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Date: Sun, 17 Jun 2007 12:43:43 +0300 From: Avi Kivity <avi@...ranet.com> To: kvm-devel@...ts.sourceforge.net Cc: linux-kernel@...r.kernel.org, Anthony Liguori <aliguori@...ibm.com>, Avi Kivity <avi@...ranet.com> Subject: [PATCH 02/58] KVM: SVM: Allow direct guest access to PC debug port From: Anthony Liguori <aliguori@...ibm.com> The PC debug port is used for IO delay and does not require emulation. Signed-off-by: Anthony Liguori <aliguori@...ibm.com> Signed-off-by: Avi Kivity <avi@...ranet.com> --- drivers/kvm/svm.c | 8 +++++--- 1 files changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c index fa17d6d..6cd6a50 100644 --- a/drivers/kvm/svm.c +++ b/drivers/kvm/svm.c @@ -378,7 +378,7 @@ static __init int svm_hardware_setup(void) int cpu; struct page *iopm_pages; struct page *msrpm_pages; - void *msrpm_va; + void *iopm_va, *msrpm_va; int r; kvm_emulator_want_group7_invlpg(); @@ -387,8 +387,10 @@ static __init int svm_hardware_setup(void) if (!iopm_pages) return -ENOMEM; - memset(page_address(iopm_pages), 0xff, - PAGE_SIZE * (1 << IOPM_ALLOC_ORDER)); + + iopm_va = page_address(iopm_pages); + memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER)); + clear_bit(0x80, iopm_va); /* allow direct access to PC debug port */ iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT; -- 1.5.0.6 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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