Re: [ACPI] RFC: ACPI table overflow handling

From: Len Brown
Date: Wed Jan 28 2004 - 00:24:36 EST

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Accepted.

thanks Jes, Bjorn,
-Len

On Tue, 2004-01-13 at 04:49, Jes Sorensen wrote:
> >>>>> "Bjorn" == Bjorn Helgaas <bjorn.helgaas@xxxxxx> writes:
>
> Bjorn> On Sunday 11 January 2004 7:30 am, Jes Sorensen wrote:
> >> (acpi_table_parse_madt(ACPI_MADT_IOSAPIC, acpi_parse_iosapic, 256)
>
> Bjorn> The "256" looks like it's based on the "iosapic_lists[256]"
> Bjorn> definition. We probably should introduce a #define for those
> Bjorn> cases (sorry, I should have noticed this the first time).
>
> No problem, easy fix.
>
> >> +++ linux-2.6.0-test11-ia64/arch/x86_64/kernel/acpi/boot.c Sun Jan
> >> 11 05:31:58 2004 + result =
> Bjorn> Is NO_IRQ_VECTORS a typo for NR_IRQ_VECTORS?
>
> Yup typo, thanks for catching this one.
>
> >> +++ linux-2.6.0-test11-ia64/drivers/acpi/numa.c Thu Jan 8 02:49:24
> >> 2004 acpi_table_parse_srat ( enum acpi_srat_entry_id id, -
> >> acpi_madt_entry_handler handler) + acpi_madt_entry_handler handler,
> >> + int max_entries)
>
> Bjorn> Should "max_entries" be unsigned? I notice you used unsigned
> Bjorn> types in the implementation, i.e., "count".
>
> I have no strong preference since I find it unlikely that anyone will
> want to loop it 2^31 times, but for esthetics lets make it unsigned.
>
> How about this one then?
>
> Cheers,
> Jes
>
> diff -urN -X /usr/people/jes/exclude-linux --exclude=io --exclude=sn
> --exclude='qla1280.[ch]'
> orig/linux-2.6.0-test11-ia64/arch/i386/kernel/acpi/boot.c
> linux-2.6.0-test11-ia64/arch/i386/kernel/acpi/boot.c
> --- orig/linux-2.6.0-test11-ia64/arch/i386/kernel/acpi/boot.c Wed
> Nov 26 12:45:28 2003
> +++ linux-2.6.0-test11-ia64/arch/i386/kernel/acpi/boot.c Sun
> Jan 11 05:16:24 2004
> @@ -44,8 +44,8 @@
> extern int acpi_irq;
> extern int acpi_ht;
>
> -int acpi_lapic = 0;
> -int acpi_ioapic = 0;
> +int acpi_lapic;
> +int acpi_ioapic;
>
> /*
> --------------------------------------------------------------------------
> Boot-time Configuration
> @@ -418,7 +418,7 @@
> * and (optionally) overriden by a LAPIC_ADDR_OVR entry
> (64-bit value).
> */
>
> - result = acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR,
> acpi_parse_lapic_addr_ovr);
> + result = acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR,
> acpi_parse_lapic_addr_ovr, 0);
> if (result < 0) {
> printk(KERN_ERR PREFIX "Error parsing LAPIC address
> override entry\n");
> return result;
> @@ -426,7 +426,8 @@
>
> mp_register_lapic_address(acpi_lapic_addr);
>
> - result = acpi_table_parse_madt(ACPI_MADT_LAPIC,
> acpi_parse_lapic);
> + result = acpi_table_parse_madt(ACPI_MADT_LAPIC,
> acpi_parse_lapic,
> + MAX_APICS);
> if (!result) {
> printk(KERN_ERR PREFIX "No LAPIC entries present\n");
> /* TBD: Cleanup to allow fallback to MPS */
> @@ -438,7 +439,7 @@
> return result;
> }
>
> - result = acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI,
> acpi_parse_lapic_nmi);
> + result = acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI,
> acpi_parse_lapic_nmi, 0);
> if (result < 0) {
> printk(KERN_ERR PREFIX "Error parsing LAPIC NMI
> entry\n");
> /* TBD: Cleanup to allow fallback to MPS */
> @@ -475,8 +476,8 @@
> return 1;
> }
>
> - result = acpi_table_parse_madt(ACPI_MADT_IOAPIC,
> acpi_parse_ioapic);
> - if (!result) {
> + result = acpi_table_parse_madt(ACPI_MADT_IOAPIC,
> acpi_parse_ioapic, MAX_IO_APICS);
> + if (!result) {
> printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
> return -ENODEV;
> }
> @@ -488,14 +489,14 @@
> /* Build a default routing table for legacy (ISA) interrupts.
> */
> mp_config_acpi_legacy_irqs();
>
> - result = acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR,
> acpi_parse_int_src_ovr);
> + result = acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR,
> acpi_parse_int_src_ovr, NR_IRQ_VECTORS);
> if (result < 0) {
> printk(KERN_ERR PREFIX "Error parsing interrupt source
> overrides entry\n");
> /* TBD: Cleanup to allow fallback to MPS */
> return result;
> }
>
> - result = acpi_table_parse_madt(ACPI_MADT_NMI_SRC,
> acpi_parse_nmi_src);
> + result = acpi_table_parse_madt(ACPI_MADT_NMI_SRC,
> acpi_parse_nmi_src, NR_IRQ_VECTORS);
> if (result < 0) {
> printk(KERN_ERR PREFIX "Error parsing NMI SRC
> entry\n");
> /* TBD: Cleanup to allow fallback to MPS */
> diff -urN -X /usr/people/jes/exclude-linux --exclude=io --exclude=sn
> --exclude='qla1280.[ch]'
> orig/linux-2.6.0-test11-ia64/arch/ia64/kernel/acpi.c
> linux-2.6.0-test11-ia64/arch/ia64/kernel/acpi.c
> --- orig/linux-2.6.0-test11-ia64/arch/ia64/kernel/acpi.c Wed
> Nov 26 12:44:07 2003
> +++ linux-2.6.0-test11-ia64/arch/ia64/kernel/acpi.c Tue Jan 13
> 01:30:49 2004
> @@ -189,8 +189,6 @@
>
> if (!lsapic->flags.enabled)
> printk(" disabled");
> - else if (available_cpus >= NR_CPUS)
> - printk(" ignored (increase NR_CPUS)");
> else {
> printk(" enabled");
> #ifdef CONFIG_SMP
> @@ -393,12 +391,6 @@
> size = ma->length_hi;
> size = (size << 32) | ma->length_lo;
>
> - if (num_memblks >= NR_MEMBLKS) {
> - printk(KERN_ERR "Too many mem chunks in SRAT. Ignoring
> %ld MBytes at %lx\n",
> - size/(1024*1024), paddr);
> - return;
> - }
> -
> /* Ignore disabled entries */
> if (!ma->flags.enabled)
> return;
> @@ -550,29 +542,29 @@
>
> /* Local APIC */
>
> - if (acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR,
> acpi_parse_lapic_addr_ovr) < 0)
> + if (acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR,
> acpi_parse_lapic_addr_ovr, 0) < 0)
> printk(KERN_ERR PREFIX "Error parsing LAPIC address
> override entry\n");
>
> - if (acpi_table_parse_madt(ACPI_MADT_LSAPIC, acpi_parse_lsapic)
> < 1)
> + if (acpi_table_parse_madt(ACPI_MADT_LSAPIC, acpi_parse_lsapic,
> NR_CPUS) < 1)
> printk(KERN_ERR PREFIX "Error parsing MADT - no LAPIC
> entries\n");
>
> - if (acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI,
> acpi_parse_lapic_nmi) < 0)
> + if (acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI,
> acpi_parse_lapic_nmi, 0) < 0)
> printk(KERN_ERR PREFIX "Error parsing LAPIC NMI
> entry\n");
>
> /* I/O APIC */
>
> - if (acpi_table_parse_madt(ACPI_MADT_IOSAPIC,
> acpi_parse_iosapic) < 1)
> + if (acpi_table_parse_madt(ACPI_MADT_IOSAPIC,
> acpi_parse_iosapic, NR_IOSAPICS) < 1)
> printk(KERN_ERR PREFIX "Error parsing MADT - no
> IOSAPIC entries\n");
>
> /* System-Level Interrupt Routing */
>
> - if (acpi_table_parse_madt(ACPI_MADT_PLAT_INT_SRC,
> acpi_parse_plat_int_src) < 0)
> + if (acpi_table_parse_madt(ACPI_MADT_PLAT_INT_SRC,
> acpi_parse_plat_int_src, ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
> printk(KERN_ERR PREFIX "Error parsing platform
> interrupt source entry\n");
>
> - if (acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR,
> acpi_parse_int_src_ovr) < 0)
> + if (acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR,
> acpi_parse_int_src_ovr, 0) < 0)
> printk(KERN_ERR PREFIX "Error parsing interrupt source
> overrides entry\n");
>
> - if (acpi_table_parse_madt(ACPI_MADT_NMI_SRC,
> acpi_parse_nmi_src) < 0)
> + if (acpi_table_parse_madt(ACPI_MADT_NMI_SRC,
> acpi_parse_nmi_src, 0) < 0)
> printk(KERN_ERR PREFIX "Error parsing NMI SRC
> entry\n");
> skip_madt:
>
> diff -urN -X /usr/people/jes/exclude-linux --exclude=io --exclude=sn
> --exclude='qla1280.[ch]'
> orig/linux-2.6.0-test11-ia64/arch/ia64/kernel/iosapic.c
> linux-2.6.0-test11-ia64/arch/ia64/kernel/iosapic.c
> --- orig/linux-2.6.0-test11-ia64/arch/ia64/kernel/iosapic.c Wed
> Nov 26 12:44:02 2003
> +++ linux-2.6.0-test11-ia64/arch/ia64/kernel/iosapic.c Tue Jan 13
> 01:29:44 2004
> @@ -114,7 +114,7 @@
> char *addr; /* base address of IOSAPIC */
> unsigned int gsi_base; /* first GSI assigned to this
> IOSAPIC */
> unsigned short num_rte; /* number of RTE in this
> IOSAPIC */
> -} iosapic_lists[256];
> +} iosapic_lists[NR_IOSAPICS];
>
> static int num_iosapic;
>
> diff -urN -X /usr/people/jes/exclude-linux --exclude=io --exclude=sn
> --exclude='qla1280.[ch]'
> orig/linux-2.6.0-test11-ia64/arch/x86_64/kernel/acpi/boot.c
> linux-2.6.0-test11-ia64/arch/x86_64/kernel/acpi/boot.c
> --- orig/linux-2.6.0-test11-ia64/arch/x86_64/kernel/acpi/boot.c Wed
> Nov 26 12:43:24 2003
> +++ linux-2.6.0-test11-ia64/arch/x86_64/kernel/acpi/boot.c Tue
> Jan 13 00:33:45 2004
> @@ -46,8 +46,8 @@
> #include <asm/proto.h>
> #include <asm/tlbflush.h>
>
> -int acpi_lapic = 0;
> -int acpi_ioapic = 0;
> +int acpi_lapic;
> +int acpi_ioapic;
>
> #define PREFIX "ACPI: "
>
> @@ -398,7 +398,7 @@
> * and (optionally) overriden by a LAPIC_ADDR_OVR entry
> (64-bit value).
> */
>
> - result = acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR,
> acpi_parse_lapic_addr_ovr);
> + result = acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR,
> acpi_parse_lapic_addr_ovr, 0);
> if (result < 0) {
> printk(KERN_ERR PREFIX "Error parsing LAPIC address
> override entry\n");
> return result;
> @@ -406,7 +406,8 @@
>
> mp_register_lapic_address(acpi_lapic_addr);
>
> - result = acpi_table_parse_madt(ACPI_MADT_LAPIC,
> acpi_parse_lapic);
> + result = acpi_table_parse_madt(ACPI_MADT_LAPIC,
> acpi_parse_lapic,
> + MAX_APICS);
> if (!result) {
> printk(KERN_ERR PREFIX "No LAPIC entries present\n");
> /* TBD: Cleanup to allow fallback to MPS */
> @@ -418,7 +419,7 @@
> return result;
> }
>
> - result = acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI,
> acpi_parse_lapic_nmi);
> + result = acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI,
> acpi_parse_lapic_nmi, 0);
> if (result < 0) {
> printk(KERN_ERR PREFIX "Error parsing LAPIC NMI
> entry\n");
> /* TBD: Cleanup to allow fallback to MPS */
> @@ -455,8 +456,8 @@
> return 1;
> }
>
> - result = acpi_table_parse_madt(ACPI_MADT_IOAPIC,
> acpi_parse_ioapic);
> - if (!result) {
> + result = acpi_table_parse_madt(ACPI_MADT_IOAPIC,
> acpi_parse_ioapic, MAX_IO_APICS);
> + if (!result) {
> printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
> return -ENODEV;
> }
> @@ -468,14 +469,15 @@
> /* Build a default routing table for legacy (ISA) interrupts.
> */
> mp_config_acpi_legacy_irqs();
>
> - result = acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR,
> acpi_parse_int_src_ovr);
> + result = acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR,
> acpi_parse_int_src_ovr, NR_IRQ_VECTORS);
> if (result < 0) {
> printk(KERN_ERR PREFIX "Error parsing interrupt source
> overrides entry\n");
> /* TBD: Cleanup to allow fallback to MPS */
> return result;
> }
>
> - result = acpi_table_parse_madt(ACPI_MADT_NMI_SRC,
> acpi_parse_nmi_src);
> + result = acpi_table_parse_madt(ACPI_MADT_NMI_SRC,
> acpi_parse_nmi_src,
> + NR_IRQ_VECTORS);
> if (result < 0) {
> printk(KERN_ERR PREFIX "Error parsing NMI SRC
> entry\n");
> /* TBD: Cleanup to allow fallback to MPS */
> diff -urN -X /usr/people/jes/exclude-linux --exclude=io --exclude=sn
> --exclude='qla1280.[ch]'
> orig/linux-2.6.0-test11-ia64/drivers/acpi/numa.c
> linux-2.6.0-test11-ia64/drivers/acpi/numa.c
> --- orig/linux-2.6.0-test11-ia64/drivers/acpi/numa.c Thu Dec 11
> 04:22:40 2003
> +++ linux-2.6.0-test11-ia64/drivers/acpi/numa.c Tue Jan 13 00:49:40
> 2004
> @@ -38,7 +38,7 @@
> #define Dprintk(x...)
> #endif
>
> -extern int __init acpi_table_parse_madt_family (enum acpi_table_id
> id, unsigned long madt_size, int entry_id, acpi_madt_entry_handler
> handler);
> +extern int __init acpi_table_parse_madt_family (enum acpi_table_id
> id, unsigned long madt_size, int entry_id, acpi_madt_entry_handler
> handler, unsigned int max_entries);
>
> void __init
> acpi_table_print_srat_entry (
> @@ -156,10 +156,11 @@
> int __init
> acpi_table_parse_srat (
> enum acpi_srat_entry_id id,
> - acpi_madt_entry_handler handler)
> + acpi_madt_entry_handler handler,
> + unsigned int max_entries)
> {
> return acpi_table_parse_madt_family(ACPI_SRAT, sizeof(struct
> acpi_table_srat),
> - id, handler);
> + id, handler, max_entries);
> }
>
>
> @@ -173,9 +174,11 @@
>
> if (result > 0) {
> result =
> acpi_table_parse_srat(ACPI_SRAT_PROCESSOR_AFFINITY,
> -
> acpi_parse_processor_affinity);
> +
> acpi_parse_processor_affinity,
> + NR_CPUS);
> result =
> acpi_table_parse_srat(ACPI_SRAT_MEMORY_AFFINITY,
> -
> acpi_parse_memory_affinity);
> +
> acpi_parse_memory_affinity,
> + NR_MEMBLKS);
> } else {
> /* FIXME */
> printk("Warning: acpi_table_parse(ACPI_SRAT) returned
> %d!\n",result);
> diff -urN -X /usr/people/jes/exclude-linux --exclude=io --exclude=sn
> --exclude='qla1280.[ch]'
> orig/linux-2.6.0-test11-ia64/drivers/acpi/tables.c
> linux-2.6.0-test11-ia64/drivers/acpi/tables.c
> --- orig/linux-2.6.0-test11-ia64/drivers/acpi/tables.c Thu Dec 11
> 04:22:40 2003
> +++ linux-2.6.0-test11-ia64/drivers/acpi/tables.c Tue Jan 13
> 00:52:36 2004
> @@ -295,13 +295,14 @@
> enum acpi_table_id id,
> unsigned long madt_size,
> int entry_id,
> - acpi_madt_entry_handler handler)
> + acpi_madt_entry_handler handler,
> + unsigned int max_entries)
> {
> void *madt = NULL;
> - acpi_table_entry_header *entry = NULL;
> - unsigned long count = 0;
> - unsigned long madt_end = 0;
> - unsigned int i = 0;
> + acpi_table_entry_header *entry;
> + unsigned int count = 0;
> + unsigned long madt_end;
> + unsigned int i;
>
> if (!handler)
> return -EINVAL;
> @@ -335,13 +336,18 @@
> ((unsigned long) madt + madt_size);
>
> while (((unsigned long) entry) < madt_end) {
> - if (entry->type == entry_id) {
> - count++;
> + if (entry->type == entry_id &&
> + (!max_entries || count++ < max_entries))
> handler(entry);
> - }
> +
> entry = (acpi_table_entry_header *)
> ((unsigned long) entry + entry->length);
> }
> + if (max_entries && count > max_entries) {
> + printk(KERN_WARNING PREFIX "[%s:0x%02x] ignored %i
> entries of "
> + "%i found\n", acpi_table_signatures[id],
> entry_id,
> + count - max_entries, count);
> + }
>
> return count;
> }
> @@ -350,10 +356,11 @@
> int __init
> acpi_table_parse_madt (
> enum acpi_madt_entry_id id,
> - acpi_madt_entry_handler handler)
> + acpi_madt_entry_handler handler,
> + unsigned int max_entries)
> {
> return acpi_table_parse_madt_family(ACPI_APIC, sizeof(struct
> acpi_table_madt),
> - id, handler);
> + id, handler, max_entries);
> }
>
>
> @@ -578,4 +585,3 @@
>
> return 0;
> }
> -
> diff -urN -X /usr/people/jes/exclude-linux --exclude=io --exclude=sn
> --exclude='qla1280.[ch]'
> orig/linux-2.6.0-test11-ia64/include/asm-ia64/iosapic.h
> linux-2.6.0-test11-ia64/include/asm-ia64/iosapic.h
> --- orig/linux-2.6.0-test11-ia64/include/asm-ia64/iosapic.h Wed
> Nov 26 12:44:21 2003
> +++ linux-2.6.0-test11-ia64/include/asm-ia64/iosapic.h Tue Jan 13
> 01:30:32 2004
> @@ -52,6 +52,9 @@
> #ifndef __ASSEMBLY__
>
> #ifdef CONFIG_IOSAPIC
> +
> +#define NR_IOSAPICS 256
> +
> extern void __init iosapic_system_init (int pcat_compat);
> extern void __init iosapic_init (unsigned long address,
> unsigned int gsi_base);
> diff -urN -X /usr/people/jes/exclude-linux --exclude=io --exclude=sn
> --exclude='qla1280.[ch]'
> orig/linux-2.6.0-test11-ia64/include/linux/acpi.h
> linux-2.6.0-test11-ia64/include/linux/acpi.h
> --- orig/linux-2.6.0-test11-ia64/include/linux/acpi.h Wed Nov 26
> 12:42:43 2003
> +++ linux-2.6.0-test11-ia64/include/linux/acpi.h Tue Jan 13
> 00:51:02 2004
> @@ -355,8 +355,8 @@
> int acpi_table_init (void);
> int acpi_table_parse (enum acpi_table_id id, acpi_table_handler
> handler);
> int acpi_get_table_header_early (enum acpi_table_id id, struct
> acpi_table_header **header);
> -int acpi_table_parse_madt (enum acpi_madt_entry_id id,
> acpi_madt_entry_handler handler);
> -int acpi_table_parse_srat (enum acpi_srat_entry_id id,
> acpi_madt_entry_handler handler);
> +int acpi_table_parse_madt (enum acpi_madt_entry_id id,
> acpi_madt_entry_handler handler, unsigned int max_entries);
> +int acpi_table_parse_srat (enum acpi_srat_entry_id id,
> acpi_madt_entry_handler handler, unsigned int max_entries);
> void acpi_table_print (struct acpi_table_header *header, unsigned
> long phys_addr);
> void acpi_table_print_madt_entry (acpi_table_entry_header *madt);
> void acpi_table_print_srat_entry (acpi_table_entry_header *srat);
>
>
>
>
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