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iommu/io-pgtable-arm: Rationalise TCR handling

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Although it's conceptually nice for the io_pgtable_cfg to provide a
standard VMSA TCR value, the reality is that no VMSA-compliant IOMMU
looks exactly like an Arm CPU, and they all have various other TCR
controls which io-pgtable can't be expected to understand. Thus since
there is an expectation that drivers will have to add to the given TCR
value anyway, let's strip it down to just the essentials that are
directly relevant to io-pgtable's inner workings - namely the various
sizes and the walk attributes.

Tested-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
[will: Add missing include of bitfield.h]
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Robin Murphy 2019-10-25 19:08:38 +01:00 committed by Will Deacon
parent 6f932ad369
commit fb485eb18e
8 changed files with 95 additions and 104 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
drivers/iommu/arm-smmu-v3.c
View File

@ -260,27 +260,18 @@
/* Context descriptor (stage-1 only) */
#define CTXDESC_CD_DWORDS 8
#define CTXDESC_CD_0_TCR_T0SZ GENMASK_ULL(5, 0)
#define ARM64_TCR_T0SZ GENMASK_ULL(5, 0)
#define CTXDESC_CD_0_TCR_TG0 GENMASK_ULL(7, 6)
#define ARM64_TCR_TG0 GENMASK_ULL(15, 14)
#define CTXDESC_CD_0_TCR_IRGN0 GENMASK_ULL(9, 8)
#define ARM64_TCR_IRGN0 GENMASK_ULL(9, 8)
#define CTXDESC_CD_0_TCR_ORGN0 GENMASK_ULL(11, 10)
#define ARM64_TCR_ORGN0 GENMASK_ULL(11, 10)
#define CTXDESC_CD_0_TCR_SH0 GENMASK_ULL(13, 12)
#define ARM64_TCR_SH0 GENMASK_ULL(13, 12)
#define CTXDESC_CD_0_TCR_EPD0 (1ULL << 14)
#define ARM64_TCR_EPD0 (1ULL << 7)
#define CTXDESC_CD_0_TCR_EPD1 (1ULL << 30)
#define ARM64_TCR_EPD1 (1ULL << 23)
#define CTXDESC_CD_0_ENDI (1UL << 15)
#define CTXDESC_CD_0_V (1UL << 31)
#define CTXDESC_CD_0_TCR_IPS GENMASK_ULL(34, 32)
#define ARM64_TCR_IPS GENMASK_ULL(34, 32)
#define CTXDESC_CD_0_TCR_TBI0 (1ULL << 38)
#define ARM64_TCR_TBI0 (1ULL << 37)
#define CTXDESC_CD_0_AA64 (1UL << 41)
#define CTXDESC_CD_0_S (1UL << 44)
@ -291,10 +282,6 @@
#define CTXDESC_CD_1_TTB0_MASK GENMASK_ULL(51, 4)
/* Convert between AArch64 (CPU) TCR format and SMMU CD format */
#define ARM_SMMU_TCR2CD(tcr, fld) FIELD_PREP(CTXDESC_CD_0_TCR_##fld, \
FIELD_GET(ARM64_TCR_##fld, tcr))
/* Command queue */
#define CMDQ_ENT_SZ_SHIFT 4
#define CMDQ_ENT_DWORDS ((1 << CMDQ_ENT_SZ_SHIFT) >> 3)
@ -1439,23 +1426,6 @@ static int arm_smmu_cmdq_issue_sync(struct arm_smmu_device *smmu)
}
/* Context descriptor manipulation functions */
static u64 arm_smmu_cpu_tcr_to_cd(u64 tcr)
{
u64 val = 0;
/* Repack the TCR. Just care about TTBR0 for now */
val |= ARM_SMMU_TCR2CD(tcr, T0SZ);
val |= ARM_SMMU_TCR2CD(tcr, TG0);
val |= ARM_SMMU_TCR2CD(tcr, IRGN0);
val |= ARM_SMMU_TCR2CD(tcr, ORGN0);
val |= ARM_SMMU_TCR2CD(tcr, SH0);
val |= ARM_SMMU_TCR2CD(tcr, EPD0);
val |= ARM_SMMU_TCR2CD(tcr, EPD1);
val |= ARM_SMMU_TCR2CD(tcr, IPS);
return val;
}
static void arm_smmu_write_ctx_desc(struct arm_smmu_device *smmu,
struct arm_smmu_s1_cfg *cfg)
{
@ -1465,7 +1435,7 @@ static void arm_smmu_write_ctx_desc(struct arm_smmu_device *smmu,
* We don't need to issue any invalidation here, as we'll invalidate
* the STE when installing the new entry anyway.
*/
val = arm_smmu_cpu_tcr_to_cd(cfg->cd.tcr) |
val = cfg->cd.tcr |
#ifdef __BIG_ENDIAN
CTXDESC_CD_0_ENDI |
#endif
@ -2151,6 +2121,7 @@ static int arm_smmu_domain_finalise_s1(struct arm_smmu_domain *smmu_domain,
int asid;
struct arm_smmu_device *smmu = smmu_domain->smmu;
struct arm_smmu_s1_cfg *cfg = &smmu_domain->s1_cfg;
typeof(&pgtbl_cfg->arm_lpae_s1_cfg.tcr) tcr = &pgtbl_cfg->arm_lpae_s1_cfg.tcr;
asid = arm_smmu_bitmap_alloc(smmu->asid_map, smmu->asid_bits);
if (asid < 0)
@ -2167,7 +2138,13 @@ static int arm_smmu_domain_finalise_s1(struct arm_smmu_domain *smmu_domain,
cfg->cd.asid = (u16)asid;
cfg->cd.ttbr = pgtbl_cfg->arm_lpae_s1_cfg.ttbr;
cfg->cd.tcr = pgtbl_cfg->arm_lpae_s1_cfg.tcr;
cfg->cd.tcr = FIELD_PREP(CTXDESC_CD_0_TCR_T0SZ, tcr->tsz) |
FIELD_PREP(CTXDESC_CD_0_TCR_TG0, tcr->tg) |
FIELD_PREP(CTXDESC_CD_0_TCR_IRGN0, tcr->irgn) |
FIELD_PREP(CTXDESC_CD_0_TCR_ORGN0, tcr->orgn) |
FIELD_PREP(CTXDESC_CD_0_TCR_SH0, tcr->sh) |
FIELD_PREP(CTXDESC_CD_0_TCR_IPS, tcr->ips) |
CTXDESC_CD_0_TCR_EPD1 | CTXDESC_CD_0_AA64;
cfg->cd.mair = pgtbl_cfg->arm_lpae_s1_cfg.mair;
return 0;

7
drivers/iommu/arm-smmu.c
View File

@ -540,11 +540,12 @@ static void arm_smmu_init_context_bank(struct arm_smmu_domain *smmu_domain,
if (cfg->fmt == ARM_SMMU_CTX_FMT_AARCH32_S) {
cb->tcr[0] = pgtbl_cfg->arm_v7s_cfg.tcr;
} else {
cb->tcr[0] = pgtbl_cfg->arm_lpae_s1_cfg.tcr;
cb->tcr[1] = pgtbl_cfg->arm_lpae_s1_cfg.tcr >> 32;
cb->tcr[1] |= FIELD_PREP(TCR2_SEP, TCR2_SEP_UPSTREAM);
cb->tcr[0] = arm_smmu_lpae_tcr(pgtbl_cfg);
cb->tcr[1] = arm_smmu_lpae_tcr2(pgtbl_cfg);
if (cfg->fmt == ARM_SMMU_CTX_FMT_AARCH64)
cb->tcr[1] |= TCR2_AS;
else
cb->tcr[0] |= TCR_EAE;
}
} else {
cb->tcr[0] = pgtbl_cfg->arm_lpae_s2_cfg.vtcr;

28
drivers/iommu/arm-smmu.h
View File

@ -11,6 +11,7 @@
#define _ARM_SMMU_H
#include <linux/atomic.h>
#include <linux/bitfield.h>
#include <linux/bits.h>
#include <linux/clk.h>
#include <linux/device.h>
@ -158,12 +159,24 @@ enum arm_smmu_cbar_type {
#define TCR2_SEP GENMASK(17, 15)
#define TCR2_SEP_UPSTREAM 0x7
#define TCR2_AS BIT(4)
#define TCR2_PASIZE GENMASK(3, 0)
#define ARM_SMMU_CB_TTBR0 0x20
#define ARM_SMMU_CB_TTBR1 0x28
#define TTBRn_ASID GENMASK_ULL(63, 48)
/* arm64 headers leak this somehow :( */
#undef TCR_T0SZ
#define ARM_SMMU_CB_TCR 0x30
#define TCR_EAE BIT(31)
#define TCR_EPD1 BIT(23)
#define TCR_TG0 GENMASK(15, 14)
#define TCR_SH0 GENMASK(13, 12)
#define TCR_ORGN0 GENMASK(11, 10)
#define TCR_IRGN0 GENMASK(9, 8)
#define TCR_T0SZ GENMASK(5, 0)
#define ARM_SMMU_CB_CONTEXTIDR 0x34
#define ARM_SMMU_CB_S1_MAIR0 0x38
#define ARM_SMMU_CB_S1_MAIR1 0x3c
@ -318,6 +331,21 @@ struct arm_smmu_domain {
struct iommu_domain domain;
};
static inline u32 arm_smmu_lpae_tcr(struct io_pgtable_cfg *cfg)
{
return TCR_EPD1 |
FIELD_PREP(TCR_TG0, cfg->arm_lpae_s1_cfg.tcr.tg) |
FIELD_PREP(TCR_SH0, cfg->arm_lpae_s1_cfg.tcr.sh) |
FIELD_PREP(TCR_ORGN0, cfg->arm_lpae_s1_cfg.tcr.orgn) |
FIELD_PREP(TCR_IRGN0, cfg->arm_lpae_s1_cfg.tcr.irgn) |
FIELD_PREP(TCR_T0SZ, cfg->arm_lpae_s1_cfg.tcr.tsz);
}
static inline u32 arm_smmu_lpae_tcr2(struct io_pgtable_cfg *cfg)
{
return FIELD_PREP(TCR2_PASIZE, cfg->arm_lpae_s1_cfg.tcr.ips) |
FIELD_PREP(TCR2_SEP, TCR2_SEP_UPSTREAM);
}
/* Implementation details, yay! */
struct arm_smmu_impl {

6
drivers/iommu/io-pgtable-arm-v7s.c
View File

@ -149,8 +149,6 @@
#define ARM_V7S_TTBR_IRGN_ATTR(attr) \
((((attr) & 0x1) << 6) | (((attr) & 0x2) >> 1))
#define ARM_V7S_TCR_PD1 BIT(5)
#ifdef CONFIG_ZONE_DMA32
#define ARM_V7S_TABLE_GFP_DMA GFP_DMA32
#define ARM_V7S_TABLE_SLAB_FLAGS SLAB_CACHE_DMA32
@ -798,8 +796,8 @@ static struct io_pgtable *arm_v7s_alloc_pgtable(struct io_pgtable_cfg *cfg,
*/
cfg->pgsize_bitmap &= SZ_4K | SZ_64K | SZ_1M | SZ_16M;
/* TCR: T0SZ=0, disable TTBR1 */
cfg->arm_v7s_cfg.tcr = ARM_V7S_TCR_PD1;
/* TCR: T0SZ=0, EAE=0 (if applicable) */
cfg->arm_v7s_cfg.tcr = 0;
/*
* TEX remap: the indices used map to the closest equivalent types

98
drivers/iommu/io-pgtable-arm.c
View File

@ -100,40 +100,32 @@
#define ARM_LPAE_PTE_MEMATTR_DEV (((arm_lpae_iopte)0x1) << 2)
/* Register bits */
#define ARM_32_LPAE_TCR_EAE (1 << 31)
#define ARM_64_LPAE_S2_TCR_RES1 (1U << 31)
#define ARM_64_LPAE_VTCR_RES1 (1U << 31)
#define ARM_LPAE_TCR_EPD1 (1 << 23)
#define ARM_LPAE_TCR_TG0_4K (0 << 14)
#define ARM_LPAE_TCR_TG0_64K (1 << 14)
#define ARM_LPAE_TCR_TG0_16K (2 << 14)
#define ARM_LPAE_VTCR_TG0_SHIFT 14
#define ARM_LPAE_TCR_TG0_4K 0
#define ARM_LPAE_TCR_TG0_64K 1
#define ARM_LPAE_TCR_TG0_16K 2
#define ARM_LPAE_TCR_SH0_SHIFT 12
#define ARM_LPAE_TCR_SH0_MASK 0x3
#define ARM_LPAE_TCR_SH_NS 0
#define ARM_LPAE_TCR_SH_OS 2
#define ARM_LPAE_TCR_SH_IS 3
#define ARM_LPAE_TCR_ORGN0_SHIFT 10
#define ARM_LPAE_TCR_IRGN0_SHIFT 8
#define ARM_LPAE_TCR_RGN_MASK 0x3
#define ARM_LPAE_TCR_RGN_NC 0
#define ARM_LPAE_TCR_RGN_WBWA 1
#define ARM_LPAE_TCR_RGN_WT 2
#define ARM_LPAE_TCR_RGN_WB 3
#define ARM_LPAE_TCR_SL0_SHIFT 6
#define ARM_LPAE_TCR_SL0_MASK 0x3
#define ARM_LPAE_VTCR_SL0_SHIFT 6
#define ARM_LPAE_VTCR_SL0_MASK 0x3
#define ARM_LPAE_TCR_T0SZ_SHIFT 0
#define ARM_LPAE_TCR_SZ_MASK 0xf
#define ARM_LPAE_TCR_PS_SHIFT 16
#define ARM_LPAE_TCR_PS_MASK 0x7
#define ARM_LPAE_TCR_IPS_SHIFT 32
#define ARM_LPAE_TCR_IPS_MASK 0x7
#define ARM_LPAE_VTCR_PS_SHIFT 16
#define ARM_LPAE_VTCR_PS_MASK 0x7
#define ARM_LPAE_TCR_PS_32_BIT 0x0ULL
#define ARM_LPAE_TCR_PS_36_BIT 0x1ULL
@ -792,6 +784,7 @@ arm_64_lpae_alloc_pgtable_s1(struct io_pgtable_cfg *cfg, void *cookie)
{
u64 reg;
struct arm_lpae_io_pgtable *data;
typeof(&cfg->arm_lpae_s1_cfg.tcr) tcr = &cfg->arm_lpae_s1_cfg.tcr;
if (cfg->quirks & ~(IO_PGTABLE_QUIRK_ARM_NS |
IO_PGTABLE_QUIRK_NON_STRICT))
@ -803,58 +796,54 @@ arm_64_lpae_alloc_pgtable_s1(struct io_pgtable_cfg *cfg, void *cookie)
/* TCR */
if (cfg->coherent_walk) {
reg = (ARM_LPAE_TCR_SH_IS << ARM_LPAE_TCR_SH0_SHIFT) |
(ARM_LPAE_TCR_RGN_WBWA << ARM_LPAE_TCR_IRGN0_SHIFT) |
(ARM_LPAE_TCR_RGN_WBWA << ARM_LPAE_TCR_ORGN0_SHIFT);
tcr->sh = ARM_LPAE_TCR_SH_IS;
tcr->irgn = ARM_LPAE_TCR_RGN_WBWA;
tcr->orgn = ARM_LPAE_TCR_RGN_WBWA;
} else {
reg = (ARM_LPAE_TCR_SH_OS << ARM_LPAE_TCR_SH0_SHIFT) |
(ARM_LPAE_TCR_RGN_NC << ARM_LPAE_TCR_IRGN0_SHIFT) |
(ARM_LPAE_TCR_RGN_NC << ARM_LPAE_TCR_ORGN0_SHIFT);
tcr->sh = ARM_LPAE_TCR_SH_OS;
tcr->irgn = ARM_LPAE_TCR_RGN_NC;
tcr->orgn = ARM_LPAE_TCR_RGN_NC;
}
switch (ARM_LPAE_GRANULE(data)) {
case SZ_4K:
reg |= ARM_LPAE_TCR_TG0_4K;
tcr->tg = ARM_LPAE_TCR_TG0_4K;
break;
case SZ_16K:
reg |= ARM_LPAE_TCR_TG0_16K;
tcr->tg = ARM_LPAE_TCR_TG0_16K;
break;
case SZ_64K:
reg |= ARM_LPAE_TCR_TG0_64K;
tcr->tg = ARM_LPAE_TCR_TG0_64K;
break;
}
switch (cfg->oas) {
case 32:
reg |= (ARM_LPAE_TCR_PS_32_BIT << ARM_LPAE_TCR_IPS_SHIFT);
tcr->ips = ARM_LPAE_TCR_PS_32_BIT;
break;
case 36:
reg |= (ARM_LPAE_TCR_PS_36_BIT << ARM_LPAE_TCR_IPS_SHIFT);
tcr->ips = ARM_LPAE_TCR_PS_36_BIT;
break;
case 40:
reg |= (ARM_LPAE_TCR_PS_40_BIT << ARM_LPAE_TCR_IPS_SHIFT);
tcr->ips = ARM_LPAE_TCR_PS_40_BIT;
break;
case 42:
reg |= (ARM_LPAE_TCR_PS_42_BIT << ARM_LPAE_TCR_IPS_SHIFT);
tcr->ips = ARM_LPAE_TCR_PS_42_BIT;
break;
case 44:
reg |= (ARM_LPAE_TCR_PS_44_BIT << ARM_LPAE_TCR_IPS_SHIFT);
tcr->ips = ARM_LPAE_TCR_PS_44_BIT;
break;
case 48:
reg |= (ARM_LPAE_TCR_PS_48_BIT << ARM_LPAE_TCR_IPS_SHIFT);
tcr->ips = ARM_LPAE_TCR_PS_48_BIT;
break;
case 52:
reg |= (ARM_LPAE_TCR_PS_52_BIT << ARM_LPAE_TCR_IPS_SHIFT);
tcr->ips = ARM_LPAE_TCR_PS_52_BIT;
break;
default:
goto out_free_data;
}
reg |= (64ULL - cfg->ias) << ARM_LPAE_TCR_T0SZ_SHIFT;
/* Disable speculative walks through TTBR1 */
reg |= ARM_LPAE_TCR_EPD1;
cfg->arm_lpae_s1_cfg.tcr = reg;
tcr->tsz = 64ULL - cfg->ias;
/* MAIRs */
reg = (ARM_LPAE_MAIR_ATTR_NC
@ -915,7 +904,7 @@ arm_64_lpae_alloc_pgtable_s2(struct io_pgtable_cfg *cfg, void *cookie)
}
/* VTCR */
reg = ARM_64_LPAE_S2_TCR_RES1;
reg = ARM_64_LPAE_VTCR_RES1;
if (cfg->coherent_walk) {
reg |= (ARM_LPAE_TCR_SH_IS << ARM_LPAE_TCR_SH0_SHIFT) |
(ARM_LPAE_TCR_RGN_WBWA << ARM_LPAE_TCR_IRGN0_SHIFT) |
@ -930,45 +919,45 @@ arm_64_lpae_alloc_pgtable_s2(struct io_pgtable_cfg *cfg, void *cookie)
switch (ARM_LPAE_GRANULE(data)) {
case SZ_4K:
reg |= ARM_LPAE_TCR_TG0_4K;
reg |= (ARM_LPAE_TCR_TG0_4K << ARM_LPAE_VTCR_TG0_SHIFT);
sl++; /* SL0 format is different for 4K granule size */
break;
case SZ_16K:
reg |= ARM_LPAE_TCR_TG0_16K;
reg |= (ARM_LPAE_TCR_TG0_16K << ARM_LPAE_VTCR_TG0_SHIFT);
break;
case SZ_64K:
reg |= ARM_LPAE_TCR_TG0_64K;
reg |= (ARM_LPAE_TCR_TG0_64K << ARM_LPAE_VTCR_TG0_SHIFT);
break;
}
switch (cfg->oas) {
case 32:
reg |= (ARM_LPAE_TCR_PS_32_BIT << ARM_LPAE_TCR_PS_SHIFT);
reg |= (ARM_LPAE_TCR_PS_32_BIT << ARM_LPAE_VTCR_PS_SHIFT);
break;
case 36:
reg |= (ARM_LPAE_TCR_PS_36_BIT << ARM_LPAE_TCR_PS_SHIFT);
reg |= (ARM_LPAE_TCR_PS_36_BIT << ARM_LPAE_VTCR_PS_SHIFT);
break;
case 40:
reg |= (ARM_LPAE_TCR_PS_40_BIT << ARM_LPAE_TCR_PS_SHIFT);
reg |= (ARM_LPAE_TCR_PS_40_BIT << ARM_LPAE_VTCR_PS_SHIFT);
break;
case 42:
reg |= (ARM_LPAE_TCR_PS_42_BIT << ARM_LPAE_TCR_PS_SHIFT);
reg |= (ARM_LPAE_TCR_PS_42_BIT << ARM_LPAE_VTCR_PS_SHIFT);
break;
case 44:
reg |= (ARM_LPAE_TCR_PS_44_BIT << ARM_LPAE_TCR_PS_SHIFT);
reg |= (ARM_LPAE_TCR_PS_44_BIT << ARM_LPAE_VTCR_PS_SHIFT);
break;
case 48:
reg |= (ARM_LPAE_TCR_PS_48_BIT << ARM_LPAE_TCR_PS_SHIFT);
reg |= (ARM_LPAE_TCR_PS_48_BIT << ARM_LPAE_VTCR_PS_SHIFT);
break;
case 52:
reg |= (ARM_LPAE_TCR_PS_52_BIT << ARM_LPAE_TCR_PS_SHIFT);
reg |= (ARM_LPAE_TCR_PS_52_BIT << ARM_LPAE_VTCR_PS_SHIFT);
break;
default:
goto out_free_data;
}
reg |= (64ULL - cfg->ias) << ARM_LPAE_TCR_T0SZ_SHIFT;
reg |= (~sl & ARM_LPAE_TCR_SL0_MASK) << ARM_LPAE_TCR_SL0_SHIFT;
reg |= (~sl & ARM_LPAE_VTCR_SL0_MASK) << ARM_LPAE_VTCR_SL0_SHIFT;
cfg->arm_lpae_s2_cfg.vtcr = reg;
/* Allocate pgd pages */
@ -992,19 +981,12 @@ out_free_data:
static struct io_pgtable *
arm_32_lpae_alloc_pgtable_s1(struct io_pgtable_cfg *cfg, void *cookie)
{
struct io_pgtable *iop;
if (cfg->ias > 32 || cfg->oas > 40)
return NULL;
cfg->pgsize_bitmap &= (SZ_4K | SZ_2M | SZ_1G);
iop = arm_64_lpae_alloc_pgtable_s1(cfg, cookie);
if (iop) {
cfg->arm_lpae_s1_cfg.tcr |= ARM_32_LPAE_TCR_EAE;
cfg->arm_lpae_s1_cfg.tcr &= 0xffffffff;
}
return iop;
return arm_64_lpae_alloc_pgtable_s1(cfg, cookie);
}
static struct io_pgtable *

2
drivers/iommu/io-pgtable.c
View File

@ -63,7 +63,7 @@ void free_io_pgtable_ops(struct io_pgtable_ops *ops)
if (!ops)
return;
iop = container_of(ops, struct io_pgtable, ops);
iop = io_pgtable_ops_to_pgtable(ops);
io_pgtable_tlb_flush_all(iop);
io_pgtable_init_table[iop->fmt]->free(iop);
}

8
drivers/iommu/qcom_iommu.c
View File

@ -271,15 +271,13 @@ static int qcom_iommu_init_domain(struct iommu_domain *domain,
iommu_writeq(ctx, ARM_SMMU_CB_TTBR0,
pgtbl_cfg.arm_lpae_s1_cfg.ttbr |
FIELD_PREP(TTBRn_ASID, ctx->asid));
iommu_writeq(ctx, ARM_SMMU_CB_TTBR1,
FIELD_PREP(TTBRn_ASID, ctx->asid));
iommu_writeq(ctx, ARM_SMMU_CB_TTBR1, 0);
/* TCR */
iommu_writel(ctx, ARM_SMMU_CB_TCR2,
(pgtbl_cfg.arm_lpae_s1_cfg.tcr >> 32) |
FIELD_PREP(TCR2_SEP, TCR2_SEP_UPSTREAM));
arm_smmu_lpae_tcr2(&pgtbl_cfg));
iommu_writel(ctx, ARM_SMMU_CB_TCR,
pgtbl_cfg.arm_lpae_s1_cfg.tcr);
arm_smmu_lpae_tcr(&pgtbl_cfg) | TCR_EAE);
/* MAIRs (stage-1 only) */
iommu_writel(ctx, ARM_SMMU_CB_S1_MAIR0,

9
include/linux/io-pgtable.h
View File

@ -101,7 +101,14 @@ struct io_pgtable_cfg {
union {
struct {
u64 ttbr;
u64 tcr;
struct {
u32 ips:3;
u32 tg:2;
u32 sh:2;
u32 orgn:2;
u32 irgn:2;
u32 tsz:6;
} tcr;
u64 mair;
} arm_lpae_s1_cfg;