From 3a80b6aa271eb08a3da1a04b5cbdcdc19d4a5ae0 Mon Sep 17 00:00:00 2001 From: FUJITA Tomonori Date: Mon, 8 Sep 2008 18:10:10 +0900 Subject: ia64: dma_alloc_coherent always use GFP_DMA This patch makes dma_alloc_coherent use GFP_DMA at all times. This is necessary for swiotlb, which requires the callers to set up the gfp flags properly. swiotlb_alloc_coherent tries to allocate pages with the gfp flags. If the allocated memory isn't fit for dev->coherent_dma_mask, swiotlb_alloc_coherent reserves some of the swiotlb memory area, which is precious resource. So the callers need to set up the gfp flags properly. This patch means that other IA64 IOMMUs' dma_alloc_coherent also use GFP_DMA. These IOMMUs (e.g. SBA IOMMU) don't need GFP_DMA since they can map a memory to any address. But IA64's GFP_DMA is large, generally drivers allocate small memory with dma_alloc_coherent only at startup. So I chose the simplest way to set up the gfp flags for swiotlb. Signed-off-by: FUJITA Tomonori Acked-by: Joerg Roedel Signed-off-by: Ingo Molnar --- arch/ia64/include/asm/dma-mapping.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'arch/ia64') diff --git a/arch/ia64/include/asm/dma-mapping.h b/arch/ia64/include/asm/dma-mapping.h index 9f0df9bd46b..06ff1ba2146 100644 --- a/arch/ia64/include/asm/dma-mapping.h +++ b/arch/ia64/include/asm/dma-mapping.h @@ -8,7 +8,9 @@ #include #include -#define dma_alloc_coherent platform_dma_alloc_coherent +#define dma_alloc_coherent(dev, size, handle, gfp) \ + platform_dma_alloc_coherent(dev, size, handle, (gfp) | GFP_DMA) + /* coherent mem. is cheap */ static inline void * dma_alloc_noncoherent(struct device *dev, size_t size, dma_addr_t *dma_handle, -- cgit v1.2.3 From e545a6140b698b2494daf0b32107bdcc5e901390 Mon Sep 17 00:00:00 2001 From: Manfred Spraul Date: Sun, 7 Sep 2008 16:57:22 +0200 Subject: kernel/cpu.c: create a CPU_STARTING cpu_chain notifier Right now, there is no notifier that is called on a new cpu, before the new cpu begins processing interrupts/softirqs. Various kernel function would need that notification, e.g. kvm works around by calling smp_call_function_single(), rcu polls cpu_online_map. The patch adds a CPU_STARTING notification. It also adds a helper function that sends the message to all cpu_chain handlers. Tested on x86-64. All other archs are untested. Especially on sparc, I'm not sure if I got it right. Signed-off-by: Manfred Spraul Signed-off-by: Ingo Molnar --- arch/ia64/kernel/smpboot.c | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/ia64') diff --git a/arch/ia64/kernel/smpboot.c b/arch/ia64/kernel/smpboot.c index bcea81e432f..333b58f218d 100644 --- a/arch/ia64/kernel/smpboot.c +++ b/arch/ia64/kernel/smpboot.c @@ -401,6 +401,7 @@ smp_callin (void) spin_lock(&vector_lock); /* Setup the per cpu irq handling data structures */ __setup_vector_irq(cpuid); + notify_cpu_starting(cpuid); cpu_set(cpuid, cpu_online_map); per_cpu(cpu_state, cpuid) = CPU_ONLINE; spin_unlock(&vector_lock); -- cgit v1.2.3 From 06f95ea8988513b172080c419e4be8826c55a318 Mon Sep 17 00:00:00 2001 From: Alex Chiang Date: Tue, 16 Sep 2008 18:25:33 -0600 Subject: [IA64] Ski simulator doesn't need check_sal_cache_flush Peter Chubb reported that commit 3463a93def55c309f3c0d0a8aaf216be3be42d64 (Update check_sal_cache_flush to use platform_send_ipi()) broke Ski because it does not implement IPIs. Tony Luck suggested we just #ifndef out the call (since the simulator does not have the SAL bug that this code is attempting to detect and workaround) Signed-off-by: Alex Chiang Signed-off-by: Tony Luck --- arch/ia64/kernel/setup.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/ia64') diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c index c27d5b2c182..de636b21567 100644 --- a/arch/ia64/kernel/setup.c +++ b/arch/ia64/kernel/setup.c @@ -616,7 +616,9 @@ setup_arch (char **cmdline_p) ia64_mca_init(); platform_setup(cmdline_p); +#ifndef CONFIG_IA64_HP_SIM check_sal_cache_flush(); +#endif paging_init(); } -- cgit v1.2.3 From d3758f87f39c5b072dde74c55bfb988262a3a45c Mon Sep 17 00:00:00 2001 From: Jay Lan Date: Mon, 22 Sep 2008 14:21:19 -0700 Subject: [IA64] kexec fails on systems with blocks of uncached memory Currently a memory segment in memory map with attribute of EFI_MEMORY_UC is denoted as "System RAM" in /proc/iomem, while memory of attribute (EFI_MEMORY_WB|EFI_MEMORY_UC) is also labeled the same. The kexec utility then includes uncached memory as part of vmcore. The kdump kernel MCA'ed when it tries to save the vmcore to a disk. A normal "cached" access may cause MCAs. This patch would label memory with attribute of EFI_MEMORY_UC only as "Uncached RAM" so that kexec would know not to include it in the vmcore. I will submit a separate kexec-tools patch to the kexec list. Signed-off-by: Jay Lan Acked-by: Simon Horman Signed-off-by: Tony Luck --- arch/ia64/kernel/efi.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'arch/ia64') diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c index d45f215bc8f..51b75cea701 100644 --- a/arch/ia64/kernel/efi.c +++ b/arch/ia64/kernel/efi.c @@ -1232,9 +1232,10 @@ efi_initialize_iomem_resources(struct resource *code_resource, if (md->attribute & EFI_MEMORY_WP) { name = "System ROM"; flags |= IORESOURCE_READONLY; - } else { + } else if (md->attribute == EFI_MEMORY_UC) + name = "Uncached RAM"; + else name = "System RAM"; - } break; case EFI_ACPI_MEMORY_NVS: -- cgit v1.2.3 From c459ce8b5a7d933a3bcf6915ab17ac1e036e2ac4 Mon Sep 17 00:00:00 2001 From: Tony Luck Date: Mon, 29 Sep 2008 16:39:19 -0700 Subject: [IA64] Put the space for cpu0 per-cpu area into .data section Initial fix for making sure that we can access percpu variables in all C code (commit: 10617bbe84628eb18ab5f723d3ba35005adde143) inadvertantly allocated the memory in the "percpu" section of the vmlinux ELF executable. This confused kexec/dump. Signed-off-by: Tony Luck --- arch/ia64/include/asm/sections.h | 3 +++ arch/ia64/kernel/head.S | 9 +++++---- arch/ia64/kernel/vmlinux.lds.S | 8 +++++--- arch/ia64/mm/contig.c | 2 +- arch/ia64/mm/discontig.c | 2 +- 5 files changed, 15 insertions(+), 9 deletions(-) (limited to 'arch/ia64') diff --git a/arch/ia64/include/asm/sections.h b/arch/ia64/include/asm/sections.h index f6679989103..1a873b36a4a 100644 --- a/arch/ia64/include/asm/sections.h +++ b/arch/ia64/include/asm/sections.h @@ -11,6 +11,9 @@ #include extern char __per_cpu_start[], __per_cpu_end[], __phys_per_cpu_start[]; +#ifdef CONFIG_SMP +extern char __cpu0_per_cpu[]; +#endif extern char __start___vtop_patchlist[], __end___vtop_patchlist[]; extern char __start___rse_patchlist[], __end___rse_patchlist[]; extern char __start___mckinley_e9_bundles[], __end___mckinley_e9_bundles[]; diff --git a/arch/ia64/kernel/head.S b/arch/ia64/kernel/head.S index 8bdea8eb62e..66e491d8baa 100644 --- a/arch/ia64/kernel/head.S +++ b/arch/ia64/kernel/head.S @@ -367,16 +367,17 @@ start_ap: ;; #else (isAP) br.few 2f - mov r20=r19 - sub r19=r19,r18 + movl r20=__cpu0_per_cpu ;; shr.u r18=r18,3 1: - ld8 r21=[r20],8;; - st8[r19]=r21,8 + ld8 r21=[r19],8;; + st8[r20]=r21,8 adds r18=-1,r18;; cmp4.lt p7,p6=0,r18 (p7) br.cond.dptk.few 1b + mov r19=r20 + ;; 2: #endif tpa r19=r19 diff --git a/arch/ia64/kernel/vmlinux.lds.S b/arch/ia64/kernel/vmlinux.lds.S index de71da811cd..10a7d47e851 100644 --- a/arch/ia64/kernel/vmlinux.lds.S +++ b/arch/ia64/kernel/vmlinux.lds.S @@ -215,9 +215,6 @@ SECTIONS /* Per-cpu data: */ percpu : { } :percpu . = ALIGN(PERCPU_PAGE_SIZE); -#ifdef CONFIG_SMP - . = . + PERCPU_PAGE_SIZE; /* cpu0 per-cpu space */ -#endif __phys_per_cpu_start = .; .data.percpu PERCPU_ADDR : AT(__phys_per_cpu_start - LOAD_OFFSET) { @@ -233,6 +230,11 @@ SECTIONS data : { } :data .data : AT(ADDR(.data) - LOAD_OFFSET) { +#ifdef CONFIG_SMP + . = ALIGN(PERCPU_PAGE_SIZE); + __cpu0_per_cpu = .; + . = . + PERCPU_PAGE_SIZE; /* cpu0 per-cpu space */ +#endif DATA_DATA *(.data1) *(.gnu.linkonce.d*) diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c index e566ff43884..0ee085efbe2 100644 --- a/arch/ia64/mm/contig.c +++ b/arch/ia64/mm/contig.c @@ -163,7 +163,7 @@ per_cpu_init (void) * get_zeroed_page(). */ if (first_time) { - void *cpu0_data = __phys_per_cpu_start - PERCPU_PAGE_SIZE; + void *cpu0_data = __cpu0_per_cpu; first_time=0; diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c index 78026aabaa7..d8c5fcd89e5 100644 --- a/arch/ia64/mm/discontig.c +++ b/arch/ia64/mm/discontig.c @@ -144,7 +144,7 @@ static void *per_cpu_node_setup(void *cpu_data, int node) for_each_possible_early_cpu(cpu) { if (cpu == 0) { - void *cpu0_data = __phys_per_cpu_start - PERCPU_PAGE_SIZE; + void *cpu0_data = __cpu0_per_cpu; __per_cpu_offset[cpu] = (char*)cpu0_data - __per_cpu_start; } else if (node == node_cpuid[cpu].nid) { -- cgit v1.2.3