Re: [PATCH 3/6] powerpc: Make syscalls save and restore gprs

2022-06-01 Thread Christophe Leroy
Le 01/06/2022 à 07:48, Rohan McLure a écrit : > [Vous ne recevez pas souvent de courriers de la part de > rmcl...@linux.ibm.com. Découvrez pourquoi cela peut être important à > l'adresse https://aka.ms/LearnAboutSenderIdentification.] > > Clears user state in gprs to reduce the influence of us

[PATCH 3/6] powerpc: Make syscalls save and restore gprs

2022-05-31 Thread Rohan McLure
Clears user state in gprs to reduce the influence of user registers on speculation within kernel syscall handlers. Remove conditional branches on result of `syscall_exit_prepare` to restore non-volatile gprs, as these registers are always cleared and hence always must be restored. Signed-off-by: