Am Tue, 21 Apr 2015 10:41:51 +1000
schrieb David Gibson da...@gibson.dropbear.id.au:
On POWER, storage caching is usually configured via the MMU - attributes
such as cache-inhibited are stored in the TLB and the hashed page table.
This makes correctly performing cache inhibited IO accesses
On Tue, Apr 21, 2015 at 08:37:02AM +0200, Thomas Huth wrote:
Am Tue, 21 Apr 2015 10:41:51 +1000
schrieb David Gibson da...@gibson.dropbear.id.au:
On POWER, storage caching is usually configured via the MMU - attributes
such as cache-inhibited are stored in the TLB and the hashed page
From: David Gibson da...@gibson.dropbear.id.au
On POWER, storage caching is usually configured via the MMU - attributes
such as cache-inhibited are stored in the TLB and the hashed page table.
This makes correctly performing cache inhibited IO accesses awkward when
the MMU is turned off (real
Hi Paolo / Marcelo,
This is my current patch queue for ppc. Please pull.
Alex
The following changes since commit b79013b2449c23f1f505bdf39c5a6c330338b244:
Merge tag 'staging-4.1-rc1' of
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging (2015-04-13
17:37:33 -0700)
are
From: Suresh Warrier warr...@linux.vnet.ibm.com
Interrupt-based hypercalls return H_TOO_HARD to inform KVM that it needs
to switch to the host to complete the rest of hypercall function in
virtual mode. This patch ports the virtual mode ICS/ICP reject and resend
functions to be runnable in
From: Aneesh Kumar K.V aneesh.ku...@linux.vnet.ibm.com
This adds helper routines for locking and unlocking HPTEs, and uses
them in the rest of the code. We don't change any locking rules in
this patch.
Signed-off-by: Aneesh Kumar K.V aneesh.ku...@linux.vnet.ibm.com
Signed-off-by: Paul Mackerras
From: Paul Mackerras pau...@samba.org
This replaces the assembler code for kvmhv_commence_exit() with C code
in book3s_hv_builtin.c. It also moves the IPI sending code that was
in book3s_hv_rm_xics.c into a new kvmhv_rm_send_ipi() function so it
can be used by kvmhv_commence_exit() as well as
From: Paul Mackerras pau...@samba.org
When running a multi-threaded guest and vcpu 0 in a virtual core
is not running in the guest (i.e. it is busy elsewhere in the host),
thread 0 of the physical core will switch the MMU to the guest and
then go to nap mode in the code at kvm_do_nap. If the
From: Paul Mackerras pau...@samba.org
Currently, the entry_exit_count field in the kvmppc_vcore struct
contains two 8-bit counts, one of the threads that have started entering
the guest, and one of the threads that have started exiting the guest.
This changes it to an entry_exit_map field which
From: Suresh Warrier warr...@linux.vnet.ibm.com
Add two counters to count how often we generate real-mode ICS resend
and reject events. The counters provide some performance statistics
that could be used in the future to consider if the real mode functions
need further optimizing. The counters
From: Suresh E. Warrier warr...@linux.vnet.ibm.com
Add counters to track number of times we switch from guest real mode
to host virtual mode during an interrupt-related hyper call because the
hypercall requires actions that cannot be completed in real mode. This
will help when making
From: Paul Mackerras pau...@samba.org
Previously, if kvmppc_run_core() was running a VCPU that needed a VPA
update (i.e. one of its 3 virtual processor areas needed to be pinned
in memory so the host real mode code can update it on guest entry and
exit), we would drop the vcore lock and do the
From: Paul Mackerras pau...@samba.org
* Remove unused kvmppc_vcore::n_busy field.
* Remove setting of RMOR, since it was only used on PPC970 and the
PPC970 KVM support has been removed.
* Don't use r1 or r2 in setting the runlatch since they are
conventionally reserved for other things; use
From: Michael Ellerman mich...@ellerman.id.au
Some PowerNV systems include a hardware random-number generator.
This HWRNG is present on POWER7+ and POWER8 chips and is capable of
generating one 64-bit random number every microsecond. The random
numbers are produced by sampling a set of 64
From: Paul Mackerras pau...@samba.org
We can tell when a secondary thread has finished running a guest by
the fact that it clears its kvm_hstate.kvm_vcpu pointer, so there
is no real need for the nap_count field in the kvmppc_vcore struct.
This changes kvmppc_wait_for_nap to poll the
From: Paul Mackerras pau...@samba.org
This reads the timebase at various points in the real-mode guest
entry/exit code and uses that to accumulate total, minimum and
maximum time spent in those parts of the code. Currently these
times are accumulated per vcpu in 5 parts of the code:
* rm_entry
From: Paul Mackerras pau...@samba.org
Rather than calling cond_resched() in kvmppc_run_core() before doing
the post-processing for the vcpus that we have just run (that is,
calling kvmppc_handle_exit_hv(), kvmppc_set_timer(), etc.), we now do
that post-processing before calling cond_resched(),
From: Suresh Warrier warr...@linux.vnet.ibm.com
Replaces the ICS mutex lock with a spin lock since we will be porting
these routines to real mode. Note that we need to disable interrupts
before we take the lock in anticipation of the fact that on the guest
side, we are running in the context of a
From: Paul Mackerras pau...@samba.org
On entry to the guest, secondary threads now wait for the primary to
switch the MMU after loading up most of their state, rather than before.
This means that the secondary threads get into the guest sooner, in the
common case where the secondary threads get
From: Paul Mackerras pau...@samba.org
This uses msgsnd where possible for signalling other threads within
the same core on POWER8 systems, rather than IPIs through the XICS
interrupt controller. This includes waking secondary threads to run
the guest, the interrupts generated by the virtual
From: Paul Mackerras pau...@samba.org
This arranges for threads that are napping due to their vcpu having
ceded or due to not having a vcpu to wake up at the end of the guest's
timeslice without having to be poked with an IPI. We do that by
arranging for the decrementer to contain a value no
From: Suresh E. Warrier warr...@linux.vnet.ibm.com
Export __spin_yield so that the arch_spin_unlock() function can
be invoked from a module. This will be required for modules where
we want to take a lock that is also is acquired in hypervisor
real mode. Because we want to avoid running any
From: Paul Mackerras pau...@samba.org
This creates a debugfs directory for each HV guest (assuming debugfs
is enabled in the kernel config), and within that directory, a file
by which the contents of the guest's HPT (hashed page table) can be
read. The directory is named vm, where is
Am Tue, 21 Apr 2015 16:51:21 +1000
schrieb David Gibson da...@gibson.dropbear.id.au:
On Tue, Apr 21, 2015 at 08:37:02AM +0200, Thomas Huth wrote:
Am Tue, 21 Apr 2015 10:41:51 +1000
schrieb David Gibson da...@gibson.dropbear.id.au:
On POWER, storage caching is usually configured via the
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