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From: Huacai Chen <chenhc@lemote.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>
Cc: kvm@vger.kernel.org, linux-mips@vger.kernel.org,
	Fuxin Zhang <zhangfx@lemote.com>,
	Huacai Chen <chenhuacai@gmail.com>,
	Jiaxun Yang <jiaxun.yang@flygoat.com>,
	Huacai Chen <chenhc@lemote.com>
Subject: [PATCH V4 04/14] KVM: MIPS: Add EVENTFD support which is needed by VHOST
Date: Tue, 12 May 2020 18:31:10 +0800	[thread overview]
Message-ID: <1589279480-27722-5-git-send-email-chenhc@lemote.com> (raw)
In-Reply-To: <1589279480-27722-1-git-send-email-chenhc@lemote.com>

Add EVENTFD support for KVM/MIPS, which is needed by VHOST. Tested on
Loongson-3 platform.

Reviewed-by: Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Co-developed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 arch/mips/kvm/Kconfig     | 1 +
 arch/mips/kvm/Makefile    | 2 +-
 arch/mips/kvm/trap_emul.c | 3 +++
 arch/mips/kvm/vz.c        | 3 +++
 4 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/mips/kvm/Kconfig b/arch/mips/kvm/Kconfig
index b91d145..d697752 100644
--- a/arch/mips/kvm/Kconfig
+++ b/arch/mips/kvm/Kconfig
@@ -22,6 +22,7 @@ config KVM
 	select EXPORT_UASM
 	select PREEMPT_NOTIFIERS
 	select KVM_GENERIC_DIRTYLOG_READ_PROTECT
+	select HAVE_KVM_EVENTFD
 	select HAVE_KVM_VCPU_ASYNC_IOCTL
 	select KVM_MMIO
 	select MMU_NOTIFIER
diff --git a/arch/mips/kvm/Makefile b/arch/mips/kvm/Makefile
index 01affc1..0a3cef6 100644
--- a/arch/mips/kvm/Makefile
+++ b/arch/mips/kvm/Makefile
@@ -2,7 +2,7 @@
 # Makefile for KVM support for MIPS
 #
 
-common-objs-y = $(addprefix ../../../virt/kvm/, kvm_main.o coalesced_mmio.o)
+common-objs-y = $(addprefix ../../../virt/kvm/, kvm_main.o coalesced_mmio.o eventfd.o)
 
 EXTRA_CFLAGS += -Ivirt/kvm -Iarch/mips/kvm
 
diff --git a/arch/mips/kvm/trap_emul.c b/arch/mips/kvm/trap_emul.c
index 5a11e83..f464506b 100644
--- a/arch/mips/kvm/trap_emul.c
+++ b/arch/mips/kvm/trap_emul.c
@@ -529,6 +529,9 @@ static int kvm_trap_emul_check_extension(struct kvm *kvm, long ext)
 	case KVM_CAP_MIPS_TE:
 		r = 1;
 		break;
+	case KVM_CAP_IOEVENTFD:
+		r = 1;
+		break;
 	default:
 		r = 0;
 		break;
diff --git a/arch/mips/kvm/vz.c b/arch/mips/kvm/vz.c
index dde2088..17932ab 100644
--- a/arch/mips/kvm/vz.c
+++ b/arch/mips/kvm/vz.c
@@ -2927,6 +2927,9 @@ static int kvm_vz_check_extension(struct kvm *kvm, long ext)
 		r = 2;
 		break;
 #endif
+	case KVM_CAP_IOEVENTFD:
+		r = 1;
+		break;
 	default:
 		r = 0;
 		break;
-- 
2.7.0


  parent reply	other threads:[~2020-05-12 10:32 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-12 10:31 [PATCH V4 00/14] KVM: MIPS: Add Loongson-3 support (Host Side) Huacai Chen
2020-05-12 10:31 ` [PATCH V4 01/14] KVM: MIPS: Define KVM_ENTRYHI_ASID to cpu_asid_mask(&boot_cpu_data) Huacai Chen
2020-05-19 11:49   ` Sasha Levin
2020-05-12 10:31 ` [PATCH V4 02/14] KVM: MIPS: Fix VPN2_MASK definition for variable cpu_vmbits Huacai Chen
2020-05-12 10:31 ` [PATCH V4 03/14] KVM: MIPS: Increase KVM_MAX_VCPUS and KVM_USER_MEM_SLOTS to 16 Huacai Chen
2020-05-12 10:31 ` Huacai Chen [this message]
2020-05-12 10:31 ` [PATCH V4 05/14] KVM: MIPS: Use lddir/ldpte instructions to lookup gpa_mm.pgd Huacai Chen
2020-05-12 10:31 ` [PATCH V4 06/14] KVM: MIPS: Introduce and use cpu_guest_has_ldpte Huacai Chen
2020-05-12 10:31 ` [PATCH V4 07/14] KVM: MIPS: Use root tlb to control guest's CCA for Loongson-3 Huacai Chen
2020-05-12 10:31 ` [PATCH V4 08/14] KVM: MIPS: Let indexed cacheops cause guest exit on Loongson-3 Huacai Chen
2020-05-12 10:31 ` [PATCH V4 09/14] KVM: MIPS: Add more types of virtual interrupts Huacai Chen
2020-05-12 10:31 ` [PATCH V4 10/14] KVM: MIPS: Add Loongson-3 Virtual IPI interrupt support Huacai Chen
2020-05-12 11:48   ` Aleksandar Markovic
2020-05-12 10:31 ` [PATCH V4 11/14] KVM: MIPS: Add CPUCFG emulation for Loongson-3 Huacai Chen
2020-05-12 12:03   ` Aleksandar Markovic
2020-05-12 10:31 ` [PATCH V4 12/14] KVM: MIPS: Add CONFIG6 and DIAG registers emulation Huacai Chen
2020-05-12 12:08   ` Aleksandar Markovic
2020-05-12 14:17     ` Huacai Chen
2020-05-12 10:31 ` [PATCH V4 13/14] KVM: MIPS: Add more MMIO load/store instructions emulation Huacai Chen
2020-05-12 10:31 ` [PATCH V4 14/14] KVM: MIPS: Enable KVM support for Loongson-3 Huacai Chen

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