- a/lib/maple_tree.c~maple_tree-fix-mas_empty_area-search +++ a/lib/maple_tree.c @@ -5056,10 +5056,10 @@ static inline bool mas_anode_descend(str { enum maple_type type = mte_node_type(mas->node); unsigned long pivot, min, gap = 0; - unsigned char offset; - unsigned long *gaps; - unsigned long *pivots = ma_pivots(mas_mn(mas), type); - void __rcu **slots = ma_slots(mas_mn(mas), type); + unsigned char offset, data_end; + unsigned long *gaps, *pivots; + void __rcu **slots; + struct maple_node *node; bool found = false; if (ma_is_dense(type)) { @@ -5067,13 +5067,15 @@ static inline bool mas_anode_descend(str return true; } - gaps = ma_gaps(mte_to_node(mas->node), type); + node = mas_mn(mas); + pivots = ma_pivots(node, type); + slots = ma_slots(node, type); + gaps = ma_gaps(node, type); offset = mas->offset; min = mas_safe_min(mas, pivots, offset); - for (; offset < mt_slots[type]; offset++) { - pivot = mas_safe_pivot(mas, pivots, offset, type); - if (offset && !pivot) - break; + data_end = ma_data_end(node, type, pivots, mas->max); + for (; offset <= data_end; offset++) { + pivot = mas_logical_pivot(mas, pivots, offset, type); /* Not within lower bounds */ if (mas->index > pivot) _ Patches currently in -mm which might be from Liam.Howlett(a)oracle.com are mm-mprotect-fix-do_mprotect_pkey-return-on-error.patch mm-mempolicy-fix-use-after-free-of-vma-iterator.patch maple_tree-make-maple-state-reusable-after-mas_empty_area_rev.patch maple_tree-fix-mas_empty_area-search.patch mm-mmap-regression-fix-for-unmapped_area_topdown.patch

1 year, 5 months

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+ maple_tree-make-maple-state-reusable-after-mas_empty_area_rev.patch added to mm-hotfixes-unstable branch

by Andrew Morton

The patch titled Subject: maple_tree: make maple state reusable after mas_empty_area_rev() has been added to the -mm mm-hotfixes-unstable branch. Its filename is maple_tree-make-maple-state-reusable-after-mas_empty_area_rev.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: "Liam R. Howlett" <Liam.Howlett(a)oracle.com> Subject: maple_tree: make maple state reusable after mas_empty_area_rev() Date: Fri, 14 Apr 2023 10:57:26 -0400 Stop using maple state min/max for the range by passing through pointers for those values. This will allow the maple state to be reused without resetting. Also add some logic to fail out early on searching with invalid arguments. Link: https://lkml.kernel.org/r/20230414145728.4067069-1-Liam.Howlett@oracle.com Fixes: 54a611b60590 ("Maple Tree: add new data structure") Signed-off-by: Liam R. Howlett <Liam.Howlett(a)oracle.com> Reported-by: Rick Edgecombe <rick.p.edgecombe(a)intel.com> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- lib/maple_tree.c | 27 +++++++++++++-------------- 1 file changed, 13 insertions(+), 14 deletions(-) --- a/lib/maple_tree.c~maple_tree-make-maple-state-reusable-after-mas_empty_area_rev +++ a/lib/maple_tree.c @@ -4965,7 +4965,8 @@ not_found: * Return: True if found in a leaf, false otherwise. * */ -static bool mas_rev_awalk(struct ma_state *mas, unsigned long size) +static bool mas_rev_awalk(struct ma_state *mas, unsigned long size, + unsigned long *gap_min, unsigned long *gap_max) { enum maple_type type = mte_node_type(mas->node); struct maple_node *node = mas_mn(mas); @@ -5030,8 +5031,8 @@ static bool mas_rev_awalk(struct ma_stat if (unlikely(ma_is_leaf(type))) { mas->offset = offset; - mas->min = min; - mas->max = min + gap - 1; + *gap_min = min; + *gap_max = min + gap - 1; return true; } @@ -5307,6 +5308,9 @@ int mas_empty_area(struct ma_state *mas, unsigned long *pivots; enum maple_type mt; + if (min >= max) + return -EINVAL; + if (mas_is_start(mas)) mas_start(mas); else if (mas->offset >= 2) @@ -5361,6 +5365,9 @@ int mas_empty_area_rev(struct ma_state * { struct maple_enode *last = mas->node; + if (min >= max) + return -EINVAL; + if (mas_is_start(mas)) { mas_start(mas); mas->offset = mas_data_end(mas); @@ -5380,7 +5387,7 @@ int mas_empty_area_rev(struct ma_state * mas->index = min; mas->last = max; - while (!mas_rev_awalk(mas, size)) { + while (!mas_rev_awalk(mas, size, &min, &max)) { if (last == mas->node) { if (!mas_rewind_node(mas)) return -EBUSY; @@ -5395,17 +5402,9 @@ int mas_empty_area_rev(struct ma_state * if (unlikely(mas->offset == MAPLE_NODE_SLOTS)) return -EBUSY; - /* - * mas_rev_awalk() has set mas->min and mas->max to the gap values. If - * the maximum is outside the window we are searching, then use the last - * location in the search. - * mas->max and mas->min is the range of the gap. - * mas->index and mas->last are currently set to the search range. - */ - /* Trim the upper limit to the max. */ - if (mas->max <= mas->last) - mas->last = mas->max; + if (max <= mas->last) + mas->last = max; mas->index = mas->last - size + 1; return 0; _ Patches currently in -mm which might be from Liam.Howlett(a)oracle.com are mm-mprotect-fix-do_mprotect_pkey-return-on-error.patch mm-mempolicy-fix-use-after-free-of-vma-iterator.patch maple_tree-make-maple-state-reusable-after-mas_empty_area_rev.patch maple_tree-fix-mas_empty_area-search.patch mm-mmap-regression-fix-for-unmapped_area_topdown.patch

1 year, 5 months

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Representative Needed

by Global Trader Company Ltd UK

My name is , Mrs Rita Potter Rogers we need a Company Representative in your city location, you can work online or at home and get good payment, contact us if interested on this Email: potterroger68(a)gmail.com

1 year, 5 months

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[PATCH net v2 1/1] igc: read before write to SRRCTL register

by Song Yoong Siang

igc_configure_rx_ring() function will be called as part of XDP program setup. If Rx hardware timestamp is enabled prio to XDP program setup, this timestamp enablement will be overwritten when buffer size is written into SRRCTL register. Thus, this commit read the register value before write to SRRCTL register. This commit is tested by using xdp_hw_metadata bpf selftest tool. The tool enables Rx hardware timestamp and then attach XDP program to igc driver. It will display hardware timestamp of UDP packet with port number 9092. Below are detail of test steps and results. Command on DUT: sudo ./xdp_hw_metadata <interface name> Command on Link Partner: echo -n skb | nc -u -q1 <destination IPv4 addr> 9092 Result before this patch: skb hwtstamp is not found! Result after this patch: found skb hwtstamp = 1677800973.642836757 Optionally, read PHC to confirm the values obtained are almost the same: Command: sudo ./testptp -d /dev/ptp0 -g Result: clock time: 1677800973.913598978 or Fri Mar 3 07:49:33 2023 Fixes: fc9df2a0b520 ("igc: Enable RX via AF_XDP zero-copy") Cc: <stable(a)vger.kernel.org> # 5.14+ Signed-off-by: Song Yoong Siang <yoong.siang.song(a)intel.com> Reviewed-by: Jacob Keller <jacob.e.keller(a)intel.com> --- v2 changelog: - Fix indention --- drivers/net/ethernet/intel/igc/igc_base.h | 7 +++++-- drivers/net/ethernet/intel/igc/igc_main.c | 5 ++++- 2 files changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/intel/igc/igc_base.h b/drivers/net/ethernet/intel/igc/igc_base.h index 7a992befca24..b95007d51d13 100644 --- a/drivers/net/ethernet/intel/igc/igc_base.h +++ b/drivers/net/ethernet/intel/igc/igc_base.h @@ -87,8 +87,11 @@ union igc_adv_rx_desc { #define IGC_RXDCTL_SWFLUSH 0x04000000 /* Receive Software Flush */ /* SRRCTL bit definitions */ -#define IGC_SRRCTL_BSIZEPKT_SHIFT 10 /* Shift _right_ */ -#define IGC_SRRCTL_BSIZEHDRSIZE_SHIFT 2 /* Shift _left_ */ +#define IGC_SRRCTL_BSIZEPKT_MASK GENMASK(6, 0) +#define IGC_SRRCTL_BSIZEPKT_SHIFT 10 /* Shift _right_ */ +#define IGC_SRRCTL_BSIZEHDRSIZE_MASK GENMASK(13, 8) +#define IGC_SRRCTL_BSIZEHDRSIZE_SHIFT 2 /* Shift _left_ */ +#define IGC_SRRCTL_DESCTYPE_MASK GENMASK(27, 25) #define IGC_SRRCTL_DESCTYPE_ADV_ONEBUF 0x02000000 #endif /* _IGC_BASE_H */ diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index 25fc6c65209b..88fac08d8a14 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -641,7 +641,10 @@ static void igc_configure_rx_ring(struct igc_adapter *adapter, else buf_size = IGC_RXBUFFER_2048; - srrctl = IGC_RX_HDR_LEN << IGC_SRRCTL_BSIZEHDRSIZE_SHIFT; + srrctl = rd32(IGC_SRRCTL(reg_idx)); + srrctl &= ~(IGC_SRRCTL_BSIZEPKT_MASK | IGC_SRRCTL_BSIZEHDRSIZE_MASK | + IGC_SRRCTL_DESCTYPE_MASK); + srrctl |= IGC_RX_HDR_LEN << IGC_SRRCTL_BSIZEHDRSIZE_SHIFT; srrctl |= buf_size >> IGC_SRRCTL_BSIZEPKT_SHIFT; srrctl |= IGC_SRRCTL_DESCTYPE_ADV_ONEBUF; -- 2.34.1

1 year, 5 months

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[PATCH] crypto: ccp: Don't initialize CCP for PSP 0x1649

by Mario Limonciello

A number of platforms are emitting the error: ```ccp: unable to access the device: you might be running a broken BIOS.``` This is expected behavior as CCP is no longer accessible from the PSP's PCIe BAR so stop trying to probe CCP for 0x1649. Cc: stable(a)vger.kernel.org Signed-off-by: Mario Limonciello <mario.limonciello(a)amd.com> --- drivers/crypto/ccp/sp-pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/crypto/ccp/sp-pci.c b/drivers/crypto/ccp/sp-pci.c index 084d052fddcc..55411b494d69 100644 --- a/drivers/crypto/ccp/sp-pci.c +++ b/drivers/crypto/ccp/sp-pci.c @@ -451,9 +451,9 @@ static const struct pci_device_id sp_pci_table[] = { { PCI_VDEVICE(AMD, 0x1468), (kernel_ulong_t)&dev_vdata[2] }, { PCI_VDEVICE(AMD, 0x1486), (kernel_ulong_t)&dev_vdata[3] }, { PCI_VDEVICE(AMD, 0x15DF), (kernel_ulong_t)&dev_vdata[4] }, - { PCI_VDEVICE(AMD, 0x1649), (kernel_ulong_t)&dev_vdata[4] }, { PCI_VDEVICE(AMD, 0x14CA), (kernel_ulong_t)&dev_vdata[5] }, { PCI_VDEVICE(AMD, 0x15C7), (kernel_ulong_t)&dev_vdata[6] }, + { PCI_VDEVICE(AMD, 0x1649), (kernel_ulong_t)&dev_vdata[6] }, /* Last entry must be zero */ { 0, } }; -- 2.34.1

1 year, 5 months

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FAILED: patch "[PATCH] drm/i915: Workaround ICL CSC_MODE sticky arming" failed to apply to 6.2-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.2-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.2.y git checkout FETCH_HEAD git cherry-pick -x 4d4e766f8b7dbdefa7a78e91eb9c7a29d0d818b8 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023040350-surfer-virus-66bb@gregkh' --subject-prefix 'PATCH 6.2.y' HEAD^.. Possible dependencies: 4d4e766f8b7d ("drm/i915: Workaround ICL CSC_MODE sticky arming") 76b767d4d1cd ("drm/i915: Split icl_color_commit_noarm() from skl_color_commit_noarm()") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 4d4e766f8b7dbdefa7a78e91eb9c7a29d0d818b8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala(a)linux.intel.com> Date: Mon, 20 Mar 2023 11:54:36 +0200 Subject: [PATCH] drm/i915: Workaround ICL CSC_MODE sticky arming MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Unlike SKL/GLK the ICL CSC unit suffers from a new issue where CSC_MODE arming is sticky. That is, once armed it remains armed causing the CSC coeff/offset registers to become effectively self-arming. CSC coeff/offset registers writes no longer disarm the CSC, but fortunately register read still do. So we can use that to disarm the CSC unit once the registers for the current frame have been latched. This avoid s the self-arming behaviour from persisting into the next frame's .color_commit_noarm() call. Cc: <stable(a)vger.kernel.org> #v5.19+ Cc: Manasi Navare <navaremanasi(a)google.com> Cc: Drew Davenport <ddavenport(a)chromium.org> Cc: Imre Deak <imre.deak(a)intel.com> Cc: Jouni Högander <jouni.hogander(a)intel.com> Fixes: d13dde449580 ("drm/i915: Split pipe+output CSC programming to noarm+arm pair") Signed-off-by: Ville Syrjälä <ville.syrjala(a)linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230320095438.17328-5-ville.… Reviewed-by: Imre Deak <imre.deak(a)intel.com> (cherry picked from commit 92736f1b452bbb8a66bdb5b1d263ad00e04dd3b8) Signed-off-by: Jani Nikula <jani.nikula(a)intel.com> diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c index b1d0b49fe8ef..bd598a7f5047 100644 --- a/drivers/gpu/drm/i915/display/intel_color.c +++ b/drivers/gpu/drm/i915/display/intel_color.c @@ -619,6 +619,14 @@ static void ilk_lut_12p4_pack(struct drm_color_lut *entry, u32 ldw, u32 udw) static void icl_color_commit_noarm(const struct intel_crtc_state *crtc_state) { + /* + * Despite Wa_1406463849, ICL no longer suffers from the SKL + * DC5/PSR CSC black screen issue (see skl_color_commit_noarm()). + * Possibly due to the extra sticky CSC arming + * (see icl_color_post_update()). + * + * On TGL+ all CSC arming issues have been properly fixed. + */ icl_load_csc_matrix(crtc_state); } @@ -720,6 +728,28 @@ static void icl_color_commit_arm(const struct intel_crtc_state *crtc_state) crtc_state->csc_mode); } +static void icl_color_post_update(const struct intel_crtc_state *crtc_state) +{ + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); + struct drm_i915_private *i915 = to_i915(crtc->base.dev); + + /* + * Despite Wa_1406463849, ICL CSC is no longer disarmed by + * coeff/offset register *writes*. Instead, once CSC_MODE + * is armed it stays armed, even after it has been latched. + * Afterwards the coeff/offset registers become effectively + * self-arming. That self-arming must be disabled before the + * next icl_color_commit_noarm() tries to write the next set + * of coeff/offset registers. Fortunately register *reads* + * do still disarm the CSC. Naturally this must not be done + * until the previously written CSC registers have actually + * been latched. + * + * TGL+ no longer need this workaround. + */ + intel_de_read_fw(i915, PIPE_CSC_PREOFF_HI(crtc->pipe)); +} + static struct drm_property_blob * create_linear_lut(struct drm_i915_private *i915, int lut_size) { @@ -3115,10 +3145,20 @@ static const struct intel_color_funcs i9xx_color_funcs = { .lut_equal = i9xx_lut_equal, }; +static const struct intel_color_funcs tgl_color_funcs = { + .color_check = icl_color_check, + .color_commit_noarm = icl_color_commit_noarm, + .color_commit_arm = icl_color_commit_arm, + .load_luts = icl_load_luts, + .read_luts = icl_read_luts, + .lut_equal = icl_lut_equal, +}; + static const struct intel_color_funcs icl_color_funcs = { .color_check = icl_color_check, .color_commit_noarm = icl_color_commit_noarm, .color_commit_arm = icl_color_commit_arm, + .color_post_update = icl_color_post_update, .load_luts = icl_load_luts, .read_luts = icl_read_luts, .lut_equal = icl_lut_equal, @@ -3231,7 +3271,9 @@ void intel_color_init_hooks(struct drm_i915_private *i915) else i915->display.funcs.color = &i9xx_color_funcs; } else { - if (DISPLAY_VER(i915) >= 11) + if (DISPLAY_VER(i915) >= 12) + i915->display.funcs.color = &tgl_color_funcs; + else if (DISPLAY_VER(i915) == 11) i915->display.funcs.color = &icl_color_funcs; else if (DISPLAY_VER(i915) == 10) i915->display.funcs.color = &glk_color_funcs;

1 year, 5 months

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Re: [PATCH] HID: wacom: Set a default resolution for older tablets

by Ping Cheng

On Thu, Apr 13, 2023 at 7:37 AM Benjamin Tissoires <benjamin.tissoires(a)redhat.com> wrote: > > On Sun, 09 Apr 2023 09:42:29 -0700, Ping Cheng wrote: > > Some older tablets may not report physical maximum for X/Y > > coordinates. Set a default to prevent undefined resolution. > > > > > > Applied to hid/hid.git (for-6.4/wacom), thanks! > > [1/1] HID: wacom: Set a default resolution for older tablets > https://git.kernel.org/hid/hid/c/08a46b4190d3 This patch can be backported to kernels as early as 3.18. It fixes a firmware HID descriptor issue. Thank you, Ping

1 year, 5 months

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[PATCH STABLE 5.15.y] Reduce IPI overload when multiple CPUs cat /proc/cpuinfo.

by Imran Khan

On large systems with few hundred CPUs, when applications on each or most of these CPUs read proc/cpuinfo we get an IPI storm and situation gets worse if one of the CPUs can't respond to these IPIs timely. commit f4deaf90212c ('x86/cpu: Avoid cpuinfo-induced IPI pileups') addresses this but in the following call chain: show_cpuinfo | |-- aperfmperf_get_khz | |-- aperfmperf_snapshot_cpu aperfmperf_snapshot_cpu gets invoked with wait=true and this means we endup doing a smp_call_function_single to destination CPU, even if its ->scfpending is set. Avoid this by making sure that even with wait=true, IPI is send only if ->scfpending is not set. Signed-off-by: Imran Khan <imran.f.khan(a)oracle.com> --- I am trying this approach (assuming that its okay) to avoid backporting multiple upstream patches to fix this single issue. Kindly let me know if its okay or would it be better to backport the relevant upstream patches instead. arch/x86/kernel/cpu/aperfmperf.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/arch/x86/kernel/cpu/aperfmperf.c b/arch/x86/kernel/cpu/aperfmperf.c index 22911deacb6e4..39fc390cc56af 100644 --- a/arch/x86/kernel/cpu/aperfmperf.c +++ b/arch/x86/kernel/cpu/aperfmperf.c @@ -69,6 +69,7 @@ static void aperfmperf_snapshot_khz(void *dummy) static bool aperfmperf_snapshot_cpu(int cpu, ktime_t now, bool wait) { + int this_cpu; s64 time_delta = ktime_ms_delta(now, per_cpu(samples.time, cpu)); struct aperfmperf_sample *s = per_cpu_ptr(&samples, cpu); @@ -76,8 +77,14 @@ static bool aperfmperf_snapshot_cpu(int cpu, ktime_t now, bool wait) if (time_delta < APERFMPERF_CACHE_THRESHOLD_MS) return true; - if (!atomic_xchg(&s->scfpending, 1) || wait) + if (!atomic_xchg(&s->scfpending, 1)) smp_call_function_single(cpu, aperfmperf_snapshot_khz, NULL, wait); + else if (wait) { + this_cpu = get_cpu(); + while (atomic_read(&s->scfpending)) + cpu_relax(); + put_cpu(); + } /* Return false if the previous iteration was too long ago. */ return time_delta <= APERFMPERF_STALE_THRESHOLD_MS; -- 2.34.1

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