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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen staging] AMD/IOMMU: use bit field for extended feature register
commit c69363b2ac7e5ed88908a304e6903f5842c9805e
Author: Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Wed Jul 31 13:14:27 2019 +0200
Commit: Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Jul 31 13:14:27 2019 +0200
AMD/IOMMU: use bit field for extended feature register
This also takes care of several of the shift values wrongly having been
specified as hex rather than dec.
Take the opportunity and
- replace a readl() pair by a single readq(),
- add further fields.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Acked-by: Brian Woods <brian.woods@xxxxxxx>
---
xen/drivers/passthrough/amd/iommu_detect.c | 79 ++++++++++++++++++---------
xen/drivers/passthrough/amd/iommu_guest.c | 55 +++++++------------
xen/drivers/passthrough/amd/iommu_init.c | 21 ++++---
xen/include/asm-x86/amd-iommu.h | 4 +-
xen/include/asm-x86/hvm/svm/amd-iommu-defs.h | 69 ++++++++++++++++-------
xen/include/asm-x86/hvm/svm/amd-iommu-proto.h | 7 ---
6 files changed, 136 insertions(+), 99 deletions(-)
diff --git a/xen/drivers/passthrough/amd/iommu_detect.c
b/xen/drivers/passthrough/amd/iommu_detect.c
index ec8811adac..d782e66eee 100644
--- a/xen/drivers/passthrough/amd/iommu_detect.c
+++ b/xen/drivers/passthrough/amd/iommu_detect.c
@@ -60,49 +60,76 @@ static int __init get_iommu_capabilities(
void __init get_iommu_features(struct amd_iommu *iommu)
{
- u32 low, high;
- int i = 0 ;
const struct amd_iommu *first;
- static const char *__initdata feature_str[] = {
- "- Prefetch Pages Command",
- "- Peripheral Page Service Request",
- "- X2APIC Supported",
- "- NX bit Supported",
- "- Guest Translation",
- "- Reserved bit [5]",
- "- Invalidate All Command",
- "- Guest APIC supported",
- "- Hardware Error Registers",
- "- Performance Counters",
- NULL
- };
-
ASSERT( iommu->mmio_base );
if ( !iommu_has_cap(iommu, PCI_CAP_EFRSUP_SHIFT) )
{
- iommu->features = 0;
+ iommu->features.raw = 0;
return;
}
- low = readl(iommu->mmio_base + IOMMU_EXT_FEATURE_MMIO_OFFSET);
- high = readl(iommu->mmio_base + IOMMU_EXT_FEATURE_MMIO_OFFSET + 4);
-
- iommu->features = ((u64)high << 32) | low;
+ iommu->features.raw =
+ readq(iommu->mmio_base + IOMMU_EXT_FEATURE_MMIO_OFFSET);
/* Don't log the same set of features over and over. */
first = list_first_entry(&amd_iommu_head, struct amd_iommu, list);
- if ( iommu != first && iommu->features == first->features )
+ if ( iommu != first && iommu->features.raw == first->features.raw )
return;
printk("AMD-Vi: IOMMU Extended Features:\n");
- while ( feature_str[i] )
+#define FEAT(fld, str) do { \
+ if ( --((union amd_iommu_ext_features){}).flds.fld > 1 ) \
+ printk( "- " str ": %#x\n", iommu->features.flds.fld); \
+ else if ( iommu->features.flds.fld ) \
+ printk( "- " str "\n"); \
+} while ( false )
+
+ FEAT(pref_sup, "Prefetch Pages Command");
+ FEAT(ppr_sup, "Peripheral Page Service Request");
+ FEAT(xt_sup, "x2APIC");
+ FEAT(nx_sup, "NX bit");
+ FEAT(gappi_sup, "Guest APIC Physical Processor Interrupt");
+ FEAT(ia_sup, "Invalidate All Command");
+ FEAT(ga_sup, "Guest APIC");
+ FEAT(he_sup, "Hardware Error Registers");
+ FEAT(pc_sup, "Performance Counters");
+ FEAT(hats, "Host Address Translation Size");
+
+ if ( iommu->features.flds.gt_sup )
{
- if ( amd_iommu_has_feature(iommu, i) )
- printk( " %s\n", feature_str[i]);
- i++;
+ FEAT(gats, "Guest Address Translation Size");
+ FEAT(glx_sup, "Guest CR3 Root Table Level");
+ FEAT(pas_max, "Maximum PASID");
}
+
+ FEAT(smif_sup, "SMI Filter Register");
+ FEAT(smif_rc, "SMI Filter Register Count");
+ FEAT(gam_sup, "Guest Virtual APIC Modes");
+ FEAT(dual_ppr_log_sup, "Dual PPR Log");
+ FEAT(dual_event_log_sup, "Dual Event Log");
+ FEAT(sats_sup, "Secure ATS");
+ FEAT(us_sup, "User / Supervisor Page Protection");
+ FEAT(dev_tbl_seg_sup, "Device Table Segmentation");
+ FEAT(ppr_early_of_sup, "PPR Log Overflow Early Warning");
+ FEAT(ppr_auto_rsp_sup, "PPR Automatic Response");
+ FEAT(marc_sup, "Memory Access Routing and Control");
+ FEAT(blk_stop_mrk_sup, "Block StopMark Message");
+ FEAT(perf_opt_sup , "Performance Optimization");
+ FEAT(msi_cap_mmio_sup, "MSI Capability MMIO Access");
+ FEAT(gio_sup, "Guest I/O Protection");
+ FEAT(ha_sup, "Host Access");
+ FEAT(eph_sup, "Enhanced PPR Handling");
+ FEAT(attr_fw_sup, "Attribute Forward");
+ FEAT(hd_sup, "Host Dirty");
+ FEAT(inv_iotlb_type_sup, "Invalidate IOTLB Type");
+ FEAT(viommu_sup, "Virtualized IOMMU");
+ FEAT(vm_guard_io_sup, "VMGuard I/O Support");
+ FEAT(vm_table_size, "VM Table Size");
+ FEAT(ga_update_dis_sup, "Guest Access Bit Update Disable");
+
+#undef FEAT
}
int __init amd_iommu_detect_one_acpi(
diff --git a/xen/drivers/passthrough/amd/iommu_guest.c
b/xen/drivers/passthrough/amd/iommu_guest.c
index 328e7509d5..af59bf1ec8 100644
--- a/xen/drivers/passthrough/amd/iommu_guest.c
+++ b/xen/drivers/passthrough/amd/iommu_guest.c
@@ -638,7 +638,7 @@ static uint64_t iommu_mmio_read64(struct guest_iommu *iommu,
val = reg_to_u64(iommu->reg_status);
break;
case IOMMU_EXT_FEATURE_MMIO_OFFSET:
- val = reg_to_u64(iommu->reg_ext_feature);
+ val = iommu->reg_ext_feature.raw;
break;
default:
@@ -802,39 +802,26 @@ int guest_iommu_set_base(struct domain *d, uint64_t base)
/* Initialize mmio read only bits */
static void guest_iommu_reg_init(struct guest_iommu *iommu)
{
- uint32_t lower, upper;
-
- lower = upper = 0;
- /* Support prefetch */
- iommu_set_bit(&lower,IOMMU_EXT_FEATURE_PREFSUP_SHIFT);
- /* Support PPR log */
- iommu_set_bit(&lower,IOMMU_EXT_FEATURE_PPRSUP_SHIFT);
- /* Support guest translation */
- iommu_set_bit(&lower,IOMMU_EXT_FEATURE_GTSUP_SHIFT);
- /* Support invalidate all command */
- iommu_set_bit(&lower,IOMMU_EXT_FEATURE_IASUP_SHIFT);
-
- /* Host translation size has 6 levels */
- set_field_in_reg_u32(HOST_ADDRESS_SIZE_6_LEVEL, lower,
- IOMMU_EXT_FEATURE_HATS_MASK,
- IOMMU_EXT_FEATURE_HATS_SHIFT,
- &lower);
- /* Guest translation size has 6 levels */
- set_field_in_reg_u32(GUEST_ADDRESS_SIZE_6_LEVEL, lower,
- IOMMU_EXT_FEATURE_GATS_MASK,
- IOMMU_EXT_FEATURE_GATS_SHIFT,
- &lower);
- /* Single level gCR3 */
- set_field_in_reg_u32(GUEST_CR3_1_LEVEL, lower,
- IOMMU_EXT_FEATURE_GLXSUP_MASK,
- IOMMU_EXT_FEATURE_GLXSUP_SHIFT, &lower);
- /* 9 bit PASID */
- set_field_in_reg_u32(PASMAX_9_bit, upper,
- IOMMU_EXT_FEATURE_PASMAX_MASK,
- IOMMU_EXT_FEATURE_PASMAX_SHIFT, &upper);
-
- iommu->reg_ext_feature.lo = lower;
- iommu->reg_ext_feature.hi = upper;
+ union amd_iommu_ext_features ef = {
+ /* Support prefetch */
+ .flds.pref_sup = 1,
+ /* Support PPR log */
+ .flds.ppr_sup = 1,
+ /* Support guest translation */
+ .flds.gt_sup = 1,
+ /* Support invalidate all command */
+ .flds.ia_sup = 1,
+ /* Host translation size has 6 levels */
+ .flds.hats = HOST_ADDRESS_SIZE_6_LEVEL,
+ /* Guest translation size has 6 levels */
+ .flds.gats = GUEST_ADDRESS_SIZE_6_LEVEL,
+ /* Single level gCR3 */
+ .flds.glx_sup = GUEST_CR3_1_LEVEL,
+ /* 9 bit PASID */
+ .flds.pas_max = PASMAX_9_bit,
+ };
+
+ iommu->reg_ext_feature = ef;
}
static int guest_iommu_mmio_range(struct vcpu *v, unsigned long addr)
diff --git a/xen/drivers/passthrough/amd/iommu_init.c
b/xen/drivers/passthrough/amd/iommu_init.c
index 94790feb31..6bc713991d 100644
--- a/xen/drivers/passthrough/amd/iommu_init.c
+++ b/xen/drivers/passthrough/amd/iommu_init.c
@@ -882,7 +882,7 @@ static void enable_iommu(struct amd_iommu *iommu)
register_iommu_event_log_in_mmio_space(iommu);
register_iommu_exclusion_range(iommu);
- if ( amd_iommu_has_feature(iommu, IOMMU_EXT_FEATURE_PPRSUP_SHIFT) )
+ if ( iommu->features.flds.ppr_sup )
register_iommu_ppr_log_in_mmio_space(iommu);
desc = irq_to_desc(iommu->msi.irq);
@@ -896,15 +896,15 @@ static void enable_iommu(struct amd_iommu *iommu)
set_iommu_command_buffer_control(iommu, IOMMU_CONTROL_ENABLED);
set_iommu_event_log_control(iommu, IOMMU_CONTROL_ENABLED);
- if ( amd_iommu_has_feature(iommu, IOMMU_EXT_FEATURE_PPRSUP_SHIFT) )
+ if ( iommu->features.flds.ppr_sup )
set_iommu_ppr_log_control(iommu, IOMMU_CONTROL_ENABLED);
- if ( amd_iommu_has_feature(iommu, IOMMU_EXT_FEATURE_GTSUP_SHIFT) )
+ if ( iommu->features.flds.gt_sup )
set_iommu_guest_translation_control(iommu, IOMMU_CONTROL_ENABLED);
set_iommu_translation_control(iommu, IOMMU_CONTROL_ENABLED);
- if ( amd_iommu_has_feature(iommu, IOMMU_EXT_FEATURE_IASUP_SHIFT) )
+ if ( iommu->features.flds.ia_sup )
amd_iommu_flush_all_caches(iommu);
iommu->enabled = 1;
@@ -927,10 +927,10 @@ static void disable_iommu(struct amd_iommu *iommu)
set_iommu_command_buffer_control(iommu, IOMMU_CONTROL_DISABLED);
set_iommu_event_log_control(iommu, IOMMU_CONTROL_DISABLED);
- if ( amd_iommu_has_feature(iommu, IOMMU_EXT_FEATURE_PPRSUP_SHIFT) )
+ if ( iommu->features.flds.ppr_sup )
set_iommu_ppr_log_control(iommu, IOMMU_CONTROL_DISABLED);
- if ( amd_iommu_has_feature(iommu, IOMMU_EXT_FEATURE_GTSUP_SHIFT) )
+ if ( iommu->features.flds.gt_sup )
set_iommu_guest_translation_control(iommu, IOMMU_CONTROL_DISABLED);
set_iommu_translation_control(iommu, IOMMU_CONTROL_DISABLED);
@@ -1026,7 +1026,7 @@ static int __init amd_iommu_init_one(struct amd_iommu
*iommu)
get_iommu_features(iommu);
- if ( iommu->features )
+ if ( iommu->features.raw )
iommuv2_enabled = 1;
if ( allocate_cmd_buffer(iommu) == NULL )
@@ -1035,9 +1035,8 @@ static int __init amd_iommu_init_one(struct amd_iommu
*iommu)
if ( allocate_event_log(iommu) == NULL )
goto error_out;
- if ( amd_iommu_has_feature(iommu, IOMMU_EXT_FEATURE_PPRSUP_SHIFT) )
- if ( allocate_ppr_log(iommu) == NULL )
- goto error_out;
+ if ( iommu->features.flds.ppr_sup && !allocate_ppr_log(iommu) )
+ goto error_out;
if ( !set_iommu_interrupt_handler(iommu) )
goto error_out;
@@ -1393,7 +1392,7 @@ void amd_iommu_resume(void)
}
/* flush all cache entries after iommu re-enabled */
- if ( !amd_iommu_has_feature(iommu, IOMMU_EXT_FEATURE_IASUP_SHIFT) )
+ if ( !iommu->features.flds.ia_sup )
{
invalidate_all_devices();
invalidate_all_domain_pages();
diff --git a/xen/include/asm-x86/amd-iommu.h b/xen/include/asm-x86/amd-iommu.h
index b792f7f432..409eee21bb 100644
--- a/xen/include/asm-x86/amd-iommu.h
+++ b/xen/include/asm-x86/amd-iommu.h
@@ -83,7 +83,7 @@ struct amd_iommu {
iommu_cap_t cap;
u8 ht_flags;
- u64 features;
+ union amd_iommu_ext_features features;
void *mmio_base;
unsigned long mmio_base_phys;
@@ -175,7 +175,7 @@ struct guest_iommu {
/* MMIO regs */
struct mmio_reg reg_ctrl; /* MMIO offset 0018h */
struct mmio_reg reg_status; /* MMIO offset 2020h */
- struct mmio_reg reg_ext_feature; /* MMIO offset 0030h */
+ union amd_iommu_ext_features reg_ext_feature; /* MMIO offset 0030h */
/* guest interrupt settings */
struct guest_iommu_msi msi;
diff --git a/xen/include/asm-x86/hvm/svm/amd-iommu-defs.h
b/xen/include/asm-x86/hvm/svm/amd-iommu-defs.h
index 40da33b271..3046bbc801 100644
--- a/xen/include/asm-x86/hvm/svm/amd-iommu-defs.h
+++ b/xen/include/asm-x86/hvm/svm/amd-iommu-defs.h
@@ -346,26 +346,57 @@ struct amd_iommu_dte {
#define IOMMU_EXCLUSION_LIMIT_HIGH_MASK 0xFFFFFFFF
#define IOMMU_EXCLUSION_LIMIT_HIGH_SHIFT 0
-/* Extended Feature Register*/
+/* Extended Feature Register */
#define IOMMU_EXT_FEATURE_MMIO_OFFSET 0x30
-#define IOMMU_EXT_FEATURE_PREFSUP_SHIFT 0x0
-#define IOMMU_EXT_FEATURE_PPRSUP_SHIFT 0x1
-#define IOMMU_EXT_FEATURE_XTSUP_SHIFT 0x2
-#define IOMMU_EXT_FEATURE_NXSUP_SHIFT 0x3
-#define IOMMU_EXT_FEATURE_GTSUP_SHIFT 0x4
-#define IOMMU_EXT_FEATURE_IASUP_SHIFT 0x6
-#define IOMMU_EXT_FEATURE_GASUP_SHIFT 0x7
-#define IOMMU_EXT_FEATURE_HESUP_SHIFT 0x8
-#define IOMMU_EXT_FEATURE_PCSUP_SHIFT 0x9
-#define IOMMU_EXT_FEATURE_HATS_SHIFT 0x10
-#define IOMMU_EXT_FEATURE_HATS_MASK 0x00000C00
-#define IOMMU_EXT_FEATURE_GATS_SHIFT 0x12
-#define IOMMU_EXT_FEATURE_GATS_MASK 0x00003000
-#define IOMMU_EXT_FEATURE_GLXSUP_SHIFT 0x14
-#define IOMMU_EXT_FEATURE_GLXSUP_MASK 0x0000C000
-
-#define IOMMU_EXT_FEATURE_PASMAX_SHIFT 0x0
-#define IOMMU_EXT_FEATURE_PASMAX_MASK 0x0000001F
+
+union amd_iommu_ext_features {
+ uint64_t raw;
+ struct {
+ unsigned int pref_sup:1;
+ unsigned int ppr_sup:1;
+ unsigned int xt_sup:1;
+ unsigned int nx_sup:1;
+ unsigned int gt_sup:1;
+ unsigned int gappi_sup:1;
+ unsigned int ia_sup:1;
+ unsigned int ga_sup:1;
+ unsigned int he_sup:1;
+ unsigned int pc_sup:1;
+ unsigned int hats:2;
+ unsigned int gats:2;
+ unsigned int glx_sup:2;
+ unsigned int smif_sup:2;
+ unsigned int smif_rc:3;
+ unsigned int gam_sup:3;
+ unsigned int dual_ppr_log_sup:2;
+ unsigned int :2;
+ unsigned int dual_event_log_sup:2;
+ unsigned int :1;
+ unsigned int sats_sup:1;
+ unsigned int pas_max:5;
+ unsigned int us_sup:1;
+ unsigned int dev_tbl_seg_sup:2;
+ unsigned int ppr_early_of_sup:1;
+ unsigned int ppr_auto_rsp_sup:1;
+ unsigned int marc_sup:2;
+ unsigned int blk_stop_mrk_sup:1;
+ unsigned int perf_opt_sup:1;
+ unsigned int msi_cap_mmio_sup:1;
+ unsigned int :1;
+ unsigned int gio_sup:1;
+ unsigned int ha_sup:1;
+ unsigned int eph_sup:1;
+ unsigned int attr_fw_sup:1;
+ unsigned int hd_sup:1;
+ unsigned int :1;
+ unsigned int inv_iotlb_type_sup:1;
+ unsigned int viommu_sup:1;
+ unsigned int vm_guard_io_sup:1;
+ unsigned int vm_table_size:4;
+ unsigned int ga_update_dis_sup:1;
+ unsigned int :2;
+ } flds;
+};
/* Status Register*/
#define IOMMU_STATUS_MMIO_OFFSET 0x2020
diff --git a/xen/include/asm-x86/hvm/svm/amd-iommu-proto.h
b/xen/include/asm-x86/hvm/svm/amd-iommu-proto.h
index 8d6b03a041..65e073571f 100644
--- a/xen/include/asm-x86/hvm/svm/amd-iommu-proto.h
+++ b/xen/include/asm-x86/hvm/svm/amd-iommu-proto.h
@@ -218,13 +218,6 @@ static inline int iommu_has_cap(struct amd_iommu *iommu,
uint32_t bit)
return !!(iommu->cap.header & (1u << bit));
}
-static inline int amd_iommu_has_feature(struct amd_iommu *iommu, uint32_t bit)
-{
- if ( !iommu_has_cap(iommu, PCI_CAP_EFRSUP_SHIFT) )
- return 0;
- return !!(iommu->features & (1U << bit));
-}
-
/* access tail or head pointer of ring buffer */
static inline uint32_t iommu_get_rb_pointer(uint32_t reg)
{
--
generated by git-patchbot for /home/xen/git/xen.git#staging
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