diff mbox series

[6/7] fixup! KVM: TDX: Implement hooks to propagate changes of TDP MMU mirror page table

Message ID 20250113021312.18976-1-yan.y.zhao@intel.com (mailing list archive)
State New
Headers show
Series KVM: TDX SEPT SEAMCALL retry | expand

Commit Message

Yan Zhao Jan. 13, 2025, 2:13 a.m. UTC 
Remove the retry loop for tdh_phymem_page_wbinvd_hkid().

tdh_phymem_page_wbinvd_hkid() just acquires the lock on the PAMT entry of
the page to be wbinvd, so it's not expected to encounter TDX_OPERAND_BUSY.

Signed-off-by: Yan Zhao <yan.y.zhao@intel.com>
---
 arch/x86/kvm/vmx/tdx.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)
diff mbox series

Patch

diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c
index 4fb9faca5db2..baabae95504b 100644
--- a/arch/x86/kvm/vmx/tdx.c
+++ b/arch/x86/kvm/vmx/tdx.c
@@ -1712,14 +1712,7 @@  static int tdx_sept_drop_private_spte(struct kvm *kvm, gfn_t gfn,
 		return -EIO;
 	}
 
-	do {
-		/*
-		 * TDX_OPERAND_BUSY can happen on locking PAMT entry.  Because
-		 * this page was removed above, other thread shouldn't be
-		 * repeatedly operating on this page.  Just retry loop.
-		 */
-		err = tdh_phymem_page_wbinvd_hkid(hpa, (u16)kvm_tdx->hkid);
-	} while (unlikely(err == (TDX_OPERAND_BUSY | TDX_OPERAND_ID_RCX)));
+	err = tdh_phymem_page_wbinvd_hkid(hpa, (u16)kvm_tdx->hkid);
 
 	if (KVM_BUG_ON(err, kvm)) {
 		pr_tdx_error(TDH_PHYMEM_PAGE_WBINVD, err);