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hw/arm/smmuv3: Support 16K translation granule

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The driver can query some bits in SMMUv3 IDR5 to learn which
translation granules are supported. Arm recommends that SMMUv3
implementations support at least 4K and 64K granules. But in
the vSMMUv3, there seems to be no reason not to support 16K
translation granule. In addition, if 16K is not supported,
vSVA will failed to be enabled in the future for 16K guest
kernel. So it'd better to support it.

Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Chen Qun 2021-03-31 14:47:13 +08:00
parent c127034a6d
commit 3c9cc492f2
1 changed files with 49 additions and 0 deletions
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49
hw-arm-smmuv3-Support-16K-translation-granule.patch Normal file
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@ -0,0 +1,49 @@
From 008dec30dea19950ff48a34c54441d065c1f228b Mon Sep 17 00:00:00 2001
From: Kunkun Jiang <jiangkunkun@huawei.com>
Date: Wed, 31 Mar 2021 14:47:13 +0800
Subject: [PATCH] hw/arm/smmuv3: Support 16K translation granule
The driver can query some bits in SMMUv3 IDR5 to learn which
translation granules are supported. Arm recommends that SMMUv3
implementations support at least 4K and 64K granules. But in
the vSMMUv3, there seems to be no reason not to support 16K
translation granule. In addition, if 16K is not supported,
vSVA will failed to be enabled in the future for 16K guest
kernel. So it'd better to support it.
Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
hw/arm/smmuv3.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
index e96d5beb9a..7911944c59 100644
--- a/hw/arm/smmuv3.c
+++ b/hw/arm/smmuv3.c
@@ -254,8 +254,9 @@ static void smmuv3_init_regs(SMMUv3State *s)
s->idr[1] = FIELD_DP32(s->idr[1], IDR1, EVENTQS, SMMU_EVENTQS);
s->idr[1] = FIELD_DP32(s->idr[1], IDR1, CMDQS, SMMU_CMDQS);
- /* 4K and 64K granule support */
+ /* 4K, 16K and 64K granule support */
s->idr[5] = FIELD_DP32(s->idr[5], IDR5, GRAN4K, 1);
+ s->idr[5] = FIELD_DP32(s->idr[5], IDR5, GRAN16K, 1);
s->idr[5] = FIELD_DP32(s->idr[5], IDR5, GRAN64K, 1);
s->idr[5] = FIELD_DP32(s->idr[5], IDR5, OAS, SMMU_IDR5_OAS); /* 44 bits */
@@ -480,7 +481,8 @@ static int decode_cd(SMMUTransCfg *cfg, CD *cd, SMMUEventInfo *event)
tg = CD_TG(cd, i);
tt->granule_sz = tg2granule(tg, i);
- if ((tt->granule_sz != 12 && tt->granule_sz != 16) || CD_ENDI(cd)) {
+ if ((tt->granule_sz != 12 && tt->granule_sz != 14 &&
+ tt->granule_sz != 16) || CD_ENDI(cd)) {
goto bad_cd;
}
--
2.27.0