From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-x242.google.com (mail-pf0-x242.google.com [IPv6:2607:f8b0:400e:c00::242]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3xTW2B4qY9zDqkX for ; Sat, 12 Aug 2017 02:40:02 +1000 (AEST) Received: by mail-pf0-x242.google.com with SMTP id p13so3885860pfd.4 for ; Fri, 11 Aug 2017 09:40:02 -0700 (PDT) From: Nicholas Piggin To: linuxppc-dev@lists.ozlabs.org Cc: Nicholas Piggin , kvm-ppc@vger.kernel.org, Paul Mackerras Subject: [PATCH v2 12/14] KVM: PPC: Book3S HV: POWER9 can execute stop without a sync sequence Date: Sat, 12 Aug 2017 02:39:10 +1000 Message-Id: <20170811163912.28783-13-npiggin@gmail.com> In-Reply-To: <20170811163912.28783-1-npiggin@gmail.com> References: <20170811163912.28783-1-npiggin@gmail.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reviewed-by: Gautham R. Shenoy Signed-off-by: Nicholas Piggin --- arch/powerpc/kvm/book3s_hv_rmhandlers.S | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index 3e024fd71fe8..edb47738a686 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -2527,7 +2527,17 @@ BEGIN_FTR_SECTION END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) kvm_nap_sequence: /* desired LPCR value in r5 */ -BEGIN_FTR_SECTION +BEGIN_FTR_SECTION /* nap sequence */ + mtspr SPRN_LPCR,r5 + isync + li r0, 0 + std r0, HSTATE_SCRATCH0(r13) + ptesync + ld r0, HSTATE_SCRATCH0(r13) +1: cmpd r0, r0 + bne 1b + nap +FTR_SECTION_ELSE /* stop sequence */ /* * PSSCR bits: exit criterion = 1 (wakeup based on LPCR at sreset) * enable state loss = 1 (allow SMT mode switch) @@ -2539,18 +2549,8 @@ BEGIN_FTR_SECTION li r4, LPCR_PECE_HVEE@higher sldi r4, r4, 32 or r5, r5, r4 -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300) mtspr SPRN_LPCR,r5 - isync - li r0, 0 - std r0, HSTATE_SCRATCH0(r13) - ptesync - ld r0, HSTATE_SCRATCH0(r13) -1: cmpd r0, r0 - bne 1b -BEGIN_FTR_SECTION - nap -FTR_SECTION_ELSE + PPC_STOP ALT_FTR_SECTION_END_IFCLR(CPU_FTR_ARCH_300) b . -- 2.13.3