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authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2012-08-16 11:31:27 -0400
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2012-08-16 13:05:25 -0400
commitca08649eb5dd30f11a5a8fe8659b48899b7ea6a1 (patch)
treeb1ab10ebec723a22034e1ae8dc2c975b293774ab /drivers/xen
parent5bc6f9888db5739abfa0cae279b4b442e4db8049 (diff)
downloadlinux-linaro-stable-ca08649eb5dd30f11a5a8fe8659b48899b7ea6a1.tar.gz
Revert "xen PVonHVM: move shared_info to MMIO before kexec"
This reverts commit 00e37bdb0113a98408de42db85be002f21dbffd3. During shutdown of PVHVM guests with more than 2VCPUs on certain machines we can hit the race where the replaced shared_info is not replaced fast enough and the PV time clock retries reading the same area over and over without any any success and is stuck in an infinite loop. Acked-by: Olaf Hering <olaf@aepfle.de> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/platform-pci.c15
1 files changed, 0 insertions, 15 deletions
diff --git a/drivers/xen/platform-pci.c b/drivers/xen/platform-pci.c
index d4c50d63acbc..97ca359ae2bd 100644
--- a/drivers/xen/platform-pci.c
+++ b/drivers/xen/platform-pci.c
@@ -101,19 +101,6 @@ static int platform_pci_resume(struct pci_dev *pdev)
return 0;
}
-static void __devinit prepare_shared_info(void)
-{
-#ifdef CONFIG_KEXEC
- unsigned long addr;
- struct shared_info *hvm_shared_info;
-
- addr = alloc_xen_mmio(PAGE_SIZE);
- hvm_shared_info = ioremap(addr, PAGE_SIZE);
- memset(hvm_shared_info, 0, PAGE_SIZE);
- xen_hvm_prepare_kexec(hvm_shared_info, addr >> PAGE_SHIFT);
-#endif
-}
-
static int __devinit platform_pci_init(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
@@ -151,8 +138,6 @@ static int __devinit platform_pci_init(struct pci_dev *pdev,
platform_mmio = mmio_addr;
platform_mmiolen = mmio_len;
- prepare_shared_info();
-
if (!xen_have_vector_callback) {
ret = xen_allocate_irq(pdev);
if (ret) {