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| author | Michael Kelley <mikelley@microsoft.com> | 2018-08-02 03:08:24 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-08-02 10:20:59 +0200 |
| commit | 6ba34171bcbd10321c6cf554e0c1144d170f9d1a (patch) | |
| tree | 9293b607773988936300e0d2780f9bf11fdbd7c3 /drivers/hv/channel.c | |
| parent | d3b26dd7cb0e3433bfd3c1d4dcf74c6039bb49fb (diff) | |
| download | lwn-6ba34171bcbd10321c6cf554e0c1144d170f9d1a.tar.gz lwn-6ba34171bcbd10321c6cf554e0c1144d170f9d1a.zip | |
Drivers: hv: vmbus: Remove use of slow_virt_to_phys()
slow_virt_to_phys() is only implemented for arch/x86.
Remove its use in arch independent Hyper-V drivers, and
replace with test for vmalloc() address followed by
appropriate v-to-p function. This follows the typical
pattern of other drivers and avoids the need to implement
slow_virt_to_phys() for Hyper-V on ARM64.
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv/channel.c')
| -rw-r--r-- | drivers/hv/channel.c | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c index c3949220b770..741857d80da1 100644 --- a/drivers/hv/channel.c +++ b/drivers/hv/channel.c @@ -29,12 +29,26 @@ #include <linux/hyperv.h> #include <linux/uio.h> #include <linux/interrupt.h> +#include <asm/page.h> #include "hyperv_vmbus.h" #define NUM_PAGES_SPANNED(addr, len) \ ((PAGE_ALIGN(addr + len) >> PAGE_SHIFT) - (addr >> PAGE_SHIFT)) +static unsigned long virt_to_hvpfn(void *addr) +{ + unsigned long paddr; + + if (is_vmalloc_addr(addr)) + paddr = page_to_phys(vmalloc_to_page(addr)) + + offset_in_page(addr); + else + paddr = __pa(addr); + + return paddr >> PAGE_SHIFT; +} + /* * vmbus_setevent- Trigger an event notification on the specified * channel. @@ -298,8 +312,8 @@ static int create_gpadl_header(void *kbuffer, u32 size, gpadl_header->range[0].byte_offset = 0; gpadl_header->range[0].byte_count = size; for (i = 0; i < pfncount; i++) - gpadl_header->range[0].pfn_array[i] = slow_virt_to_phys( - kbuffer + PAGE_SIZE * i) >> PAGE_SHIFT; + gpadl_header->range[0].pfn_array[i] = virt_to_hvpfn( + kbuffer + PAGE_SIZE * i); *msginfo = msgheader; pfnsum = pfncount; @@ -350,9 +364,8 @@ static int create_gpadl_header(void *kbuffer, u32 size, * so the hypervisor guarantees that this is ok. */ for (i = 0; i < pfncurr; i++) - gpadl_body->pfn[i] = slow_virt_to_phys( - kbuffer + PAGE_SIZE * (pfnsum + i)) >> - PAGE_SHIFT; + gpadl_body->pfn[i] = virt_to_hvpfn( + kbuffer + PAGE_SIZE * (pfnsum + i)); /* add to msg header */ list_add_tail(&msgbody->msglistentry, @@ -380,8 +393,8 @@ static int create_gpadl_header(void *kbuffer, u32 size, gpadl_header->range[0].byte_offset = 0; gpadl_header->range[0].byte_count = size; for (i = 0; i < pagecount; i++) - gpadl_header->range[0].pfn_array[i] = slow_virt_to_phys( - kbuffer + PAGE_SIZE * i) >> PAGE_SHIFT; + gpadl_header->range[0].pfn_array[i] = virt_to_hvpfn( + kbuffer + PAGE_SIZE * i); *msginfo = msgheader; } |