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hv: mmu: replace dynamic memory allocation in memory

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Replace dynamic memory allocation in memory management with static memory allocation.
Since the static memory allocation can guarantee the allocation never failed, so
split_large_page and construct_pgentry don't need to return a errno any more.
Besides, the destroy_ept don't need to free page any more. Instead, it would memset
the eptp to 0 to make sure we can't walk this paging table again.

Tracked-On: #861
Signed-off-by: Li, Fei1 <fei1.li@intel.com>
This commit is contained in:
Li, Fei1
2018-10-30 05:55:57 +08:00
committed by lijinxia
parent 9c7c0de08f
commit 0391f84c83
13 changed files with 147 additions and 236 deletions
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14
hypervisor/arch/x86/page.c
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@@ -5,11 +5,6 @@
*/
#include <hypervisor.h>
#define PML4_PAGE_NUM(size) 1UL
#define PDPT_PAGE_NUM(size) (((size) + PML4E_SIZE - 1UL) >> PML4E_SHIFT)
#define PD_PAGE_NUM(size) (((size) + PDPTE_SIZE - 1UL) >> PDPTE_SHIFT)
#define PT_PAGE_NUM(size) (((size) + PDE_SIZE - 1UL) >> PDE_SHIFT)
#define DEFINE_PGTABLE_PAGE(prefix, lvl, LVL, size) \
static struct page prefix ## lvl ## _pages[LVL ## _PAGE_NUM(size)]
@@ -66,8 +61,6 @@ const struct memory_ops ppt_mem_ops = {
.get_pd_page = ppt_get_pd_page,
};
/* The size of the guest physical address space, covered by the EPT page table of a VM */
#define EPT_ADDRESS_SPACE(size) ((size != 0UL) ? (size + PLATFORM_LO_MMIO_SIZE) : 0UL)
DEFINE_PGTABLE_PAGE(vm0_, pml4, PML4, EPT_ADDRESS_SPACE(CONFIG_SOS_RAM_SIZE));
DEFINE_PGTABLE_PAGE(vm0_, pdpt, PDPT, EPT_ADDRESS_SPACE(CONFIG_SOS_RAM_SIZE));
DEFINE_PGTABLE_PAGE(vm0_, pd, PD, EPT_ADDRESS_SPACE(CONFIG_SOS_RAM_SIZE));
@@ -79,13 +72,6 @@ static struct page uos_nworld_pdpt_pages[CONFIG_MAX_VM_NUM - 1U][PDPT_PAGE_NUM(E
static struct page uos_nworld_pd_pages[CONFIG_MAX_VM_NUM - 1U][PD_PAGE_NUM(EPT_ADDRESS_SPACE(CONFIG_UOS_RAM_SIZE))];
static struct page uos_nworld_pt_pages[CONFIG_MAX_VM_NUM - 1U][PT_PAGE_NUM(EPT_ADDRESS_SPACE(CONFIG_UOS_RAM_SIZE))];
#define TRUSTY_PML4_PAGE_NUM(size) (1UL)
#define TRUSTY_PDPT_PAGE_NUM(size) (1UL)
#define TRUSTY_PD_PAGE_NUM(size) (PD_PAGE_NUM(size))
#define TRUSTY_PT_PAGE_NUM(size) (PT_PAGE_NUM(size))
#define TRUSTY_PGTABLE_PAGE_NUM(size) \
(TRUSTY_PML4_PAGE_NUM(size) + TRUSTY_PDPT_PAGE_NUM(size) + TRUSTY_PD_PAGE_NUM(size) + TRUSTY_PT_PAGE_NUM(size))
static struct page uos_sworld_pgtable_pages[CONFIG_MAX_VM_NUM - 1U][TRUSTY_PGTABLE_PAGE_NUM(TRUSTY_RAM_SIZE)];
/* ept: extended page table*/