September 2024 - Linux-stable-mirror

[PATCH 6.6.y RESEND 2/2] LoongArch: Use accessors to page table entries instead of direct dereference

by He Lugang

From: Huacai Chen <chenhuacai(a)loongson.cn> commit 4574815abf43e2bf05643e1b3f7a2e5d6df894f0 upstream As very well explained in commit 20a004e7b017cce282 ("arm64: mm: Use READ_ONCE/WRITE_ONCE when accessing page tables"), an architecture whose page table walker can modify the PTE in parallel must use READ_ONCE()/ WRITE_ONCE() macro to avoid any compiler transformation. So apply that to LoongArch which is such an architecture, in order to avoid potential problems. Similar to commit edf955647269422e ("riscv: Use accessors to page table entries instead of direct dereference"). Signed-off-by: Huacai Chen <chenhuacai(a)loongson.cn> --- arch/loongarch/include/asm/hugetlb.h | 4 +-- arch/loongarch/include/asm/kfence.h | 6 ++-- arch/loongarch/include/asm/pgtable.h | 48 +++++++++++++++++----------- arch/loongarch/kvm/mmu.c | 8 ++--- arch/loongarch/mm/hugetlbpage.c | 6 ++-- arch/loongarch/mm/init.c | 10 +++--- arch/loongarch/mm/kasan_init.c | 10 +++--- arch/loongarch/mm/pgtable.c | 2 +- 8 files changed, 52 insertions(+), 42 deletions(-) diff --git a/arch/loongarch/include/asm/hugetlb.h b/arch/loongarch/include/asm/hugetlb.h index aa44b3fe43dd..5da32c00d483 100644 --- a/arch/loongarch/include/asm/hugetlb.h +++ b/arch/loongarch/include/asm/hugetlb.h @@ -34,7 +34,7 @@ static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { pte_t clear; - pte_t pte = *ptep; + pte_t pte = ptep_get(ptep); pte_val(clear) = (unsigned long)invalid_pte_table; set_pte_at(mm, addr, ptep, clear); @@ -65,7 +65,7 @@ static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, pte_t *ptep, pte_t pte, int dirty) { - int changed = !pte_same(*ptep, pte); + int changed = !pte_same(ptep_get(ptep), pte); if (changed) { set_pte_at(vma->vm_mm, addr, ptep, pte); diff --git a/arch/loongarch/include/asm/kfence.h b/arch/loongarch/include/asm/kfence.h index 6c82aea1c993..2835b41d2a84 100644 --- a/arch/loongarch/include/asm/kfence.h +++ b/arch/loongarch/include/asm/kfence.h @@ -43,13 +43,13 @@ static inline bool kfence_protect_page(unsigned long addr, bool protect) { pte_t *pte = virt_to_kpte(addr); - if (WARN_ON(!pte) || pte_none(*pte)) + if (WARN_ON(!pte) || pte_none(ptep_get(pte))) return false; if (protect) - set_pte(pte, __pte(pte_val(*pte) & ~(_PAGE_VALID | _PAGE_PRESENT))); + set_pte(pte, __pte(pte_val(ptep_get(pte)) & ~(_PAGE_VALID | _PAGE_PRESENT))); else - set_pte(pte, __pte(pte_val(*pte) | (_PAGE_VALID | _PAGE_PRESENT))); + set_pte(pte, __pte(pte_val(ptep_get(pte)) | (_PAGE_VALID | _PAGE_PRESENT))); preempt_disable(); local_flush_tlb_one(addr); diff --git a/arch/loongarch/include/asm/pgtable.h b/arch/loongarch/include/asm/pgtable.h index 29d9b12298bc..2df497d2f864 100644 --- a/arch/loongarch/include/asm/pgtable.h +++ b/arch/loongarch/include/asm/pgtable.h @@ -106,6 +106,9 @@ extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; #define KFENCE_AREA_START (VMEMMAP_END + 1) #define KFENCE_AREA_END (KFENCE_AREA_START + KFENCE_AREA_SIZE - 1) +#define ptep_get(ptep) READ_ONCE(*(ptep)) +#define pmdp_get(pmdp) READ_ONCE(*(pmdp)) + #define pte_ERROR(e) \ pr_err("%s:%d: bad pte %016lx.\n", __FILE__, __LINE__, pte_val(e)) #ifndef __PAGETABLE_PMD_FOLDED @@ -147,11 +150,6 @@ static inline int p4d_present(p4d_t p4d) return p4d_val(p4d) != (unsigned long)invalid_pud_table; } -static inline void p4d_clear(p4d_t *p4dp) -{ - p4d_val(*p4dp) = (unsigned long)invalid_pud_table; -} - static inline pud_t *p4d_pgtable(p4d_t p4d) { return (pud_t *)p4d_val(p4d); @@ -159,7 +157,12 @@ static inline pud_t *p4d_pgtable(p4d_t p4d) static inline void set_p4d(p4d_t *p4d, p4d_t p4dval) { - *p4d = p4dval; + WRITE_ONCE(*p4d, p4dval); +} + +static inline void p4d_clear(p4d_t *p4dp) +{ + set_p4d(p4dp, __p4d((unsigned long)invalid_pud_table)); } #define p4d_phys(p4d) PHYSADDR(p4d_val(p4d)) @@ -193,17 +196,20 @@ static inline int pud_present(pud_t pud) return pud_val(pud) != (unsigned long)invalid_pmd_table; } -static inline void pud_clear(pud_t *pudp) +static inline pmd_t *pud_pgtable(pud_t pud) { - pud_val(*pudp) = ((unsigned long)invalid_pmd_table); + return (pmd_t *)pud_val(pud); } -static inline pmd_t *pud_pgtable(pud_t pud) +static inline void set_pud(pud_t *pud, pud_t pudval) { - return (pmd_t *)pud_val(pud); + WRITE_ONCE(*pud, pudval); } -#define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while (0) +static inline void pud_clear(pud_t *pudp) +{ + set_pud(pudp, __pud((unsigned long)invalid_pmd_table)); +} #define pud_phys(pud) PHYSADDR(pud_val(pud)) #define pud_page(pud) (pfn_to_page(pud_phys(pud) >> PAGE_SHIFT)) @@ -231,12 +237,15 @@ static inline int pmd_present(pmd_t pmd) return pmd_val(pmd) != (unsigned long)invalid_pte_table; } -static inline void pmd_clear(pmd_t *pmdp) +static inline void set_pmd(pmd_t *pmd, pmd_t pmdval) { - pmd_val(*pmdp) = ((unsigned long)invalid_pte_table); + WRITE_ONCE(*pmd, pmdval); } -#define set_pmd(pmdptr, pmdval) do { *(pmdptr) = (pmdval); } while (0) +static inline void pmd_clear(pmd_t *pmdp) +{ + set_pmd(pmdp, __pmd((unsigned long)invalid_pte_table)); +} #define pmd_phys(pmd) PHYSADDR(pmd_val(pmd)) @@ -314,7 +323,8 @@ extern void paging_init(void); static inline void set_pte(pte_t *ptep, pte_t pteval) { - *ptep = pteval; + WRITE_ONCE(*ptep, pteval); + if (pte_val(pteval) & _PAGE_GLOBAL) { pte_t *buddy = ptep_buddy(ptep); /* @@ -341,8 +351,8 @@ static inline void set_pte(pte_t *ptep, pte_t pteval) : [buddy] "+m" (buddy->pte), [tmp] "=&r" (tmp) : [global] "r" (page_global)); #else /* !CONFIG_SMP */ - if (pte_none(*buddy)) - pte_val(*buddy) = pte_val(*buddy) | _PAGE_GLOBAL; + if (pte_none(ptep_get(buddy))) + WRITE_ONCE(*buddy, __pte(pte_val(ptep_get(buddy)) | _PAGE_GLOBAL)); #endif /* CONFIG_SMP */ } } @@ -350,7 +360,7 @@ static inline void set_pte(pte_t *ptep, pte_t pteval) static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { /* Preserve global status for the pair */ - if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL) + if (pte_val(ptep_get(ptep_buddy(ptep))) & _PAGE_GLOBAL) set_pte(ptep, __pte(_PAGE_GLOBAL)); else set_pte(ptep, __pte(0)); @@ -591,7 +601,7 @@ static inline pmd_t pmd_mkinvalid(pmd_t pmd) static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, unsigned long address, pmd_t *pmdp) { - pmd_t old = *pmdp; + pmd_t old = pmdp_get(pmdp); pmd_clear(pmdp); diff --git a/arch/loongarch/kvm/mmu.c b/arch/loongarch/kvm/mmu.c index 80480df5f550..545a824e38b1 100644 --- a/arch/loongarch/kvm/mmu.c +++ b/arch/loongarch/kvm/mmu.c @@ -679,19 +679,19 @@ static int host_pfn_mapping_level(struct kvm *kvm, gfn_t gfn, * value) and then p*d_offset() walks into the target huge page instead * of the old page table (sees the new value). */ - pgd = READ_ONCE(*pgd_offset(kvm->mm, hva)); + pgd = pgdp_get(pgd_offset(kvm->mm, hva)); if (pgd_none(pgd)) goto out; - p4d = READ_ONCE(*p4d_offset(&pgd, hva)); + p4d = p4dp_get(p4d_offset(&pgd, hva)); if (p4d_none(p4d) || !p4d_present(p4d)) goto out; - pud = READ_ONCE(*pud_offset(&p4d, hva)); + pud = pudp_get(pud_offset(&p4d, hva)); if (pud_none(pud) || !pud_present(pud)) goto out; - pmd = READ_ONCE(*pmd_offset(&pud, hva)); + pmd = pmdp_get(pmd_offset(&pud, hva)); if (pmd_none(pmd) || !pmd_present(pmd)) goto out; diff --git a/arch/loongarch/mm/hugetlbpage.c b/arch/loongarch/mm/hugetlbpage.c index 1e76fcb83093..62ddcea0aa14 100644 --- a/arch/loongarch/mm/hugetlbpage.c +++ b/arch/loongarch/mm/hugetlbpage.c @@ -39,11 +39,11 @@ pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr, pmd_t *pmd = NULL; pgd = pgd_offset(mm, addr); - if (pgd_present(*pgd)) { + if (pgd_present(pgdp_get(pgd))) { p4d = p4d_offset(pgd, addr); - if (p4d_present(*p4d)) { + if (p4d_present(p4dp_get(p4d))) { pud = pud_offset(p4d, addr); - if (pud_present(*pud)) + if (pud_present(pudp_get(pud))) pmd = pmd_offset(pud, addr); } } diff --git a/arch/loongarch/mm/init.c b/arch/loongarch/mm/init.c index 4dd53427f657..71fa4b773eb3 100644 --- a/arch/loongarch/mm/init.c +++ b/arch/loongarch/mm/init.c @@ -140,7 +140,7 @@ void __meminit vmemmap_set_pmd(pmd_t *pmd, void *p, int node, int __meminit vmemmap_check_pmd(pmd_t *pmd, int node, unsigned long addr, unsigned long next) { - int huge = pmd_val(*pmd) & _PAGE_HUGE; + int huge = pmd_val(pmdp_get(pmd)) & _PAGE_HUGE; if (huge) vmemmap_verify((pte_t *)pmd, node, addr, next); @@ -172,7 +172,7 @@ pte_t * __init populate_kernel_pte(unsigned long addr) pud_t *pud; pmd_t *pmd; - if (p4d_none(*p4d)) { + if (p4d_none(p4dp_get(p4d))) { pud = memblock_alloc(PAGE_SIZE, PAGE_SIZE); if (!pud) panic("%s: Failed to allocate memory\n", __func__); @@ -183,7 +183,7 @@ pte_t * __init populate_kernel_pte(unsigned long addr) } pud = pud_offset(p4d, addr); - if (pud_none(*pud)) { + if (pud_none(pudp_get(pud))) { pmd = memblock_alloc(PAGE_SIZE, PAGE_SIZE); if (!pmd) panic("%s: Failed to allocate memory\n", __func__); @@ -194,7 +194,7 @@ pte_t * __init populate_kernel_pte(unsigned long addr) } pmd = pmd_offset(pud, addr); - if (!pmd_present(*pmd)) { + if (!pmd_present(pmdp_get(pmd))) { pte_t *pte; pte = memblock_alloc(PAGE_SIZE, PAGE_SIZE); @@ -215,7 +215,7 @@ void __init __set_fixmap(enum fixed_addresses idx, BUG_ON(idx <= FIX_HOLE || idx >= __end_of_fixed_addresses); ptep = populate_kernel_pte(addr); - if (!pte_none(*ptep)) { + if (!pte_none(ptep_get(ptep))) { pte_ERROR(*ptep); return; } diff --git a/arch/loongarch/mm/kasan_init.c b/arch/loongarch/mm/kasan_init.c index c608adc99845..427d6b1aec09 100644 --- a/arch/loongarch/mm/kasan_init.c +++ b/arch/loongarch/mm/kasan_init.c @@ -105,7 +105,7 @@ static phys_addr_t __init kasan_alloc_zeroed_page(int node) static pte_t *__init kasan_pte_offset(pmd_t *pmdp, unsigned long addr, int node, bool early) { - if (__pmd_none(early, READ_ONCE(*pmdp))) { + if (__pmd_none(early, pmdp_get(pmdp))) { phys_addr_t pte_phys = early ? __pa_symbol(kasan_early_shadow_pte) : kasan_alloc_zeroed_page(node); if (!early) @@ -118,7 +118,7 @@ static pte_t *__init kasan_pte_offset(pmd_t *pmdp, unsigned long addr, int node, static pmd_t *__init kasan_pmd_offset(pud_t *pudp, unsigned long addr, int node, bool early) { - if (__pud_none(early, READ_ONCE(*pudp))) { + if (__pud_none(early, pudp_get(pudp))) { phys_addr_t pmd_phys = early ? __pa_symbol(kasan_early_shadow_pmd) : kasan_alloc_zeroed_page(node); if (!early) @@ -131,7 +131,7 @@ static pmd_t *__init kasan_pmd_offset(pud_t *pudp, unsigned long addr, int node, static pud_t *__init kasan_pud_offset(p4d_t *p4dp, unsigned long addr, int node, bool early) { - if (__p4d_none(early, READ_ONCE(*p4dp))) { + if (__p4d_none(early, p4dp_get(p4dp))) { phys_addr_t pud_phys = early ? __pa_symbol(kasan_early_shadow_pud) : kasan_alloc_zeroed_page(node); if (!early) @@ -154,7 +154,7 @@ static void __init kasan_pte_populate(pmd_t *pmdp, unsigned long addr, : kasan_alloc_zeroed_page(node); next = addr + PAGE_SIZE; set_pte(ptep, pfn_pte(__phys_to_pfn(page_phys), PAGE_KERNEL)); - } while (ptep++, addr = next, addr != end && __pte_none(early, READ_ONCE(*ptep))); + } while (ptep++, addr = next, addr != end && __pte_none(early, ptep_get(ptep))); } static void __init kasan_pmd_populate(pud_t *pudp, unsigned long addr, @@ -166,7 +166,7 @@ static void __init kasan_pmd_populate(pud_t *pudp, unsigned long addr, do { next = pmd_addr_end(addr, end); kasan_pte_populate(pmdp, addr, next, node, early); - } while (pmdp++, addr = next, addr != end && __pmd_none(early, READ_ONCE(*pmdp))); + } while (pmdp++, addr = next, addr != end && __pmd_none(early, pmdp_get(pmdp))); } static void __init kasan_pud_populate(p4d_t *p4dp, unsigned long addr, diff --git a/arch/loongarch/mm/pgtable.c b/arch/loongarch/mm/pgtable.c index 2aae72e63871..6a038a27373a 100644 --- a/arch/loongarch/mm/pgtable.c +++ b/arch/loongarch/mm/pgtable.c @@ -128,7 +128,7 @@ pmd_t mk_pmd(struct page *page, pgprot_t prot) void set_pmd_at(struct mm_struct *mm, unsigned long addr, pmd_t *pmdp, pmd_t pmd) { - *pmdp = pmd; + WRITE_ONCE(*pmdp, pmd); flush_tlb_all(); } -- 2.45.2

1 year, 1 month

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[PATCH 6.1] soc: ti: omap_prm: Add a null pointer check to the omap_prm_domain_init

by Xiangyu Chen

[ Upstream commit 5d7f58ee08434a33340f75ac7ac5071eea9673b3 ] devm_kasprintf() returns a pointer to dynamically allocated memory which can be NULL upon failure. Ensure the allocation was successful by checking the pointer validity. Signed-off-by: Kunwu Chan <chentao(a)kylinos.cn> Link: https://lore.kernel.org/r/20240118054257.200814-1-chentao@kylinos.cn Signed-off-by: Ulf Hansson <ulf.hansson(a)linaro.org> [Xiangyu: Modified to apply on 6.1.y] Signed-off-by: Xiangyu Chen <xiangyu.chen(a)windriver.com> --- drivers/soc/ti/omap_prm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/soc/ti/omap_prm.c b/drivers/soc/ti/omap_prm.c index 913b964374a4..33ef58195955 100644 --- a/drivers/soc/ti/omap_prm.c +++ b/drivers/soc/ti/omap_prm.c @@ -696,6 +696,8 @@ static int omap_prm_domain_init(struct device *dev, struct omap_prm *prm) data = prm->data; name = devm_kasprintf(dev, GFP_KERNEL, "prm_%s", data->name); + if (!name) + return -ENOMEM; prmd->dev = dev; prmd->prm = prm; -- 2.34.1

1 year, 1 month

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[PATCH] net: xilinx: axienet: Fix race in axienet_stop

by Sean Anderson

[ Upstream commit 858430db28a5f5a11f8faa3a6fa805438e6f0851 ] axienet_dma_err_handler can race with axienet_stop in the following manner: CPU 1 CPU 2 ====================== ================== axienet_stop() napi_disable() axienet_dma_stop() axienet_dma_err_handler() napi_disable() axienet_dma_stop() axienet_dma_start() napi_enable() cancel_work_sync() free_irq() Fix this by setting a flag in axienet_stop telling axienet_dma_err_handler not to bother doing anything. I chose not to use disable_work_sync to allow for easier backporting. Signed-off-by: Sean Anderson <sean.anderson(a)linux.dev> Fixes: 8a3b7a252dca ("drivers/net/ethernet/xilinx: added Xilinx AXI Ethernet driver") Link: https://patch.msgid.link/20240903175141.4132898-1-sean.anderson@linux.dev Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> [ Adjusted to apply before dmaengine support ] Signed-off-by: Sean Anderson <sean.anderson(a)linux.dev> --- This patch is adjusted to apply to v6.6 kernels and earlier, which do not contain commit 6a91b846af85 ("net: axienet: Introduce dmaengine support"). drivers/net/ethernet/xilinx/xilinx_axienet.h | 3 +++ drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 8 ++++++++ 2 files changed, 11 insertions(+) diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet.h b/drivers/net/ethernet/xilinx/xilinx_axienet.h index f09f10f17d7e..2facbdfbb319 100644 --- a/drivers/net/ethernet/xilinx/xilinx_axienet.h +++ b/drivers/net/ethernet/xilinx/xilinx_axienet.h @@ -419,6 +419,8 @@ struct axidma_bd { * @tx_bytes: TX byte count for statistics * @tx_stat_sync: Synchronization object for TX stats * @dma_err_task: Work structure to process Axi DMA errors + * @stopping: Set when @dma_err_task shouldn't do anything because we are + * about to stop the device. * @tx_irq: Axidma TX IRQ number * @rx_irq: Axidma RX IRQ number * @eth_irq: Ethernet core IRQ number @@ -481,6 +483,7 @@ struct axienet_local { struct u64_stats_sync tx_stat_sync; struct work_struct dma_err_task; + bool stopping; int tx_irq; int rx_irq; diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c index 144feb7a2fda..65d7aaad43fe 100644 --- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c +++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c @@ -1162,6 +1162,7 @@ static int axienet_open(struct net_device *ndev) phylink_start(lp->phylink); /* Enable worker thread for Axi DMA error handling */ + lp->stopping = false; INIT_WORK(&lp->dma_err_task, axienet_dma_err_handler); napi_enable(&lp->napi_rx); @@ -1217,6 +1218,9 @@ static int axienet_stop(struct net_device *ndev) dev_dbg(&ndev->dev, "axienet_close()\n"); + WRITE_ONCE(lp->stopping, true); + flush_work(&lp->dma_err_task); + napi_disable(&lp->napi_tx); napi_disable(&lp->napi_rx); @@ -1761,6 +1765,10 @@ static void axienet_dma_err_handler(struct work_struct *work) dma_err_task); struct net_device *ndev = lp->ndev; + /* Don't bother if we are going to stop anyway */ + if (READ_ONCE(lp->stopping)) + return; + napi_disable(&lp->napi_tx); napi_disable(&lp->napi_rx); -- 2.35.1.1320.gc452695387.dirty

1 year, 1 month

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FAILED: patch "[PATCH] clocksource: hyper-v: Use lapic timer in a TDX VM without" failed to apply to 6.6-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.6-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-6.6.y git checkout FETCH_HEAD git cherry-pick -x 7f828d5fff7d24752e1ecf6bebb6617a81f97b93 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024091354-stock-suspend-e1ee@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^.. Possible dependencies: 7f828d5fff7d ("clocksource: hyper-v: Use lapic timer in a TDX VM without paravisor") b967df629351 ("hyperv-tlfs: Rename some HV_REGISTER_* defines for consistency") 0e3f7d120086 ("hyperv-tlfs: Change prefix of generic HV_REGISTER_* MSRs to HV_MSR_*") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 7f828d5fff7d24752e1ecf6bebb6617a81f97b93 Mon Sep 17 00:00:00 2001 From: Dexuan Cui <decui(a)microsoft.com> Date: Thu, 20 Jun 2024 23:16:14 -0700 Subject: [PATCH] clocksource: hyper-v: Use lapic timer in a TDX VM without paravisor In a TDX VM without paravisor, currently the default timer is the Hyper-V timer, which depends on the slow VM Reference Counter MSR: the Hyper-V TSC page is not enabled in such a VM because the VM uses Invariant TSC as a better clocksource and it's challenging to mark the Hyper-V TSC page shared in very early boot. Lower the rating of the Hyper-V timer so the local APIC timer becomes the the default timer in such a VM, and print a warning in case Invariant TSC is unavailable in such a VM. This change should cause no perceivable performance difference. Cc: stable(a)vger.kernel.org # 6.6+ Reviewed-by: Roman Kisel <romank(a)linux.microsoft.com> Signed-off-by: Dexuan Cui <decui(a)microsoft.com> Reviewed-by: Michael Kelley <mhklinux(a)outlook.com> Link: https://lore.kernel.org/r/20240621061614.8339-1-decui@microsoft.com Signed-off-by: Wei Liu <wei.liu(a)kernel.org> Message-ID: <20240621061614.8339-1-decui(a)microsoft.com> diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index e0fd57a8ba84..954b7cbfa2f0 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -449,9 +449,23 @@ static void __init ms_hyperv_init_platform(void) ms_hyperv.hints &= ~HV_X64_APIC_ACCESS_RECOMMENDED; if (!ms_hyperv.paravisor_present) { - /* To be supported: more work is required. */ + /* + * Mark the Hyper-V TSC page feature as disabled + * in a TDX VM without paravisor so that the + * Invariant TSC, which is a better clocksource + * anyway, is used instead. + */ ms_hyperv.features &= ~HV_MSR_REFERENCE_TSC_AVAILABLE; + /* + * The Invariant TSC is expected to be available + * in a TDX VM without paravisor, but if not, + * print a warning message. The slower Hyper-V MSR-based + * Ref Counter should end up being the clocksource. + */ + if (!(ms_hyperv.features & HV_ACCESS_TSC_INVARIANT)) + pr_warn("Hyper-V: Invariant TSC is unavailable\n"); + /* HV_MSR_CRASH_CTL is unsupported. */ ms_hyperv.misc_features &= ~HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE; diff --git a/drivers/clocksource/hyperv_timer.c b/drivers/clocksource/hyperv_timer.c index b2a080647e41..99177835cade 100644 --- a/drivers/clocksource/hyperv_timer.c +++ b/drivers/clocksource/hyperv_timer.c @@ -137,7 +137,21 @@ static int hv_stimer_init(unsigned int cpu) ce->name = "Hyper-V clockevent"; ce->features = CLOCK_EVT_FEAT_ONESHOT; ce->cpumask = cpumask_of(cpu); - ce->rating = 1000; + + /* + * Lower the rating of the Hyper-V timer in a TDX VM without paravisor, + * so the local APIC timer (lapic_clockevent) is the default timer in + * such a VM. The Hyper-V timer is not preferred in such a VM because + * it depends on the slow VM Reference Counter MSR (the Hyper-V TSC + * page is not enbled in such a VM because the VM uses Invariant TSC + * as a better clocksource and it's challenging to mark the Hyper-V + * TSC page shared in very early boot). + */ + if (!ms_hyperv.paravisor_present && hv_isolation_type_tdx()) + ce->rating = 90; + else + ce->rating = 1000; + ce->set_state_shutdown = hv_ce_shutdown; ce->set_state_oneshot = hv_ce_set_oneshot; ce->set_next_event = hv_ce_set_next_event;

1 year, 1 month

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FAILED: patch "[PATCH] virtio_net: disable premapped mode by default" failed to apply to 6.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.10-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-6.10.y git checkout FETCH_HEAD git cherry-pick -x 111fc9f517cb293c4213673733b980123c3b0209 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024091336-family-daffodil-541d@gregkh' --subject-prefix 'PATCH 6.10.y' HEAD^.. Possible dependencies: 111fc9f517cb ("virtio_net: disable premapped mode by default") dc4547fbba87 ("Revert "virtio_net: rx remove premapped failover code"") e9f3962441c0 ("virtio_net: xsk: rx: support fill with xsk buffer") 19a5a7710ee1 ("virtio_net: xsk: support wakeup") 09d2b3182c8e ("virtio_net: xsk: bind/unbind xsk for rx") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 111fc9f517cb293c4213673733b980123c3b0209 Mon Sep 17 00:00:00 2001 From: Xuan Zhuo <xuanzhuo(a)linux.alibaba.com> Date: Fri, 6 Sep 2024 20:31:37 +0800 Subject: [PATCH] virtio_net: disable premapped mode by default Now, the premapped mode encounters some problem. http://lore.kernel.org/all/8b20cc28-45a9-4643-8e87-ba164a540c0a@oracle.com So we disable the premapped mode by default. We can re-enable it in the future. Fixes: f9dac92ba908 ("virtio_ring: enable premapped mode whatever use_dma_api") Reported-by: "Si-Wei Liu" <si-wei.liu(a)oracle.com> Closes: http://lore.kernel.org/all/8b20cc28-45a9-4643-8e87-ba164a540c0a@oracle.com Signed-off-by: Xuan Zhuo <xuanzhuo(a)linux.alibaba.com> Acked-by: Michael S. Tsirkin <mst(a)redhat.com> Tested-by: Takero Funaki <flintglass(a)gmail.com> Link: https://patch.msgid.link/20240906123137.108741-4-xuanzhuo@linux.alibaba.com Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 1cf80648f82a..5a1c1ec5a64b 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -977,22 +977,6 @@ static void *virtnet_rq_alloc(struct receive_queue *rq, u32 size, gfp_t gfp) return buf; } -static void virtnet_rq_set_premapped(struct virtnet_info *vi) -{ - int i; - - /* disable for big mode */ - if (!vi->mergeable_rx_bufs && vi->big_packets) - return; - - for (i = 0; i < vi->max_queue_pairs; i++) { - if (virtqueue_set_dma_premapped(vi->rq[i].vq)) - continue; - - vi->rq[i].do_dma = true; - } -} - static void virtnet_rq_unmap_free_buf(struct virtqueue *vq, void *buf) { struct virtnet_info *vi = vq->vdev->priv; @@ -6105,8 +6089,6 @@ static int init_vqs(struct virtnet_info *vi) if (ret) goto err_free; - virtnet_rq_set_premapped(vi); - cpus_read_lock(); virtnet_set_affinity(vi); cpus_read_unlock();

1 year, 1 month

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FAILED: patch "[PATCH] Revert "virtio_net: big mode skip the unmap check"" failed to apply to 6.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.10-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-6.10.y git checkout FETCH_HEAD git cherry-pick -x 38eef112a8e547b8c207b2a521ad4b077d792100 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024091308-deceit-dingy-d575@gregkh' --subject-prefix 'PATCH 6.10.y' HEAD^.. Possible dependencies: 38eef112a8e5 ("Revert "virtio_net: big mode skip the unmap check"") 99c861b44eb1 ("virtio_net: xsk: rx: support recv merge mode") a4e7ba702701 ("virtio_net: xsk: rx: support recv small mode") e9f3962441c0 ("virtio_net: xsk: rx: support fill with xsk buffer") 19a5a7710ee1 ("virtio_net: xsk: support wakeup") 09d2b3182c8e ("virtio_net: xsk: bind/unbind xsk for rx") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 38eef112a8e547b8c207b2a521ad4b077d792100 Mon Sep 17 00:00:00 2001 From: Xuan Zhuo <xuanzhuo(a)linux.alibaba.com> Date: Fri, 6 Sep 2024 20:31:36 +0800 Subject: [PATCH] Revert "virtio_net: big mode skip the unmap check" This reverts commit a377ae542d8d0a20a3173da3bbba72e045bea7a9. Signed-off-by: Xuan Zhuo <xuanzhuo(a)linux.alibaba.com> Acked-by: Michael S. Tsirkin <mst(a)redhat.com> Tested-by: Takero Funaki <flintglass(a)gmail.com> Link: https://patch.msgid.link/20240906123137.108741-3-xuanzhuo@linux.alibaba.com Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 6fa8aab18484..1cf80648f82a 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -1006,7 +1006,7 @@ static void virtnet_rq_unmap_free_buf(struct virtqueue *vq, void *buf) return; } - if (!vi->big_packets || vi->mergeable_rx_bufs) + if (rq->do_dma) virtnet_rq_unmap(rq, buf, 0); virtnet_rq_free_buf(vi, rq, buf); @@ -2716,7 +2716,7 @@ static int virtnet_receive_packets(struct virtnet_info *vi, } } else { while (packets < budget && - (buf = virtqueue_get_buf(rq->vq, &len)) != NULL) { + (buf = virtnet_rq_get_buf(rq, &len, NULL)) != NULL) { receive_buf(vi, rq, buf, len, NULL, xdp_xmit, stats); packets++; }

1 year, 1 month

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FAILED: patch "[PATCH] Revert "virtio_net: rx remove premapped failover code"" failed to apply to 6.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.10-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-6.10.y git checkout FETCH_HEAD git cherry-pick -x dc4547fbba874718af76e5c28c815fcef5c13c6c # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024091301-suitcase-hazard-0817@gregkh' --subject-prefix 'PATCH 6.10.y' HEAD^.. Possible dependencies: dc4547fbba87 ("Revert "virtio_net: rx remove premapped failover code"") e9f3962441c0 ("virtio_net: xsk: rx: support fill with xsk buffer") 19a5a7710ee1 ("virtio_net: xsk: support wakeup") 09d2b3182c8e ("virtio_net: xsk: bind/unbind xsk for rx") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From dc4547fbba874718af76e5c28c815fcef5c13c6c Mon Sep 17 00:00:00 2001 From: Xuan Zhuo <xuanzhuo(a)linux.alibaba.com> Date: Fri, 6 Sep 2024 20:31:35 +0800 Subject: [PATCH] Revert "virtio_net: rx remove premapped failover code" This reverts commit defd28aa5acb0fd7c15adc6bc40a8ac277d04dea. Recover the code to disable premapped mode. Signed-off-by: Xuan Zhuo <xuanzhuo(a)linux.alibaba.com> Acked-by: Michael S. Tsirkin <mst(a)redhat.com> Tested-by: Takero Funaki <flintglass(a)gmail.com> Link: https://patch.msgid.link/20240906123137.108741-2-xuanzhuo@linux.alibaba.com Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index c6af18948092..6fa8aab18484 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -356,6 +356,9 @@ struct receive_queue { struct xdp_rxq_info xsk_rxq_info; struct xdp_buff **xsk_buffs; + + /* Do dma by self */ + bool do_dma; }; /* This structure can contain rss message with maximum settings for indirection table and keysize @@ -885,7 +888,7 @@ static void *virtnet_rq_get_buf(struct receive_queue *rq, u32 *len, void **ctx) void *buf; buf = virtqueue_get_buf_ctx(rq->vq, len, ctx); - if (buf) + if (buf && rq->do_dma) virtnet_rq_unmap(rq, buf, *len); return buf; @@ -898,6 +901,11 @@ static void virtnet_rq_init_one_sg(struct receive_queue *rq, void *buf, u32 len) u32 offset; void *head; + if (!rq->do_dma) { + sg_init_one(rq->sg, buf, len); + return; + } + head = page_address(rq->alloc_frag.page); offset = buf - head; @@ -923,42 +931,44 @@ static void *virtnet_rq_alloc(struct receive_queue *rq, u32 size, gfp_t gfp) head = page_address(alloc_frag->page); - dma = head; + if (rq->do_dma) { + dma = head; - /* new pages */ - if (!alloc_frag->offset) { - if (rq->last_dma) { - /* Now, the new page is allocated, the last dma - * will not be used. So the dma can be unmapped - * if the ref is 0. + /* new pages */ + if (!alloc_frag->offset) { + if (rq->last_dma) { + /* Now, the new page is allocated, the last dma + * will not be used. So the dma can be unmapped + * if the ref is 0. + */ + virtnet_rq_unmap(rq, rq->last_dma, 0); + rq->last_dma = NULL; + } + + dma->len = alloc_frag->size - sizeof(*dma); + + addr = virtqueue_dma_map_single_attrs(rq->vq, dma + 1, + dma->len, DMA_FROM_DEVICE, 0); + if (virtqueue_dma_mapping_error(rq->vq, addr)) + return NULL; + + dma->addr = addr; + dma->need_sync = virtqueue_dma_need_sync(rq->vq, addr); + + /* Add a reference to dma to prevent the entire dma from + * being released during error handling. This reference + * will be freed after the pages are no longer used. */ - virtnet_rq_unmap(rq, rq->last_dma, 0); - rq->last_dma = NULL; + get_page(alloc_frag->page); + dma->ref = 1; + alloc_frag->offset = sizeof(*dma); + + rq->last_dma = dma; } - dma->len = alloc_frag->size - sizeof(*dma); - - addr = virtqueue_dma_map_single_attrs(rq->vq, dma + 1, - dma->len, DMA_FROM_DEVICE, 0); - if (virtqueue_dma_mapping_error(rq->vq, addr)) - return NULL; - - dma->addr = addr; - dma->need_sync = virtqueue_dma_need_sync(rq->vq, addr); - - /* Add a reference to dma to prevent the entire dma from - * being released during error handling. This reference - * will be freed after the pages are no longer used. - */ - get_page(alloc_frag->page); - dma->ref = 1; - alloc_frag->offset = sizeof(*dma); - - rq->last_dma = dma; + ++dma->ref; } - ++dma->ref; - buf = head + alloc_frag->offset; get_page(alloc_frag->page); @@ -975,9 +985,12 @@ static void virtnet_rq_set_premapped(struct virtnet_info *vi) if (!vi->mergeable_rx_bufs && vi->big_packets) return; - for (i = 0; i < vi->max_queue_pairs; i++) - /* error should never happen */ - BUG_ON(virtqueue_set_dma_premapped(vi->rq[i].vq)); + for (i = 0; i < vi->max_queue_pairs; i++) { + if (virtqueue_set_dma_premapped(vi->rq[i].vq)) + continue; + + vi->rq[i].do_dma = true; + } } static void virtnet_rq_unmap_free_buf(struct virtqueue *vq, void *buf) @@ -2430,7 +2443,8 @@ static int add_recvbuf_small(struct virtnet_info *vi, struct receive_queue *rq, err = virtqueue_add_inbuf_ctx(rq->vq, rq->sg, 1, buf, ctx, gfp); if (err < 0) { - virtnet_rq_unmap(rq, buf, 0); + if (rq->do_dma) + virtnet_rq_unmap(rq, buf, 0); put_page(virt_to_head_page(buf)); } @@ -2544,7 +2558,8 @@ static int add_recvbuf_mergeable(struct virtnet_info *vi, ctx = mergeable_len_to_ctx(len + room, headroom); err = virtqueue_add_inbuf_ctx(rq->vq, rq->sg, 1, buf, ctx, gfp); if (err < 0) { - virtnet_rq_unmap(rq, buf, 0); + if (rq->do_dma) + virtnet_rq_unmap(rq, buf, 0); put_page(virt_to_head_page(buf)); } @@ -5892,7 +5907,7 @@ static void free_receive_page_frags(struct virtnet_info *vi) int i; for (i = 0; i < vi->max_queue_pairs; i++) if (vi->rq[i].alloc_frag.page) { - if (vi->rq[i].last_dma) + if (vi->rq[i].do_dma && vi->rq[i].last_dma) virtnet_rq_unmap(&vi->rq[i], vi->rq[i].last_dma, 0); put_page(vi->rq[i].alloc_frag.page); }

1 year, 1 month

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FAILED: patch "[PATCH] platform/x86: panasonic-laptop: Allocate 1 entry extra in the" failed to apply to 4.19-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.19-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-4.19.y git checkout FETCH_HEAD git cherry-pick -x 33297cef3101d950cec0033a0dce0a2d2bd59999 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024091305-rephrase-pastime-be42@gregkh' --subject-prefix 'PATCH 4.19.y' HEAD^.. Possible dependencies: 33297cef3101 ("platform/x86: panasonic-laptop: Allocate 1 entry extra in the sinf array") f1aaf914654a ("platform/x86: panasonic-laptop: Replace ACPI prints with pr_*() macros") d5a81d8e864b ("platform/x86: panasonic-laptop: Add support for optical driver power in Y and W series") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 33297cef3101d950cec0033a0dce0a2d2bd59999 Mon Sep 17 00:00:00 2001 From: Hans de Goede <hdegoede(a)redhat.com> Date: Mon, 9 Sep 2024 13:32:26 +0200 Subject: [PATCH] platform/x86: panasonic-laptop: Allocate 1 entry extra in the sinf array MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Some DSDT-s have an off-by-one bug where the SINF package count is one higher than the SQTY reported value, allocate 1 entry extra. Also make the SQTY <-> SINF package count mismatch error more verbose to help debugging similar issues in the future. This fixes the panasonic-laptop driver failing to probe() on some devices with the following errors: [ 3.958887] SQTY reports bad SINF length SQTY: 37 SINF-pkg-count: 38 [ 3.958892] Couldn't retrieve BIOS data [ 3.983685] Panasonic Laptop Support - With Macros: probe of MAT0019:00 failed with error -5 Fixes: 709ee531c153 ("panasonic-laptop: add Panasonic Let's Note laptop extras driver v0.94") Cc: stable(a)vger.kernel.org Tested-by: James Harmison <jharmison(a)redhat.com> Signed-off-by: Hans de Goede <hdegoede(a)redhat.com> Link: https://lore.kernel.org/r/20240909113227.254470-2-hdegoede@redhat.com Reviewed-by: Ilpo Järvinen <ilpo.jarvinen(a)linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen(a)linux.intel.com> diff --git a/drivers/platform/x86/panasonic-laptop.c b/drivers/platform/x86/panasonic-laptop.c index 39044119d2a6..ebd81846e2d5 100644 --- a/drivers/platform/x86/panasonic-laptop.c +++ b/drivers/platform/x86/panasonic-laptop.c @@ -337,7 +337,8 @@ static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc) } if (pcc->num_sifr < hkey->package.count) { - pr_err("SQTY reports bad SINF length\n"); + pr_err("SQTY reports bad SINF length SQTY: %lu SINF-pkg-count: %u\n", + pcc->num_sifr, hkey->package.count); status = AE_ERROR; goto end; } @@ -994,6 +995,12 @@ static int acpi_pcc_hotkey_add(struct acpi_device *device) return -ENODEV; } + /* + * Some DSDT-s have an off-by-one bug where the SINF package count is + * one higher than the SQTY reported value, allocate 1 entry extra. + */ + num_sifr++; + pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL); if (!pcc) { pr_err("Couldn't allocate mem for pcc");

1 year, 1 month

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FAILED: patch "[PATCH] platform/x86: panasonic-laptop: Allocate 1 entry extra in the" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-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-5.4.y git checkout FETCH_HEAD git cherry-pick -x 33297cef3101d950cec0033a0dce0a2d2bd59999 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024091304-unwary-translate-85c3@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: 33297cef3101 ("platform/x86: panasonic-laptop: Allocate 1 entry extra in the sinf array") f1aaf914654a ("platform/x86: panasonic-laptop: Replace ACPI prints with pr_*() macros") d5a81d8e864b ("platform/x86: panasonic-laptop: Add support for optical driver power in Y and W series") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 33297cef3101d950cec0033a0dce0a2d2bd59999 Mon Sep 17 00:00:00 2001 From: Hans de Goede <hdegoede(a)redhat.com> Date: Mon, 9 Sep 2024 13:32:26 +0200 Subject: [PATCH] platform/x86: panasonic-laptop: Allocate 1 entry extra in the sinf array MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Some DSDT-s have an off-by-one bug where the SINF package count is one higher than the SQTY reported value, allocate 1 entry extra. Also make the SQTY <-> SINF package count mismatch error more verbose to help debugging similar issues in the future. This fixes the panasonic-laptop driver failing to probe() on some devices with the following errors: [ 3.958887] SQTY reports bad SINF length SQTY: 37 SINF-pkg-count: 38 [ 3.958892] Couldn't retrieve BIOS data [ 3.983685] Panasonic Laptop Support - With Macros: probe of MAT0019:00 failed with error -5 Fixes: 709ee531c153 ("panasonic-laptop: add Panasonic Let's Note laptop extras driver v0.94") Cc: stable(a)vger.kernel.org Tested-by: James Harmison <jharmison(a)redhat.com> Signed-off-by: Hans de Goede <hdegoede(a)redhat.com> Link: https://lore.kernel.org/r/20240909113227.254470-2-hdegoede@redhat.com Reviewed-by: Ilpo Järvinen <ilpo.jarvinen(a)linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen(a)linux.intel.com> diff --git a/drivers/platform/x86/panasonic-laptop.c b/drivers/platform/x86/panasonic-laptop.c index 39044119d2a6..ebd81846e2d5 100644 --- a/drivers/platform/x86/panasonic-laptop.c +++ b/drivers/platform/x86/panasonic-laptop.c @@ -337,7 +337,8 @@ static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc) } if (pcc->num_sifr < hkey->package.count) { - pr_err("SQTY reports bad SINF length\n"); + pr_err("SQTY reports bad SINF length SQTY: %lu SINF-pkg-count: %u\n", + pcc->num_sifr, hkey->package.count); status = AE_ERROR; goto end; } @@ -994,6 +995,12 @@ static int acpi_pcc_hotkey_add(struct acpi_device *device) return -ENODEV; } + /* + * Some DSDT-s have an off-by-one bug where the SINF package count is + * one higher than the SQTY reported value, allocate 1 entry extra. + */ + num_sifr++; + pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL); if (!pcc) { pr_err("Couldn't allocate mem for pcc");

1 year, 1 month

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FAILED: patch "[PATCH] platform/x86: panasonic-laptop: Allocate 1 entry extra in the" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-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-5.10.y git checkout FETCH_HEAD git cherry-pick -x 33297cef3101d950cec0033a0dce0a2d2bd59999 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024091303-dash-sensitive-4aee@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: 33297cef3101 ("platform/x86: panasonic-laptop: Allocate 1 entry extra in the sinf array") f1aaf914654a ("platform/x86: panasonic-laptop: Replace ACPI prints with pr_*() macros") d5a81d8e864b ("platform/x86: panasonic-laptop: Add support for optical driver power in Y and W series") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 33297cef3101d950cec0033a0dce0a2d2bd59999 Mon Sep 17 00:00:00 2001 From: Hans de Goede <hdegoede(a)redhat.com> Date: Mon, 9 Sep 2024 13:32:26 +0200 Subject: [PATCH] platform/x86: panasonic-laptop: Allocate 1 entry extra in the sinf array MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Some DSDT-s have an off-by-one bug where the SINF package count is one higher than the SQTY reported value, allocate 1 entry extra. Also make the SQTY <-> SINF package count mismatch error more verbose to help debugging similar issues in the future. This fixes the panasonic-laptop driver failing to probe() on some devices with the following errors: [ 3.958887] SQTY reports bad SINF length SQTY: 37 SINF-pkg-count: 38 [ 3.958892] Couldn't retrieve BIOS data [ 3.983685] Panasonic Laptop Support - With Macros: probe of MAT0019:00 failed with error -5 Fixes: 709ee531c153 ("panasonic-laptop: add Panasonic Let's Note laptop extras driver v0.94") Cc: stable(a)vger.kernel.org Tested-by: James Harmison <jharmison(a)redhat.com> Signed-off-by: Hans de Goede <hdegoede(a)redhat.com> Link: https://lore.kernel.org/r/20240909113227.254470-2-hdegoede@redhat.com Reviewed-by: Ilpo Järvinen <ilpo.jarvinen(a)linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen(a)linux.intel.com> diff --git a/drivers/platform/x86/panasonic-laptop.c b/drivers/platform/x86/panasonic-laptop.c index 39044119d2a6..ebd81846e2d5 100644 --- a/drivers/platform/x86/panasonic-laptop.c +++ b/drivers/platform/x86/panasonic-laptop.c @@ -337,7 +337,8 @@ static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc) } if (pcc->num_sifr < hkey->package.count) { - pr_err("SQTY reports bad SINF length\n"); + pr_err("SQTY reports bad SINF length SQTY: %lu SINF-pkg-count: %u\n", + pcc->num_sifr, hkey->package.count); status = AE_ERROR; goto end; } @@ -994,6 +995,12 @@ static int acpi_pcc_hotkey_add(struct acpi_device *device) return -ENODEV; } + /* + * Some DSDT-s have an off-by-one bug where the SINF package count is + * one higher than the SQTY reported value, allocate 1 entry extra. + */ + num_sifr++; + pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL); if (!pcc) { pr_err("Couldn't allocate mem for pcc");

1 year, 1 month

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