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hv: skip pSRAM for guest WBINVD emulation

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Use ept_flush_leaf_page to emulate guest WBINVD when PTCM is enabled and skip
the pSRAM in ept_flush_leaf_page.
TODO: do we need to emulate WBINVD in HV side.

Tracked-On: #5330
Signed-off-by: Qian Wang <qian1.wang@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Qian Wang 2020-10-27 15:16:53 +08:00 committed by wenlingz
parent f3067f5385
commit ca2aee225c
3 changed files with 47 additions and 5 deletions
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1
hypervisor/arch/x86/cpu.c
View File

@ -445,6 +445,7 @@ void cpu_dead(void)
if (bitmap_test(pcpu_id, &pcpu_active_bitmap)) {
/* clean up native stuff */
vmx_off();
/* TODO: a cpu dead can't effect the RTVM which use pSRAM */
cache_flush_invalidate_all();
/* Set state to show CPU is dead */

47
hypervisor/arch/x86/guest/ept.c
View File

@ -15,6 +15,7 @@
#include <vtd.h>
#include <logmsg.h>
#include <trace.h>
#include <ptct.h>
#define DBG_LEVEL_EPT 6U
@ -170,14 +171,52 @@ void ept_del_mr(struct acrn_vm *vm, uint64_t *pml4_page, uint64_t gpa, uint64_t
*/
void ept_flush_leaf_page(uint64_t *pge, uint64_t size)
{
uint64_t hpa = INVALID_HPA;
uint64_t flush_base_hpa = INVALID_HPA, flush_end_hpa;
void *hva = NULL;
uint64_t flush_size = size;
if ((*pge & EPT_MT_MASK) != EPT_UNCACHED) {
hpa = (*pge & (~(size - 1UL)));
hva = hpa2hva(hpa);
flush_base_hpa = (*pge & (~(size - 1UL)));
flush_end_hpa = flush_base_hpa + size;
/* When pSRAM is not intialized, both psram_area_bottom and psram_area_top is 0,
* so the below if/else will have no use
*/
if (flush_base_hpa < psram_area_bottom) {
/* Only flush [flush_base_hpa, psram_area_bottom) and [psram_area_top, flush_base_hpa),
* ignore [psram_area_bottom, psram_area_top)
*/
if (flush_end_hpa > psram_area_top) {
/* Only flush [flush_base_hpa, psram_area_bottom) and [psram_area_top, flush_base_hpa),
* ignore [psram_area_bottom, psram_area_top)
*/
flush_size = psram_area_bottom - flush_base_hpa;
hva = hpa2hva(flush_base_hpa);
stac();
flush_address_space(hva, flush_size);
clac();
flush_size = flush_end_hpa - psram_area_top;
flush_base_hpa = psram_area_top;
} else if (flush_end_hpa > psram_area_bottom) {
/* Only flush [flush_base_hpa, psram_area_bottom) and
* ignore [psram_area_bottom, flush_end_hpa)
*/
flush_size = psram_area_bottom - flush_base_hpa;
}
} else if (flush_base_hpa < psram_area_top) {
if (flush_end_hpa <= psram_area_top) {
flush_size = 0UL;
} else {
/* Only flush [psram_area_top, flush_end_hpa) and ignore [flush_base_hpa, psram_area_top) */
flush_base_hpa = psram_area_top;
flush_size = flush_end_hpa - psram_area_top;
}
}
hva = hpa2hva(flush_base_hpa);
stac();
flush_address_space(hva, size);
flush_address_space(hva, flush_size);
clac();
}
}

4
hypervisor/arch/x86/guest/vmexit.c
View File

@ -18,6 +18,7 @@
#include <vtd.h>
#include <vcpuid.h>
#include <trace.h>
#include <ptcm.h>
/*
* According to "SDM APPENDIX C VMX BASIC EXIT REASONS",
@ -382,7 +383,8 @@ static int32_t wbinvd_vmexit_handler(struct acrn_vcpu *vcpu)
uint16_t i;
struct acrn_vcpu *other;
if (has_rt_vm() == false) {
/* GUEST_FLAG_RT has not set in post-launched RTVM before it has been created */
if ((is_psram_initialized) || (has_rt_vm() == false)) {
cache_flush_invalidate_all();
} else {
if (is_rt_vm(vcpu->vm)) {