[Xen-devel] [PATCH v4 4/5] x86/tboot: Fail extended mode reduced hardware sleep

[Ben Guthro <benjamin.guthro@xxxxxxxxxx>]

As tboot currently does not support the reduced hardware sleep
interface, fail this extended call.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Signed-off-by: Ben Guthro <benjamin.guthro@xxxxxxxxxx>
Cc: tboot-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: Gang Wei <gang.wei@xxxxxxxxx>
---
 arch/x86/kernel/tboot.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/tboot.c b/arch/x86/kernel/tboot.c
index f84fe00..57383b2 100644
--- a/arch/x86/kernel/tboot.c
+++ b/arch/x86/kernel/tboot.c
@@ -273,7 +273,8 @@ static void tboot_copy_fadt(const struct acpi_table_fadt 
*fadt)
                offsetof(struct acpi_table_facs, firmware_waking_vector);
 }
 
-static int tboot_sleep(u8 sleep_state, u32 pm1a_control, u32 pm1b_control)
+static int tboot_sleep(u8 sleep_state, u32 pm1a_control, u32 pm1b_control,
+                      bool extended)
 {
        static u32 acpi_shutdown_map[ACPI_S_STATE_COUNT] = {
                /* S0,1,2: */ -1, -1, -1,
@@ -284,6 +285,9 @@ static int tboot_sleep(u8 sleep_state, u32 pm1a_control, 
u32 pm1b_control)
        if (!tboot_enabled())
                return 0;
 
+       if (extended)
+               return -1;
+
        tboot_copy_fadt(&acpi_gbl_FADT);
        tboot->acpi_sinfo.pm1a_cnt_val = pm1a_control;
        tboot->acpi_sinfo.pm1b_cnt_val = pm1b_control;
-- 
1.7.9.5


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