From: Shannon Zhao <zhaoshenglong@huawei.com>
To: linux-arm-kernel@lists.infradead.org, ard.biesheuvel@linaro.org,
stefano.stabellini@citrix.com, david.vrabel@citrix.com
Cc: mark.rutland@arm.com, devicetree@vger.kernel.org,
linux-efi@vger.kernel.org, ian.campbell@citrix.com,
catalin.marinas@arm.com, will.deacon@arm.com,
linux-kernel@vger.kernel.org, xen-devel@lists.xen.org,
julien.grall@arm.com, shannon.zhao@linaro.org,
peter.huangpeng@huawei.com
Subject: [PATCH v6 03/17] Xen: xlate: Use page_to_xen_pfn instead of page_to_pfn
Date: Thu, 17 Mar 2016 17:57:02 +0800 [thread overview]
Message-ID: <1458208636-12960-4-git-send-email-zhaoshenglong@huawei.com> (raw)
In-Reply-To: <1458208636-12960-1-git-send-email-zhaoshenglong@huawei.com>
From: Shannon Zhao <shannon.zhao@linaro.org>
Make xen_xlate_map_ballooned_pages work with 64K pages. In that case
Kernel pages are 64K in size but Xen pages remain 4K in size. Xen pfns
refer to 4K pages.
Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
---
drivers/xen/xlate_mmu.c | 26 ++++++++++++++++----------
1 file changed, 16 insertions(+), 10 deletions(-)
diff --git a/drivers/xen/xlate_mmu.c b/drivers/xen/xlate_mmu.c
index 9692656..28f728b 100644
--- a/drivers/xen/xlate_mmu.c
+++ b/drivers/xen/xlate_mmu.c
@@ -207,9 +207,12 @@ int __init xen_xlate_map_ballooned_pages(xen_pfn_t **gfns, void **virt,
void *vaddr;
int rc;
unsigned int i;
+ unsigned long nr_pages;
+ xen_pfn_t xen_pfn = 0;
BUG_ON(nr_grant_frames == 0);
- pages = kcalloc(nr_grant_frames, sizeof(pages[0]), GFP_KERNEL);
+ nr_pages = DIV_ROUND_UP(nr_grant_frames, XEN_PFN_PER_PAGE);
+ pages = kcalloc(nr_pages, sizeof(pages[0]), GFP_KERNEL);
if (!pages)
return -ENOMEM;
@@ -218,22 +221,25 @@ int __init xen_xlate_map_ballooned_pages(xen_pfn_t **gfns, void **virt,
kfree(pages);
return -ENOMEM;
}
- rc = alloc_xenballooned_pages(nr_grant_frames, pages);
+ rc = alloc_xenballooned_pages(nr_pages, pages);
if (rc) {
- pr_warn("%s Couldn't balloon alloc %ld pfns rc:%d\n", __func__,
- nr_grant_frames, rc);
+ pr_warn("%s Couldn't balloon alloc %ld pages rc:%d\n", __func__,
+ nr_pages, rc);
kfree(pages);
kfree(pfns);
return rc;
}
- for (i = 0; i < nr_grant_frames; i++)
- pfns[i] = page_to_pfn(pages[i]);
+ for (i = 0; i < nr_grant_frames; i++) {
+ if ((i % XEN_PFN_PER_PAGE) == 0)
+ xen_pfn = page_to_xen_pfn(pages[i / XEN_PFN_PER_PAGE]);
+ pfns[i] = pfn_to_gfn(xen_pfn++);
+ }
- vaddr = vmap(pages, nr_grant_frames, 0, PAGE_KERNEL);
+ vaddr = vmap(pages, nr_pages, 0, PAGE_KERNEL);
if (!vaddr) {
- pr_warn("%s Couldn't map %ld pfns rc:%d\n", __func__,
- nr_grant_frames, rc);
- free_xenballooned_pages(nr_grant_frames, pages);
+ pr_warn("%s Couldn't map %ld pages rc:%d\n", __func__,
+ nr_pages, rc);
+ free_xenballooned_pages(nr_pages, pages);
kfree(pages);
kfree(pfns);
return -ENOMEM;
--
2.0.4
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next prev parent reply other threads:[~2016-03-17 9:57 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-17 9:56 [PATCH v6 00/17] Add ACPI support for Xen Dom0 on ARM64 Shannon Zhao
2016-03-17 9:57 ` [PATCH v6 01/17] Xen: ACPI: Hide UART used by Xen Shannon Zhao
2016-03-17 9:57 ` [PATCH v6 02/17] xen/grant-table: Move xlated_setup_gnttab_pages to common place Shannon Zhao
2016-03-17 9:57 ` Shannon Zhao [this message]
2016-03-17 9:57 ` [PATCH v6 04/17] arm/xen: Use xen_xlate_map_ballooned_pages to setup grant table Shannon Zhao
2016-03-17 9:57 ` [PATCH v6 05/17] xen: memory : Add new XENMAPSPACE type XENMAPSPACE_dev_mmio Shannon Zhao
2016-03-17 9:57 ` [PATCH v6 06/17] Xen: ARM: Add support for mapping platform device mmio Shannon Zhao
2016-03-17 9:57 ` [PATCH v6 07/17] Xen: ARM: Add support for mapping AMBA " Shannon Zhao
2016-03-17 9:57 ` [PATCH v6 08/17] Xen: public/hvm: sync changes of HVM_PARAM_CALLBACK_VIA ABI from Xen Shannon Zhao
2016-03-17 9:57 ` [PATCH v6 09/17] xen/hvm/params: Add a new delivery type for event-channel in HVM_PARAM_CALLBACK_IRQ Shannon Zhao
2016-03-17 9:57 ` [PATCH v6 10/17] arm/xen: Get event-channel irq through HVM_PARAM when booting with ACPI Shannon Zhao
2016-03-17 9:57 ` [PATCH v6 11/17] ARM: XEN: Move xen_early_init() before efi_init() Shannon Zhao
2016-03-17 9:57 ` [PATCH v6 12/17] ARM64: ACPI: Check if it runs on Xen to enable or disable ACPI Shannon Zhao
2016-03-17 9:57 ` [PATCH v6 13/17] ARM: Xen: Document UEFI support on Xen ARM virtual platforms Shannon Zhao
2016-03-17 9:57 ` [PATCH v6 14/17] XEN: EFI: Move x86 specific codes to architecture directory Shannon Zhao
2016-03-17 9:57 ` [PATCH v6 15/17] ARM64: XEN: Add a function to initialize Xen specific UEFI runtime services Shannon Zhao
2016-03-17 9:57 ` [PATCH v6 16/17] FDT: Add a helper to get the subnode by given name Shannon Zhao
2016-03-17 9:57 ` [PATCH v6 17/17] Xen: EFI: Parse DT parameters for Xen specific UEFI Shannon Zhao
[not found] ` <1458208636-12960-2-git-send-email-zhaoshenglong@huawei.com>
2016-03-17 12:59 ` [PATCH v6 01/17] Xen: ACPI: Hide UART used by Xen Rafael J. Wysocki
2016-03-24 12:21 ` [PATCH v6 00/17] Add ACPI support for Xen Dom0 on ARM64 Stefano Stabellini
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