Not committing this yet since KVM does not support I/O breakpoints, but posting it because it is useful for TCG too.
TCG fails the tests because it doesn't preserve DRn_FIXED_1 on mov to dr6 and dr7, and also because it lacks support for ICEBP, but it is easy to fix the former and disable the ICEBP test. Signed-off-by: Paolo Bonzini <[email protected]> --- x86/debug.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) diff --git a/x86/debug.c b/x86/debug.c index d04de23..a71a8ae 100644 --- a/x86/debug.c +++ b/x86/debug.c @@ -11,6 +11,7 @@ #include "libcflat.h" #include "desc.h" +#include "processor.h" static volatile unsigned long bp_addr[10], dr6[10]; static volatile unsigned int n; @@ -71,6 +72,8 @@ int main(int ac, char **av) handle_exception(DB_VECTOR, handle_db); handle_exception(BP_VECTOR, handle_bp); + write_cr4(read_cr4() | X86_CR4_DE); + sw_bp: asm volatile("int3"); report("#BP", bp_addr[0] == (unsigned long)&&sw_bp + 1); @@ -146,5 +149,51 @@ sw_icebp: bp_addr[0] == (unsigned long)&&sw_icebp + 1 && dr6[0] == 0xffff0ff0); + n = 0; + set_dr1((void *)0xe1ul); + set_dr7(0x0020400a); + set_dr6(0); + + asm volatile( + "out %ax,$0xe0\n\t" + "out %al,$0xe1\n\t"); +hw_wp_out1: + + set_dr1((void *)0xe0ul); + set_dr7(0x00e0400a); + asm volatile( + "out %al,$0xe0\n\t"); +hw_wp_out2: + + report("hw I/O port watchpoint (out)", + n == 3 && + bp_addr[0] == ((unsigned long)&&hw_wp_out1 - 2) && + bp_addr[1] == ((unsigned long)&&hw_wp_out1) && + bp_addr[2] == ((unsigned long)&&hw_wp_out2) && + dr6[0] == 0xffff0ff2); + + n = 0; + set_dr1((void *)0xe1ul); + set_dr7(0x0020400a); + set_dr6(0); + + asm volatile( + "in $0xe0,%%ax\n\t" + "in $0xe1,%%al\n\t" : : : "rax"); +hw_wp_in1: + + set_dr1((void *)0xe0ul); + set_dr7(0x00e0400a); + + asm volatile( + "in $0xe0,%%al\n\t" : : : "rax"); +hw_wp_in2: + report("hw I/O port watchpoint (in)", + n == 3 && + bp_addr[0] == ((unsigned long)&&hw_wp_in1 - 2) && + bp_addr[1] == ((unsigned long)&&hw_wp_in1) && + bp_addr[2] == ((unsigned long)&&hw_wp_in2) && + dr6[0] == 0xffff0ff2); + return report_summary(); } -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
