[PATCHv2 3/3] x86/mm: Fix enc_status_change_finish_noop()

Kirill A. Shutemov posted 3 patches 9 months ago
There is a newer version of this series
[PATCHv2 3/3] x86/mm: Fix enc_status_change_finish_noop()
Posted by Kirill A. Shutemov 9 months ago
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
Re: [PATCHv2 3/3] x86/mm: Fix enc_status_change_finish_noop()
Posted by Sathyanarayanan Kuppuswamy 8 months, 4 weeks ago

On 5/26/23 5:02 AM, Kirill A. Shutemov wrote:
> 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.
> 

Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>

> 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; }

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer