Re: [Qemu-devel] [PATCH 3/3] target-ppc: use separate indices for various translation modes

[Richard Henderson]

On 02/20/2015 09:57 AM, Paolo Bonzini wrote:
> PowerPC TCG flushes the TLB on every IR/DR change, which basically
> means on every user<->kernel context switch.  Encode IR/DR in the
> MMU index.
> 
> This brings the number of TLB flushes down from ~900000 to ~50000
> for starting up the Debian installer, which is in line with x86
> and gives a ~10% performance improvement.
> 
> Signed-off-by: Paolo Bonzini <address@hidden>
> ---
>  target-ppc/cpu.h         | 12 +++++++-----
>  target-ppc/excp_helper.c |  3 ---
>  target-ppc/helper_regs.h | 15 +++++++++------
>  3 files changed, 16 insertions(+), 14 deletions(-)

I'm not an expert on ppc memory management, but it certainly LGTM.


r~