If the MLE kernel is being powered off, rebooted or halted, then SEXIT must be called. Note that the GETSEC[SEXIT] leaf can only be called after a machine_shutdown() has been done on these paths. The machine_shutdown() is not called on a few paths like when poweroff action does not have a poweroff callback (into ACPI code) or when an emergency reset is done. In these cases, just the TXT registers are finalized but SEXIT is skipped.
Signed-off-by: Ross Philipson <[email protected]> Signed-off-by: Daniel P. Smith <[email protected]> --- arch/x86/kernel/reboot.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c index 964f6b0a3d68..b1e6c1972f0b 100644 --- a/arch/x86/kernel/reboot.c +++ b/arch/x86/kernel/reboot.c @@ -13,6 +13,7 @@ #include <linux/objtool.h> #include <linux/pgtable.h> #include <linux/kexec.h> +#include <linux/slaunch.h> #include <acpi/reboot.h> #include <asm/io.h> #include <asm/apic.h> @@ -778,6 +779,12 @@ static void native_machine_restart(char *__unused) if (!reboot_force) machine_shutdown(); + /* + * The comments for slaunch_finalize() provides the explanation for the + * conditions required to do the SEXIT op reflected in the conditional + * parameter do_sexit. + */ + slaunch_finalize(!reboot_force); __machine_emergency_restart(0); } @@ -788,6 +795,8 @@ static void native_machine_halt(void) tboot_shutdown(TB_SHUTDOWN_HALT); + slaunch_finalize(1); + stop_this_cpu(NULL); } @@ -796,8 +805,12 @@ static void native_machine_power_off(void) if (kernel_can_power_off()) { if (!reboot_force) machine_shutdown(); + slaunch_finalize(!reboot_force); do_kernel_power_off(); + } else { + slaunch_finalize(0); } + /* A fallback in case there is no PM info available */ tboot_shutdown(TB_SHUTDOWN_HALT); } @@ -825,6 +838,7 @@ void machine_shutdown(void) void machine_emergency_restart(void) { + slaunch_finalize(0); __machine_emergency_restart(1); } -- 2.43.7
