From: Paolo Bonzini <pbonzini@redhat.com>
To: "Emilio G. Cota" <cota@braap.org>,
qemu-devel@nongnu.org, mttcg@listserver.greensocs.com
Cc: alex.bennee@linaro.org,
Frederic Konrad <fred.konrad@greensocs.com>,
mark.burton@greensocs.com, a.rigo@virtualopensystems.com,
guillaume.delbergue@greensocs.com
Subject: Re: [Qemu-devel] [RFC 13/38] cputlb: add physical address to CPUTLBEntry
Date: Mon, 21 Sep 2015 07:01:37 +0200 [thread overview]
Message-ID: <55FF8F31.2060002@redhat.com> (raw)
In-Reply-To: <1440375847-17603-14-git-send-email-cota@braap.org>
On 24/08/2015 02:23, Emilio G. Cota wrote:
> Having the physical address in the TLB entry will allow us
> to portably obtain the physical address of a memory access,
> which will prove useful when implementing a scalable emulation
> of atomic instructions.
It came to my mind that addr_read and addr_code only differ in the
bottom TARGET_PAGE_BITS bits, and they are always zero in addr_phys.
So we could store addr_code as
addr_read ^ (addr_phys & (TARGET_PAGE_SIZE - 1))
and discard the bottom bits of addr_phys. This would make it possible
to include addr_phys without growing the size of the TLB entry.
Paolo
next prev parent reply other threads:[~2015-09-21 5:01 UTC|newest]
Thread overview: 110+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-24 0:23 [Qemu-devel] [RFC 00/38] MTTCG: i386, user+system mode Emilio G. Cota
2015-08-24 0:23 ` [Qemu-devel] [RFC 01/38] cpu-exec: add missing mmap_lock in tb_find_slow Emilio G. Cota
2015-09-07 15:33 ` Alex Bennée
2015-08-24 0:23 ` [Qemu-devel] [RFC 02/38] hw/i386/kvmvapic: add missing include of tcg.h Emilio G. Cota
2015-09-07 15:49 ` Alex Bennée
2015-09-07 16:11 ` Paolo Bonzini
2015-08-24 0:23 ` [Qemu-devel] [RFC 03/38] cpu-exec: set current_cpu at cpu_exec() Emilio G. Cota
2015-08-24 1:03 ` Paolo Bonzini
2015-08-25 0:41 ` [Qemu-devel] [PATCH 1/4] cpus: add qemu_cpu_thread_init_common() to avoid code duplication Emilio G. Cota
2015-08-25 0:41 ` [Qemu-devel] [PATCH 2/4] linux-user: add helper to set current_cpu before cpu_loop() Emilio G. Cota
2015-08-25 0:41 ` [Qemu-devel] [PATCH 3/4] linux-user: call rcu_(un)register_thread on thread creation/deletion Emilio G. Cota
2015-08-26 0:22 ` Paolo Bonzini
2015-08-25 0:41 ` [Qemu-devel] [PATCH 4/4] bsd-user: add helper to set current_cpu before cpu_loop() Emilio G. Cota
2015-08-25 18:07 ` Emilio G. Cota
2015-08-24 0:23 ` [Qemu-devel] [RFC 04/38] translate-all: remove volatile from have_tb_lock Emilio G. Cota
2015-09-07 15:50 ` Alex Bennée
2015-09-07 16:12 ` Paolo Bonzini
2015-08-24 0:23 ` [Qemu-devel] [RFC 05/38] thread-posix: inline qemu_spin functions Emilio G. Cota
2015-08-24 1:04 ` Paolo Bonzini
2015-08-25 2:30 ` Emilio G. Cota
2015-08-25 19:30 ` Emilio G. Cota
2015-08-25 22:53 ` Paolo Bonzini
2015-08-24 0:23 ` [Qemu-devel] [RFC 06/38] seqlock: add missing 'inline' to seqlock_read_retry Emilio G. Cota
2015-09-07 15:50 ` Alex Bennée
2015-08-24 0:23 ` [Qemu-devel] [RFC 07/38] seqlock: read sequence number atomically Emilio G. Cota
2015-09-07 15:53 ` Alex Bennée
2015-09-07 16:13 ` Paolo Bonzini
2015-08-24 0:23 ` [Qemu-devel] [RFC 08/38] rcu: init rcu_registry_lock after fork Emilio G. Cota
2015-09-08 17:34 ` Alex Bennée
2015-09-08 19:03 ` Emilio G. Cota
2015-09-09 9:35 ` Alex Bennée
2015-08-24 0:23 ` [Qemu-devel] [RFC 09/38] rcu: fix comment with s/rcu_gp_lock/rcu_registry_lock/ Emilio G. Cota
2015-09-10 11:18 ` Alex Bennée
2015-08-24 0:23 ` [Qemu-devel] [RFC 10/38] translate-all: remove obsolete comment about l1_map Emilio G. Cota
2015-09-10 11:59 ` Alex Bennée
2015-08-24 0:23 ` [Qemu-devel] [RFC 11/38] qemu-thread: handle spurious futex_wait wakeups Emilio G. Cota
2015-09-10 13:22 ` Alex Bennée
2015-09-10 17:46 ` Emilio G. Cota
2015-08-24 0:23 ` [Qemu-devel] [RFC 12/38] linux-user: call rcu_(un)register_thread on pthread_(exit|create) Emilio G. Cota
2015-08-25 0:45 ` Emilio G. Cota
2015-08-24 0:23 ` [Qemu-devel] [RFC 13/38] cputlb: add physical address to CPUTLBEntry Emilio G. Cota
2015-09-10 13:49 ` Alex Bennée
2015-09-10 17:50 ` Emilio G. Cota
2015-09-21 5:01 ` Paolo Bonzini [this message]
2015-08-24 0:23 ` [Qemu-devel] [RFC 14/38] softmmu: add helpers to get ld/st physical addresses Emilio G. Cota
2015-08-24 2:02 ` Paolo Bonzini
2015-08-25 2:47 ` Emilio G. Cota
2015-08-24 0:23 ` [Qemu-devel] [RFC 15/38] radix-tree: add generic lockless radix tree module Emilio G. Cota
2015-09-10 14:25 ` Alex Bennée
2015-09-10 18:00 ` Emilio G. Cota
2015-08-24 0:23 ` [Qemu-devel] [RFC 16/38] aie: add module for Atomic Instruction Emulation Emilio G. Cota
2015-08-24 0:23 ` [Qemu-devel] [RFC 17/38] aie: add target helpers Emilio G. Cota
2015-09-17 15:14 ` Alex Bennée
2015-09-21 5:18 ` Paolo Bonzini
2015-09-21 20:59 ` Alex Bennée
2015-08-24 0:23 ` [Qemu-devel] [RFC 18/38] tcg: add fences Emilio G. Cota
2015-09-10 15:28 ` Alex Bennée
2015-08-24 0:23 ` [Qemu-devel] [RFC 19/38] tcg: add tcg_gen_smp_rmb() Emilio G. Cota
2015-09-10 16:01 ` Alex Bennée
2015-09-10 18:05 ` Emilio G. Cota
2015-08-24 0:23 ` [Qemu-devel] [RFC 20/38] tcg/i386: implement fences Emilio G. Cota
2015-08-24 1:32 ` Paolo Bonzini
2015-08-25 3:02 ` Emilio G. Cota
2015-08-25 22:55 ` Paolo Bonzini
2015-08-24 0:23 ` [Qemu-devel] [RFC 21/38] target-i386: emulate atomic instructions + barriers using AIE Emilio G. Cota
2015-09-17 15:30 ` Alex Bennée
2015-08-24 0:23 ` [Qemu-devel] [RFC 22/38] cpu: update interrupt_request atomically Emilio G. Cota
2015-08-24 1:09 ` Paolo Bonzini
2015-08-25 20:36 ` Emilio G. Cota
2015-08-25 22:52 ` Paolo Bonzini
2015-08-24 0:23 ` [Qemu-devel] [RFC 23/38] cpu-exec: grab iothread lock during interrupt handling Emilio G. Cota
2015-09-09 10:13 ` Paolo Bonzini
2015-08-24 0:23 ` [Qemu-devel] [RFC 24/38] cpu-exec: reset mmap_lock after exiting the CPU loop Emilio G. Cota
2015-08-24 2:01 ` Paolo Bonzini
2015-08-25 21:16 ` Emilio G. Cota
2015-08-24 0:23 ` [Qemu-devel] [RFC 25/38] cpu: add barriers around cpu->tcg_exit_req Emilio G. Cota
2015-08-24 2:01 ` Paolo Bonzini
2015-08-24 0:23 ` [Qemu-devel] [RFC 26/38] cpu: protect tb_jmp_cache with seqlock Emilio G. Cota
2015-08-24 1:14 ` Paolo Bonzini
2015-08-25 21:46 ` Emilio G. Cota
2015-08-25 22:49 ` Paolo Bonzini
2015-09-04 8:50 ` Paolo Bonzini
2015-09-04 10:04 ` Paolo Bonzini
2015-08-24 0:23 ` [Qemu-devel] [RFC 27/38] cpu-exec: convert tb_invalidated_flag into a per-TB flag Emilio G. Cota
2015-08-24 0:23 ` [Qemu-devel] [RFC 28/38] cpu-exec: use RCU to perform lockless TB lookups Emilio G. Cota
2015-08-24 0:23 ` [Qemu-devel] [RFC 29/38] tcg: export have_tb_lock Emilio G. Cota
2015-08-24 0:23 ` [Qemu-devel] [RFC 30/38] translate-all: add tb_lock assertions Emilio G. Cota
2015-08-24 0:24 ` [Qemu-devel] [RFC 31/38] cpu: protect l1_map with tb_lock in full-system mode Emilio G. Cota
2015-08-24 1:07 ` Paolo Bonzini
2015-08-25 21:54 ` Emilio G. Cota
2015-08-24 0:24 ` [Qemu-devel] [RFC 32/38] cpu list: convert to RCU QLIST Emilio G. Cota
2015-08-24 0:24 ` [Qemu-devel] [RFC 33/38] cpu: introduce cpu_tcg_sched_work to run work while other CPUs sleep Emilio G. Cota
2015-08-24 1:24 ` Paolo Bonzini
2015-08-25 22:18 ` Emilio G. Cota
2015-08-24 0:24 ` [Qemu-devel] [RFC 34/38] translate-all: use tcg_sched_work for tb_flush Emilio G. Cota
2015-08-24 0:24 ` [Qemu-devel] [RFC 35/38] cputlb: use cpu_tcg_sched_work for tlb_flush_all Emilio G. Cota
2015-08-24 1:29 ` Paolo Bonzini
2015-08-25 22:31 ` Emilio G. Cota
2015-08-26 0:25 ` Paolo Bonzini
2015-09-01 16:10 ` Alex Bennée
2015-09-01 19:38 ` Emilio G. Cota
2015-09-01 20:18 ` Peter Maydell
2015-08-24 0:24 ` [Qemu-devel] [RFC 36/38] cputlb: use tcg_sched_work for tlb_flush_page_all Emilio G. Cota
2015-08-24 0:24 ` [Qemu-devel] [RFC 37/38] cpus: remove async_run_safe_work_on_cpu Emilio G. Cota
2015-08-24 0:24 ` [Qemu-devel] [RFC 38/38] Revert "target-i386: yield to another VCPU on PAUSE" Emilio G. Cota
2015-08-24 1:29 ` Paolo Bonzini
2015-08-24 2:01 ` [Qemu-devel] [RFC 00/38] MTTCG: i386, user+system mode Paolo Bonzini
2015-08-25 22:36 ` Emilio G. Cota
2015-08-24 16:08 ` Artyom Tarasenko
2015-08-24 20:16 ` Emilio G. Cota
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