linux-kernel - [PATCHv2 05/12] KVM: TDX: Allocate PAMT memory in __tdx_td

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Message-ID: <20250609191340.2051741-6-kirill.shutemov@linux.intel.com>
Date: Mon,  9 Jun 2025 22:13:33 +0300
From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To: pbonzini@...hat.com,
	seanjc@...gle.com,
	dave.hansen@...ux.intel.com
Cc: rick.p.edgecombe@...el.com,
	isaku.yamahata@...el.com,
	kai.huang@...el.com,
	yan.y.zhao@...el.com,
	chao.gao@...el.com,
	tglx@...utronix.de,
	mingo@...hat.com,
	bp@...en8.de,
	kvm@...r.kernel.org,
	x86@...nel.org,
	linux-coco@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCHv2 05/12] KVM: TDX: Allocate PAMT memory in __tdx_td_init()

Allocate PAMT memory for TDH.MNG.CREATE and TDH.MNG.ADDCX.

PAMT memory that is associated with pages successfully added to the TD
with TDH.MNG.ADDCX will be removed in tdx_reclaim_page() on
tdx_reclaim_control_page().

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
---
 arch/x86/kvm/vmx/tdx.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c
index 7a48bd901536..13796b9a4bc5 100644
--- a/arch/x86/kvm/vmx/tdx.c
+++ b/arch/x86/kvm/vmx/tdx.c
@@ -2370,7 +2370,7 @@ static int __tdx_td_init(struct kvm *kvm, struct td_params *td_params,
 
 	atomic_inc(&nr_configured_hkid);
 
-	tdr_page = alloc_page(GFP_KERNEL);
+	tdr_page = tdx_alloc_page();
 	if (!tdr_page)
 		goto free_hkid;
 
@@ -2383,7 +2383,7 @@ static int __tdx_td_init(struct kvm *kvm, struct td_params *td_params,
 		goto free_tdr;
 
 	for (i = 0; i < kvm_tdx->td.tdcs_nr_pages; i++) {
-		tdcs_pages[i] = alloc_page(GFP_KERNEL);
+		tdcs_pages[i] = tdx_alloc_page();
 		if (!tdcs_pages[i])
 			goto free_tdcs;
 	}
@@ -2504,10 +2504,8 @@ static int __tdx_td_init(struct kvm *kvm, struct td_params *td_params,
 teardown:
 	/* Only free pages not yet added, so start at 'i' */
 	for (; i < kvm_tdx->td.tdcs_nr_pages; i++) {
-		if (tdcs_pages[i]) {
-			__free_page(tdcs_pages[i]);
-			tdcs_pages[i] = NULL;
-		}
+		tdx_free_page(tdcs_pages[i]);
+		tdcs_pages[i] = NULL;
 	}
 	if (!kvm_tdx->td.tdcs_pages)
 		kfree(tdcs_pages);
@@ -2523,15 +2521,13 @@ static int __tdx_td_init(struct kvm *kvm, struct td_params *td_params,
 
 free_tdcs:
 	for (i = 0; i < kvm_tdx->td.tdcs_nr_pages; i++) {
-		if (tdcs_pages[i])
-			__free_page(tdcs_pages[i]);
+		tdx_free_page(tdcs_pages[i]);
 	}
 	kfree(tdcs_pages);
 	kvm_tdx->td.tdcs_pages = NULL;
 
 free_tdr:
-	if (tdr_page)
-		__free_page(tdr_page);
+	tdx_free_page(tdr_page);
 	kvm_tdx->td.tdr_page = 0;
 
 free_hkid:
-- 
2.47.2