56 lines
1.9 KiB
Diff
56 lines
1.9 KiB
Diff
From b7e4b3d2a67cf3af83f9226a8f3b7b159d15fba1 Mon Sep 17 00:00:00 2001
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From: Paolo Bonzini <pbonzini@redhat.com>
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Date: Fri, 18 Jul 2025 18:03:47 +0200
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Subject: [PATCH 056/115] i386/tdx: Enable user exit on KVM_HC_MAP_GPA_RANGE
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RH-Author: Paolo Bonzini <pbonzini@redhat.com>
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RH-MergeRequest: 391: TDX support, including attestation and device assignment
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RH-Jira: RHEL-15710 RHEL-20798 RHEL-49728
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RH-Acked-by: Yash Mankad <None>
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RH-Acked-by: Peter Xu <peterx@redhat.com>
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RH-Acked-by: David Hildenbrand <david@redhat.com>
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RH-Commit: [56/115] 88e3d0cfdca0c78873aed608518d75ed1703c5fb (bonzini/rhel-qemu-kvm)
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KVM translates TDG.VP.VMCALL<MapGPA> to KVM_HC_MAP_GPA_RANGE, and QEMU
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needs to enable user exit on KVM_HC_MAP_GPA_RANGE in order to handle the
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memory conversion requested by TD guest.
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Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
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Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
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Link: https://lore.kernel.org/r/20250508150002.689633-28-xiaoyao.li@intel.com
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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(cherry picked from commit 1ff5048d74e661943260c33e864c4118acb37ab4)
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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---
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target/i386/kvm/tdx.c | 7 +++++++
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1 file changed, 7 insertions(+)
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diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c
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index 19ed1038a7..62c83394d0 100644
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--- a/target/i386/kvm/tdx.c
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+++ b/target/i386/kvm/tdx.c
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@@ -19,6 +19,8 @@
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#include "sysemu/sysemu.h"
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#include "exec/ramblock.h"
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+#include <linux/kvm_para.h>
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+
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#include "hw/i386/e820_memory_layout.h"
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#include "hw/i386/tdvf.h"
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#include "hw/i386/x86.h"
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@@ -376,6 +378,11 @@ static int tdx_kvm_init(ConfidentialGuestSupport *cgs, Error **errp)
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}
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}
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+ /* TDX relies on KVM_HC_MAP_GPA_RANGE to handle TDG.VP.VMCALL<MapGPA> */
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+ if (!kvm_enable_hypercall(BIT_ULL(KVM_HC_MAP_GPA_RANGE))) {
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+ return -EOPNOTSUPP;
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+ }
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+
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qemu_add_machine_init_done_notifier(&tdx_machine_done_notify);
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tdx_guest = tdx;
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--
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2.50.1
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