When setting a timer's config register, timer_sanitize_int_route will
always reset the IRQ route value to what's valid corresponding to the
!HPET_CFG_LEGACY case. This is applied even if the HPET is set to
HPET_CFG_LEGACY.
When some operating systems (e.g. Windows) try to write to a timer
config, they will verify and rewrite the register if the values don't
match what they expect. This causes an unnecessary write to HPET_Tn_CFG.
Note, the HPET specification states that for the Tn_INT_ROUTE_CNF field:
"If the value is not supported by this prarticular timer, then the value
read back will not match what is written. [...] If the LegacyReplacement
Route bit is set, then Timers 0 and 1 will have a different routing, and
this bit field has no effect for those two timers."
Therefore, Xen should not reset timer_int_route if legacy mode is
enabled, regardless of what's in there.
Fixes: ec40d3fe21 ("x86/vhpet: check that the set interrupt route is valid")
Signed-off-by: Tu Dinh <ngoc-tu.dinh@vates.tech>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
The LAML field should follow the TCG PC Client Platform Firmware Profile
Specification Version. Version 1.06 Revision 52 says:
'The TCG ACPI specification uses the field name "Log Area Minimum
Length", but the field value is the actual log area length reserved by
Platform Firmware, not a lower bound.'
Remove the now-unused TPM_LOG_AREA_MINIMUM_SIZE.
No functional change.
Signed-off-by: Tu Dinh <ngoc-tu.dinh@vates.tech>
Acked-by: Jan Beulich <jbeulich@suse.com>
Tu Dinh