linux-kernel - [PATCH 5/7] fixup! KVM: TDX: Implement hooks to propagate changes of TDP MMU mirror page table

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Message-ID: <20250113021301.18962-1-yan.y.zhao@intel.com>
Date: Mon, 13 Jan 2025 10:13:00 +0800
From: Yan Zhao <yan.y.zhao@...el.com>
To: pbonzini@...hat.com,
	seanjc@...gle.com,
	kvm@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	rick.p.edgecombe@...el.com,
	kai.huang@...el.com,
	adrian.hunter@...el.com,
	reinette.chatre@...el.com,
	xiaoyao.li@...el.com,
	tony.lindgren@...el.com,
	binbin.wu@...ux.intel.com,
	dmatlack@...gle.com,
	isaku.yamahata@...el.com,
	isaku.yamahata@...il.com
Subject: [PATCH 5/7] fixup! KVM: TDX: Implement hooks to propagate changes of TDP MMU mirror page table

Return -EBUSY instead of -EAGAIN when tdh_mem_sept_add() encounters any err
of TDX_OPERAND_BUSY.

Signed-off-by: Yan Zhao <yan.y.zhao@...el.com>
---
 arch/x86/kvm/vmx/tdx.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c
index 09677a4cd605..4fb9faca5db2 100644
--- a/arch/x86/kvm/vmx/tdx.c
+++ b/arch/x86/kvm/vmx/tdx.c
@@ -1740,8 +1740,9 @@ int tdx_sept_link_private_spt(struct kvm *kvm, gfn_t gfn,
 
 	err = tdh_mem_sept_add(to_kvm_tdx(kvm)->tdr_pa, gpa, tdx_level, hpa, &entry,
 			       &level_state);
-	if (unlikely(err == TDX_ERROR_SEPT_BUSY))
-		return -EAGAIN;
+	if (unlikely(err & TDX_OPERAND_BUSY))
+		return -EBUSY;
+
 	if (KVM_BUG_ON(err, kvm)) {
 		pr_tdx_error_2(TDH_MEM_SEPT_ADD, err, entry, level_state);
 		return -EIO;
-- 
2.43.2