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Re: [Qemu-devel] [PATCH for 2.10] tcg: enable MTTCG by default for PPC64
From: |
Alex Bennée |
Subject: |
Re: [Qemu-devel] [PATCH for 2.10] tcg: enable MTTCG by default for PPC64 on x86 |
Date: |
Mon, 10 Apr 2017 10:51:57 +0100 |
User-agent: |
mu4e 0.9.19; emacs 25.2.15 |
Nikunj A Dadhania <address@hidden> writes:
> This enables the multi-threaded system emulation by default for PPC64
> guests using the x86_64 TCG back-end.
Technically this enables it for all backends that can meet the guests
default memory model requirements. So far only the x86 backend defines
one as:
#define TCG_TARGET_DEFAULT_MO (TCG_MO_ALL & ~TCG_MO_ST_LD)
>
> Signed-off-by: Nikunj A Dadhania <address@hidden>
Reviewed-by: Alex Bennée <address@hidden>
> ---
>
> Depends on following patch which fixes the define name:
>
> https://patchwork.ozlabs.org/patch/748840/
>
> ---
> configure | 2 ++
> target/ppc/cpu.h | 2 ++
> 2 files changed, 4 insertions(+)
>
> diff --git a/configure b/configure
> index 4b3b5cd..2a87495 100755
> --- a/configure
> +++ b/configure
> @@ -6008,12 +6008,14 @@ case "$target_name" in
> ppc64)
> TARGET_BASE_ARCH=ppc
> TARGET_ABI_DIR=ppc
> + mttcg=yes
> gdb_xml_files="power64-core.xml power-fpu.xml power-altivec.xml
> power-spe.xml power-vsx.xml"
> ;;
> ppc64le)
> TARGET_ARCH=ppc64
> TARGET_BASE_ARCH=ppc
> TARGET_ABI_DIR=ppc
> + mttcg=yes
> gdb_xml_files="power64-core.xml power-fpu.xml power-altivec.xml
> power-spe.xml power-vsx.xml"
> ;;
> ppc64abi32)
> diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
> index e0ff041..ece535d 100644
> --- a/target/ppc/cpu.h
> +++ b/target/ppc/cpu.h
> @@ -30,6 +30,8 @@
> #define TARGET_LONG_BITS 64
> #define TARGET_PAGE_BITS 12
>
> +#define TCG_GUEST_DEFAULT_MO 0
> +
> /* Note that the official physical address space bits is 62-M where M
> is implementation dependent. I've not looked up M for the set of
> cpus we emulate at the system level. */
--
Alex Bennée