From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>,
iommu@lists.linux-foundation.org, Joerg Roedel <jroedel@suse.de>
Subject: [PATCH AUTOSEL 4.9 11/11] iommu/amd: Fix legacy interrupt remapping for x2APIC-enabled system
Date: Thu, 7 May 2020 10:30:03 -0400 [thread overview]
Message-ID: <20200507143003.27047-11-sashal@kernel.org> (raw)
In-Reply-To: <20200507143003.27047-1-sashal@kernel.org>
From: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
[ Upstream commit b74aa02d7a30ee5e262072a7d6e8deff10b37924 ]
Currently, system fails to boot because the legacy interrupt remapping
mode does not enable 128-bit IRTE (GA), which is required for x2APIC
support.
Fix by using AMD_IOMMU_GUEST_IR_LEGACY_GA mode when booting with
kernel option amd_iommu_intr=legacy instead. The initialization
logic will check GASup and automatically fallback to using
AMD_IOMMU_GUEST_IR_LEGACY if GA mode is not supported.
Fixes: 3928aa3f5775 ("iommu/amd: Detect and enable guest vAPIC support")
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Link: https://lore.kernel.org/r/1587562202-14183-1-git-send-email-suravee.suthikulpanit@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/iommu/amd_iommu_init.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index c113e46fdc3ab..e6ae8d1239842 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -2574,7 +2574,7 @@ static int __init parse_amd_iommu_intr(char *str)
{
for (; *str; ++str) {
if (strncmp(str, "legacy", 6) == 0) {
- amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_LEGACY;
+ amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_LEGACY_GA;
break;
}
if (strncmp(str, "vapic", 5) == 0) {
--
2.20.1
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
WARNING: multiple messages have this Message-ID (diff)
From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>,
Joerg Roedel <jroedel@suse.de>, Sasha Levin <sashal@kernel.org>,
iommu@lists.linux-foundation.org
Subject: [PATCH AUTOSEL 4.9 11/11] iommu/amd: Fix legacy interrupt remapping for x2APIC-enabled system
Date: Thu, 7 May 2020 10:30:03 -0400 [thread overview]
Message-ID: <20200507143003.27047-11-sashal@kernel.org> (raw)
In-Reply-To: <20200507143003.27047-1-sashal@kernel.org>
From: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
[ Upstream commit b74aa02d7a30ee5e262072a7d6e8deff10b37924 ]
Currently, system fails to boot because the legacy interrupt remapping
mode does not enable 128-bit IRTE (GA), which is required for x2APIC
support.
Fix by using AMD_IOMMU_GUEST_IR_LEGACY_GA mode when booting with
kernel option amd_iommu_intr=legacy instead. The initialization
logic will check GASup and automatically fallback to using
AMD_IOMMU_GUEST_IR_LEGACY if GA mode is not supported.
Fixes: 3928aa3f5775 ("iommu/amd: Detect and enable guest vAPIC support")
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Link: https://lore.kernel.org/r/1587562202-14183-1-git-send-email-suravee.suthikulpanit@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/iommu/amd_iommu_init.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index c113e46fdc3ab..e6ae8d1239842 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -2574,7 +2574,7 @@ static int __init parse_amd_iommu_intr(char *str)
{
for (; *str; ++str) {
if (strncmp(str, "legacy", 6) == 0) {
- amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_LEGACY;
+ amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_LEGACY_GA;
break;
}
if (strncmp(str, "vapic", 5) == 0) {
--
2.20.1
next prev parent reply other threads:[~2020-05-07 14:30 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-07 14:29 [PATCH AUTOSEL 4.9 01/11] RDMA/mlx4: Initialize ib_spec on the stack Sasha Levin
2020-05-07 14:29 ` [PATCH AUTOSEL 4.9 02/11] nfs: Fix potential posix_acl refcnt leak in nfs3_set_acl Sasha Levin
2020-05-07 14:29 ` [PATCH AUTOSEL 4.9 03/11] dmaengine: pch_dma.c: Avoid data race between probe and irq handler Sasha Levin
2020-05-07 14:29 ` [PATCH AUTOSEL 4.9 04/11] dmaengine: mmp_tdma: Reset channel error on release Sasha Levin
2020-05-07 14:29 ` [PATCH AUTOSEL 4.9 05/11] vfio/type1: Fix VA->PA translation for PFNMAP VMAs in vaddr_get_pfn() Sasha Levin
2020-05-07 14:29 ` [PATCH AUTOSEL 4.9 06/11] ALSA: hda: Match both PCI ID and SSID for driver blacklist Sasha Levin
2020-05-07 14:29 ` [PATCH AUTOSEL 4.9 07/11] dmaengine: dmatest: Fix iteration non-stop logic Sasha Levin
2020-05-07 14:30 ` [PATCH AUTOSEL 4.9 08/11] ALSA: hda/hdmi: fix race in monitor detection during probe Sasha Levin
2020-05-07 14:30 ` Sasha Levin
2020-05-07 14:30 ` [PATCH AUTOSEL 4.9 09/11] drm/qxl: lost qxl_bo_kunmap_atomic_page in qxl_image_init_helper() Sasha Levin
2020-05-07 14:30 ` Sasha Levin
2020-05-07 14:30 ` Sasha Levin
2020-05-07 14:30 ` [PATCH AUTOSEL 4.9 10/11] ALSA: opti9xx: shut up gcc-10 range warning Sasha Levin
2020-05-07 14:30 ` Sasha Levin
2020-05-07 14:30 ` Sasha Levin [this message]
2020-05-07 14:30 ` [PATCH AUTOSEL 4.9 11/11] iommu/amd: Fix legacy interrupt remapping for x2APIC-enabled system Sasha Levin
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