| Age | Commit message (Collapse) | Author | Files | Lines |
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Fix the code to properly detect overflow; the 128 bit signed
product must have all zeroes or all ones in the first 65 bits
otherwise OV should be set.
Example:
R3 45F086A5D5887509
R4 0000000000000002
mulldo 3,3,4
Should set XER[OV].
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
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For 64-bit implementations, the mullw result is the 64 bit product
of the sign-extended least significant 32 bits of the source
registers.
Fix the code to properly sign extend the source operands and produce
a 64 bit product.
Example:
R3 00000000002F37A0
R4 41C33D242F816715
mullw 3,3,4
R3 expected : 0008C3146AE0F020
R3 actual : 000000006AE0F020 (without this patch)
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
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On 64-bit implementations, the mullwo result is the 64 bit product of
the signed 32 bit operands. Fix the implementation to properly deposit
the upper 32 bits into the target register.
Example:
R3 0407DED115077586
R4 53778DF3CA992E09
mullwo 3,3,4
R3 expected : FB9D02730D7735B6
R3 actual : 000000000D7735B6 (without this patch)
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
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The rlwimi specification includes the ROTL32 operation, which is defined
to be a left rotation of two copies of the least significant 32 bits of
the source GPR.
The current implementation is incorrect on 64-bit implementations in that
it rotates a single copy of the least significant 32 bits, padding with
zeroes in the most significant bits.
Fix the code to properly implement this ROTL32 operation.
Also fix the special case of MB=31 and ME=0 to copy the entire contents
of the source GPR.
Examples:
R3 FFFFFFFFFFFFFFF0
rlwimi 3,3,29,14,1
R3 expected : 1FFFFFFE3FFFFFFE
R3 actual : 000000003FFFFFFE (without this patch)
R3 ED7EB4DD824F0853
rlwimi 3,3,10,31,0
R3 expected : 3C214E09024F0853
R3 actual : 00000000024F0853 (without this patch)
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
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The rlwnm specification includes the ROTL32 operation, which is defined
to be a left rotation of two copies of the least significant 32 bits of
the source GPR.
The current implementation is incorrect on 64-bit implementations in that
it rotates a single copy of the least significant 32 bits, padding with
zeroes in the most significant bits.
Fix the code to properly implement this ROTL32 operation.
Example:
R3 = 0000000000000002
R4 = 7FFFFFFFFFFFFFFF
rlwnm 3,3,4,31,16
R3 expected : 0000000100000001
R3 actual : 0000000000000001 (without this patch)
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
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The rlwinm specification includes the ROTL32 operation, which is defined
to be a left rotation of two copies of the least significant 32 bits of
the source GPR.
The current implementation is incorrect on 64-bit implementations in that
it rotates a single copy of the least significant 32 bits, padding with
zeroes in the most significant bits.
Fix the code to properly implement this ROTL32 operation.
Example:
R3 = F7487D82EC6F75DF
rlwinm 3,3,5,12,4
R3 expected : 8DEEBBFD880EBBFD
R3 actual : 00000000880EBBFD (without this fix)
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
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MAX_CPUS 256 is inconsistent with qemu supporting upto 255 cpus. This
MAX_CPUS number was percolated back to "virsh capabilities" with wrong
max_cpus.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
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This patch adds hardware breakpoint and hardware watchpoint support
for ppc.
On BOOKE architecture we cannot share debug resources between QEMU
and guest because:
When QEMU is using debug resources then debug exception must
be always enabled. To achieve this we set MSR_DE and also set
MSRP_DEP so guest cannot change MSR_DE.
When emulating debug resource for guest we want guest
to control MSR_DE (enable/disable debug interrupt on need).
So above mentioned two configuration cannot be supported
at the same time. So the result is that we cannot share
debug resources between QEMU and Guest on BOOKE architecture.
In the current design QEMU gets priority over guest,
this means that if QEMU is using debug resources then guest
cannot use them and if guest is using debug resource then
qemu can overwrite them.
When QEMU is not able to handle debug exception then we inject program
exception to guest. Yes program exception NOT debug exception and the
reason is:
1) QEMU and guest not sharing debug resources
2) For software breakpoint QEMU uses a ehpriv-1 instruction;
So there cannot be any reason that we are in qemu with exit reason
KVM_EXIT_DEBUG for guest set debug exception, only possibility is
guest executed ehpriv-1 privilege instruction and that's why we are
injecting program exception.
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
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This patch allow insert/remove software breakpoint.
When QEMU is not able to handle debug exception then we inject
program exception to guest because for software breakpoint QEMU
uses a ehpriv-1 instruction;
So there cannot be any reason that we are in qemu with exit reason
KVM_EXIT_DEBUG for guest set debug exception, only possibility is
guest executed ehpriv-1 privilege instruction and that's why we are
injecting program exception.
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com>
[agraf: make deflect comment booke/book3s agnostic]
Signed-off-by: Alexander Graf <agraf@suse.de>
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This patch synchronizes env->excp_vectors[] with env->iovr[].
This is required for using the existing interrupt injection mechanism
for kvm.
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
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Get trap instruction opcode from KVM and this opcode will
be used for setting software breakpoint in following patch
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
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We currently calculate the final RTAS and FDT location based on
the early estimate of the RMA size, cropped to 256M on KVM since
we only know the real RMA size at reset time which happens much
later in the boot process.
This means the FDT and RTAS end up right below 256M while they
could be much higher, using precious RMA space and limiting
what the OS bootloader can put there which has proved to be
a problem with some OSes (such as when using very large initrd's)
Fortunately, we do the actual copy of the device-tree into guest
memory much later, during reset, late enough to be able to do it
using the final RMA value, we just need to move the calculation
to the right place.
However, RTAS is still loaded too early, so we change the code to
load the tiny blob into qemu memory early on, and then copy it into
guest memory at reset time. It's small enough that the memory usage
doesn't matter.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[aik: fixed errors from checkpatch.pl, defined RTAS_MAX_ADDR]
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
[agraf: fix compilation on 32bit hosts]
Signed-off-by: Alexander Graf <agraf@suse.de>
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A subsequent patch to ppc/spapr needs to load the RTAS blob into
qemu memory rather than target memory (so it can later be copied
into the right spot at machine reset time).
I would use load_image() but it is marked deprecated because it
doesn't take a buffer size as argument, so let's add load_image_size()
that does.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[aik: fixed errors from checkpatch.pl]
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
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We want the associtivity lists of memory and CPU nodes to match but
memory nodes have incorrect domain#3 which is zero for CPU so they won't
match.
This clears domain#3 in the list to match CPUs associtivity lists.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
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In multiple places there is a node0_size variable calculation
which assumes that NUMA node #0 and memory node #0 are the same
things which they are not. Since we are going to change it and
do not want to change it in multiple places, let's make a helper.
This adds a spapr_node0_size() helper and makes use of it.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
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Linux kernel expects nodes to have power-of-two size and
does WARN_ON if this is not the case:
[ 0.041456] WARNING: at drivers/base/memory.c:115
which is:
===
/* Validate blk_sz is a power of 2 and not less than section size */
if ((block_sz & (block_sz - 1)) || (block_sz < MIN_MEMORY_BLOCK_SIZE)) {
WARN_ON(1);
block_sz = MIN_MEMORY_BLOCK_SIZE;
}
===
This splits memory nodes into set of smaller blocks with
a size which is a power of two. This makes sure the start
address of every node is aligned to the node size.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
[agraf: squash windows compile fix in]
Signed-off-by: Alexander Graf <agraf@suse.de>
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Current QEMU does not support memoryless NUMA nodes, however
actual hardware may have them so it makes sense to have a way
to emulate them in QEMU. This prepares SPAPR for that.
This moves 2 calls of spapr_populate_memory_node() into
the existing loop over numa nodes so first several nodes may
have no memory and this still will work.
If there is no numa configuration, the code assumes there is just
a single node at 0 and it has all the guest memory.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
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This finishes refactoring by using the spapr_populate_memory_node helper
for all nodes and removing leftovers from spapr_populate_memory().
This is not a part of the previous patch because the patches look
nicer apart.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
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This moves recurring bits of code related to memory@xxx nodes
creation to a helper.
This makes use of the new helper for node@0.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
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get_boot_devices_list() will malloc memory, spapr_finalize_fdt
doesn't free it.
Signed-off-by: Chenliang <chenliang88@huawei.com>
Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
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When running KVM we have to adhere to host page boundaries for memory slots.
Unfortunately the NVRAM on mac99 is a 4k RAM hole inside of an MMIO flash
area.
So if our host is configured with 64k page size, we can't use the mac99 target
with KVM. This is a real shame, as this limitation is not really an issue - we
can easily map NVRAM somewhere else and at least Linux and Mac OS X use it
at their new location.
So in that emergency case when it's about failing to run at all and moving NVRAM
to a place it shouldn't be at, choose the latter.
This patch enables -M mac99 with KVM on 64k page size hosts.
Signed-off-by: Alexander Graf <agraf@suse.de>
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Useful for identifying the guest/host uniquely within the
guest. Adding following properties to the guest root node.
vm,uuid - uuid of the guest
host-model - Host model number
host-serial - Host machine serial number
hypervisor type - Tells its "kvm"
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
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Fix a typo in the names of a couple of functions
(s/resouce/resource/).
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
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Function pointers in the 64-bit ELFv2 PowerPC ABI are actual (internal)
entry point addresses. However, when invoking a function via a function
pointer, GPR 12 must also be set to this address so that the TOC may be
handled properly.
Add this support to the invocation of a signal handler.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
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Eliminate the stub for the do_setcontext() function for TARGET_PPC64. The
implementation re-uses the existing TARGET_PPC32 code with the only change
being the computation of the address of the register save area.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
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Properly dereference 64-bit PPC ELF V1 ABIT function pointers to signal handlers.
On this platform, function pointers are pointers to structures and the first 64
bits of such a structure contains the function's entry point. The second 64 bits
contains the TOC pointer, which must be placed into GPR 2.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
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Enable the 64-bit PowerPC signal handling code that was previously
disabled via #ifdefs. Specifically:
- Move the target_mcontext (register save area) structure and
append it to the 64-bit target_sigcontext structure. This
provides the space on the stack for saving and restoring
context.
- Define the target_rt_sigframe for 64-bit.
- Adjust the setup_frame and setup_rt_frame routines to properly
select the target_mcontext area and trampoline within the stack
frame; tthis is different for 32-bit and 64-bit implementations.
- Adjust the do_setcontext stub for 64-bit so that it compiles
without warnings.
The 64-bit signal handling code is still not functional after this
change; but the 32-bit code is. Subsequent changes will address
specific issues with the 64-bit code.
Signed-off-by: Tom Musta <tommusta@gmail.com>
[agraf: fix build on 32bit hosts, ppc64abi32]
Signed-off-by: Alexander Graf <agraf@suse.de>
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Split the encoding of the PowerPC sigreturn trampoline from the saving of
register state onto the signal handler stack. This will make it easier
in subsequent patches to deal with variations in the stack frame layouts between
32 and 64 bit PowerPC.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
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The code that sets the stack frame back pointer is incorrect for
the setup_rt_frame() code; qemu will abort (SIGSEGV) in some
environments. The setup_frame code was fixed in commit
beb526b12134a6b6744125deec5a7fe24a8f92e3 but the setup_rt_frame
code was not.
Make the setup_rt_frame code consistent with the setup_frame
code.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
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PAPR compliant guest calls this in absence of kdump. This finally
reaches the guest and can be handled according to the policies set by
higher level tools(like taking dump) for further analysis by tools like
crash.
Linux kernel calls ibm,os-term when extended property of os-term is set.
This makes sure that a return to the linux kernel is gauranteed.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
[agraf: reduce RTAS_TOKEN_MAX]
Signed-off-by: Alexander Graf <agraf@suse.de>
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On PPC we have 2 different styles of KVM: PR and HV. HV can only virtualize
sPAPR guests while PR can virtualize everything that's reasonably close to
the host hardware platform.
As long as only one kernel module (PR or HV) is loaded, the "default" kvm type
is the module that's loaded. So if your hardware only supports PR mode you can
easily spawn a Mac VM.
However, if both HV and PR are loaded we default to HV mode. And in that case
the Mac machines have to explicitly ask for PR mode to get a working VM.
Fix this up by explicitly having the Mac machines ask for PR style KVM. This
fixes bootup of Mac VMs on systems where bot HV and PR kvm modules are loaded
for me.
Signed-off-by: Alexander Graf <agraf@suse.de>
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staging
sanity check for qxl, minor spice display channel tweak.
# gpg: Signature made Tue 02 Sep 2014 09:53:39 BST using RSA key ID D3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg: aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg: aka "Gerd Hoffmann (private) <kraxel@gmail.com>"
* remotes/spice/tags/pull-spice-20140902-1:
spice: use console index as display id
qxl-render: add more sanity checks
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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QEMU system mode page table walks are expensive. Taken by running QEMU
qemu-system-x86_64 system mode on Intel PIN , a TLB miss and walking a
4-level page tables in guest Linux OS takes ~450 X86 instructions on
average.
QEMU system mode TLB is implemented using a directly-mapped hashtable.
This structure suffers from conflict misses. Increasing the
associativity of the TLB may not be the solution to conflict misses as
all the ways may have to be walked in serial.
A victim TLB is a TLB used to hold translations evicted from the
primary TLB upon replacement. The victim TLB lies between the main TLB
and its refill path. Victim TLB is of greater associativity (fully
associative in this patch). It takes longer to lookup the victim TLB,
but its likely better than a full page table walk. The memory
translation path is changed as follows :
Before Victim TLB:
1. Inline TLB lookup
2. Exit code cache on TLB miss.
3. Check for unaligned, IO accesses
4. TLB refill.
5. Do the memory access.
6. Return to code cache.
After Victim TLB:
1. Inline TLB lookup
2. Exit code cache on TLB miss.
3. Check for unaligned, IO accesses
4. Victim TLB lookup.
5. If victim TLB misses, TLB refill
6. Do the memory access.
7. Return to code cache
The advantage is that victim TLB can offer more associativity to a
directly mapped TLB and thus potentially fewer page table walks while
still keeping the time taken to flush within reasonable limits.
However, placing a victim TLB before the refill path increase TLB
refill path as the victim TLB is consulted before the TLB refill. The
performance results demonstrate that the pros outweigh the cons.
some performance results taken on SPECINT2006 train
datasets and kernel boot and qemu configure script on an
Intel(R) Xeon(R) CPU E5620 @ 2.40GHz Linux machine are shown in the
Google Doc link below.
https://docs.google.com/spreadsheets/d/1eiItzekZwNQOal_h-5iJmC4tMDi051m9qidi5_nwvH4/edit?usp=sharing
In summary, victim TLB improves the performance of qemu-system-x86_64 by
11% on average on SPECINT2006, kernelboot and qemu configscript and with
highest improvement of in 26% in 456.hmmer. And victim TLB does not result
in any performance degradation in any of the measured benchmarks. Furthermore,
the implemented victim TLB is architecture independent and is expected to
benefit other architectures in QEMU as well.
Although there are measurement fluctuations, the performance
improvement is very significant and by no means in the range of
noises.
Signed-off-by: Xin Tong <trent.tong@gmail.com>
Message-id: 1407202523-23553-1-git-send-email-trent.tong@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Add instructions of SR opcode format.
Add micro-op generator functions for saturate.
Add helper return from exception (rfe).
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-id: 1409572800-4116-16-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Add instructions of SLR, SSRO and SRO opcode format.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 1409572800-4116-15-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Add instructions of SC opcode format.
Add helper for begin interrupt service routine.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-id: 1409572800-4116-14-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Add instructions of SBR opcode format.
Add gen_loop micro-op generator function.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 1409572800-4116-13-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Add instructions of SBC and SBRN opcode format.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 1409572800-4116-12-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Add instructions of SB opcode format.
Add helper call/ret.
Add micro-op generator functions for branches.
Add makro to generate helper functions.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-id: 1409572800-4116-11-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Add instructions of SSRS and SLRO opcode format.
Add micro-op generator functions for offset loads.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 1409572800-4116-10-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Add instructions of SSR opcode format.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 1409572800-4116-9-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Add instructions of SRR opcode format.
Add helper for add/sub_ssov.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-id: 1409572800-4116-8-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Add instructions of SRC opcode format.
Add micro-op generator functions for add, conditional add/sub and shi/shai.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 1409572800-4116-7-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Add masks and opcodes for decoding TriCore instructions.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 1409572800-4116-6-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Add tcg and cpu model initialization.
Add gen_intermediate_code function.
Activate target in configure and add softmmu config.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-id: 1409572800-4116-5-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Add basic softmmu support for TriCore
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-id: 1409572800-4116-4-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Add basic board to allow systemmode emulation
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-id: 1409572800-4116-3-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Add TriCore target stubs, and QOM cpu, and Maintainer
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-id: 1409572800-4116-2-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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into staging
s390x/kvm: Several updates/fixes/features
1. s390x/kvm: avoid synchronize_rcu's in kernel
----------------------------------------------
The first patches change s390x/kvm code to issue VCPU specific ioctls
from the VCPU thread. This will avoid unnecessary synchronize_rcu in
the kernel, which caused a noticably slowdown with many guest CPUs.
It speeds up all start/restart/reset operations involving cpus
drastically.
2. s390-ccw.img: block size and DASD format support
---------------------------------------------------
The second part changes the s390-ccw bios to IPL (boot) more disk
formats than before. Furthermore a small fix is made to the console
output of the bios.
3. s390: Support for Hotplug of Standby Memory
----------------------------------------------
The third part adds support in s390 for a pool of standby memory,
which can be set online/offline by the guest (ie, via chmem).
The standby pool of memory is allocated as the difference between
the initial memory setting and the maxmem setting.
As part of this work, additional results are provided for the
Read SCP Information SCLP, and new implentation is added for the
Read Storage Element Information, Attach Storage Element,
Assign Storage and Unassign Storage SCLPs, which enables the s390
guest to manipulate the standby memory pool.
This patchset is based on work originally done by Jeng-Fang (Nick)
Wang.
Sample qemu command snippet:
qemu -machine s390-ccw-virtio -m 1024M,maxmem=2048M,slots=32 -enable-kvm
This will allocate 1024M of active memory, and another 1024M
of standby memory. Example output from s390-tools lsmem:
=============================================================================
0x0000000000000000-0x000000000fffffff 256 online no 0-127
0x0000000010000000-0x000000001fffffff 256 online yes 128-255
0x0000000020000000-0x000000003fffffff 512 online no 256-511
0x0000000040000000-0x000000007fffffff 1024 offline - 512-1023
Memory device size : 2 MB
Memory block size : 256 MB
Total online memory : 1024 MB
Total offline memory: 1024 MB
The guest can dynamically enable part or all of the standby pool
via the s390-tools chmem, for example:
chmem -e 512M
And can attempt to dynamically disable:
chmem -d 512M
4. s390x/gdb: various fixes
---------------------------
* Patch 1 fixes a bug where the cc was changed accidentally.
* Patch 2 adds the gdb feature XML files for s390x
* Patch 3 Define acr and fpr registers as coprocessor registers. This allows us
to reuse the feature XML files.
* Patch 4 whitespace fixes
# gpg: Signature made Mon 01 Sep 2014 12:53:39 BST using RSA key ID B5A61C7C
# gpg: Can't check signature: public key not found
* remotes/borntraeger/tags/kvm-s390-20140901:
s390x/gdb: coding style fixes
s390x/gdb: generate target.xml and handle fp/ac as coprocessors
s390x/gdb: add the feature xml files for s390x
s390x/gdb: don't touch the cc if tcg is not enabled
sclp-s390: Add memory hotplug SCLPs
s390-virtio: Apply same memory boundaries as virtio-ccw
virtio-ccw: Include standby memory when calculating storage increment
sclp-s390: Add device to manage s390 memory hotplug
pc-bios/s390-ccw.img binary update
pc-bios/s390-ccw: Do proper console setup
pc-bios/s390-ccw: IPL from DASD with format variations
pc-bios/s390-ccw Really big EAV ECKD DASD handling
pc-bios/s390-ccw Improve ECKD informational message
pc-bios/s390-ccw: handle more ECKD DASD block sizes
pc-bios/s390-ccw: support all virtio block size
s390x/kvm: execute the first cpu reset on the vcpu thread
s390x/kvm: execute "system reset" cpu resets on the vcpu thread
s390x/kvm: execute sigp orders on the target vcpu thread
s390x/kvm: run guest triggered resets on the target vcpu thread
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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... instead of maintaining our own numbering.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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