AuxXxilium/linux_dsm_epyc7002
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Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

Browse Source 
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86/amd-iommu: Fix rounding-bug in __unmap_single
  x86/amd-iommu: Work around S3 BIOS bug
  x86/amd-iommu: Set iommu configuration flags in enable-loop
  x86, setup: Fix earlyprintk=serial,0x3f8,115200
  x86, setup: Fix earlyprintk=serial,ttyS0,115200
This commit is contained in:
Linus Torvalds 2010-09-27 12:22:21 -07:00
commit 6a6aa2b7e4
6 changed files with 82 additions and 24 deletions
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14
arch/x86/boot/early_serial_console.c
View File

@ -58,7 +58,19 @@ static void parse_earlyprintk(void)
if (arg[pos] == ',')
pos++;
if (!strncmp(arg, "ttyS", 4)) {
/*
* make sure we have
* "serial,0x3f8,115200"
* "serial,ttyS0,115200"
* "ttyS0,115200"
*/
if (pos == 7 && !strncmp(arg + pos, "0x", 2)) {
port = simple_strtoull(arg + pos, &e, 16);
if (port == 0 || arg + pos == e)
port = DEFAULT_SERIAL_PORT;
else
pos = e - arg;
} else if (!strncmp(arg + pos, "ttyS", 4)) {
static const int bases[] = { 0x3f8, 0x2f8 };
int idx = 0;

6
arch/x86/include/asm/amd_iommu_proto.h
View File

@ -38,4 +38,10 @@ static inline void amd_iommu_stats_init(void) { }
#endif /* !CONFIG_AMD_IOMMU_STATS */
static inline bool is_rd890_iommu(struct pci_dev *pdev)
{
return (pdev->vendor == PCI_VENDOR_ID_ATI) &&
(pdev->device == PCI_DEVICE_ID_RD890_IOMMU);
}
#endif /* _ASM_X86_AMD_IOMMU_PROTO_H */

12
arch/x86/include/asm/amd_iommu_types.h
View File

@ -368,6 +368,9 @@ struct amd_iommu {
/* capabilities of that IOMMU read from ACPI */
u32 cap;
/* flags read from acpi table */
u8 acpi_flags;
/*
* Capability pointer. There could be more than one IOMMU per PCI
* device function if there are more than one AMD IOMMU capability
@ -411,6 +414,15 @@ struct amd_iommu {
/* default dma_ops domain for that IOMMU */
struct dma_ops_domain *default_dom;
/*
* This array is required to work around a potential BIOS bug.
* The BIOS may miss to restore parts of the PCI configuration
* space when the system resumes from S3. The result is that the
* IOMMU does not execute commands anymore which leads to system
* failure.
*/
u32 cache_cfg[4];
};
/*

4
arch/x86/kernel/amd_iommu.c
View File

@ -1953,6 +1953,7 @@ static void __unmap_single(struct dma_ops_domain *dma_dom,
size_t size,
int dir)
{
dma_addr_t flush_addr;
dma_addr_t i, start;
unsigned int pages;
@ -1960,6 +1961,7 @@ static void __unmap_single(struct dma_ops_domain *dma_dom,
(dma_addr + size > dma_dom->aperture_size))
return;
flush_addr = dma_addr;
pages = iommu_num_pages(dma_addr, size, PAGE_SIZE);
dma_addr &= PAGE_MASK;
start = dma_addr;
@ -1974,7 +1976,7 @@ static void __unmap_single(struct dma_ops_domain *dma_dom,
dma_ops_free_addresses(dma_dom, dma_addr, pages);
if (amd_iommu_unmap_flush || dma_dom->need_flush) {
iommu_flush_pages(&dma_dom->domain, dma_addr, size);
iommu_flush_pages(&dma_dom->domain, flush_addr, size);
dma_dom->need_flush = false;
}
}

67
arch/x86/kernel/amd_iommu_init.c
View File

@ -632,6 +632,13 @@ static void __init init_iommu_from_pci(struct amd_iommu *iommu)
iommu->last_device = calc_devid(MMIO_GET_BUS(range),
MMIO_GET_LD(range));
iommu->evt_msi_num = MMIO_MSI_NUM(misc);
if (is_rd890_iommu(iommu->dev)) {
pci_read_config_dword(iommu->dev, 0xf0, &iommu->cache_cfg[0]);
pci_read_config_dword(iommu->dev, 0xf4, &iommu->cache_cfg[1]);
pci_read_config_dword(iommu->dev, 0xf8, &iommu->cache_cfg[2]);
pci_read_config_dword(iommu->dev, 0xfc, &iommu->cache_cfg[3]);
}
}
/*
@ -649,29 +656,9 @@ static void __init init_iommu_from_acpi(struct amd_iommu *iommu,
struct ivhd_entry *e;
/*
* First set the recommended feature enable bits from ACPI
* into the IOMMU control registers
* First save the recommended feature enable bits from ACPI
*/
h->flags & IVHD_FLAG_HT_TUN_EN_MASK ?
iommu_feature_enable(iommu, CONTROL_HT_TUN_EN) :
iommu_feature_disable(iommu, CONTROL_HT_TUN_EN);
h->flags & IVHD_FLAG_PASSPW_EN_MASK ?
iommu_feature_enable(iommu, CONTROL_PASSPW_EN) :
iommu_feature_disable(iommu, CONTROL_PASSPW_EN);
h->flags & IVHD_FLAG_RESPASSPW_EN_MASK ?
iommu_feature_enable(iommu, CONTROL_RESPASSPW_EN) :
iommu_feature_disable(iommu, CONTROL_RESPASSPW_EN);
h->flags & IVHD_FLAG_ISOC_EN_MASK ?
iommu_feature_enable(iommu, CONTROL_ISOC_EN) :
iommu_feature_disable(iommu, CONTROL_ISOC_EN);
/*
* make IOMMU memory accesses cache coherent
*/
iommu_feature_enable(iommu, CONTROL_COHERENT_EN);
iommu->acpi_flags = h->flags;
/*
* Done. Now parse the device entries
@ -1116,6 +1103,40 @@ static void init_device_table(void)
}
}
static void iommu_init_flags(struct amd_iommu *iommu)
{
iommu->acpi_flags & IVHD_FLAG_HT_TUN_EN_MASK ?
iommu_feature_enable(iommu, CONTROL_HT_TUN_EN) :
iommu_feature_disable(iommu, CONTROL_HT_TUN_EN);
iommu->acpi_flags & IVHD_FLAG_PASSPW_EN_MASK ?
iommu_feature_enable(iommu, CONTROL_PASSPW_EN) :
iommu_feature_disable(iommu, CONTROL_PASSPW_EN);
iommu->acpi_flags & IVHD_FLAG_RESPASSPW_EN_MASK ?
iommu_feature_enable(iommu, CONTROL_RESPASSPW_EN) :
iommu_feature_disable(iommu, CONTROL_RESPASSPW_EN);
iommu->acpi_flags & IVHD_FLAG_ISOC_EN_MASK ?
iommu_feature_enable(iommu, CONTROL_ISOC_EN) :
iommu_feature_disable(iommu, CONTROL_ISOC_EN);
/*
* make IOMMU memory accesses cache coherent
*/
iommu_feature_enable(iommu, CONTROL_COHERENT_EN);
}
static void iommu_apply_quirks(struct amd_iommu *iommu)
{
if (is_rd890_iommu(iommu->dev)) {
pci_write_config_dword(iommu->dev, 0xf0, iommu->cache_cfg[0]);
pci_write_config_dword(iommu->dev, 0xf4, iommu->cache_cfg[1]);
pci_write_config_dword(iommu->dev, 0xf8, iommu->cache_cfg[2]);
pci_write_config_dword(iommu->dev, 0xfc, iommu->cache_cfg[3]);
}
}
/*
* This function finally enables all IOMMUs found in the system after
* they have been initialized
@ -1126,6 +1147,8 @@ static void enable_iommus(void)
for_each_iommu(iommu) {
iommu_disable(iommu);
iommu_apply_quirks(iommu);
iommu_init_flags(iommu);
iommu_set_device_table(iommu);
iommu_enable_command_buffer(iommu);
iommu_enable_event_buffer(iommu);

3
include/linux/pci_ids.h
View File

@ -393,6 +393,9 @@
#define PCI_DEVICE_ID_VLSI_82C147 0x0105
#define PCI_DEVICE_ID_VLSI_VAS96011 0x0702
/* AMD RD890 Chipset */
#define PCI_DEVICE_ID_RD890_IOMMU 0x5a23
#define PCI_VENDOR_ID_ADL 0x1005
#define PCI_DEVICE_ID_ADL_2301 0x2301