From: Richard Henderson <richard.henderson@linaro.org>
To: Lucas Mateus Martins Araujo e Castro
<lucas.araujo@eldorado.org.br>,
"Bruno Larsen (billionai)" <bruno.larsen@eldorado.org.br>,
qemu-devel@nongnu.org
Cc: farosas@linux.ibm.com, luis.pires@eldorado.org.br,
fernando.valle@eldorado.org.br, qemu-ppc@nongnu.org,
matheus.ferst@eldorado.org.br, david@gibson.dropbear.id.au
Subject: Re: [PATCH 09/11] include/exec: added functions to the stubs in exec-all.h
Date: Thu, 13 May 2021 18:44:01 -0500 [thread overview]
Message-ID: <aad60a0c-1f07-24ab-821a-193047e4ad2e@linaro.org> (raw)
In-Reply-To: <f0fbb69b-76e9-c951-f18d-cfc4629f5f2a@eldorado.org.br>
On 5/13/21 9:03 AM, Lucas Mateus Martins Araujo e Castro wrote:
> tlb_set_page is called by many ppc_hash64_handle_mmu_fault,
> ppc_radix64_handle_mmu_fault and ppc_hash32_handle_mmu_fault, all of which from
> what I've seen are only used inside #if defined(CONFIG_SOFTMMU).
tlb_set_page should only be called from one place: ppc_cpu_tlb_fill. The other
functions should fill in data, much like get_physical_address.
> So what is the
> best way to deal with these tlb_set_page calls? Should these part of the
> _handle_mmu_fault functions never be reached or should these functions never be
> called?
There is some duplication between get_physical_address* and *handle_mmu_fault
that should be fixed.
What should be happening is that you have one function (per mmu type) that
takes a virtual address and resolves a physical address. This bit of code
should be written so that it is usable by both
CPUClass.get_phys_page_attrs_debug and TCGCPUOps.tlb_fill. It appears as if
ppc_radix64_xlate is the right interface for this.
It appears that real mode handling is duplicated between hash64 and radix64,
which could be unified.
You should only call tlb_set_page from TCGCPUOps.tlb_fill, aka
ppc_cpu_tlb_fill. TCGCPUOps.tlb_fill is obviously TCG only.
The version you are looking at here is system emulation specific (sysemu,
!defined(CONFIG_USER_ONLY)). There is a second version of this function, with
the same signature, that is used for user emulation in the helpfully named
user_only_helper.c.
r~
next prev parent reply other threads:[~2021-05-13 23:45 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-12 14:08 [RFC PATCH 00/11] target/ppc: add support to disable-tcg Bruno Larsen (billionai)
2021-05-12 14:08 ` [PATCH 01/11] target/ppc: created ppc_{store, get}_vscr for generic vscr usage Bruno Larsen (billionai)
2021-05-12 16:48 ` [PATCH 01/11] target/ppc: created ppc_{store,get}_vscr " Richard Henderson
2021-05-13 3:48 ` David Gibson
2021-05-12 14:08 ` [PATCH 02/11] target/ppc: moved ppc_store_sdr1 to cpu.c Bruno Larsen (billionai)
2021-05-12 16:54 ` Richard Henderson
2021-05-13 3:50 ` David Gibson
2021-05-31 18:17 ` Bruno Piazera Larsen
2021-06-07 3:50 ` David Gibson
2021-05-12 14:08 ` [PATCH 03/11] target/ppc: moved ppc_cpu_dump_state to cpu_init.c Bruno Larsen (billionai)
2021-05-12 16:58 ` Richard Henderson
2021-05-12 17:00 ` Richard Henderson
2021-05-13 3:51 ` David Gibson
2021-05-12 14:08 ` [PATCH 04/11] target/ppc: moved ppc_store_msr into gdbstub.c Bruno Larsen (billionai)
2021-05-12 17:05 ` Richard Henderson
2021-05-13 3:52 ` David Gibson
2021-05-12 14:08 ` [PATCH 05/11] target/ppc: moved ppc_store_lpcr to cpu.c Bruno Larsen (billionai)
2021-05-12 17:07 ` Richard Henderson
2021-05-13 3:53 ` David Gibson
2021-05-12 14:08 ` [PATCH 06/11] target/ppc: updated vscr manipulation in machine.c Bruno Larsen (billionai)
2021-05-12 17:08 ` Richard Henderson
2021-05-13 3:54 ` David Gibson
2021-05-12 14:08 ` [PATCH 07/11] target/ppc: added KVM fallback to fpscr manipulation Bruno Larsen (billionai)
2021-05-12 18:20 ` Richard Henderson
2021-05-12 19:15 ` Bruno Piazera Larsen
2021-05-13 16:36 ` Bruno Piazera Larsen
2021-05-13 22:45 ` Richard Henderson
2021-05-14 11:12 ` Bruno Piazera Larsen
2021-05-12 14:08 ` [RFC PATCH 08/11] target/ppc: wrapped some TCG only logic with ifdefs Bruno Larsen (billionai)
2021-05-12 18:33 ` Richard Henderson
2021-05-12 18:57 ` Bruno Piazera Larsen
2021-05-14 13:29 ` Bruno Piazera Larsen
2021-05-14 14:44 ` Richard Henderson
2021-05-14 16:22 ` Bruno Piazera Larsen
2021-05-17 4:10 ` David Gibson
2021-05-17 16:07 ` Richard Henderson
2021-05-17 4:00 ` David Gibson
2021-05-24 18:01 ` Bruno Piazera Larsen
2021-05-24 20:03 ` Richard Henderson
2021-05-12 14:08 ` [PATCH 09/11] include/exec: added functions to the stubs in exec-all.h Bruno Larsen (billionai)
2021-05-12 18:34 ` Richard Henderson
2021-05-13 14:03 ` Lucas Mateus Martins Araujo e Castro
2021-05-13 23:44 ` Richard Henderson [this message]
2021-05-17 3:58 ` David Gibson
2021-05-17 16:59 ` Lucas Mateus Martins Araujo e Castro
2021-05-17 18:02 ` Richard Henderson
2021-05-18 18:45 ` Bruno Piazera Larsen
2021-05-24 3:18 ` David Gibson
2021-05-17 3:55 ` David Gibson
2021-05-17 11:07 ` Bruno Piazera Larsen
2021-05-24 3:15 ` David Gibson
2021-05-12 14:08 ` [RFC PATCH 10/11] target/ppc: created tcg-stub.c file Bruno Larsen (billionai)
2021-05-12 18:39 ` Richard Henderson
2021-05-12 19:09 ` Bruno Piazera Larsen
2021-05-14 18:07 ` Bruno Piazera Larsen
2021-05-13 3:59 ` David Gibson
2021-05-13 12:56 ` Bruno Piazera Larsen
2021-05-17 3:53 ` David Gibson
2021-05-12 14:08 ` [PATCH 11/11] target/ppc: updated meson.build to support disable-tcg Bruno Larsen (billionai)
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