[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PULL 15/17] i386: Hyper-V Support extended GVA ranges for TLB flush hyp
From: |
Paolo Bonzini |
Subject: |
[PULL 15/17] i386: Hyper-V Support extended GVA ranges for TLB flush hypercalls |
Date: |
Wed, 25 May 2022 21:28:50 +0200 |
From: Vitaly Kuznetsov <vkuznets@redhat.com>
KVM kind of supported "extended GVA ranges" (up to 4095 additional GFNs
per hypercall) since the implementation of Hyper-V PV TLB flush feature
(Linux-4.18) as regardless of the request, full TLB flush was always
performed. "Extended GVA ranges for TLB flush hypercalls" feature bit
wasn't exposed then. Now, as KVM gains support for fine-grained TLB
flush handling, exposing this feature starts making sense.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20220525115949.1294004-5-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
docs/hyperv.txt | 7 +++++++
target/i386/cpu.h | 1 +
target/i386/kvm/hyperv-proto.h | 1 +
target/i386/cpu.c | 2 ++
target/i386/kvm/kvm.c | 8 ++++++++
5 files changed, 19 insertions(+)
diff --git a/docs/hyperv.txt b/docs/hyperv.txt
index af1b10c0b3..4b132b1c94 100644
--- a/docs/hyperv.txt
+++ b/docs/hyperv.txt
@@ -255,6 +255,13 @@ Hyper-V specification allows to pass parameters for
certain hypercalls using XMM
registers ("XMM Fast Hypercall Input"). When the feature is in use, it allows
for faster hypercalls processing as KVM can avoid reading guest's memory.
+3.24. hv-tlbflush-ext
+=====================
+Allow for extended GVA ranges to be passed to Hyper-V TLB flush hypercalls
+(HvFlushVirtualAddressList/HvFlushVirtualAddressListEx).
+
+Requires: hv-tlbflush
+
4. Supplementary features
=========================
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 37e9553584..5ff48257e5 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -1108,6 +1108,7 @@ uint64_t x86_cpu_get_supported_feature_word(FeatureWord w,
#define HYPERV_FEAT_SYNDBG 16
#define HYPERV_FEAT_MSR_BITMAP 17
#define HYPERV_FEAT_XMM_INPUT 18
+#define HYPERV_FEAT_TLBFLUSH_EXT 19
#ifndef HYPERV_SPINLOCK_NEVER_NOTIFY
#define HYPERV_SPINLOCK_NEVER_NOTIFY 0xFFFFFFFF
diff --git a/target/i386/kvm/hyperv-proto.h b/target/i386/kvm/hyperv-proto.h
index f5f16474fa..c7854ed6d3 100644
--- a/target/i386/kvm/hyperv-proto.h
+++ b/target/i386/kvm/hyperv-proto.h
@@ -59,6 +59,7 @@
#define HV_FREQUENCY_MSRS_AVAILABLE (1u << 8)
#define HV_GUEST_CRASH_MSR_AVAILABLE (1u << 10)
#define HV_FEATURE_DEBUG_MSRS_AVAILABLE (1u << 11)
+#define HV_EXT_GVA_RANGES_FLUSH_AVAILABLE (1u << 14)
#define HV_STIMER_DIRECT_MODE_AVAILABLE (1u << 19)
/*
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 63cec0ea68..3429a4e455 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -6972,6 +6972,8 @@ static Property x86_cpu_properties[] = {
HYPERV_FEAT_MSR_BITMAP, 0),
DEFINE_PROP_BIT64("hv-xmm-input", X86CPU, hyperv_features,
HYPERV_FEAT_XMM_INPUT, 0),
+ DEFINE_PROP_BIT64("hv-tlbflush-ext", X86CPU, hyperv_features,
+ HYPERV_FEAT_TLBFLUSH_EXT, 0),
DEFINE_PROP_ON_OFF_AUTO("hv-no-nonarch-coresharing", X86CPU,
hyperv_no_nonarch_cs, ON_OFF_AUTO_OFF),
DEFINE_PROP_BIT64("hv-syndbg", X86CPU, hyperv_features,
diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c
index 7e6f934eda..a11c8e88f6 100644
--- a/target/i386/kvm/kvm.c
+++ b/target/i386/kvm/kvm.c
@@ -987,6 +987,14 @@ static struct {
.bits = HV_HYPERCALL_XMM_INPUT_AVAILABLE}
}
},
+ [HYPERV_FEAT_TLBFLUSH_EXT] = {
+ .desc = "Extended gva ranges for TLB flush hypercalls
(hv-tlbflush-ext)",
+ .flags = {
+ {.func = HV_CPUID_FEATURES, .reg = R_EDX,
+ .bits = HV_EXT_GVA_RANGES_FLUSH_AVAILABLE}
+ },
+ .dependencies = BIT(HYPERV_FEAT_TLBFLUSH)
+ },
};
static struct kvm_cpuid2 *try_get_hv_cpuid(CPUState *cs, int max,
--
2.36.1
- [PULL 04/17] thread-pool: replace semaphore with condition variable, (continued)
- [PULL 04/17] thread-pool: replace semaphore with condition variable, Paolo Bonzini, 2022/05/25
- [PULL 05/17] thread-pool: remove stopping variable, Paolo Bonzini, 2022/05/25
- [PULL 06/17] contrib/elf2dmp: add ELF dump header checking, Paolo Bonzini, 2022/05/25
- [PULL 08/17] hw/audio/ac97: Remove unimplemented reset functions, Paolo Bonzini, 2022/05/25
- [PULL 07/17] hw/audio/ac97: Coding style fixes to avoid checkpatch errors, Paolo Bonzini, 2022/05/25
- [PULL 09/17] hw/audio/ac97: Remove unneeded local variables, Paolo Bonzini, 2022/05/25
- [PULL 10/17] target/i386/kvm: Fix disabling MPX on "-cpu host" with MPX-capable host, Paolo Bonzini, 2022/05/25
- [PULL 11/17] ide_ioport_read: Return lower octet of data register instead of 0xFF, Paolo Bonzini, 2022/05/25
- [PULL 12/17] i386: Use hv_build_cpuid_leaf() for HV_CPUID_NESTED_FEATURES, Paolo Bonzini, 2022/05/25
- [PULL 14/17] i386: Hyper-V XMM fast hypercall input feature, Paolo Bonzini, 2022/05/25
- [PULL 15/17] i386: Hyper-V Support extended GVA ranges for TLB flush hypercalls,
Paolo Bonzini <=
- [PULL 13/17] i386: Hyper-V Enlightened MSR bitmap feature, Paolo Bonzini, 2022/05/25
- [PULL 16/17] i386: Hyper-V Direct TLB flush hypercall, Paolo Bonzini, 2022/05/25
- [PULL 17/17] i386: docs: Convert hyperv.txt to rST, Paolo Bonzini, 2022/05/25
- Re: [PULL 00/17] Misc patches for 2022-05-25, Richard Henderson, 2022/05/25