Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752769Ab3FNNRk (ORCPT ); Fri, 14 Jun 2013 09:17:40 -0400 Received: from eddie.linux-mips.org ([78.24.191.182]:37826 "EHLO cvs.linux-mips.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751884Ab3FNNRi (ORCPT ); Fri, 14 Jun 2013 09:17:38 -0400 Date: Fri, 14 Jun 2013 15:17:35 +0200 From: Ralf Baechle To: David Daney Cc: linux-mips@linux-mips.org, kvm@vger.kernel.org, Sanjay Lal , linux-kernel@vger.kernel.org, David Daney Subject: Re: [PATCH 05/31] mips/kvm: Use generic cache flushing functions. Message-ID: <20130614131735.GG15775@linux-mips.org> References: <1370646215-6543-1-git-send-email-ddaney.cavm@gmail.com> <1370646215-6543-6-git-send-email-ddaney.cavm@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1370646215-6543-6-git-send-email-ddaney.cavm@gmail.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1851 Lines: 53 On Fri, Jun 07, 2013 at 04:03:09PM -0700, David Daney wrote: > From: David Daney > > We don't know if we have the r4k specific functions available, so use > universally available __flush_cache_all() instead. This takes longer > as it flushes both i-cache and d-cache, but is available for all CPUs. > > Signed-off-by: David Daney > --- > arch/mips/kvm/kvm_mips_emul.c | 6 ++---- > 1 file changed, 2 insertions(+), 4 deletions(-) > > diff --git a/arch/mips/kvm/kvm_mips_emul.c b/arch/mips/kvm/kvm_mips_emul.c > index af9a661..a2c6687 100644 > --- a/arch/mips/kvm/kvm_mips_emul.c > +++ b/arch/mips/kvm/kvm_mips_emul.c > @@ -916,8 +916,6 @@ kvm_mips_emulate_cache(uint32_t inst, uint32_t *opc, uint32_t cause, > struct kvm_run *run, struct kvm_vcpu *vcpu) > { > struct mips_coproc *cop0 = vcpu->arch.cop0; > - extern void (*r4k_blast_dcache) (void); > - extern void (*r4k_blast_icache) (void); > enum emulation_result er = EMULATE_DONE; > int32_t offset, cache, op_inst, op, base; > struct kvm_vcpu_arch *arch = &vcpu->arch; > @@ -954,9 +952,9 @@ kvm_mips_emulate_cache(uint32_t inst, uint32_t *opc, uint32_t cause, > arch->gprs[base], offset); > > if (cache == MIPS_CACHE_DCACHE) > - r4k_blast_dcache(); Only nukes the D-cache. > + __flush_cache_all(); This is also going to blow away the I-cache, so will be slower. > else if (cache == MIPS_CACHE_ICACHE) > - r4k_blast_icache(); Only nukes the I-cache. > + __flush_cache_all(); This is also going to blow away the D-cache, so will be slower. Ralf -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/