From patchwork Mon Apr 5 01:19:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicholas Piggin X-Patchwork-Id: 1462184 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=kvm-ppc-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20161025 header.b=UR+XNTr3; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4FDCXL1NKpz9sWD for ; Mon, 5 Apr 2021 11:20:50 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231827AbhDEBUy (ORCPT ); Sun, 4 Apr 2021 21:20:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39804 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231831AbhDEBUx (ORCPT ); Sun, 4 Apr 2021 21:20:53 -0400 Received: from mail-pg1-x52b.google.com (mail-pg1-x52b.google.com [IPv6:2607:f8b0:4864:20::52b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 97742C061756 for ; Sun, 4 Apr 2021 18:20:46 -0700 (PDT) Received: by mail-pg1-x52b.google.com with SMTP id t140so7141208pgb.13 for ; Sun, 04 Apr 2021 18:20:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=QAMjwOXp/lCYiC25gxUp2qYMVNKEbzScenfHr/CileU=; b=UR+XNTr3cdSQEO6qn2CCnIxss/NMYZnSUCvb05l5Puy7ieMxKWwAAi8gs/+gI2OLuH WsvaiIGc8ivz0JuiAZnj3Db3N8oxE7+r3udwnRJwtc3K/dWkKm76RQcu6WebqfTkTHsz eigvJS99JDMpjAV6n57UuGIJ0i36lLEo+7mIVOiXaAU9CkMnuZkIf1YSR6/l6Cvy0Aji lMU4R9WiFEMDN9os/YofGd6hnMtq5gJk2KYBDwGufeAOGNFj5vQyb6wN1v0ZJYNG+RH6 hHVWEbkJahaXm6S+j5DK2Ucexf6liFnsceYf/Fb0ilNUopir08COTQYCx2E52VU/zpru rWsw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=QAMjwOXp/lCYiC25gxUp2qYMVNKEbzScenfHr/CileU=; b=OjtQJAnck2BxhFGmPdLEq/Do2O4mJBoOWAMj9Q/YRqPwli/hGsASbTuFKYNjlHq7qO wu4RQuCZW4NoRzh3zkxtkhBlOz8SHwUSt8IoJSCqON1smtbc1Cs5hiCgdt2CpxIwEVVn XH6yVedkk+FLozs1EffYnJGdKXGKWVyuNHe/ppr/TqXf6ZUk+kDIEMJxmCDnb+0glRLm SZhuty4vv9+0ZcwZUk92Bg9+ogdQp0n+Emo7Hnd0SMzm9qJs2nD7cSI5AvZG4N2raXsc alx40bsJmco6tXZ1EbwwVlrxhuq1uIM6CfhRd/G5/EGKmRjuFejsqC6P+o2pXNbO1rBU AK+g== X-Gm-Message-State: AOAM5320z292XFgMzlXzyXzWOdjIYcp3t5GQGNPlfDjXOTH/DR9p1eDo 5oVc1/Obo0OKFAYxfIgG/sRQWq/pqwPENw== X-Google-Smtp-Source: ABdhPJwVR3W4sNmLn3dYhjd3yFE4hRc4cmR83jno6etWbNgGqDi5hCAbYfeAkfH/X3zFuJULFQja6A== X-Received: by 2002:a65:404b:: with SMTP id h11mr21094051pgp.25.1617585646011; Sun, 04 Apr 2021 18:20:46 -0700 (PDT) Received: from bobo.ibm.com ([1.132.215.134]) by smtp.gmail.com with ESMTPSA id e3sm14062536pfm.43.2021.04.04.18.20.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 04 Apr 2021 18:20:45 -0700 (PDT) From: Nicholas Piggin To: kvm-ppc@vger.kernel.org Cc: Nicholas Piggin , linuxppc-dev@lists.ozlabs.org, Paul Mackerras , Daniel Axtens , Fabiano Rosas Subject: [PATCH v6 12/48] KVM: PPC: Book3S 64: move KVM interrupt entry to a common entry point Date: Mon, 5 Apr 2021 11:19:12 +1000 Message-Id: <20210405011948.675354-13-npiggin@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20210405011948.675354-1-npiggin@gmail.com> References: <20210405011948.675354-1-npiggin@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm-ppc@vger.kernel.org Rather than bifurcate the call depending on whether or not HV is possible, and have the HV entry test for PR, just make a single common point which does the demultiplexing. This makes it simpler to add another type of exit handler. Acked-by: Paul Mackerras Reviewed-by: Daniel Axtens Reviewed-by: Fabiano Rosas Signed-off-by: Nicholas Piggin --- arch/powerpc/kernel/exceptions-64s.S | 8 +----- arch/powerpc/kvm/Makefile | 3 +++ arch/powerpc/kvm/book3s_64_entry.S | 36 +++++++++++++++++++++++++ arch/powerpc/kvm/book3s_hv_rmhandlers.S | 11 ++------ 4 files changed, 42 insertions(+), 16 deletions(-) create mode 100644 arch/powerpc/kvm/book3s_64_entry.S diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index c9c446ccff54..162595af1ac7 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -208,7 +208,6 @@ do_define_int n .endm #ifdef CONFIG_KVM_BOOK3S_64_HANDLER -#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE /* * All interrupts which set HSRR registers, as well as SRESET and MCE and * syscall when invoked with "sc 1" switch to MSR[HV]=1 (HVMODE) to be taken, @@ -238,13 +237,8 @@ do_define_int n /* * If an interrupt is taken while a guest is running, it is immediately routed - * to KVM to handle. If both HV and PR KVM arepossible, KVM interrupts go first - * to kvmppc_interrupt_hv, which handles the PR guest case. + * to KVM to handle. */ -#define kvmppc_interrupt kvmppc_interrupt_hv -#else -#define kvmppc_interrupt kvmppc_interrupt_pr -#endif .macro KVMTEST name lbz r10,HSTATE_IN_GUEST(r13) diff --git a/arch/powerpc/kvm/Makefile b/arch/powerpc/kvm/Makefile index 2bfeaa13befb..cdd119028f64 100644 --- a/arch/powerpc/kvm/Makefile +++ b/arch/powerpc/kvm/Makefile @@ -59,6 +59,9 @@ kvm-pr-y := \ kvm-book3s_64-builtin-objs-$(CONFIG_KVM_BOOK3S_64_HANDLER) += \ tm.o +kvm-book3s_64-builtin-objs-y += \ + book3s_64_entry.o + ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE kvm-book3s_64-builtin-objs-$(CONFIG_KVM_BOOK3S_64_HANDLER) += \ book3s_rmhandlers.o diff --git a/arch/powerpc/kvm/book3s_64_entry.S b/arch/powerpc/kvm/book3s_64_entry.S new file mode 100644 index 000000000000..7a039ea78f15 --- /dev/null +++ b/arch/powerpc/kvm/book3s_64_entry.S @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#include +#include +#include +#include +#include +#include + +/* + * This is branched to from interrupt handlers in exception-64s.S which set + * IKVM_REAL or IKVM_VIRT, if HSTATE_IN_GUEST was found to be non-zero. + */ +.global kvmppc_interrupt +.balign IFETCH_ALIGN_BYTES +kvmppc_interrupt: + /* + * Register contents: + * R12 = (guest CR << 32) | interrupt vector + * R13 = PACA + * guest R12 saved in shadow VCPU SCRATCH0 + * guest R13 saved in SPRN_SCRATCH0 + */ +#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE + std r9,HSTATE_SCRATCH2(r13) + lbz r9,HSTATE_IN_GUEST(r13) + cmpwi r9,KVM_GUEST_MODE_HOST_HV + beq kvmppc_bad_host_intr +#ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE + cmpwi r9,KVM_GUEST_MODE_GUEST + ld r9,HSTATE_SCRATCH2(r13) + beq kvmppc_interrupt_pr +#endif + b kvmppc_interrupt_hv +#else + b kvmppc_interrupt_pr +#endif diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index 5e634db4809b..f976efb7e4a9 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -1269,16 +1269,8 @@ kvmppc_interrupt_hv: * R13 = PACA * guest R12 saved in shadow VCPU SCRATCH0 * guest R13 saved in SPRN_SCRATCH0 + * guest R9 saved in HSTATE_SCRATCH2 */ - std r9, HSTATE_SCRATCH2(r13) - lbz r9, HSTATE_IN_GUEST(r13) - cmpwi r9, KVM_GUEST_MODE_HOST_HV - beq kvmppc_bad_host_intr -#ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE - cmpwi r9, KVM_GUEST_MODE_GUEST - ld r9, HSTATE_SCRATCH2(r13) - beq kvmppc_interrupt_pr -#endif /* We're now back in the host but in guest MMU context */ li r9, KVM_GUEST_MODE_HOST_HV stb r9, HSTATE_IN_GUEST(r13) @@ -3280,6 +3272,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_P9_TM_HV_ASSIST) * cfar is saved in HSTATE_CFAR(r13) * ppr is saved in HSTATE_PPR(r13) */ +.global kvmppc_bad_host_intr kvmppc_bad_host_intr: /* * Switch to the emergency stack, but start half-way down in