[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v2 2/7] x86/hvm: introduce a define for the debug output IO port
No functional change intended. Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx> --- Cc: Jan Beulich <jbeulich@xxxxxxxx> Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> Cc: Wei Liu <wei.liu2@xxxxxxxxxx> Cc: George Dunlap <George.Dunlap@xxxxxxxxxxxxx> Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx> Cc: Julien Grall <julien.grall@xxxxxxx> Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx> Cc: Tim Deegan <tim@xxxxxxx> --- xen/arch/x86/hvm/hvm.c | 4 ++-- xen/drivers/char/console.c | 2 +- xen/include/public/arch-x86/xen.h | 6 ++++++ 3 files changed, 9 insertions(+), 3 deletions(-) diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c index af13de3745..c3e6cccc4a 100644 --- a/xen/arch/x86/hvm/hvm.c +++ b/xen/arch/x86/hvm/hvm.c @@ -545,7 +545,7 @@ static int hvm_print_line( struct domain *cd = current->domain; char c = *val; - ASSERT(bytes == 1 && port == 0xe9); + ASSERT(bytes == 1 && port == XEN_HVM_DEBUGCONS_IOPORT); /* Deny any input requests. */ if ( dir != IOREQ_WRITE ) @@ -654,7 +654,7 @@ int hvm_domain_initialise(struct domain *d) rtc_init(d); - register_portio_handler(d, 0xe9, 1, hvm_print_line); + register_portio_handler(d, XEN_HVM_DEBUGCONS_IOPORT, 1, hvm_print_line); if ( hvm_tsc_scaling_supported ) d->arch.hvm.tsc_scaling_ratio = hvm_default_tsc_scaling_ratio; diff --git a/xen/drivers/char/console.c b/xen/drivers/char/console.c index 3b75f7a472..734abd2552 100644 --- a/xen/drivers/char/console.c +++ b/xen/drivers/char/console.c @@ -458,7 +458,7 @@ static inline void xen_console_write_debug_port(const char *buf, size_t len) unsigned long tmp; asm volatile ( "rep outsb;" : "=&S" (tmp), "=&c" (tmp) - : "0" (buf), "1" (len), "d" (0xe9) ); + : "0" (buf), "1" (len), "d" (XEN_HVM_DEBUGCONS_IOPORT) ); } #endif diff --git a/xen/include/public/arch-x86/xen.h b/xen/include/public/arch-x86/xen.h index 69ee4bc40d..5c8f7dd40f 100644 --- a/xen/include/public/arch-x86/xen.h +++ b/xen/include/public/arch-x86/xen.h @@ -346,6 +346,12 @@ struct xen_arch_domainconfig { #define XEN_CPUID XEN_EMULATE_PREFIX "cpuid" #endif +/* + * Debug console IO port, also called "port E9 hack". Each character written + * to this IO port will be printed on the hypervisor console. + */ +#define XEN_HVM_DEBUGCONS_IOPORT 0xe9 + #endif /* __XEN_PUBLIC_ARCH_X86_XEN_H__ */ /* -- 2.19.1 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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