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authorLinus Torvalds <torvalds@linux-foundation.org>2019-09-20 11:48:06 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-09-20 11:48:06 -0700
commit45824fc0da6e46cc5d563105e1eaaf3098a686f9 (patch)
tree8e57c1f18104ed5f0d74d9eed9dc0365b3c137b8 /drivers/vfio
parent8c2b418c3f95a488f5226870eee68574d323f0f8 (diff)
parentd9101bfa6adc831bda8836c4d774820553c14942 (diff)
Merge tag 'powerpc-5.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc updates from Michael Ellerman: "This is a bit late, partly due to me travelling, and partly due to a power outage knocking out some of my test systems *while* I was travelling. - Initial support for running on a system with an Ultravisor, which is software that runs below the hypervisor and protects guests against some attacks by the hypervisor. - Support for building the kernel to run as a "Secure Virtual Machine", ie. as a guest capable of running on a system with an Ultravisor. - Some changes to our DMA code on bare metal, to allow devices with medium sized DMA masks (> 32 && < 59 bits) to use more than 2GB of DMA space. - Support for firmware assisted crash dumps on bare metal (powernv). - Two series fixing bugs in and refactoring our PCI EEH code. - A large series refactoring our exception entry code to use gas macros, both to make it more readable and also enable some future optimisations. As well as many cleanups and other minor features & fixups. Thanks to: Adam Zerella, Alexey Kardashevskiy, Alistair Popple, Andrew Donnellan, Aneesh Kumar K.V, Anju T Sudhakar, Anshuman Khandual, Balbir Singh, Benjamin Herrenschmidt, Cédric Le Goater, Christophe JAILLET, Christophe Leroy, Christopher M. Riedl, Christoph Hellwig, Claudio Carvalho, Daniel Axtens, David Gibson, David Hildenbrand, Desnes A. Nunes do Rosario, Ganesh Goudar, Gautham R. Shenoy, Greg Kurz, Guerney Hunt, Gustavo Romero, Halil Pasic, Hari Bathini, Joakim Tjernlund, Jonathan Neuschafer, Jordan Niethe, Leonardo Bras, Lianbo Jiang, Madhavan Srinivasan, Mahesh Salgaonkar, Mahesh Salgaonkar, Masahiro Yamada, Maxiwell S. Garcia, Michael Anderson, Nathan Chancellor, Nathan Lynch, Naveen N. Rao, Nicholas Piggin, Oliver O'Halloran, Qian Cai, Ram Pai, Ravi Bangoria, Reza Arbab, Ryan Grimm, Sam Bobroff, Santosh Sivaraj, Segher Boessenkool, Sukadev Bhattiprolu, Thiago Bauermann, Thiago Jung Bauermann, Thomas Gleixner, Tom Lendacky, Vasant Hegde" * tag 'powerpc-5.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (264 commits) powerpc/mm/mce: Keep irqs disabled during lockless page table walk powerpc: Use ftrace_graph_ret_addr() when unwinding powerpc/ftrace: Enable HAVE_FUNCTION_GRAPH_RET_ADDR_PTR ftrace: Look up the address of return_to_handler() using helpers powerpc: dump kernel log before carrying out fadump or kdump docs: powerpc: Add missing documentation reference powerpc/xmon: Fix output of XIVE IPI powerpc/xmon: Improve output of XIVE interrupts powerpc/mm/radix: remove useless kernel messages powerpc/fadump: support holes in kernel boot memory area powerpc/fadump: remove RMA_START and RMA_END macros powerpc/fadump: update documentation about option to release opalcore powerpc/fadump: consider f/w load area powerpc/opalcore: provide an option to invalidate /sys/firmware/opal/core file powerpc/opalcore: export /sys/firmware/opal/core for analysing opal crashes powerpc/fadump: update documentation about CONFIG_PRESERVE_FA_DUMP powerpc/fadump: add support to preserve crash data on FADUMP disabled kernel powerpc/fadump: improve how crashed kernel's memory is reserved powerpc/fadump: consider reserved ranges while releasing memory powerpc/fadump: make crash memory ranges array allocation generic ...
Diffstat (limited to 'drivers/vfio')
-rw-r--r--drivers/vfio/vfio_iommu_spapr_tce.c18
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c
index 8ce9ad21129f..9809369e0ed3 100644
--- a/drivers/vfio/vfio_iommu_spapr_tce.c
+++ b/drivers/vfio/vfio_iommu_spapr_tce.c
@@ -435,7 +435,7 @@ static int tce_iommu_clear(struct tce_container *container,
unsigned long oldhpa;
long ret;
enum dma_data_direction direction;
- unsigned long lastentry = entry + pages;
+ unsigned long lastentry = entry + pages, firstentry = entry;
for ( ; entry < lastentry; ++entry) {
if (tbl->it_indirect_levels && tbl->it_userspace) {
@@ -460,7 +460,7 @@ static int tce_iommu_clear(struct tce_container *container,
direction = DMA_NONE;
oldhpa = 0;
- ret = iommu_tce_xchg(container->mm, tbl, entry, &oldhpa,
+ ret = iommu_tce_xchg_no_kill(container->mm, tbl, entry, &oldhpa,
&direction);
if (ret)
continue;
@@ -476,6 +476,8 @@ static int tce_iommu_clear(struct tce_container *container,
tce_iommu_unuse_page(container, oldhpa);
}
+ iommu_tce_kill(tbl, firstentry, pages);
+
return 0;
}
@@ -518,8 +520,8 @@ static long tce_iommu_build(struct tce_container *container,
hpa |= offset;
dirtmp = direction;
- ret = iommu_tce_xchg(container->mm, tbl, entry + i, &hpa,
- &dirtmp);
+ ret = iommu_tce_xchg_no_kill(container->mm, tbl, entry + i,
+ &hpa, &dirtmp);
if (ret) {
tce_iommu_unuse_page(container, hpa);
pr_err("iommu_tce: %s failed ioba=%lx, tce=%lx, ret=%ld\n",
@@ -536,6 +538,8 @@ static long tce_iommu_build(struct tce_container *container,
if (ret)
tce_iommu_clear(container, tbl, entry, i);
+ else
+ iommu_tce_kill(tbl, entry, pages);
return ret;
}
@@ -572,8 +576,8 @@ static long tce_iommu_build_v2(struct tce_container *container,
if (mm_iommu_mapped_inc(mem))
break;
- ret = iommu_tce_xchg(container->mm, tbl, entry + i, &hpa,
- &dirtmp);
+ ret = iommu_tce_xchg_no_kill(container->mm, tbl, entry + i,
+ &hpa, &dirtmp);
if (ret) {
/* dirtmp cannot be DMA_NONE here */
tce_iommu_unuse_page_v2(container, tbl, entry + i);
@@ -593,6 +597,8 @@ static long tce_iommu_build_v2(struct tce_container *container,
if (ret)
tce_iommu_clear(container, tbl, entry, i);
+ else
+ iommu_tce_kill(tbl, entry, pages);
return ret;
}