[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] cpuidle: Fix PV RTC I/O port access hook
# HG changeset patch # User Keir Fraser <keir.fraser@xxxxxxxxxx> # Date 1239879128 -3600 # Node ID b14dc215dd19ce28d95261ca2b5d4d302195926b # Parent 573e6673e9e08328762bf58e7c02f8144c109ec2 cpuidle: Fix PV RTC I/O port access hook Call hook before writing to I/O ports. Only hook single-byte writes. Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx> --- xen/arch/x86/traps.c | 10 ++++++---- 1 files changed, 6 insertions(+), 4 deletions(-) diff -r 573e6673e9e0 -r b14dc215dd19 xen/arch/x86/traps.c --- a/xen/arch/x86/traps.c Wed Apr 15 15:47:25 2009 +0100 +++ b/xen/arch/x86/traps.c Thu Apr 16 11:52:08 2009 +0100 @@ -1564,11 +1564,11 @@ static void guest_io_write( { switch ( bytes ) { case 1: + if ( ((port == 0x70) || (port == 0x71)) && pv_rtc_handler ) + pv_rtc_handler(port, (uint8_t)data); outb((uint8_t)data, port); if ( pv_post_outb_hook ) pv_post_outb_hook(port, (uint8_t)data); - if ( ((port == 0x71) || (port == 0x70)) && pv_rtc_handler ) - pv_rtc_handler(port, (uint8_t)data); break; case 2: outw((uint16_t)data, port); @@ -1937,11 +1937,13 @@ static int emulate_privileged_op(struct goto fail; if ( admin_io_okay(port, op_bytes, v, regs) ) { + if ( (op_bytes == 1) && + ((port == 0x71) || (port == 0x70)) && + pv_rtc_handler ) + pv_rtc_handler(port, regs->eax); io_emul(regs); if ( (op_bytes == 1) && pv_post_outb_hook ) pv_post_outb_hook(port, regs->eax); - if ( ((port == 0x71) || (port == 0x70)) && pv_rtc_handler ) - pv_rtc_handler(port, regs->eax); } else { _______________________________________________ Xen-changelog mailing list Xen-changelog@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-changelog
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