- 12 7月, 2011 2 次提交
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由 David Gibson 提交于
This improves I/O performance for guests using the PAPR paravirtualization interface by making the H_PUT_TCE hcall faster, by implementing it in real mode. H_PUT_TCE is used for updating virtual IOMMU tables, and is used both for virtual I/O and for real I/O in the PAPR interface. Since this moves the IOMMU tables into the kernel, we define a new KVM_CREATE_SPAPR_TCE ioctl to allow qemu to create the tables. The ioctl returns a file descriptor which can be used to mmap the newly created table. The qemu driver models use them in the same way as userspace managed tables, but they can be updated directly by the guest with a real-mode H_PUT_TCE implementation, reducing the number of host/guest context switches during guest IO. There are certain circumstances where it is useful for userland qemu to write to the TCE table even if the kernel H_PUT_TCE path is used most of the time. Specifically, allowing this will avoid awkwardness when we need to reset the table. More importantly, we will in the future need to write the table in order to restore its state after a checkpoint resume or migration. Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au> Signed-off-by: NPaul Mackerras <paulus@samba.org> Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Paul Mackerras 提交于
This adds support for KVM running on 64-bit Book 3S processors, specifically POWER7, in hypervisor mode. Using hypervisor mode means that the guest can use the processor's supervisor mode. That means that the guest can execute privileged instructions and access privileged registers itself without trapping to the host. This gives excellent performance, but does mean that KVM cannot emulate a processor architecture other than the one that the hardware implements. This code assumes that the guest is running paravirtualized using the PAPR (Power Architecture Platform Requirements) interface, which is the interface that IBM's PowerVM hypervisor uses. That means that existing Linux distributions that run on IBM pSeries machines will also run under KVM without modification. In order to communicate the PAPR hypercalls to qemu, this adds a new KVM_EXIT_PAPR_HCALL exit code to include/linux/kvm.h. Currently the choice between book3s_hv support and book3s_pr support (i.e. the existing code, which runs the guest in user mode) has to be made at kernel configuration time, so a given kernel binary can only do one or the other. This new book3s_hv code doesn't support MMIO emulation at present. Since we are running paravirtualized guests, this isn't a serious restriction. With the guest running in supervisor mode, most exceptions go straight to the guest. We will never get data or instruction storage or segment interrupts, alignment interrupts, decrementer interrupts, program interrupts, single-step interrupts, etc., coming to the hypervisor from the guest. Therefore this introduces a new KVMTEST_NONHV macro for the exception entry path so that we don't have to do the KVM test on entry to those exception handlers. We do however get hypervisor decrementer, hypervisor data storage, hypervisor instruction storage, and hypervisor emulation assist interrupts, so we have to handle those. In hypervisor mode, real-mode accesses can access all of RAM, not just a limited amount. Therefore we put all the guest state in the vcpu.arch and use the shadow_vcpu in the PACA only for temporary scratch space. We allocate the vcpu with kzalloc rather than vzalloc, and we don't use anything in the kvmppc_vcpu_book3s struct, so we don't allocate it. We don't have a shared page with the guest, but we still need a kvm_vcpu_arch_shared struct to store the values of various registers, so we include one in the vcpu_arch struct. The POWER7 processor has a restriction that all threads in a core have to be in the same partition. MMU-on kernel code counts as a partition (partition 0), so we have to do a partition switch on every entry to and exit from the guest. At present we require the host and guest to run in single-thread mode because of this hardware restriction. This code allocates a hashed page table for the guest and initializes it with HPTEs for the guest's Virtual Real Memory Area (VRMA). We require that the guest memory is allocated using 16MB huge pages, in order to simplify the low-level memory management. This also means that we can get away without tracking paging activity in the host for now, since huge pages can't be paged or swapped. This also adds a few new exports needed by the book3s_hv code. Signed-off-by: NPaul Mackerras <paulus@samba.org> Signed-off-by: NAlexander Graf <agraf@suse.de>
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- 17 5月, 2010 1 次提交
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由 Alexander Graf 提交于
In the process of generalizing as much code as possible, I also moved the shadow vcpu code together to a generic book3s file. Unfortunately the location of the shadow vcpu is different on 32 and 64 bit, so we need a wrapper function to tell us where it is. That sounded like a perfect fit for a subarch specific header file. Here we can put anything that needs to be different between those two. Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 04 8月, 2008 1 次提交
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由 Stephen Rothwell 提交于
from include/asm-powerpc. This is the result of a mkdir arch/powerpc/include/asm git mv include/asm-powerpc/* arch/powerpc/include/asm Followed by a few documentation/comment fixups and a couple of places where <asm-powepc/...> was being used explicitly. Of the latter only one was outside the arch code and it is a driver only built for powerpc. Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 27 4月, 2008 1 次提交
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由 Hollis Blanchard 提交于
This functionality is definitely experimental, but is capable of running unmodified PowerPC 440 Linux kernels as guests on a PowerPC 440 host. (Only tested with 440EP "Bamboo" guests so far, but with appropriate userspace support other SoC/board combinations should work.) See Documentation/powerpc/kvm_440.txt for technical details. [stephen: build fix] Signed-off-by: NHollis Blanchard <hollisb@us.ibm.com> Acked-by: NPaul Mackerras <paulus@samba.org> Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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- 04 10月, 2006 1 次提交
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由 Dave Jones 提交于
kbuild explicitly includes this at build time. Signed-off-by: NDave Jones <davej@redhat.com>
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- 13 9月, 2006 1 次提交
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由 Olof Johansson 提交于
Base patch for PA6T and PA6T-1682M. This introduces the arch/powerpc/platform/pasemi directory, together with basic implementations for various setup. Much of this was based on other platform code, i.e. Maple, etc. Signed-off-by: NOlof Johansson <olof@lixom.net> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 23 6月, 2006 1 次提交
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由 Sascha Hauer 提交于
This is a patch for the Hilscher netx builtin ethernet ports. The netx board support was merged into 2.6.17-git2. The netx is a arm926 based SoC. Signed-off-by: NRobert Schwebel <r.schwebel@pengutronix.de> Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de> -- drivers/net/Kconfig | 11 drivers/net/Makefile | 1 drivers/net/netx-eth.c | 516 ++++++++++++++++++++++++++++++++++++++++ include/asm-arm/arch-netx/eth.h | 27 ++ 4 files changed, 555 insertions(+) Signed-off-by: NJeff Garzik <jeff@garzik.org>
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- 19 6月, 2006 2 次提交
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由 Sascha Hauer 提交于
Patch from Sascha Hauer This patch adds the base support for Hilscher's netX network processors. Signed-off-by: NRobert Schwebel <r.schwebel@pengutronix.de> Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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由 Sascha Hauer 提交于
Patch from Sascha Hauer This patch adds framebuffer support for Hilscher's netX network processors. Signed-off-by: NRobert Schwebel <r.schwebel@pengutronix.de> Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 10 1月, 2006 1 次提交
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由 SAN People 提交于
Patch from SAN People Following changes were made to clock.c: 1) Replaced <asm/hardware/clock.h> with <linux/clk.h> 2) Removed old unused clk_enable & clk_disable. 3) Replaced clk_use/clk_unuse with clk_enable/clk_disable. Otherwise it's the same as the previous patch. Signed-off-by: NAndrew Victor <andrew@sanpeople.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 28 10月, 2005 1 次提交
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由 Russell King 提交于
Including asm/hardware.h into asm/io.h can cause #define clashes between platform specific definitions and driver local definitions. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 17 4月, 2005 1 次提交
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由 Linus Torvalds 提交于
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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