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From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: dave.hansen@intel.com, tglx@linutronix.de, mingo@redhat.com,
	bp@alien8.de
Cc: decui@microsoft.com, rick.p.edgecombe@intel.com,
	sathyanarayanan.kuppuswamy@linux.intel.com, seanjc@google.com,
	thomas.lendacky@amd.com, x86@kernel.org,
	linux-kernel@vger.kernel.org,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: [PATCHv2 3/3] x86/mm: Fix enc_status_change_finish_noop()
Date: Fri, 26 May 2023 15:02:25 +0300	[thread overview]
Message-ID: <20230526120225.31936-4-kirill.shutemov@linux.intel.com> (raw)
In-Reply-To: <20230526120225.31936-1-kirill.shutemov@linux.intel.com>

enc_status_change_finish_noop() defined as always-fail now which
doesn't make sense for noop.

The change doesn't have user-visible effect because it only gets
called if the platform has CC_ATTR_MEM_ENCRYPT. All platforms with
the attribute override the callback with own implementation.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
 arch/x86/kernel/x86_init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index f230d4d7d8eb..64664311ac2b 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -131,7 +131,7 @@ struct x86_cpuinit_ops x86_cpuinit = {
 static void default_nmi_init(void) { };
 
 static bool enc_status_change_prepare_noop(unsigned long vaddr, int npages, bool enc) { return true; }
-static bool enc_status_change_finish_noop(unsigned long vaddr, int npages, bool enc) { return false; }
+static bool enc_status_change_finish_noop(unsigned long vaddr, int npages, bool enc) { return true; }
 static bool enc_tlb_flush_required_noop(bool enc) { return false; }
 static bool enc_cache_flush_required_noop(void) { return false; }
 static bool is_private_mmio_noop(u64 addr) {return false; }
-- 
2.39.3


  parent reply	other threads:[~2023-05-26 12:02 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-26 12:02 [PATCHv2 0/3] x86/tdx: Fix one more load_unaligned_zeropad() issue Kirill A. Shutemov
2023-05-26 12:02 ` [PATCHv2 1/3] x86/mm: Allow guest.enc_status_change_prepare() to fail Kirill A. Shutemov
2023-05-26 21:50   ` Sathyanarayanan Kuppuswamy
2023-05-26 12:02 ` [PATCHv2 2/3] x86/tdx: Fix race between set_memory_encrypted() and load_unaligned_zeropad() Kirill A. Shutemov
2023-05-26 22:10   ` Sathyanarayanan Kuppuswamy
2023-05-30  0:57     ` Kirill A. Shutemov
2023-05-30 12:57       ` Tom Lendacky
2023-05-30 13:22         ` Sathyanarayanan Kuppuswamy
     [not found]           ` <BYAPR21MB1688EF2A57E90FCE02B82F84D748A@BYAPR21MB1688.namprd21.prod.outlook.com>
2023-06-01 18:19             ` Tom Lendacky
2023-06-02 16:11               ` Michael Kelley (LINUX)
2023-06-02 17:05                 ` Tom Lendacky
2023-06-02 17:42                 ` Dave Hansen
2023-06-05 12:12                   ` Kirill A. Shutemov
2023-06-05 23:13   ` Dave Hansen
2023-05-26 12:02 ` Kirill A. Shutemov [this message]
2023-05-30 13:20   ` [PATCHv2 3/3] x86/mm: Fix enc_status_change_finish_noop() Sathyanarayanan Kuppuswamy

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