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86 lines
3.1 KiB
86 lines
3.1 KiB
2 months ago
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From 331c58d87dde8b4757e1d1e09d9b16bac2952d22 Mon Sep 17 00:00:00 2001
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From: Xiaoyao Li <xiaoyao.li@intel.com>
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Date: Thu, 30 May 2024 06:16:15 -0500
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Subject: [PATCH 081/100] memory: Introduce
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memory_region_init_ram_guest_memfd()
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RH-Author: Paolo Bonzini <pbonzini@redhat.com>
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RH-MergeRequest: 245: SEV-SNP support
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RH-Jira: RHEL-39544
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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RH-Acked-by: Bandan Das <bdas@redhat.com>
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RH-Acked-by: Vitaly Kuznetsov <vkuznets@redhat.com>
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RH-Commit: [81/91] d5b0898d791f3f90d1acda0230f96ca9bf5be5e4 (bonzini/rhel-qemu-kvm)
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Introduce memory_region_init_ram_guest_memfd() to allocate private
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guset memfd on the MemoryRegion initialization. It's for the use case of
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TDVF, which must be private on TDX case.
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Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
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Signed-off-by: Michael Roth <michael.roth@amd.com>
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Signed-off-by: Pankaj Gupta <pankaj.gupta@amd.com>
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Message-ID: <20240530111643.1091816-4-pankaj.gupta@amd.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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(cherry picked from commit a0aa6db7ce72a08703774107185e639e73e7754c)
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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---
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include/exec/memory.h | 6 ++++++
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system/memory.c | 24 ++++++++++++++++++++++++
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2 files changed, 30 insertions(+)
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diff --git a/include/exec/memory.h b/include/exec/memory.h
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index 679a847685..1e351f6fc8 100644
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--- a/include/exec/memory.h
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+++ b/include/exec/memory.h
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@@ -1603,6 +1603,12 @@ bool memory_region_init_ram(MemoryRegion *mr,
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uint64_t size,
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Error **errp);
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+bool memory_region_init_ram_guest_memfd(MemoryRegion *mr,
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+ Object *owner,
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+ const char *name,
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+ uint64_t size,
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+ Error **errp);
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+
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/**
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* memory_region_init_rom: Initialize a ROM memory region.
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*
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diff --git a/system/memory.c b/system/memory.c
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index c756950c0c..b09065eef3 100644
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--- a/system/memory.c
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+++ b/system/memory.c
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@@ -3606,6 +3606,30 @@ bool memory_region_init_ram(MemoryRegion *mr,
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return true;
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}
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+bool memory_region_init_ram_guest_memfd(MemoryRegion *mr,
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+ Object *owner,
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+ const char *name,
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+ uint64_t size,
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+ Error **errp)
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+{
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+ DeviceState *owner_dev;
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+
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+ if (!memory_region_init_ram_flags_nomigrate(mr, owner, name, size,
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+ RAM_GUEST_MEMFD, errp)) {
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+ return false;
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+ }
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+ /* This will assert if owner is neither NULL nor a DeviceState.
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+ * We only want the owner here for the purposes of defining a
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+ * unique name for migration. TODO: Ideally we should implement
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+ * a naming scheme for Objects which are not DeviceStates, in
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+ * which case we can relax this restriction.
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+ */
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+ owner_dev = DEVICE(owner);
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+ vmstate_register_ram(mr, owner_dev);
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+
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+ return true;
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+}
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+
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bool memory_region_init_rom(MemoryRegion *mr,
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Object *owner,
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const char *name,
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--
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2.39.3
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