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openSUSE:12.2
xen
23575-x86-DMI.patch
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File 23575-x86-DMI.patch of Package xen
References: fate#311376, fate#311529, bnc#578927, bnc#628554 # HG changeset patch # User Jan Beulich <jbeulich@novell.com> # Date 1308825280 -3600 # Node ID 4d9598a6a7777c50e109d7e2eb6d1cb28bcb4509 # Parent d7644abc218d3232b9d957ce94fc4b4bcc1f456e x86/DMI: use proper structures instead of byte offsets Besides being (in my eyes) desirable cleanup, this at once represents another prerequisite for native EFI booting support. Signed-off-by: Jan Beulich <jbeulich@novell.com> Index: xen-4.1.2-testing/xen/arch/x86/dmi_scan.c =================================================================== --- xen-4.1.2-testing.orig/xen/arch/x86/dmi_scan.c +++ xen-4.1.2-testing/xen/arch/x86/dmi_scan.c @@ -10,11 +10,31 @@ #include <asm/system.h> #include <xen/dmi.h> -#define bt_ioremap(b,l) ((u8 *)__acpi_map_table(b,l)) +#define bt_ioremap(b,l) ((void *)__acpi_map_table(b,l)) #define bt_iounmap(b,l) ((void)0) #define memcpy_fromio memcpy #define alloc_bootmem(l) xmalloc_bytes(l) +struct dmi_eps { + char anchor[5]; /* "_DMI_" */ + u8 checksum; + u16 size; + u32 address; + u16 num_structures; + u8 revision; +} __attribute__((packed)); + +struct smbios_eps { + char anchor[4]; /* "_SM_" */ + u8 checksum; + u8 length; + u8 major, minor; + u16 max_size; + u8 revision; + u8 _rsrvd_[5]; + struct dmi_eps dmi; +} __attribute__((packed)); + struct dmi_header { u8 type; @@ -90,62 +110,70 @@ static int __init dmi_table(u32 base, in } -inline static int __init dmi_checksum(u8 *buf) +static inline bool_t __init dmi_checksum(const void __iomem *buf, + unsigned int len) { - u8 sum=0; - int a; + u8 sum = 0; + const u8 *p = buf; + unsigned int a; - for(a=0; a<15; a++) - sum+=buf[a]; - return (sum==0); + for (a = 0; a < len; a++) + sum += p[a]; + return sum == 0; } int __init dmi_get_table(u32 *base, u32 *len) { - u8 buf[15]; + struct dmi_eps eps; char __iomem *p, *q; p = maddr_to_virt(0xF0000); for (q = p; q < p + 0x10000; q += 16) { - memcpy_fromio(buf, q, 15); - if (memcmp(buf, "_DMI_", 5)==0 && dmi_checksum(buf)) { - *base=buf[11]<<24|buf[10]<<16|buf[9]<<8|buf[8]; - *len=buf[7]<<8|buf[6]; + memcpy_fromio(&eps, q, 15); + if (memcmp(eps.anchor, "_DMI_", 5) == 0 && + dmi_checksum(&eps, sizeof(eps))) { + *base = eps.address; + *len = eps.size; return 0; } } return -1; } +static int __init _dmi_iterate(const struct dmi_eps *dmi, + const struct smbios_eps __iomem *smbios, + void (*decode)(struct dmi_header *)) +{ + u16 num = dmi->num_structures; + u16 len = dmi->size; + u32 base = dmi->address; + + /* + * DMI version 0.0 means that the real version is taken from + * the SMBIOS version, which we may not know at this point. + */ + if (dmi->revision) + printk(KERN_INFO "DMI %d.%d present.\n", + dmi->revision >> 4, dmi->revision & 0x0f); + else if (!smbios) + printk(KERN_INFO "DMI present.\n"); + dmi_printk((KERN_INFO "%d structures occupying %d bytes.\n", + num, len)); + dmi_printk((KERN_INFO "DMI table at 0x%08X.\n", base)); + return dmi_table(base, len, num, decode); +} + static int __init dmi_iterate(void (*decode)(struct dmi_header *)) { - u8 buf[15]; + struct dmi_eps eps; char __iomem *p, *q; p = maddr_to_virt(0xF0000); for (q = p; q < p + 0x10000; q += 16) { - memcpy_fromio(buf, q, 15); - if (memcmp(buf, "_DMI_", 5)==0 && dmi_checksum(buf)) { - u16 num=buf[13]<<8|buf[12]; - u16 len=buf[7]<<8|buf[6]; - u32 base=buf[11]<<24|buf[10]<<16|buf[9]<<8|buf[8]; - - /* - * DMI version 0.0 means that the real version is taken from - * the SMBIOS version, which we don't know at this point. - */ - if(buf[14]!=0) - printk(KERN_INFO "DMI %d.%d present.\n", - buf[14]>>4, buf[14]&0x0F); - else - printk(KERN_INFO "DMI present.\n"); - dmi_printk((KERN_INFO "%d structures occupying %d bytes.\n", - num, len)); - dmi_printk((KERN_INFO "DMI table at 0x%08X.\n", - base)); - if(dmi_table(base,len, num, decode)==0) - return 0; - } + memcpy_fromio(&eps, q, sizeof(eps)); + if (memcmp(eps.anchor, "_DMI_", 5) == 0 && + dmi_checksum(&eps, sizeof(eps))) + return _dmi_iterate(&eps, NULL, decode); } return -1; }
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